CN116526159A - THz double-frequency transmission array antenna - Google Patents
THz double-frequency transmission array antenna Download PDFInfo
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/0006—Particular feeding systems
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/02—Refracting or diffracting devices, e.g. lens, prism
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
- H01Q3/30—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/20—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements characterised by the operating wavebands
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Abstract
The invention relates to the technical field of wireless communication and discloses a THz dual-frequency transmission array antenna, which comprises a feed source and a transmission assembly, wherein the transmission assembly comprises a dielectric substrate with a metal layer on one side surface, and a first transmission array and a second transmission array formed by a plurality of through holes are arranged on the metal layer; the first transmission array comprises a first transmission unit formed by M multiplied by N cross holes so as to transmit the electromagnetic waves of the first frequency band, and the length L of the first transmission unit is adjusted so that the first transmission unit generates a preset phase compensation value for the electromagnetic waves of the first frequency band; the second transmission array comprises m multiplied by n second transmission units formed by concentric round holes and circular ring holes so as to transmit the electromagnetic waves of the second frequency band, and the radius r of the round holes is adjusted so that the second transmission units can generate a preset phase compensation value for the electromagnetic waves of the second frequency band; the first transmission units and the second transmission units are arranged on the medium substrate in a staggered mode. By adjusting the phase compensation values of the respective transmission units, the transmitted electromagnetic waves can be deflected to achieve a desired beam shape.
Description
Technical Field
The invention relates to the technical field of wireless communication, in particular to a THz dual-frequency transmission array antenna.
Background
The next generation of wireless communication systems are not limited to ground-to-ground communication, and space-to-ground integrated communication processes have become an inevitable trend, and 6G technology plays an indispensable role in the processes. Compared with satellite communication in an X band, a Ku band and the like with lower frequency, 6G THz communication is attracting attention due to the advantages of wide bandwidth, high gain, small size and the like. High gain and multi-beam antennas have attracted attention by researchers due to their practical value in communication applications and radar systems, and in recent years, many super-surface based high gain and multi-beam antennas have emerged. Most of the current research on single-band high-gain transmission array antennas can realize frequency bands and functions, so that THz transmission arrays generally need the antennas to have multi-band and multi-function characteristics. Therefore, it has become a necessary trend to design a dual-band multifunctional antenna that meets THz frequency band requirements.
Disclosure of Invention
The invention aims to provide a THz dual-frequency transmission array antenna, wherein a transmission component can deflect the phases of electromagnetic waves of two frequency bands emitted by a feed source, and the electromagnetic waves of the transmitted frequency bands can be deflected by adjusting the phase compensation value of each transmission unit in the transmission component so as to achieve the required beam shape.
In order to achieve the above purpose, the invention provides a THz dual-frequency transmission array antenna, which comprises a feed source and a transmission component, wherein the transmission component comprises a dielectric substrate with a metal layer on one side surface, and a first transmission array and a second transmission array formed by a plurality of through holes are arranged on the metal layer; the first transmission array comprises M multiplied by N first transmission units which are periodically arranged and formed by cross holes and are used for transmitting the first frequency band electromagnetic waves emitted by the feed source, and the length L of each first transmission unit is adjusted so that the first transmission units can generate preset phase compensation values for the first frequency band electromagnetic waves; the second transmission array comprises m multiplied by n second transmission units which are periodically arranged and are used for transmitting the second frequency band electromagnetic waves emitted by the feed source, the second transmission units comprise concentric circular holes and circular holes, and the radius r of each circular hole is adjusted to enable the second transmission units to generate preset phase compensation values for the second frequency band electromagnetic waves; the first transmission units and the second transmission units are arranged on the medium substrate in a staggered mode.
Preferably, each end of the cross-shaped aperture is provided with an arcuate aperture.
Preferably, the said transparentThe shooting component comprises four dielectric substrates, each dielectric substrate is provided with a first transmission array and a second transmission array which are opposite to each other, and the distance between adjacent dielectric substrates is D, D=lambda 0 /2；λ 0 The wavelength corresponding to the central frequency electromagnetic wave of the higher frequency band in the first frequency band and the second frequency band; the phase compensation value of the transmitted electromagnetic waves of the first frequency band after the superposition of the first transmission units in the four opposite dielectric substrates is P 1 ，P 1 The relation with L is: p (P) 1 ＝a 1 sin(b 1 L+c 1 ) The method comprises the steps of carrying out a first treatment on the surface of the The phase compensation value of the transmitted electromagnetic waves of the second frequency band after the superposition of the second transmission units in the four opposite dielectric substrates is P 2 ，P 2 The relation with r is P 2 ＝d 1 r+e 1 The method comprises the steps of carrying out a first treatment on the surface of the Wherein a is 1 ∈(323,526)，b 1 ∈(0.004,0.01)，c 1 ∈(13.8,18.6)，d 1 ∈(-3,-2.3)，e 1 E (410.7,530.3), and L and r are each in μm.
Preferably, a 1 ＝424，b 1 ＝0.007，c 1 ＝16.2，d 1 ＝-2.66，e 1 ＝470.5。
Preferably, the transmission assembly includes three dielectric substrates, each of the dielectric substrates is provided with a first transmission array and a second transmission array which are opposite to each other, and the distance between adjacent dielectric substrates is D, d=λ 0 /2；λ 0 The wavelength corresponding to the central frequency electromagnetic wave of the high frequency band in the first frequency band and the second frequency band; the phase compensation value of the electromagnetic waves of the first frequency band transmitted after the superposition of the first transmission units which are opposite to each other in the three dielectric substrates is P 3 ，P 3 The relation with L is: p (P) 3 ＝a 2 sin(b 2 L+c 2 ) The method comprises the steps of carrying out a first treatment on the surface of the The phase compensation value of the electromagnetic waves of the second frequency band transmitted after the superposition of the second transmission units which are opposite to each other in the three dielectric substrates is P 4 ，P 4 The relation with r is: p (P) 4 ＝d 2 r+e 2 The method comprises the steps of carrying out a first treatment on the surface of the Wherein a is 2 ＝401.5，b 2 ＝0.004，c 2 ＝18.5，d 2 ＝-1.7，e 2 ＝55.3，And W and r are each in μm.
Preferably, the angle of the electromagnetic wave transmitted by the end of each transmission unit of the transmission assembly isThe relation between the phase compensation value P and each transmission unit is as follows:
in (x) 0 ,y 0 ,z 0 ) For the coordinates of the feed, (x) i ,y j ) Coordinates d of the transmission unit of the ith row and the jth column ij K is the distance between each transmission unit and the feed source 0 ＝2π/λ C θ is the pitch angle,Is azimuth.
Preferably, for the first transmissive array, θ=0,for the second transmissive matrix, θ= ±20,>
preferably, the first transmission array is used for transmitting electromagnetic waves in the 90GHz frequency band; the second transmission array is used for transmitting electromagnetic waves in the 140GHz frequency band.
Preferably, m=n=m=n=21.
Preferably, the antenna has a focal diameter ratio of 0.85.
According to the description and practice, the THz dual-frequency transmission array antenna of the invention respectively radiates electromagnetic waves of two different frequency bands by arranging two transmission arrays in the transmission assembly, and on the premise that the position of the feed source and the position of each transmission unit are determined, the phase compensation value of the transmission units in each transmission array can be adjusted by adjusting the sizes of the transmission units in each transmission array, so that the transmission array can be used for forming electromagnetic waves with required wave beam shapes, thereby being suitable for different application scenes.
Drawings
Fig. 1 is a schematic structural diagram of a THz dual-frequency transmission array antenna according to an embodiment of the present invention.
Fig. 2 is a graph of the distribution of a first transmissive array and a second transmissive array on a dielectric substrate of a THz dual-frequency transmissive array antenna according to an embodiment of the present invention.
Fig. 3 is an enlarged view of a portion a in fig. 2.
Fig. 4 is a graph showing phase compensation values of the transmitted electromagnetic waves by four first transmission units facing each other with respect to the length L thereof when the THz dual-frequency transmission array antenna according to an embodiment of the present invention has four dielectric substrates.
Fig. 5 is a graph of phase compensation values of the transmitted electromagnetic waves by the four second transmission units facing each other with respect to the radius r of the circular hole of the THz dual-frequency transmission array antenna according to an embodiment of the present invention when the THz dual-frequency transmission array antenna has four dielectric substrates.
Fig. 6 is a graph of transmission coefficients of a THz dual-frequency transmission array antenna at different frequencies according to an embodiment of the present invention.
Fig. 7 is a graph of peak gain at different frequencies for a THz dual-frequency transmissive array antenna in accordance with one embodiment of the present invention.
Fig. 8 is a pattern at 90GHz for a THz dual-frequency transmissive array antenna according to an embodiment of the present invention.
Fig. 9 is a pattern at 140GHz for a THz dual-frequency transmissive array antenna according to an embodiment of the present invention.
The reference numerals in the figures are:
1. a feed source; 2. a transmissive assembly; 31. a first transmission unit; 32. a second transmission unit; 41. a cross hole; 42. a circular arc hole; 43. a circular ring hole; 44. a round hole; 5. a dielectric substrate; 6. a metal layer.
Detailed Description
Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments may be embodied in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
Furthermore, the drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus a repetitive description thereof will be omitted. In the present disclosure, the terms "comprising," "including," "having," "disposed in" and "having" are intended to be open-ended and mean that there may be additional elements/components/etc. in addition to the listed elements/components/etc.; the terms "first," "second," and the like, are used merely as labels, and do not limit the number or order of their objects; the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like refer to an orientation or positional relationship based on that shown in the drawings, merely for convenience of description and to simplify the description, and do not denote or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the invention.
Unless specifically stated or limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In this embodiment, a THz dual-frequency transmission array antenna is disclosed, and fig. 1 shows a three-dimensional structure of the THz dual-frequency transmission array antenna. Fig. 2 shows a top view structure of a dielectric substrate of the THz dual-frequency transmission array antenna, wherein the distribution condition of the first transmission array and the second transmission array is included. Fig. 3 shows an enlarged structure of the portion a in fig. 2, showing in detail the specific structure of the first transmissive array and the second transmissive array.
Referring to fig. 1-3, the THz dual-frequency transmission array antenna in this embodiment includes a feed source 1 and a transmission component 2, where the transmitting end of the feed source 1 faces the center of the transmission component 2. The transmission assembly 2 comprises a dielectric substrate 5 with a metal layer 6 arranged on one side surface, and a first transmission array and a second transmission array formed by a plurality of through holes are arranged on the metal layer 6 and are respectively used for transmitting electromagnetic waves in different frequency bands.
The first transmission array includes m×n first transmission units 31 periodically arranged, where each first transmission unit 31 is a cross hole 41 penetrating through the metal layer 6, and is configured to transmit the first frequency band electromagnetic wave emitted by the feed source 1, and generate a certain phase compensation value for the first frequency band electromagnetic wave. The length of the first transmission unit 31 is L, that is, the left-right length and the up-down length of the cross hole 41 in fig. 3 are L; the width of the body of the first transmission unit 31 is W 0 I.e. the cross hole 41 has a width W 0 。W 0 The value of (2) is a preset fixed value, i.e. the width of the body of each first transmission unit 31 is the same, the value range of the value is determined according to the frequency of the transmitted electromagnetic wave, and the value can be specifically between 0.1mm and 0.2mm according to the actual requirement, in this embodiment, W 0 =0.12 mm. Adjusting the L value of each first transmission unit 31 may enable the first transmission unit 31 to generate a preset phase compensation value for the electromagnetic wave of the first frequency band. In other words, the phase compensation value of the cross hole 41 to the electromagnetic wave of the first frequency band can be controlled by controlling the size of the cross hole. Thereafter, m×n first transmission units 31 may be formed into an array, and by controlling the phase compensation values of different units in the array, it is possible to deflect electromagnetic waves passing therethrough by a desired angle to form a transmission beam of a desired shape.
The second transmissive array comprises m×n second transmission units 32, which are periodically arranged, are used for transmitting the second frequency band electromagnetic wave emitted by the feed source 1 and generating a certain phase compensation value for the second frequency band electromagnetic wave. Each first transmissive unit 31 comprises concentric circular holes 44 and circular holes 43, the circular holes 44 and circular holes 43 penetrating the metal layer 6. The outer diameter of the circular ring hole 43 is a preset fixed value R 0 The distance between the circular hole 44 and the circular hole 43 is a preset fixed value L 0 I.e. R in each second transmissive unit 32 0 And L 0 Are all fixed. The R is 0 And L 0 The value range of the value depends on the frequency of the transmitted electromagnetic wave, and can be specifically determined according to the actual requirement, R 0 Take value between 0.5mm and 1mm, L 0 Take a value between 0.05mm and 0.1mm, R in this example 0 ＝0.64mm，L 0 =0.08 mm. The radius of the circular hole 44 is r, and the r value of each second transmission unit 32 is adjusted to enable the second transmission unit 32 to generate a preset phase compensation value for the electromagnetic wave of the second frequency band. In other words, the phase compensation value of the second transmission unit 32 for the electromagnetic wave of the second frequency band can be controlled by controlling the size of the circular hole 44. Thereafter, m×n second transmission units 32 may be formed into an array, and by controlling the phase compensation values of the different units in the array, it is possible to deflect electromagnetic waves passing therethrough by a desired angle to form a transmission beam of a desired shape.
Meanwhile, in the embodiment, the first transmission units 31 and the second transmission units 32 are alternately arranged on the medium substrate 5, and the transmitting end of the feed source 1 faces the center of the transmission component 2, so that most electromagnetic waves emitted by the feed source 1 can be radiated on the first transmission array and the second transmission array, and corresponding beam offset is realized as required.
Since the position of the feed source 1, the positions of the respective first transmission units 31 and second transmission units 32 are determined, the incident phase of the electromagnetic wave emitted from the feed source 1 to each transmission unit is determined, and thus the transmitted electromagnetic wave of a desired phase can be obtained by changing the phase compensation value of the transmitted electromagnetic wave by the respective transmission units. That is, a transmission beam of a desired shape can be obtained by controlling the phase compensation values of the respective transmission units, which can improve the signal intensity within a certain range for a transmission array having a beam focusing effect. And the antenna is provided with two transmission arrays in a staggered way, and is used for radiating electromagnetic waves of two different frequency bands, and the electromagnetic waves of the two frequency bands can generate beam deviation effect. The basic structure of the antenna is provided above, and the parameters can be timely adjusted according to the required beam offset angle in practical application so as to achieve the optimal radiation effect.
In addition, in this embodiment, each end portion of each cross hole 41 is provided with an arc hole 42, so that on one hand, the transmission coefficient of the first transmission array for the electromagnetic waves of the first frequency band can be improved, more electromagnetic waves can be transmitted, and a better transmission effect can be achieved; on the other hand, the phase compensation value of the electromagnetic wave of the first frequency band by the single first transmission unit 31 can be improved, and a larger range of phase compensation values can be obtained when the value of L is adjusted.
Specifically, in this embodiment, the transmission assembly 2 includes four dielectric substrates 5 in total, each dielectric substrate 5 is provided with a first transmission array and a second transmission array, the first transmission arrays on adjacent dielectric substrates 5 are disposed opposite to each other, and the second transmission arrays on adjacent dielectric substrates 5 are disposed opposite to each other, that is, the shapes and sizes of the four transmission units in the four dielectric substrates 5 are the same. The first transmission array is used for transmitting electromagnetic waves in the 90GHz frequency band; the second transmission array is used for transmitting electromagnetic waves in the 140GHz frequency band. Four opposite transmission units can form a transmission unit cell, and the transmission unit cell can realize the phase compensation range of electromagnetic waves exceeding 360 DEG when the size of each transmission unit is adjusted. For example, by adjusting the L values of the four opposing first transmission units 31 at the same time, a phase compensation value exceeding 360 ° can be generated for the first-band electromagnetic wave signal, and thus a transmission beam having a single beam, a dual beam, a four beam, or the like can be realized. Similarly, the r values of the four opposite second transmission units 32 are adjusted simultaneously, so that a phase compensation value exceeding 360 degrees can be generated for the electromagnetic wave signals in the second frequency band, and transmission beams in shapes of single beam, double beam, four beams and the like can be realized.
Specifically, four media basesThe spacing between adjacent two of the plates 5 is D, d=λ 0 /2；λ 0 The wavelength corresponding to the electromagnetic wave with the center frequency of the higher frequency band in the first frequency band and the second frequency band. The phase compensation value of the first transmission unit 31 for the transmitted electromagnetic wave of the first frequency band is P 1 ，P 1 The relation with L is: p (P) 1 ＝a 1 sin(b 1 L+c 1 ) The method comprises the steps of carrying out a first treatment on the surface of the The phase compensation value of the second transmission unit 32 for the transmitted electromagnetic wave of the second frequency band is P 2 ，P 2 The relation with r is P 2 ＝d 1 r+e 1 The method comprises the steps of carrying out a first treatment on the surface of the Wherein a is 1 ∈(323,526)，b 1 ∈(0.004,0.01)，c 1 ∈(13.8,18.6)，d 1 ∈(-3,-2.3)，e 1 E (410.7,530.3), wherein the units of L and r are μm, the value range of L is 820 μm-960 μm, and the value range of r is 120 μm-220 μm. At the same time, a is given above 1 、b 1 、c 1 、d 1 、e 1 Is a value within the range, P is the same under L 1 The error of the value of (2) is not more than 5%, P is the same r 2 The error of the value of (2) is not more than 5%.
In this embodiment, a 1 ＝424，b 1 ＝0.007，c 1 ＝16.2，d 1 ＝-2.66，e 1 =470.5, correspondingly, P is shown in fig. 4 at different r values 1 Relationship with L, wherein the ordinate is the phase compensation value P 1 It can be seen that P varies with r 1 The relationship with L is substantially the same, i.e. the dimensional change of the second transmission unit 32 does not have a significant effect on the phase compensation value of the first transmission unit 31. Meanwhile, in the above range of values, it is possible to ensure that the first transmission unit 31 realizes a phase compensation value exceeding 360 ° for the transmitted electromagnetic wave. P is shown in FIG. 5 at different L values 2 Relation to r, wherein the ordinate is the phase compensation value P 2 It can be seen that as L changes, P 2 The relation with r is substantially the same, i.e. the change in size of the first transmissive element 31 does not have a significant effect on the phase compensation value of the second transmissive element 32. At the same time, r is within the above range, so that the second transmission unit 32 can be ensured to realize super-transmission of the transmitted electromagnetic waveA phase compensation value of 360 deg.. Therefore, the first transmission unit 31 and the second transmission unit 32 have higher independence, and can generate phase compensation values exceeding 360 degrees for electromagnetic waves of transmitted frequency bands, so that a transmission array is formed conveniently, and electromagnetic waves with required beam shapes are transmitted, so that the method is suitable for different application scenes.
After determining the phase compensation value required by a certain first transmissive unit 31, the formula P can be followed 1 ＝a 1 sin(b 1 L+c 1 ) A specific length L of the first transmission unit 31 is calculated. After determining the phase compensation value required by a certain second transmissive unit 32, the formula P can be followed 2 ＝d 1 r+e 1 The specific radius r of the circular hole 44 in the second transmissive unit 32 is calculated. In the process of designing the antenna, the positions of the respective transmission units and the incident angles of the electromagnetic waves incident thereon are known, and the transmission angles of the respective transmission units are also fixed for the electromagnetic waves of the transmission beam of a specific shape, so that the phase compensation value to be achieved by each transmission unit can be calculated as required. So after the phase compensation value of each transmission unit is determined, the method can be according to formula P 1 ＝a 1 sin(b 1 L+c 1 ) And formula P 2 ＝d 1 r+e 1 And calculating to obtain each L value and each r value.
In addition, W 0 P when the value of (2) is fixed 1 The value of (2) is related to L only; r is R 0 And L 0 P when the value of (2) is fixed 2 The value of (2) is related to r only. So only W is given in the present application 0 、R 0 And L 0 In practical application, specific values of the parameters can be set in the value range according to known parameters such as antenna size, transmission unit number and the like.
Further, in this embodiment, a calculation formula of the phase compensation value P of each transmission unit is also given, where P represents the phase compensation value of each first transmission unit 31 and each second transmission unit 32, that is, the formula is applied to both the first transmission unit 31 and the second transmission unit 32. The phase compensation valueP is at an angle to electromagnetic waves transmitted from the ends of the respective transmission unitsAnd (5) correlation. In particular, the method comprises the steps of,
in (x) 0 ,y 0 ,z 0 ) Is the coordinates of feed 1, (x) i ,y j ) Coordinates, d, of the transmission unit of the ith row and the jth column ij For the distance between each transmission unit and the feed source 1, the plane in which each transmission unit is located is set to be a plane with z=0 in the spatial coordinate system for simplifying the calculation.For the angle of the electromagnetic wave transmitted by each of the first transmission unit 31, the second transmission unit 32, when the desired beam shape is determined, +.>Again a fixed value. Wherein θ is pitch angle, < >>Is azimuth. k (k) 0 ＝2π/λ C ，λ C Is the wavelength of the electromagnetic wave at the operating frequency. For the first transmission unit 31, lambda C A wavelength of an electromagnetic wave having a frequency of 90 GHz; for the second transmission unit 3242, lambda C Is the wavelength of electromagnetic waves at a frequency of 140 GHz. i and j are natural numbers greater than 0, i.ltoreq.M, j.ltoreq.N for the first transmissive array and i.ltoreq.m, j.ltoreq.n for the second transmissive array.
Further, in this embodiment, the first transmissive array is designed such that the transmitted electromagnetic waves are in a focused single beam shape, which can improveLocal range of signal intensity, good point-to-point communication is realized, and the transmission angle of each first transmission unit 31 isWherein: θ=0°, ->From this, the L value in each first transmission unit 31 can be calculated. The second transmissive array is designed to transmit electromagnetic waves in the shape of dual beams for point-to-multi communication, and each second transmissive unit 32 has a transmission angle of +>Wherein: θ= ±20°, ∈ ->From this, the r value in each second transmission unit 32 can be calculated.
More specifically, in this embodiment, m=n=20, and m=n=20. Namely, 20 rows and 20 columns of first transmission units 31 are arranged in each first transmission array; each second transmissive array is provided with 20 rows and 20 columns of second transmissive units 32. In addition, in this embodiment, each second transmission unit 32 is located at an intermediate position of four adjacent first transmission units 31 while each row of first transmission units 31 and adjacent row of second transmission units 32 are not in the same line, and each column of first transmission units 31 and adjacent column of second transmission units 32 are not in the same line. The structure can realize that more transmission units are distributed on the medium substrate 5 with smaller area, and meanwhile, the adjacent transmission units have lower mutual coupling effect. In other embodiments, the number of the first transmission units 31 and the second transmission units 32 can be changed in time according to the given antenna size, which can also achieve the above-mentioned effects.
Referring to fig. 6, the THz dual-frequency transmission array antenna with the structural form is shown, and the transmission coefficients of electromagnetic waves with different frequencies are higher than-2 dB in two frequency bands of 90GHz and 140GHz, so that the THz dual-frequency transmission array antenna has lower signal transmission loss. Fig. 7 shows the peak gain of the antenna at different frequencies, and it can be seen that the peak gain of the antenna at 90GHz band is higher than 18.5dBi, the peak gain at 140GHz band is higher than 24.5dBi, and the 1-dB gain in both bands is about 9%, so that the antenna has a wider bandwidth. I.e. the antenna has a higher gain and a wider bandwidth while having lower losses.
Fig. 8 shows the antenna pattern at 90GHz and fig. 9 shows the antenna pattern at 140GHz, from which it can be seen that the antenna achieves good focusing and dual beam effects in the two frequency bands.
In another embodiment, the transmission assembly 2 includes three dielectric substrates 5, each dielectric substrate 5 is provided with a first transmission array and a second transmission array, the first transmission arrays on adjacent dielectric substrates 5 are disposed opposite to each other, and the second transmission arrays on adjacent dielectric substrates 5 are disposed opposite to each other, that is, the shapes and sizes of the four transmission units opposite to each other in the four dielectric substrates 5 are the same. The first transmission array is used for transmitting electromagnetic waves in the 90GHz frequency band; the second transmission array is used for transmitting electromagnetic waves in the 140GHz frequency band. The three transmission units are combined together, and when the size of the transmission units is adjusted, the phase compensation range of electromagnetic waves can be about 200 degrees, so that the electromagnetic waves can be cheaply generated at a certain angle, and finally, the beams with the required shapes can be achieved.
Specifically, the pitch of two adjacent dielectric substrates 5 is D, d=λ 0 /2；λ 0 The first frequency band and the second frequency band are wavelengths corresponding to the central frequency electromagnetic wave of the high frequency band. The phase compensation value of the first transmission unit 31 for the transmitted electromagnetic wave of the first frequency band is P 3 ，P 3 The relation with L is: p (P) 3 ＝a 2 sin(b 2 L+c 2 ) The method comprises the steps of carrying out a first treatment on the surface of the The phase compensation value of the second transmission unit 32 for the transmitted electromagnetic wave of the second frequency band is P 4 ，P 4 The relation with r is P 4 ＝d 2 r+e 2 The method comprises the steps of carrying out a first treatment on the surface of the Wherein a is 2 ＝401.5，b 2 ＝0.004，c 2 ＝18.5，d 2 ＝-1.7，e 2 =55.3, and units of L and r are μm, and the value of L ranges from 820 μm to 960 μmThe value range of m and r is 120-220 μm.
In other words, when the angular deflection of the electromagnetic wave is smaller, the phase compensation value can be achieved to a corresponding extent only by fewer dielectric substrates 5 and transmission units thereon, so that the number of the dielectric substrates 5 and the transmission units in the transmission assembly 2 can be reduced appropriately, and corresponding functions can be achieved at minimum cost.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (10)
1. The THz dual-frequency transmission array antenna is characterized by comprising a feed source and a transmission assembly, wherein the transmission assembly comprises a dielectric substrate with a metal layer on one side surface, and a first transmission array and a second transmission array formed by a plurality of through holes are arranged on the metal layer;
the first transmission array comprises M multiplied by N first transmission units which are periodically arranged and formed by cross holes and are used for transmitting the first frequency band electromagnetic waves emitted by the feed source, and the length L of each first transmission unit is adjusted so that the first transmission units can generate preset phase compensation values for the first frequency band electromagnetic waves;
the second transmission array comprises m multiplied by n second transmission units which are periodically arranged and are used for transmitting the second frequency band electromagnetic waves emitted by the feed source, the second transmission units comprise concentric circular holes and circular holes, and the radius r of each circular hole is adjusted to enable the second transmission units to generate preset phase compensation values for the second frequency band electromagnetic waves;
the first transmission units and the second transmission units are arranged on the medium substrate in a staggered mode.
2. The THz dual-band transmission array antenna of claim 1, wherein,
each end of the cross hole is provided with an arc hole.
3. The THz dual-band transmission array antenna of claim 1, wherein,
the transmission assembly comprises four dielectric substrates, each dielectric substrate is provided with a first transmission array and a second transmission array which are opposite to each other, and the distance between adjacent dielectric substrates is D, D=lambda 0 /2；λ 0 The wavelength corresponding to the central frequency electromagnetic wave of the higher frequency band in the first frequency band and the second frequency band;
the phase compensation value of the transmitted electromagnetic waves of the first frequency band after the superposition of the first transmission units in the four opposite dielectric substrates is P 1 ，P 1 The relation with L is: p (P) 1 ＝a 1 sin(b 1 L+c 1 )；
The phase compensation value of the transmitted electromagnetic waves of the second frequency band after the superposition of the second transmission units in the four opposite dielectric substrates is P 2 ，P 2 The relation with r is P 2 ＝d 1 r+e 1 ；
Wherein a is 1 ∈(323,526)，b 1 ∈(0.004,0.01)，c 1 ∈(13.8,18.6)，d 1 ∈(-3,-2.3)，e 1 E (410.7,530.3), and L and r are each in μm.
4. The THz dual-band transmission array antenna of claim 3,
a 1 ＝424，b 1 ＝0.007，c 1 ＝16.2，d 1 ＝-2.66，e 1 ＝470.5。
5. the THz dual-band transmission array antenna of claim 1, wherein,
the transmission assembly includes three componentsThe dielectric substrates are provided with the first transmission array and the second transmission array which are opposite to each other, and the distance between the adjacent dielectric substrates is D, D=lambda 0 /2；λ 0 The wavelength corresponding to the central frequency electromagnetic wave of the high frequency band in the first frequency band and the second frequency band;
the phase compensation value of the electromagnetic waves of the first frequency band transmitted after the superposition of the first transmission units which are opposite to each other in the three dielectric substrates is P 3 ，P 3 The relation with L is: p (P) 3 ＝a 2 sin(b 2 L+c 2 )；
The phase compensation value of the electromagnetic waves of the second frequency band transmitted after the superposition of the second transmission units which are opposite to each other in the three dielectric substrates is P 4 ，P 4 The relation with r is: p (P) 4 ＝d 2 r+e 2 ；
Wherein a is 2 ＝401.5，b 2 ＝0.004，c 2 ＝18.5，d 2 ＝-1.7，e 2 =55.3, and W and r are each in μm.
6. The THz dual-frequency transmission array antenna according to any one of claims 1 to 5,
the angle of the electromagnetic wave transmitted by the tail end of each transmission unit of the transmission assembly isThe relation between the phase compensation value P and each transmission unit is as follows:
in (x) 0 ,y 0 ,z 0 ) For the coordinates of the feed, (x) i ,y j ) Is the ith rowCoordinates, d, of the transmissive element in column j ij K is the distance between each transmission unit and the feed source 0 ＝2π/λ C θ is the pitch angle,Is azimuth.
7. The THz dual-band transmission array antenna of claim 6, wherein,
for the first transmissive array, θ=0,
for the second transmissive array, θ= ±20,
8. the THz dual-band transmission array antenna of claim 7,
the first transmission array is used for transmitting electromagnetic waves in the 90GHz frequency band;
the second transmission array is used for transmitting electromagnetic waves in the 140GHz frequency band.
9. The THz dual-band transmission array antenna of claim 6, wherein,
M＝N＝m＝n＝21。
10. the THz dual-band transmission array antenna of claim 6, wherein,
the ratio of the focal diameter of the antenna is 0.85.
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| CN116914443A (en) * | 2023-09-14 | 2023-10-20 | 深圳市齐奥通信技术有限公司 | Dual-frequency beam scanning transmission array antenna |
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| CN116914443A (en) * | 2023-09-14 | 2023-10-20 | 深圳市齐奥通信技术有限公司 | Dual-frequency beam scanning transmission array antenna |
| CN116914443B (en) * | 2023-09-14 | 2024-01-02 | 深圳市齐奥通信技术有限公司 | Dual-frequency beam scanning transmission array antenna |
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