CN116683176A - Large-frequency-ratio double-frequency antenna - Google Patents

Abstract

The invention discloses a dual-frequency antenna with a large frequency ratio, which includes a dual-mode feeding network and a dual-frequency radiation network. The dual-mode feeding network is a hybrid feeding network based on a dielectric waveguide structure and a SICL structure. The dual-mode The dielectric waveguide structure of the feeding network is used to access high-frequency TEM mode electromagnetic waves, and convert the high-frequency TEM-mode electromagnetic waves into high-frequency TE10-mode electromagnetic waves and transmit them to the dual-frequency radiation network. The dual-mode feeding network The SICL structure is used to access the electromagnetic wave of the low-frequency TEM mode, and transmit the electromagnetic wave of the low-frequency TEM mode to the dual-frequency radiation network; the dual-frequency radiation network is used to transmit the electromagnetic wave of the dual-mode feed network to the TE10 mode and The electromagnetic waves of the TEM mode radiate to free space; the advantage is that while achieving a large frequency ratio, the profile is low.

Description

A dual frequency antenna with large frequency ratio

technical field

The invention relates to a dual-frequency antenna, in particular to a dual-frequency antenna with a large frequency ratio.

Background technique

With the rapid development of communication technology, spectrum resources become more and more precious. Although the microwave frequency band is widely used in daily life, it can no longer meet the current communication needs. The millimeter wave frequency band has the advantages of wide bandwidth, low delay and high data transmission rate, and also contains richer spectrum resources, which have been applied in the field of communication, which alleviates the spectrum pressure to a certain extent. However, at the same time, the millimeter wave frequency band also has shortcomings such as short wavelength and poor diffraction ability, so it cannot completely replace the microwave frequency band. Moreover, the single use of the millimeter wave frequency band cannot meet the requirements of the current communication technology development, so it is particularly important to design an antenna that works in the microwave frequency band and the millimeter wave frequency band at the same time. In addition, designing the microwave antenna and the millimeter wave antenna together can effectively reduce the volume of the antenna, which is more conducive to the application in the communication system.

The current study found that when the frequency ratio of the antenna is greater than 3, the antenna design becomes complicated. However, a dual-band antenna operating in the microwave frequency band and the millimeter-wave frequency band at the same time will have a larger frequency ratio (generally greater than 4), so the design of the dual-band antenna will definitely be more complicated and difficult. The existing high-frequency-ratio antennas mainly use frequency selective surfaces (FSS), partially reflective surfaces (PRS) and dielectric resonators, but this will inevitably lead to higher antenna profiles, which limits its use in range of applications in real life. For example, in the document "Dual-Band Dual-Polarized Shared-Aperture Grid Antenna with Large Frequency Ratio", a dual-frequency antenna with a large frequency ratio is proposed, and the antenna with a large frequency ratio is implemented based on a PRS structure. Therefore, the PRS structure has the dual functions of the microwave band patch antenna and the millimeter wave band PRS, thus the large frequency ratio dual-band antenna achieves a large frequency ratio effect, but the large size of the PRS structure results in a high profile. In addition, the dual-band antenna with a large frequency ratio uses a pair of orthogonal probes to excite the low-frequency band, and a cross-shaped waveguide to excite the high-frequency band. Increase. Finally, the section height of the dual-band antenna with large frequency ratio is 28.254mm, which is too high.

Contents of the invention

The technical problem to be solved by the present invention is to provide a high-frequency-ratio dual-frequency antenna with a low profile while realizing a high-frequency ratio.

The technical scheme adopted by the present invention to solve the above-mentioned technical problems is: a dual-frequency antenna with a large frequency ratio, including a dual-mode feed network and a dual-frequency radiation network. The dual-mode feed network is based on a dielectric waveguide structure and a SICL Structured hybrid feed network, the dielectric waveguide structure of the dual-mode feed network is used to access high-frequency TEM-mode electromagnetic waves, and convert high-frequency TEM-mode electromagnetic waves into high-frequency TE10-mode electromagnetic wave transmission To the dual-frequency radiation network, the SICL structure of the dual-mode feed network is used to access the electromagnetic wave of the low-frequency TEM mode, and transmit the electromagnetic wave of the low-frequency TEM mode to the dual-frequency radiation network; The dual-frequency radiation network is used to radiate the electromagnetic wave of TE10 mode and the electromagnetic wave of TEM mode transmitted to the dual-mode feeding network to free space.

The dual-mode feed network includes a first feed module and a second feed module; the first feed module includes a first layer of dielectric board, a second layer of dielectric board, a first feed unit, a second The feed unit and the one-to-sixty-four power-dividing network, the first-layer dielectric plate and the second-layer dielectric plate are circular plates with the same radius; the second-layer dielectric plate is located at the Below the first layer of dielectric board, the first layer of dielectric board and the second layer of dielectric board are arranged coaxially; the first feed unit and the second feed unit are circular copper plates with the same size sheet, the diameters of the first feed unit and the second feed unit are smaller than the diameter of the first layer of dielectric plate, and the first feed unit is attached to the first layer of dielectric plate On the surface, the second feeding unit is attached to the lower surface of the second layer of dielectric board, and 64 rectangular slits are opened on the first feeding unit, and the upper surface of the first layer of dielectric board The surface is exposed at 64 rectangular slits, and the 64 rectangular slits are evenly spaced in 8 rows and 8 columns to form a slit array; the column direction of the slit array is defined as the left-right direction, and the row direction is defined as the front-rear direction. The thickness direction of the first layer of dielectric board is defined as the up-down direction, the long side of each of the rectangular gaps is along the left-right direction, and the wide side is along the front-back direction; The one-layer medium board and the second-layer medium board, the one-point-sixty-four power dividing network is realized by SIW structure, has one input terminal and 64 output terminals, and the one-point sixty-four The 64 output terminals of the power dividing network correspond to the 64 rectangular slots one by one, and the second feed module includes a third feed unit, a fourth feed unit and eight fifth feed units; The third feeding unit is attached to the lower surface of the first layer dielectric board; the third feeding unit includes a first circular copper sheet and two isosceles trapezoidal copper sheets of the same size, and the two The two isosceles trapezoidal copper sheets are respectively referred to as the first trapezoidal copper sheet and the second trapezoidal copper sheet; the value diameter of the first circular copper sheet is smaller than the radius of the first layer of dielectric plate, and the first The upper bottom and the lower bottom of the trapezoidal copper sheet are all along the left-right direction, the lower bottom of the first trapezoidal copper sheet is located at the rear side of the upper bottom, and the first trapezoidal copper sheet is located at the first circular copper sheet. The front side of the sheet, the length of the lower bottom of the first trapezoidal copper sheet is less than the diameter of the first circular copper sheet, and the lower bottom of the first trapezoidal copper sheet has a starting end at its left end and an ending end at its left end. The first arc-shaped groove at the right end, the front part of the first circular copper sheet is embedded in the first arc-shaped groove and fully connected to the side wall of the first arc-shaped groove; The second trapezoidal copper sheet is located on the rear side of the first circular copper sheet, the upper and lower bottoms of the second trapezoidal copper sheet are all along the left and right direction, and the second trapezoidal copper sheet The lower bottom is located on the front side of its upper bottom, the length of the lower bottom of the second trapezoidal copper sheet is less than the diameter of the first circular copper sheet, and the lower bottom of the second trapezoidal copper sheet is opened with a starting end at the rear. Its left end, the end end is located in the second arc-shaped groove at its right end, the rear part of the first circular copper sheet is embedded in the second arc-shaped groove and is connected with the second arc-shaped groove The side walls are completely fitted and connected; if the first trapezoidal copper sheet is rotated 180 degrees around the central axis of the first circular copper sheet, it will completely overlap with the second trapezoidal copper sheet; The four feeding units are attached to the lower surface of the first layer of dielectric board; the fourth feeding unit is implemented by a stripline power dividing network divided into eight, and has one input terminal and eight output terminals, so The one-to-eight stripline power divider network includes seven one-to-two stripline power dividers, each of the one-to-two stripline power dividers has an input terminal and two output terminals, The input end of the first one-to-two stripline power divider is used as the input end of the one-to-eight stripline power divider network, and the two output terminals of the first one-to-two stripline power divider Connect with the input end of the second one-to-two stripline power divider and the input end of the third one-to-two stripline power divider one by one, and the second one-to-two stripline power divider The two output ports are connected one by one to the input end of the fourth one-to-two stripline power divider and the input end of the fifth one-to-two stripline power divider, and the third one-to-two stripline power divider The two output terminals of the power divider are connected one by one with the input terminal of the sixth one-point two-stripline power divider and the input end of the seventh one-point two-stripline power divider, and the fourth one-point The two output terminals of the two-stripline power divider, the two output terminals of the fifth one-to-two-stripline power divider, the two output terminals of the sixth one-to-two-stripline power divider and the first Two output terminals of 7 one-to-two stripline power dividers, a total of eight output terminals are used as the eight output terminals of the one-to-eight stripline power divider network, the first one-to-two stripline power divider A pair of choke branches are arranged near the two output ends of the line power divider; a plurality of metallized through-holes distributed at intervals are arranged around the fourth feed unit, and the plurality of metallized through-holes run through the The first layer of dielectric board and the second layer of dielectric board, a plurality of metallized through-holes are used to prevent energy leakage; each of the fifth feeding unit is implemented by using a "Γ-shaped" strip line , eight fifth feed units are respectively attached to the lower surface of the first layer of dielectric board, and are evenly spaced along a circle, any one of the fifth feed units rotates 45 degrees clockwise or counterclockwise, completely coincide with another fifth feeding unit adjacent to it, and when the eight fifth feeding units are projected onto the upper surface of the first layer dielectric board, the eight fifth feeding units will be distributed on the around the first feeding unit, and one end close to the first feeding unit will be respectively connected to the outer surface of the first feeding unit; the eight output ports of the fourth feeding unit are connected to the The eight fifth feed units described above are connected in one-to-one correspondence, the fourth feed unit and the eight fifth feed units together form a low-frequency feed network, the low-frequency feed network is a SICL structure, and the first The first layer of dielectric board, the second layer of dielectric board, the first feed unit, the second feed unit, the third feed unit and the one-to-sixty-four power dividing network constitute a high-frequency feed Electrical network; the high-frequency feed network is a dielectric waveguide structure;

The dual-frequency radiation network includes a low-frequency radiation network and a high-frequency radiation network, and the high-frequency radiation network includes a third-layer dielectric board and a first copper clad layer attached to the upper surface of the third-layer dielectric board, The third layer of medium plate is a circular plate, the diameter of the third layer of medium plate is equal to the diameter of the first layer of medium plate, the third layer of medium plate is located in the first layer of medium plate Above and both are coaxial, the first copper clad layer includes 64 first radiating units evenly spaced in 8 rows and 8 columns, each of the first radiating units is a rectangular copper sheet, The long-side direction of the first radiation unit is along the left-right direction, and the width-side direction is along the front-to-back direction. The 64 first radiation units correspond to the 64 rectangular slits up and down one by one, and a corresponding first radiating unit corresponds to a rectangular slit. Among them, the center of the first radiation unit and the center of the rectangular slit are on the same straight line perpendicular to the first layer of dielectric plate and the third layer of dielectric plate, and the width of the wide side of the rectangular slit is less than The wide side width of the first radiating unit, the long side length of the rectangular slot is less than the long side length of the first radiating unit, the low frequency radiation network includes eight second radiating units, eight The third radiating unit, eight fourth radiating units, eight fifth radiating units, eight sixth radiating units, eight seventh radiating units and eight eighth radiating units; eight second radiating units uniformly along a circle Distributed at intervals and around the outside of the first feed unit, any second radiating unit rotates 45 degrees clockwise or counterclockwise with the central axis of the first feed unit as the axis, and it will The other adjacent second radiating unit completely coincides; each of the second radiating units is an arc copper sheet, and the inner arc surfaces of the eight second radiating units are concentric with the first feeding unit, eight The outer arc surface of the second radiating unit is concentric with the first feeding unit, eight third radiating units are evenly spaced along a circle, and surround the outside of the first feeding unit, any one of the third radiating units The three radiating units rotate 45 degrees clockwise or counterclockwise with the central axis of the first feeding unit as the axis, and completely coincide with another third radiating unit adjacent to it; each of the third radiating units The units are all arc copper sheets, the inner arc surfaces of the eight third radiating units are concentric with the first feed unit, and the outer arc surfaces of the eight third radiating units are concentric with the first feed unit. In the center of the circle, eight third radiation units correspond to eight second radiation units one by one, one third radiation unit corresponds to one second radiation unit, the third radiation unit is located outside the second radiation unit, and Both are symmetrical with respect to the same diameter extension line of the first feeding unit; eight fourth radiating units are evenly spaced along a circle, and surround the outside of the first feeding unit, and any one of the fourth radiating units The four radiating units rotate 45 degrees clockwise or counterclockwise with the central axis of the first feeding unit as the axis, and completely coincide with another fourth radiating unit adjacent to it; each of the fourth radiating units The units are all arc copper sheets, the inner arc surfaces of the eight fourth radiating units are concentric with the first feed unit, and the outer arc surfaces of the eight fourth radiating units are concentric with the first feed unit. In the center of the circle, eight fourth radiation units correspond to eight third radiation units one by one, one fourth radiation unit corresponds to one third radiation unit, the fourth radiation unit is located outside the third radiation unit, and Both are symmetrical with respect to the same diameter extension line of the first feeding unit; the eight fifth radiating units are attached to the upper surface of the first layer dielectric plate, and the eight fifth radiating units Distributed at even intervals along a circle, and around the outside of the first feed unit, any fifth radiating unit rotates 45 degrees clockwise or counterclockwise to completely overlap with another fifth radiating unit adjacent to it ; The fifth radiating unit is made up of the first rectangular copper sheet, the first arc copper sheet and the second arc copper sheet, wherein the two long sides of the first rectangular copper sheet are in a symmetrical relationship A straight line passes through the center of the first feed unit, and a third arc-shaped groove is opened on the end surface of the first rectangular copper sheet close to the first feed unit, and the first feed unit is embedded in the In the third arc-shaped groove and connected with the side wall of the third arc-shaped groove, the first circular-arc copper sheet is located on one long side of the first rectangular copper sheet One side, and its starting end is connected with the long side of the first rectangular copper sheet, the second arc-shaped copper sheet is located on the side of the end end of the first arc-shaped copper sheet, and the The starting end of the second arc-shaped copper sheet is connected to the end end of the first arc-shaped copper sheet, and the inner arc surface of the first arc-shaped copper sheet is concentric with the first feed unit , the outer arc surface of the first arc copper sheet is concentric with the first feed unit, if the second arc copper sheet is connected to the first arc copper sheet as the axis, Rotating clockwise can be concentric with the first circular arc copper sheet, wherein the rotation angle is 0° to 90°; the eight fifth radiating units are located inside the eight second radiating units, and the eight fifth The radiating units correspond to the eight second radiating units one by one, among the corresponding one fifth radiating unit and one second radiating unit, eight sixth radiating units are attached to the lower surface of the second layer dielectric plate, eight The sixth radiating units are evenly spaced along a circle and surround the outside of the first feeding unit, and any one of the sixth radiating units is clockwise or counterclockwise with the central axis of the first feeding unit Turning 45 degrees will completely coincide with another sixth radiating unit adjacent to it; if eight sixth radiating units are projected onto the upper surface of the first layer of dielectric plate, eight sixth radiating units and eight The fifth radiating units are in one-to-one correspondence, and the corresponding sixth radiating unit and one fifth radiating unit are symmetrical to a diameter extension line of the first feeding unit, thus, eight sixth radiating units and eight The fifth radiating unit has 8 symmetry lines, and these 8 symmetry lines are also the symmetry lines of the eight second radiating units, the symmetry lines of the eight third radiating units and the symmetry lines of the eight fourth radiating units; A seventh radiating unit is attached to the upper surface of the first layer of dielectric board, eight seventh radiating units are evenly spaced along a circle, and surround the outside of the first feeding unit, any seventh radiating unit The unit rotates 45 degrees clockwise or counterclockwise with the central axis of the first feed unit as the axis, and completely overlaps another seventh radiating unit adjacent to it; each of the seventh radiating units is It is a circular arc copper sheet, eight seventh radiating units and eight second radiating units are intersected, there is a second radiating unit between every two adjacent seventh radiating units, and there is a second radiating unit between every two adjacent second radiating units There is a seventh radiating unit between them, the distance between any adjacent seventh radiating unit and a second radiating unit is equal, and the outer arc surfaces of the eight seventh radiating units are concentric with the first feeding unit, The inner arc surfaces of the eight seventh radiating units are concentric with the first feed unit, and the eight eighth radiating units are attached to the upper surface of the first layer of dielectric board, and the eight eighth radiating units are along a The circles are evenly spaced and surround the outside of the first feed unit, and any one of the eighth radiating units rotates 45 degrees clockwise or counterclockwise with the central axis of the first feed unit as the axis, and the It completely overlaps with another eighth radiation unit adjacent to it; each of the eighth radiation units is an arc copper sheet, eight eighth radiation units and eight third radiation units are intersected, and each adjacent two There is a third radiation unit between the eighth radiation units, there is an eighth radiation unit between every two adjacent third radiation units, and the distance between any adjacent eighth radiation unit and a third radiation unit is equal , the outer arc surfaces of the eighth eighth radiating units are concentric with the first feed unit, the inner arc surfaces of the eight eighth radiating units are concentric with the first feed unit, and the eight eighth radiating units are concentric with the first feed unit. The radiation unit is in one-to-one correspondence with the eight seventh radiation units, and one eighth radiation unit corresponds to one seventh radiation unit, and the eighth radiation unit is located outside the seventh radiation unit.

Compared with the prior art, the present invention has the advantage of forming a dual-frequency antenna with a large frequency ratio through a dual-mode feed network and a dual-frequency radiation network, and the dual-mode feed network is a hybrid feed network based on a dielectric waveguide structure and a SICL structure , the dielectric waveguide structure of the dual-mode feed network is connected to the high-frequency TEM mode electromagnetic wave, and the high-frequency TEM mode electromagnetic wave is converted into a high-frequency TE10 mode electromagnetic wave and transmitted to the dual-frequency radiation network, the dual-mode feed network The SICL structure accesses the electromagnetic wave of the low-frequency TEM mode, and transmits the electromagnetic wave of the low-frequency TEM mode to the dual-frequency radiation network, and the dual-frequency radiation network is used to transmit the electromagnetic wave of the TE10 mode and the TEM of the dual-mode feed network to it. The electromagnetic wave of the mode radiates to free space. Since the dual-mode feed network is a hybrid feed network based on a dielectric waveguide structure and a SICL structure, the SICL structure can be built inside the dielectric waveguide structure, so that the size of the dual-mode feed network is small and the cross-section The final overall antenna structure profile is low. In addition, the high-frequency signal is transmitted through the dielectric waveguide structure, and the low-frequency signal is transmitted through the SICL structure. The transmission of high-frequency signals and low-frequency signals is completely independent and does not interfere with each other, so that a large frequency ratio can be achieved .

Description of drawings

Fig. 1 is the three-dimensional view of the dual-band antenna with large frequency ratio of the present invention;

Fig. 2 is the explosion diagram of the dual frequency antenna with large frequency ratio of the present invention;

Fig. 3 is the schematic structural diagram of the high-frequency feeding network of the dual-frequency antenna with large frequency ratio of the present invention;

Fig. 4 is the schematic structural diagram of the low-frequency feeding network of the dual-frequency antenna with large frequency ratio of the present invention;

Fig. 5 is the structure diagram of the third feeding unit of the high-frequency feeding network of the dual-frequency antenna with large frequency ratio of the present invention;

Fig. 6 is a structural schematic diagram of the first layer dielectric board, the second layer dielectric board and the upper unit of the large frequency ratio dual-frequency antenna of the present invention;

7 is a schematic structural diagram of a high-frequency radiation network of a dual-frequency antenna with a large frequency ratio of the present invention;

8 is a schematic structural diagram of a low-frequency radiation network of a dual-frequency antenna with a large frequency ratio of the present invention;

Fig. 9 is the low-frequency reflection coefficient and gain diagram of the dual-frequency antenna with large frequency ratio of the present invention;

Fig. 10 is the low-frequency normalized pattern of the dual-frequency antenna with large frequency ratio of the present invention;

Fig. 11 is the high-frequency reflection coefficient and gain diagram of the dual-band antenna with large frequency ratio of the present invention;

Fig. 12 is the normalized direction diagram of the high-frequency E plane of the dual-frequency antenna with large frequency ratio of the present invention;

Fig. 13 is a high-frequency H-plane normalized pattern of the dual-frequency antenna with large frequency ratio of the present invention.

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

Embodiment 1: A dual-frequency antenna with a large frequency ratio includes a dual-mode feed network and a dual-frequency radiation network. The dual-mode feed network is a hybrid feed network based on a dielectric waveguide structure and a SICL structure. The dual-mode feed network The dielectric waveguide structure is used to access high-frequency TEM-mode electromagnetic waves, and convert the high-frequency TEM-mode electromagnetic waves into high-frequency TE10-mode electromagnetic waves for transmission to the dual-frequency radiation network. The SICL structure of the dual-mode feed network is used It is used to access the electromagnetic wave of the low-frequency TEM mode, and transmit the electromagnetic wave of the low-frequency TEM mode to the dual-frequency radiation network; the dual-frequency radiation network is used to transmit the electromagnetic wave of the TE10 mode and the TEM mode of the dual-mode feed network to it. Electromagnetic waves radiate into free space.

Embodiment 2: This embodiment is basically the same as Embodiment 1, the difference is that: as shown in Figures 1 to 6, in this embodiment, the dual-mode feed network includes a first feed module and a second feed module; A feed module includes a first-layer dielectric board 1, a second-layer dielectric board 2, a first feed unit 3, a second feed unit 4, and a one-to-sixty-four power distribution network 5, the first-layer dielectric board 1 and The second layer of dielectric plate 2 is a circular plate with the same radius; the second layer of dielectric plate 2 is located below the first layer of dielectric plate 1, and the first layer of dielectric plate 1 and the second layer of dielectric plate 2 are coaxially arranged; the first feeder The electric unit 3 and the second feed unit 4 are circular copper sheets with the same size, and the diameters of the first feed unit 3 and the second feed unit 4 are smaller than the diameter of the first layer dielectric plate 1, and the first feed unit 3 Attached to the upper surface of the first layer of dielectric board 1, the second feed unit 4 is attached to the lower surface of the second layer of dielectric board 2, the first feed unit 3 is provided with 64 rectangular slots 6, the first layer of dielectric board The upper surface of 1 is exposed at 64 rectangular slits 6, and the 64 rectangular slits 6 are evenly spaced in 8 rows and 8 columns to form a slit array; the column direction of the slit array is defined as the left-right direction, and the row direction is defined as the front-rear direction , the thickness direction of the first layer of dielectric board 1 is defined as the up and down direction, the long side of each rectangular slit 6 is along the left and right direction, and the wide side is along the front and rear direction; the one-point sixty-four power distribution network 5 is arranged on the first layer of dielectric board 1 and the second On the second-layer medium board 2, the one-to-sixty-four power distribution network 5 is realized by SIW structure, and has one input terminal and 64 output terminals, and the one-to-sixty-four power distribution network 5 has 64 output terminals and 64 rectangular The slots 6 correspond one-to-one, and the second feed module includes a third feed unit 7, a fourth feed unit 8 and eight fifth feed units 9; the third feed unit 7 is attached to the Lower surface; the third feed unit 7 includes a first circular copper sheet 71 and two isosceles trapezoidal copper sheets of the same size, the two isosceles trapezoidal copper sheets are referred to as the first trapezoidal copper sheet 72 and the second trapezoidal copper sheet respectively Copper sheet 73; the diameter of the first circular copper sheet 71 is smaller than the radius of the first layer of dielectric board 1, the upper bottom and the lower bottom of the first trapezoidal copper sheet 72 are all along the left and right direction, and the lower bottom of the first trapezoidal copper sheet 72 is located at The rear side of its upper bottom, the first trapezoidal copper sheet 72 is positioned at the front side of the first circular copper sheet 71, the bottom length of the first trapezoidal copper sheet 72 is less than the diameter of the first circular copper sheet 71, the first trapezoidal copper sheet 72 The lower bottom of the sheet 72 is provided with a starting end positioned at its left end, and an end end positioned at a first arc-shaped groove at its right-hand end. The side walls of the groove are fully fitted and connected; the second trapezoidal copper sheet 73 is positioned at the rear side of the first circular copper sheet 71, and the upper and lower bottoms of the second trapezoidal copper sheet 73 are all along the left-right direction, and the second trapezoidal copper sheet 73 The lower end of the second trapezoidal copper sheet 73 is positioned at the front side of its upper end, the lower end length of the second trapezoidal copper sheet 73 is less than the diameter of the first circular copper sheet 71, and the lower end of the second trapezoidal copper sheet 73 is provided with a starting end positioned at its left end. , the end end is positioned at the second arc-shaped groove at its right end, the rear portion of the first circular copper sheet 71 is embedded in the second arc-shaped groove and is completely fitted and connected with the side wall of the second arc-shaped groove; if the first The trapezoidal copper sheet 72 rotates 180 degrees around the central axis of the first circular copper sheet 71, and will completely overlap with the second trapezoidal copper sheet 73; the fourth feed unit 8 is attached to the lower surface of the first layer of dielectric board 1; the fourth The feed unit 8 is realized by a one-to-eight stripline power divider network, which has one input terminal and eight output terminals. The one-to-eight stripline power divider network includes seven one-to-two stripline power dividers, Each one-to-two stripline power divider has one input terminal and two output terminals, and the input terminal of the first one-to-two stripline power divider is used as the input to the one-to-eight stripline power divider network Terminal, the two output terminals of the first one-to-two stripline power divider and the input of the second one-to-two stripline power divider and the input of the third one-to-two stripline power divider One-to-one connection, the two output terminals of the second one-to-two stripline power divider are connected to the input terminals of the fourth one-to-two stripline power divider and the fifth one-to-two stripline power divider The input terminals of the divider are connected in one-to-one correspondence, the two output terminals of the third one-to-two stripline power divider are connected to the input terminals of the sixth one-to-two stripline power divider and the seventh one-to-two The input terminals of the stripline power divider are connected one by one, the two output terminals of the fourth one-to-two stripline power divider, the two output terminals of the fifth one-to-two stripline power divider, The two output terminals of the sixth one-to-two stripline power divider and the two output terminals of the seventh one-to-two stripline power divider, a total of eight output terminals are used as a one-to-eight stripline power divider The eight output ends of the sub-network, a pair of choke stubs 10 are arranged near the two output ends of the first one-point-two stripline power divider; a plurality of interval distributions are arranged around the fourth feed unit 8 Metallized through holes 11, a plurality of metallized through holes 11 run through the first layer of dielectric board 1 and the second layer of dielectric board 2, a plurality of metallized through holes 11 are used to prevent energy leakage; each fifth feed unit 9 A "Γ-shaped" strip line is used to realize the eight fifth feeding units 9 respectively attached to the lower surface of the first layer of dielectric board 1, and are evenly spaced along a circle, and any fifth feeding unit 9 is turned clockwise or counterclockwise by 45 degrees to completely overlap another fifth feeding unit 9 adjacent to it. When eight fifth feeding units 9 are projected onto the upper surface of the first layer of dielectric board 1, Eight fifth feed units 9 will be distributed around the first feed unit 3, and one end near the first feed unit 3 will be respectively connected to the outer side of the first feed unit 3; the fourth feed unit The eight output ports of 8 are connected to the eight fifth feed units 9 in one-to-one correspondence, and the fourth feed unit 8 and the eight fifth feed units 9 together form a low-frequency feed network, which is a SICL structure , the first layer of dielectric board 1, the second layer of dielectric board 2, the first feed unit 3, the second feed unit 4, the third feed unit 7 and the one-to-sixty-four power distribution network 5 form a high-frequency feed network; the high-frequency feed network is a dielectric waveguide structure;

As shown in Figures 6 to 7, in this embodiment, the dual-frequency radiation network includes a low-frequency radiation network and a high-frequency radiation network, and the high-frequency radiation network includes a third layer of dielectric board 12 and an upper surface attached to the third layer of dielectric board 12 The first copper clad layer 13, the third layer of dielectric board 12 is a circular plate, the diameter of the third layer of dielectric board 12 is equal to the diameter of the first layer of dielectric board 1, the third layer of dielectric board 12 is located on the first layer of dielectric board 1 above and both are coaxial, the first copper clad layer 13 includes 64 first radiating units 14 evenly spaced in 8 rows and 8 columns, each of the first radiating units 14 is a rectangular copper sheet, the first The long side direction of the radiating unit 14 is along the left-right direction, and the wide side direction is along the front-back direction. The 64 first radiating units 14 correspond to the 64 rectangular slits 6 up and down, and the corresponding first radiating unit 14 corresponds to a rectangular slit 6 Among them, the center of the first radiating unit 14 and the center of the rectangular slit 6 are on the same straight line perpendicular to the first layer of dielectric plate 1 and the third layer of dielectric plate 12, and the width of the wide side of the rectangular slit 6 is smaller than that of the first radiating unit 14, the length of the long side of the rectangular slit 6 is less than the length of the long side of the first radiating unit 14, and the low-frequency radiation network includes eight second radiating units 15, eight third radiating units 16, and eight fourth radiating units 17. Eight fifth radiating units 18, eight sixth radiating units 19, eight seventh radiating units 20, and eight eighth radiating units 21; eight second radiating units 15 are evenly spaced along a circle, and surround On the outside of the first feeding unit 3, any second radiating unit 15 rotates 45 degrees clockwise or counterclockwise with the central axis of the first feeding unit 3 as the axis, and another second radiating unit adjacent to it 15 are completely coincident; each second radiating unit 15 is an arc copper sheet, the inner arc surfaces of the eight second radiating units 15 are concentric with the first feeding unit 3, and the outer arc surfaces of the eight second radiating units 15 Concentric with the first feeding unit 3, eight third radiating units 16 are evenly spaced along a circle and surround the outside of the first feeding unit 3, any third radiating unit 16 is The central axis is that the axis rotates 45 degrees clockwise or counterclockwise, and it will completely coincide with another third radiation unit 16 adjacent to it; each third radiation unit 16 is an arc copper sheet, and eight third radiation units The inner arc surface of 16 is concentric with the first feeding unit 3, the outer arc surface of the eight third radiating units 16 is concentric with the first feeding unit 3, and the eight third radiating units 16 and eight second radiating units 15 in one-to-one correspondence, corresponding to a third radiating unit 16 and a second radiating unit 15, the third radiating unit 16 is located outside the second radiating unit 15, and both of them are opposite to the first feeding unit The extension line of the same diameter of 3 is symmetrical; eight fourth radiating units 17 are evenly spaced along a circle, and surround the outside of the first feeding unit 3, any fourth radiating unit 17 is centered on the center of the first feeding unit 3 The axis is that the axis rotates 45 degrees clockwise or counterclockwise to completely coincide with another fourth radiating unit 17 adjacent to it; each fourth radiating unit 17 is an arc copper sheet, and eight fourth radiating units 17 The inner arc surface of the eight fourth radiating units 17 is concentric with the first feeding unit 3, the outer arc surface of the eight fourth radiating units 17 is concentric with the first feeding unit 3, the eight fourth radiating units 17 and the eight third radiating units 16 One-to-one correspondence, corresponding to a fourth radiating unit 17 and a third radiating unit 16, the fourth radiating unit 17 is located outside the third radiating unit 16, and both of them are opposite to the first feeding unit 3 The same diameter extension line is symmetrical; eight fifth radiating units 18 are attached to the upper surface of the first layer dielectric plate 1, and the eight fifth radiating units 18 are evenly spaced along a circle, and surround the first feeding unit 3 On the outside, any fifth radiating unit 18 rotates 45 degrees clockwise or counterclockwise to completely overlap another fifth radiating unit 18 adjacent to it; the fifth radiating unit 18 is composed of the first rectangular copper sheet 181, the first Arc copper sheet 182 and the second arc copper sheet 183 are made up of, and wherein, make the two long sides of the first rectangular copper sheet 181 a straight line that is symmetrical relation pass through the center of circle of the first feed unit 3, the first rectangular copper sheet 181 is provided with a third arc-shaped groove on the end surface close to the first feed unit 3, and the first feed unit 3 is embedded in the third arc-shaped groove and connected to the side wall of the third arc-shaped groove. An arc copper sheet 182 is positioned at the side of a long side of the first rectangular copper sheet 181, and its starting end is connected with this long side of the first rectangular copper sheet 181, and the second arc-shaped copper sheet is positioned at the first circle. One side of the end end of the arc-shaped copper sheet, the start end of the second arc-shaped copper sheet is connected to the end end of the first arc-shaped copper sheet, and the inner arc surface of the first arc-shaped copper sheet 182 is connected to the first feed unit 3 have the same center, the outer arc surface of the first arc copper sheet 182 is concentric with the first feed unit 3, if the second arc copper sheet 183 takes its connection with the first arc copper sheet 182 as the axis, along the Rotating in the clockwise direction can be concentric with the first arc copper sheet 182, wherein the rotation angle is 0° to 90°; the eight fifth radiating units 18 are located inside the eight second radiating units 15, and the eight fifth radiating units 18 is in one-to-one correspondence with eight second radiation units 15, and among the corresponding fifth radiation unit 18 and one second radiation unit 15, eight sixth radiation units 19 are attached to the lower surface of the second dielectric board 2, Eight sixth radiating units 19 are evenly spaced along a circle and surround the outside of the first feeding unit 3 , and any sixth radiating unit 19 rotates clockwise or counterclockwise with the central axis of the first feeding unit 3 45 degrees, will completely coincide with another sixth radiating unit 19 adjacent to it; if eight sixth radiating units 19 are projected onto the upper surface of the first layer of dielectric plate 1, eight sixth radiating units 19 and eight The fifth radiating units 18 correspond one-to-one, and the corresponding sixth radiating unit 19 and one fifth radiating unit 18 are symmetrical with respect to a diameter extension line of the first feeding unit 3 , thus, the eight sixth radiating units 19 There are 8 lines of symmetry with the eight fifth radiating units 18, and these 8 symmetry lines are also the symmetry lines of the eight second radiating units 15, the symmetry lines of the eight third radiating units 16 and the eight fourth radiating units 17 line of symmetry; eight seventh radiating units 20 are attached to the upper surface of the first dielectric board 1, and the eight seventh radiating units 20 are evenly spaced along a circle, and surround the outside of the first feeding unit 3, any A seventh radiating unit 20 rotates 45 degrees clockwise or counterclockwise with the central axis of the first feeding unit 3 as the axis, and completely overlaps another seventh radiating unit 20 adjacent to it; each seventh radiating unit 20 are arc copper sheets, eight seventh radiating units 20 and eight second radiating units 15 are intersected, and there is a second radiating unit 15 between every two adjacent seventh radiating units 20, and every adjacent two There is a seventh radiating unit 20 between the second radiating units 15, the distance between any adjacent seventh radiating unit 20 and a second radiating unit 15 is equal, and the outer arc surfaces of the eight seventh radiating units 20 and The first feeding unit 3 is concentric, the inner arc surfaces of the eight seventh radiating units 20 are concentric with the first feeding unit 3, the eighth radiating units 21 are attached to the upper surface of the first dielectric board 1, eight Eighth radiating units 21 are evenly spaced along a circle and surround the outside of the first feeding unit 3, and any eighth radiating unit 21 is clockwise or counterclockwise with the central axis of the first feeding unit 3 as the axis Rotate 45 degrees to completely overlap another eighth radiating unit 21 adjacent to it; each eighth radiating unit 21 is a circular arc copper sheet, and eight eighth radiating units 21 and eight third radiating units 16 are distributed across , there is a third radiation unit 16 between every two adjacent eighth radiation units 21, there is an eighth radiation unit 21 between every two adjacent third radiation units 16, and any adjacent eighth radiation unit 21 The distance between the third radiating unit 16 is equal, the outer arc surfaces of the eighth radiating units 21 are concentric with the first feeding unit 3, and the inner arc surfaces of the eighth radiating units 21 are concentric with the first feeding unit 3. The units 3 are concentric, eight eighth radiation units 21 correspond to eight seventh radiation units 20 one by one, one eighth radiation unit 21 corresponds to one seventh radiation unit 20, and the eighth radiation unit 21 is located at the The outer side of the seven radiating units 20 .

The working principle of the large frequency ratio dual-frequency antenna of this embodiment is: the input end of the fourth feed unit 8 is connected to the first coaxial feed line, and the third feed unit 7 is connected to the second coaxial feed line. connection, the first coaxial feeder couples the electromagnetic waves of the low-frequency TEM mode to the fourth feeder unit 8, and the fourth feeder unit 8 divides the electromagnetic waves coupled to the TEM mode into eight paths, and transmits them one by one to On the eight fifth feeding units 9, the eight fifth feeding units 9 couple the electromagnetic wave in TEM mode transmitted thereto to the eight fifth radiating units 18 and eight sixth radiating units 19, and the eight fifth radiating units 19 The five radiating units 18 and the eight sixth radiating units 19 radiate the electromagnetic waves of the TEM mode coupled thereto to free space, and the second coaxial feeder couples the electromagnetic waves of the high-frequency TEM mode to the third feeding unit 7. The third feeding unit 7 converts the high-frequency TEM-mode electromagnetic waves into high-frequency TE10-mode electromagnetic waves and transmits them to the input end of the one-to-sixty-four power distribution network 5, and the one-to-sixty-four power distribution network 5 will The electromagnetic waves of the high-frequency TE10 mode are divided into 64 channels and transmitted to 64 rectangular slots 6 one by one through its 64 output ports, and the 64 rectangular slots 6 couple the electromagnetic waves of the high-frequency TE10 mode transmitted thereto to 64 On the first radiating unit 14 , 64 first radiating units 14 radiate high-frequency TE10 mode electromagnetic waves into free space. Among them, eight second radiating units 15, eight third radiating units 16 and eight fourth radiating units 17 are used as directional patches to realize the omnidirectional effect of the horizontal plane, and prevent the beam from tilting up and down, realizing more Good horizontal beam pointing. The eight seventh radiation units 20 and the eighth radiation units 21 achieve a better omnidirectional radiation effect, and the choke stub 10 can reduce the influence of the electromagnetic wave in the TEM mode on the high frequency, improve the high frequency and Low frequency isolation.

In order to verify the performance of the dual-frequency antenna with large frequency ratio of the present invention, a simulation is performed on the dual-frequency antenna with large frequency ratio of the present invention. Wherein, the low-frequency reflection coefficient and gain diagram of the large-frequency ratio dual-frequency antenna of the present invention are shown in Figure 9, and the low-frequency normalized pattern of the large-frequency ratio dual-frequency antenna of the present invention is shown in Figure 10, and the large-frequency ratio dual-frequency antenna of the present invention is shown in Figure 10. The high-frequency reflection coefficient and gain diagram of the frequency ratio dual-frequency antenna are as shown in Figure 11, and the normalized direction diagram of the high-frequency E plane of the large frequency ratio dual-frequency antenna of the present invention is shown in Figure 12, and the large frequency ratio of the present invention The high-frequency H-plane normalized pattern of the dual-band antenna is shown in Figure 13. Analysis of Fig. 9 shows that the reflection coefficient of the large-frequency ratio dual-band antenna of the present invention is less than -10dB in the low frequency band 3-3.6GHz, and the gain fluctuation is small; analysis of Fig. 10 shows that the large-frequency ratio dual-band antenna of the present invention has an The main polarization in the normalized pattern shows a relatively regular circle, showing good omnidirectional characteristics, and the cross polarization is less than -30dB. Analysis of Figure 11 shows that the high-frequency ratio dual-frequency antenna of the present invention has a reflection coefficient less than -10dB in the high-frequency band 26-29.5GHz, and the gain fluctuation is small; analysis of Figure 12 shows that the large-frequency ratio dual-frequency antenna of the present invention is at 28GHz E The main polarization in the plane normalized pattern shows good directional characteristics, and the cross polarization is less than -30dB; analysis of Figure 13 shows that the dual-band antenna with large frequency ratio of the present invention has a main polarization in the normalized pattern of the 28GHz H plane. The polarization exhibits good directional characteristics, and the cross-polarization is less than -30dB. It can be seen that the dual-frequency antenna with large frequency ratio of the present invention realizes high frequency ratio while reducing the profile through the dual-mode feeding network, and realizes omnidirectional radiation at low frequencies and directional radiation at high frequencies.

Claims (3)

1. a large frequency ratio dual-frequency antenna is characterized in that comprising a dual-mode feed network and a dual-frequency radiation network, and said dual-mode feed network is based on a dielectric waveguide structure and a hybrid feed network based on a SICL structure, so The dielectric waveguide structure of the dual-mode feeding network is used to access high-frequency TEM-mode electromagnetic waves, and convert the high-frequency TEM-mode electromagnetic waves into high-frequency TE10-mode electromagnetic waves and transmit them to the dual-frequency radiation network , the SICL structure of the dual-mode feeding network is used to access low-frequency TEM-mode electromagnetic waves, and transmit the low-frequency TEM-mode electromagnetic waves to the dual-frequency radiation network; the dual-frequency radiation network is used for The TE10-mode electromagnetic wave and the TEM-mode electromagnetic wave transmitted to the dual-mode feeding network are radiated to free space. 2. A dual-frequency antenna with a large frequency ratio according to claim 1, wherein said dual-mode feed network includes a first feed module and a second feed module; said first feed module It includes a first-layer dielectric board, a second-layer dielectric board, a first feed unit, a second feed unit and a one-to-sixty-four power division network, the first-layer dielectric board and the second-layer dielectric The plates are circular plates with the same radius; the second-layer dielectric plate is located below the first-layer dielectric plate, and the first-layer dielectric plate and the second-layer dielectric plate are arranged coaxially; The first feed unit and the second feed unit are circular copper sheets of the same size, and the diameters of the first feed unit and the second feed unit are smaller than the diameter of the first layer of dielectric board , the first feeding unit is attached to the upper surface of the first dielectric board, the second feeding unit is attached to the lower surface of the second dielectric board, and the first There are 64 rectangular slits on the feed unit, the upper surface of the first layer of dielectric board is exposed at 64 rectangular slits, and the 64 rectangular slits are evenly spaced in 8 rows and 8 columns to form a slit array; The column direction of the slit array is defined as the left-right direction, the row direction is defined as the front-rear direction, the thickness direction of the first layer of dielectric board is defined as the up-down direction, and the long side of each rectangular slit is along the left-right direction, with a width of Front and rear directions along the edge; the one-to-sixty-four power distribution network is arranged on the first layer of dielectric board and the second layer of dielectric board, and the one-to-sixty-four power distribution network adopts the SIW structure To achieve, there is one input terminal and 64 output terminals, the 64 output terminals of the one-to-sixty-four power dividing network correspond to the 64 rectangular slots one by one, and the second feed module includes The third feed unit, the fourth feed unit and eight fifth feed units; the third feed unit is attached to the lower surface of the first layer of dielectric board; the third feed unit Including the first circular copper sheet and two isosceles trapezoidal copper sheets of the same size, the two isosceles trapezoidal copper sheets are respectively referred to as the first trapezoidal copper sheet and the second trapezoidal copper sheet; the first circular copper sheet The diameter of the sheet is smaller than the radius of the first layer of dielectric board, the upper bottom and the lower bottom of the first trapezoidal copper sheet are all along the left and right direction, and the lower bottom of the first trapezoidal copper sheet is located at the upper bottom of the first trapezoidal copper sheet. On the rear side, the first trapezoidal copper sheet is located on the front side of the first circular copper sheet, and the length of the bottom of the first trapezoidal copper sheet is less than the diameter of the first circular copper sheet, and the The lower bottom of the first trapezoidal copper sheet is provided with a first arc-shaped groove whose starting end is located at its left end and whose ending end is located at its right-hand end, and the front part of the first circular copper sheet is embedded in the first arc-shaped groove inside and completely fit and connected with the side wall of the first arc-shaped groove; the second trapezoidal copper sheet is located on the rear side of the first circular copper sheet, and the second trapezoidal copper sheet The upper bottom and the lower bottom of the second trapezoidal copper sheet are all along the left and right direction, the lower bottom of the second trapezoidal copper sheet is located on the front side of the upper end, and the length of the lower bottom of the second trapezoidal copper sheet is less than that of the first circular copper sheet. Diameter, the lower bottom of the second trapezoidal copper sheet faces back and has a second arc-shaped groove whose starting end is located at its left end and whose ending end is located at its right end, and the rear part of the first circular copper sheet is embedded in the In the second arc-shaped groove and completely attached to the side wall of the second arc-shaped groove; if the first trapezoidal copper sheet rotates around the central axis of the first circular copper sheet 180 degrees, will completely coincide with the second trapezoidal copper sheet; the fourth feeding unit is attached to the lower surface of the first layer of dielectric board; the fourth feeding unit adopts one-to-eight The stripline power dividing network realizes, has an input terminal and eight output terminals, and the described one-to-eight stripline power dividing network includes 7 one-to-two stripline power dividers, each of the described The one-to-two stripline power divider has an input terminal and two output terminals, and the input terminal of the first one-to-two stripline power divider is used as the one-to-eight stripline power divider network. Input terminal, the two output terminals of the first one-to-two stripline power divider and the input end of the second one-to-two stripline power divider and the third one-to-two stripline power divider The input terminals are connected in one-to-one correspondence, the two output terminals of the second one-to-two stripline power divider are connected to the input terminals of the fourth one-to-two stripline power divider and the fifth one-to-two stripline power divider The input terminals of the power divider are connected in one-to-one correspondence, and the two output terminals of the third one-point two-stripline power divider are connected with the input terminals of the sixth one-point two-stripline power divider and the seventh one-point two-stripline power divider. The input terminals of the two-stripline power divider are connected in one-to-one correspondence, the two output terminals of the fourth one-to-two-stripline power divider, and the two output terminals of the fifth one-to-two-stripline power divider , the two output ends of the sixth one-to-two stripline power divider and the two output ends of the seventh one-to-two stripline power divider, a total of eight output terminals are used as the said one-to-eight For the eight output ends of the stripline power divider network, a pair of choke stubs are arranged near the two output ends of the first one-point two-stripline power divider; the fourth feed unit is surrounded by A plurality of metallized through holes distributed at intervals, the plurality of metallized through holes run through the first layer of dielectric board and the second layer of dielectric board, and the plurality of metallized through holes are used to prevent energy leakage; each The fifth feed unit respectively adopts a " "shaped" stripline, eight fifth feed units are respectively attached to the lower surface of the first layer of dielectric board, and distributed along a circle evenly spaced, any fifth feed unit clockwise or counterclockwise Rotating 45 degrees in the clockwise direction will completely coincide with another fifth feeding unit adjacent to it. When the eight fifth feeding units are projected onto the upper surface of the first layer of dielectric board, the eight fifth feeding units The units will be distributed around the first feed unit, and one end close to the first feed unit will be respectively connected to the outer surface of the first feed unit; the fourth feed unit The eight output ports are connected to the eight fifth feed units in one-to-one correspondence, and the fourth feed unit and the eight fifth feed units together form a low-frequency feed network, and the low-frequency feed network is SICL structure, the first layer of dielectric board, the second layer of dielectric board, the first feed unit, the second feed unit, the third feed unit and the The one-to-sixty-four power division network constitutes a high-frequency feed network; the high-frequency feed network is a dielectric waveguide structure. 3. A dual-frequency antenna with a large frequency ratio according to claim 2, wherein the dual-frequency radiation network includes a low-frequency radiation network and a high-frequency radiation network, and the high-frequency radiation network includes a third layer of medium plate and the first copper clad layer attached to the upper surface of the third layer dielectric board, the third layer dielectric board is a circular plate, and the diameter of the third layer dielectric board is equal to the first The diameter of the first layer of dielectric board, the third layer of dielectric board is located above the first layer of dielectric board and both are coaxial, and the first copper clad layer includes 64 evenly spaced and arranged in 8 rows and 8 columns The first radiating unit, each of the first radiating units is a rectangular copper sheet, the long side direction of the first radiating unit is along the left-right direction, the wide side direction is along the front-back direction, and the 64 first radiating units are connected to the The 64 rectangular slots are in one-to-one correspondence, and in a corresponding first radiation unit and a rectangular slot, the center of the first radiation unit and the center of the rectangular slot are perpendicular to the first dielectric plate and the On the same straight line of the third dielectric plate, the width of the wide side of the rectangular slit is smaller than the width of the wide side of the first radiating unit, and the length of the long side of the rectangular slit is smaller than the first radiating unit The length of the long side, the low-frequency radiation network includes eight second radiation units, eight third radiation units, eight fourth radiation units, eight fifth radiation units, eight sixth radiation units, eight sixth radiation units, eight Seven radiating units and eight eighth radiating units; eight second radiating units are evenly spaced along a circle and surround the outside of the first feeding unit, and any second radiating unit uses the first feeding unit The central axis of the electric unit is that the axis rotates 45 degrees clockwise or counterclockwise, and it will completely coincide with another second radiating unit adjacent to it; each of the second radiating units is an arc copper sheet, eight The inner arc of the second radiating unit is concentric with the first feeding unit, the outer arc of the eight second radiating units is concentric with the first feeding unit, and the eight third radiating units are concentric with the first feeding unit. The circles are evenly spaced and surround the outside of the first feed unit, and any third radiating unit rotates 45 degrees clockwise or counterclockwise with the central axis of the first feed unit as the axis, and the It is completely overlapped with another third radiating unit adjacent to it; each of the third radiating units is an arc copper sheet, and the inner arc surfaces of the eight third radiating units are concentric with the first feeding unit , the outer arc surfaces of the eight third radiating units are concentric with the first feeding unit, the eight third radiating units correspond to the eight second radiating units one by one, and the corresponding one third radiating unit corresponds to one In the second radiating unit, the third radiating unit is located outside the second radiating unit, and both are symmetrical with respect to the same diameter extension line of the first feeding unit; the eight fourth radiating units are along a The circles are evenly spaced and surround the outside of the first feed unit, and any fourth radiating unit rotates 45 degrees clockwise or counterclockwise with the central axis of the first feed unit as the axis, and the Completely coincide with another fourth radiating unit adjacent to it; each of the fourth radiating units is an arc copper sheet, and the inner arc surfaces of the eight fourth radiating units are concentric with the first feeding unit , the outer arc surfaces of the eight fourth radiating units are concentric with the first feeding unit, the eight fourth radiating units correspond to the eight third radiating units one by one, and the corresponding one fourth radiating unit corresponds to one In the third radiating unit, the fourth radiating unit is located outside the third radiating unit, and both of them are symmetrical to the same diameter extension line of the first feeding unit; the eight fifth radiating units The unit is attached to the upper surface of the first layer of dielectric board, eight fifth radiating units are evenly spaced along a circle, and surround the outside of the first feeding unit, and any fifth radiating unit moves clockwise Or turn 45 degrees counterclockwise to completely coincide with another fifth radiating unit adjacent to it; the fifth radiating unit is composed of the first rectangular copper sheet, the first arc copper sheet and the second arc copper sheet , wherein a straight line that makes the two long sides of the first rectangular copper sheet in a symmetrical relationship passes through the center of the first feed unit, and the first rectangular copper sheet is close to the center of the first feed unit A third arc-shaped groove is provided on the end surface, and the first feed unit is embedded in the third arc-shaped groove and is attached to the side wall of the third arc-shaped groove, and the The first circular arc copper sheet is located at one side of a long side of the first rectangular copper sheet, and its starting end is connected with the long side of the first rectangular copper sheet, and the second circular arc The arc-shaped copper sheet is located on one side of the end end of the first arc-shaped copper sheet, the starting end of the second arc-shaped copper sheet is connected to the end end of the first arc-shaped copper sheet, and the The inner arc surface of the first arc copper sheet is concentric with the first feed unit, the outer arc surface of the first arc copper sheet is concentric with the first feed unit, if the The second circular-arc copper sheet can be concentric with the first circular-arc copper sheet by rotating in a clockwise direction with the connection between it and the first circular-arc copper sheet as the axis, wherein the rotation angle is 0° to 90° ; The eight fifth radiation units are located inside the eight second radiation units, the eight fifth radiation units correspond to the eight second radiation units one by one, and one fifth radiation unit corresponds to one second radiation unit, Eight sixth radiating units are attached to the lower surface of the second layer dielectric plate, and the eight sixth radiating units are evenly spaced along a circle, and surround the outside of the first feeding unit, and any one of the sixth The radiating unit rotates 45 degrees clockwise or counterclockwise with the central axis of the first feeding unit, and will completely coincide with another sixth radiating unit adjacent to it; if eight sixth radiating units are projected onto the The upper surface of the first layer of dielectric board, at this time eight sixth radiating units correspond to eight fifth radiating units one by one, and one sixth radiating unit and one fifth radiating unit correspond to the first A diameter extension line of the feeding unit is symmetrical, thus, the eight sixth radiating units and the eight fifth radiating units have 8 symmetry lines, and these 8 symmetry lines are also the symmetry lines of the eight second radiating units, eight The symmetry line of the third radiating unit and the symmetry line of the eight fourth radiating units; the eight seventh radiating units are attached to the upper surface of the first layer dielectric plate, and the eight seventh radiating units are evenly distributed along a circle Distributed at intervals and around the outside of the first feed unit, any seventh radiating unit rotates 45 degrees clockwise or counterclockwise with the central axis of the first feed unit as the axis, and it will The adjacent seventh radiating unit is completely overlapped; each of the seventh radiating units is an arc copper sheet, eight seventh radiating units and eight second radiating units are intersected, and every two adjacent radiating units There is a second radiating unit between the seven radiating units, a seventh radiating unit between every two adjacent second radiating units, and the distance between any adjacent seventh radiating unit and a second radiating unit is equal, The outer arc surfaces of the eight seventh radiating units are concentric with the first feeding unit, the inner arc surfaces of the eight seventh radiating units are concentric with the first feeding unit, and the eight eighth radiating units Attached to the upper surface of the first layer of dielectric board, eight eighth radiating units are evenly spaced along a circle, and surround the outside of the first feeding unit, and any eighth radiating unit is The central axis of the first feed unit is rotated 45 degrees in the clockwise or counterclockwise direction to completely coincide with another eighth radiating unit adjacent to it; each of the eighth radiating units is an arc copper sheet , eight eighth radiating units and eight third radiating units are intersected, there is a third radiating unit between every two adjacent eighth radiating units, and there is an eighth radiating unit between every adjacent two third radiating units Radiating units, the distance between any adjacent eighth radiating unit and a third radiating unit is equal, the outer arc surfaces of the eighth radiating units are concentric with the first feeding unit, and the eighth radiating units The inner arc surface of the unit is concentric with the first feeding unit, eight eighth radiating units correspond to eight seventh radiating units one by one, and one eighth radiating unit corresponds to one seventh radiating unit , the eighth radiation unit is located outside the seventh radiation unit.