CN108879089B - Sector wide beam receiving and transmitting antenna - Google Patents
Sector wide beam receiving and transmitting antenna Download PDFInfo
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- CN108879089B CN108879089B CN201810510358.7A CN201810510358A CN108879089B CN 108879089 B CN108879089 B CN 108879089B CN 201810510358 A CN201810510358 A CN 201810510358A CN 108879089 B CN108879089 B CN 108879089B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/27—Adaptation for use in or on movable bodies
- H01Q1/32—Adaptation for use in or on road or rail vehicles
- H01Q1/3208—Adaptation for use in or on road or rail vehicles characterised by the application wherein the antenna is used
- H01Q1/3233—Adaptation for use in or on road or rail vehicles characterised by the application wherein the antenna is used particular used as part of a sensor or in a security system, e.g. for automotive radar, navigation systems
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
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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
- H01Q15/14—Reflecting surfaces; Equivalent structures
- H01Q15/145—Reflecting surfaces; Equivalent structures comprising a plurality of reflecting particles, e.g. radar chaff
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
- H01Q19/10—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces
- H01Q19/104—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces using a substantially flat reflector for deflecting the radiated beam, e.g. periscopic antennas
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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
- H01Q21/0075—Stripline fed arrays
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/29—Combinations of different interacting antenna units for giving a desired directional characteristic
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- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Computer Security & Cryptography (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Waveguide Aerials (AREA)
Abstract
The invention discloses a sector wide-beam transceiver antenna, which comprises a transmitting antenna and a receiving antenna. The transmitting antenna comprises a transmitting reflecting layer and a transmitting radiation layer which are arranged at intervals; the emission reflecting layer is composed of an emission reflecting medium substrate, an emission guiding metal patch array and an emission reflecting metal strip; the radiation emitting layer is composed of a radiation emitting metal floor, a radiation emitting medium substrate and a radiation emitting unit. The receiving antenna comprises a receiving reflecting layer and a receiving radiation layer which are arranged at intervals; the receiving reflection layer is composed of a receiving reflection medium substrate and a receiving reflection metal strip; the radiation receiving layer is composed of a metal receiving floor, a radiation receiving medium substrate and a radiation receiving unit. The transmitting antenna and the receiving antenna have simple structures and are easy to process, the sector wide beams of the transmitting antenna and the receiving antenna in the horizontal plane are realized, the narrow beams are realized in the pitching plane, the gain and the beam width meet the requirements of the vehicle-mounted angle radar, and the method is suitable for the vehicle-mounted angle radar.
Description
Technical Field
The invention relates to the technical field of antennas, in particular to a sector wide-beam transceiver antenna.
Background
Autopilot technology is an emerging technology and is also a trend in the development of automobile safety technology in the future. The vehicle millimeter wave radar is a key component of an automatic driving automobile. The vehicle millimeter wave radar which has been put into the market is mostly a forward radar for detecting forward medium-distance and long-distance targets, while the video and infrared radar can only detect short-distance or ultra-short-distance targets, has short detection distance, is easily influenced by bad weather such as rain and snow, and cannot work all the day. Aiming at blind area detection and lane changing assistance, a millimeter wave radar is required to be used for realizing high precision, and meanwhile, an antenna is required to be wide enough for realizing beam coverage of a wide-range blind area. The prior art searches and finds that the wide-beam antenna for the vehicle-mounted radar has some defects, for example, a practical patent with publication number of CN206758645U discloses a 'wide-beam antenna structure', the antenna uses a plurality of parasitic components to realize the widening of beams, and although the antenna gain is large enough, the beam width cannot meet the requirement of the vehicle-mounted angular radar, the maximum gain direction of the antenna cannot be offset, and the structure is complex.
Disclosure of Invention
The invention provides a sector wide beam receiving and transmitting antenna, which aims at solving the problems that the beam width of the existing antenna is not wide enough and the requirements of wide beam and gain of a vehicle-mounted angle radar cannot be met.
In order to solve the problems, the invention is realized by the following technical scheme:
a fan-shaped wide beam transceiver antenna comprises a transmitting antenna and a receiving antenna.
The transmitting antenna comprises a transmitting reflecting layer and a transmitting radiation layer which are arranged at intervals;
the emission reflecting layer is composed of an emission reflecting medium substrate, an emission guiding metal patch array and an emission reflecting metal strip; the emission guiding metal patch array and the emission reflecting metal strip are simultaneously arranged on the surface of one side of the emission reflecting medium substrate facing the emission radiation layer, and the emission guiding metal patch array and the emission reflecting metal strip are respectively positioned at two sides of the longitudinal central line of the emission reflecting medium substrate; the emission guiding metal patch array comprises a plurality of rectangular emission guiding metal patches which are distributed at equal intervals along the longitudinal direction of the emission reflecting medium substrate, and the longitudinal central lines of all the emission guiding metal patches coincide; the emission and reflection metal strip is in a rectangular strip shape and extends to the edge of the reflection medium substrate along the two ends of the longitudinal direction of the emission and reflection medium substrate;
the radiation emitting layer is composed of a radiation emitting metal floor, a radiation emitting medium substrate and a radiation emitting unit; the size of the emission metal substrate and the surface of one side of the emission radiation medium substrate far away from the emission reflecting layer are equal; the radiation emitting unit is arranged on one side surface of the radiation emitting medium substrate facing the radiation emitting reflecting layer and positioned on one side of the longitudinal midline of the radiation emitting medium substrate; the transmitting radiation unit comprises a transmitting microstrip feeder line, a transmitting radiation metal patch array and a transmitting microstrip matching section; the radiation-emitting metal patch array comprises a plurality of rectangular radiation-emitting metal patches which are distributed at equal intervals along the longitudinal direction of the radiation-emitting medium substrate, and the longitudinal central lines of all the radiation-emitting metal patches are coincident; the longitudinal center line of the transmitting microstrip matching section coincides with the longitudinal center line of the transmitting radiation metal patch array, and one end of the transmitting microstrip matching section in the longitudinal direction extends to the edge of the transmitting radiation medium substrate; the strip-shaped transmitting microstrip feeder connects all transmitting radiation metal patches and transmitting microstrip matching sections in series;
the receiving antenna comprises a receiving reflecting layer and a receiving radiation layer which are arranged at intervals;
the receiving reflection layer is composed of a receiving reflection medium substrate and a receiving reflection metal strip; the receiving reflection metal strip is arranged on one side surface of the receiving reflection medium substrate facing the receiving radiation layer, and the longitudinal center line of the receiving reflection metal strip coincides with the longitudinal center line of the receiving reflection medium substrate; the receiving reflection metal strip is rectangular and strip-shaped, and extends to the edge of the receiving reflection medium substrate along the longitudinal direction of the receiving reflection medium substrate;
the radiation receiving layer is composed of a metal receiving floor, a radiation receiving medium substrate and a radiation receiving unit; the size of the receiving metal substrate is the same as that of the receiving radiation medium substrate, and the receiving radiation medium substrate is covered on one side surface far away from the receiving reflection layer; the receiving radiation unit is arranged on one side surface facing the receiving reflection layer, and the longitudinal center line of the receiving radiation unit coincides with the longitudinal center line of the receiving radiation medium substrate; the receiving radiation unit comprises a receiving microstrip feeder line, a receiving radiation metal patch array and a receiving microstrip matching section; the radiation receiving metal patch array comprises a plurality of radiation receiving metal patches which are distributed at equal intervals along the longitudinal direction of the radiation receiving medium substrate, and the longitudinal central lines of all the radiation receiving metal patches are coincident; the longitudinal center line of the receiving microstrip matching section coincides with the longitudinal center line of the receiving radiation metal patch array, and one end of the longitudinal direction of the receiving microstrip matching section extends to the edge of the receiving radiation medium substrate; and the long-strip receiving microstrip feeder lines connect all receiving radiation metal patches and the receiving microstrip matching sections in series.
In the scheme, the longitudinal lengths of all the emission guiding metal patches are the same; in the longitudinal arrangement direction of the emission guide metal patches, the emission guide metal patches located at the middle have the largest transverse width, and the emission guide metal patches on both sides have gradually reduced transverse widths.
In the scheme, the longitudinal lengths of all the radiation-emitting metal patches are the same; in the longitudinal arrangement direction of the radiation emitting metal patches, the radiation emitting metal patches located at the middle are largest in lateral width, and the radiation emitting metal patches gradually decrease in lateral width toward both sides.
In the above scheme, the number of the emission guiding metal patches contained in the emission guiding metal patch array is the same as the number of the emission radiation metal patches contained in the emission radiation metal patch array, and the positions are in one-to-one correspondence in the vertical projection direction; wherein the size of the emission guiding metal patch is smaller than the size of the emission radiation metal patch corresponding to the vertical projection direction.
In the above arrangement, the lateral width of the radiating reflective metal strip is between the lateral width of the largest radiating metal patch and the lateral width of the second largest radiating metal patch.
In the scheme, the longitudinal lengths of all the radiation receiving metal patches are the same; in the longitudinal arrangement direction of the radiation receiving metal patches, the transverse width of the radiation receiving metal patch positioned at the middle is the largest, and the transverse width of the radiation receiving metal patches gradually decreases towards the two sides.
In the scheme, the microstrip antenna is launchedThe longitudinal length of the matching section and the longitudinal length of the receiving microstrip matching section are lambda ε 4, wherein lambda ε Is the medium wavelength.
In the above scheme, the direction of the emission reflection metal strip deviating from the longitudinal center line of the emission reflection medium substrate is the same side as the direction of the emission radiation unit deviating from the longitudinal center line of the emission radiation medium substrate.
In the above scheme, the size of the transmitting reflecting medium substrate is the same as that of the transmitting radiating medium substrate, and the size of the receiving reflecting medium substrate is the same as that of the receiving radiating medium substrate.
In the above scheme, the longitudinal lengths of the transmitting reflective medium substrate and the transmitting radiation medium substrate are equal to the longitudinal lengths of the receiving reflective medium substrate and the receiving radiation medium substrate, and the transverse widths of the transmitting reflective medium substrate and the transmitting radiation medium substrate are larger than those of the receiving reflective medium substrate and the receiving radiation medium substrate.
Compared with the prior art, the invention realizes that the transmitting antenna and the receiving antenna fan-shaped wide beams on the horizontal plane, realizes narrow beams on the pitching plane, loads and guides the narrow beams to the metal patch plane on the reflecting layer of the transmitting antenna, and leads the beams of the transmitting antenna to deviate. The 3dB wave beam width of the nodding face of the transmitting antenna is 9.7 degrees, the wave beam width with the horizontal plane gain of more than 10dB reaches 156 degrees, the maximum gain is biased to 60 degrees, and the maximum gain is 13.5dB; the 3dB beam width of the receiving antenna is 9.9 degrees on the nodding surface, the maximum gain of the horizontal plane is 13.9dB, and the 3dB beam width is 152.1 degrees. The transmitting antenna and the receiving antenna are simple in structure, easy to process, gain and beam width meet the requirements of the vehicle-mounted angle radar, and the method is suitable for the vehicle-mounted angle radar.
Drawings
Fig. 1 is a schematic development of a structure of a fan-shaped wide beam transmitting antenna.
Fig. 2 is a schematic structural diagram of a reflecting layer of a transmitting antenna.
Fig. 3 is a schematic diagram of a radiation layer structure of a transmitting antenna.
Fig. 4 is a schematic development of the structure of a fan-shaped wide beam receiving antenna.
Fig. 5 is a schematic diagram of a reflective layer structure of a receiving antenna.
Fig. 6 is a schematic diagram of a radiation layer structure of a receiving antenna.
Fig. 7 shows a transmitting antenna S 11 Graph diagram.
Fig. 8 is a horizontal plane (H-plane) radiation pattern of the transmitting antenna at the center frequency.
Fig. 9 is a nose-down (E-plane) radiation pattern of the transmitting antenna at the center frequency.
Fig. 10 shows a receiving antenna S 11 Graph diagram.
Fig. 11 is a horizontal plane (H-plane) radiation pattern of the receiving antenna at the center frequency.
Fig. 12 is a dip (E-plane) radiation pattern of the receiving antenna at the center frequency.
Reference numerals in the drawings:
1. an emissive reflective layer; 1-1, emitting a reflective medium substrate; 1-2 emission is directed to a metal patch; 1-3, emitting a reflective metal strip;
2. a radiation emitting layer; 2-1, emitting a metal floor; 2-2, a radiation emitting medium substrate; 2-3, transmitting a microstrip feeder line; 2-4, emitting radiation metal patches; 2-5, transmitting a microstrip matching section;
3. receiving the reflective layer; 3-1, receiving a reflective medium substrate; 3-2, receiving a reflective metal strip;
4. a radiation receiving layer; 4-1, receiving a metal floor; 4-2, receiving a radiation medium substrate; 4-3, receiving a microstrip feeder line; 4-4, receiving a radiation patch; 4-5, receiving the microstrip matching section.
Detailed Description
The present invention will be further described in detail below with reference to specific embodiments and with reference to the accompanying drawings, in order to make the objects, technical solutions and advantages of the present invention more apparent. In the embodiments, directional terms such as "upper", "lower", "middle", "left", "right", "front", "rear", and the like are merely directions with reference to the drawings. Accordingly, the directions of use are merely illustrative and not intended to limit the scope of the invention.
A fan-shaped wide beam transceiver antenna includes a transmitting antenna and a receiving antenna.
The above-mentioned transmitting antenna is shown in fig. 1, and the antenna includes a transmitting reflecting layer 1 and a transmitting radiating layer 2 which are arranged at opposite intervals. The longitudinal centers of the emission reflecting layer 1 and the emission radiation layer 2 are on the same vertical line. The size of the interval between the transmitting reflective layer 1 and the transmitting radiation layer 2 has a larger influence on the beam width of the transmitting antenna, and the interval between the transmitting reflective layer 1 and the transmitting radiation layer 2 of the transmitting antenna in this embodiment is 3.3mm after optimization.
Referring to fig. 2, the emission-reflection layer 1 is constituted by an emission-reflection dielectric substrate 1-1, an emission-guiding metal patch array, and an emission-reflection metal tape 1-3. The emission-guiding metal patch array and the emission-reflecting metal tape 1-3 are simultaneously arranged on the surface, namely the lower surface, of one side of the emission-reflecting medium substrate 1-1 facing the emission radiation layer 2, and the emission-guiding metal patch array and the emission-reflecting metal tape 1-3 are respectively positioned on two sides of the longitudinal midline of the emission-reflecting medium substrate 1-1. In this embodiment, the radiating reflective metal strip 1-3 is located to the left of the longitudinal midline of the radiating reflective dielectric substrate 1-1, and the radiating directing metal patch array is located to the right of the longitudinal midline of the radiating dielectric substrate 2-2, offset the radiating direction of the radiating antenna by 60 °. In this embodiment, the distance between the longitudinal centerline of the reflective metal strip 1-3 and the longitudinal centerline of the reflective dielectric substrate 1-1 is 1.55mm, and the distance between the longitudinal centerline of the reflective metal patch array and the longitudinal centerline of the reflective dielectric substrate 1-1 is 1.7mm. The emission-guiding metal patch array includes a plurality of rectangular emission-guiding metal patches 1-2, the emission-guiding metal patches 1-2 are equally spaced along the longitudinal direction of the emission-reflecting medium substrate 1-1, and the longitudinal midlines of all emission-guiding metal patches 1-2 coincide. In this embodiment, the number of the emission guide metal patches 1-2 is 10, and the distance between the lateral midlines of each two guide metal patches is 2.25mm. The longitudinal lengths of all emission-guiding metal patches 1-2 are the same. In the longitudinal arrangement direction of the emission guide metal patches 1-2, the lateral width of the emission guide metal patch 1-2 located at the most middle is the largest, and the lateral widths of the emission guide metal patches 1-2 toward both sides are gradually reduced. In this embodiment, the 10 emission guides 1-2 are unified to have a longitudinal length of 0.69mm and a lateral width of 0.1mm, 0.3mm, 0.55mm, 0.7mm, 0.9mm, 0.7mm, 0.55mm, 0.3mm, 0.1mm, respectively. The reflective metal strip 1-3 is rectangular strip-shaped and extends in the longitudinal direction of the reflective dielectric substrate 1-1 up to the edge of the reflective dielectric substrate 1-1. The lateral width of the emission-reflection metal stripe 1-3 is between the lateral width of the largest emission-radiation metal patch 2-4 and the lateral width of the second largest emission-radiation metal patch 2-4, i.e. the lateral width of the emission-reflection metal stripe 1-3 is between the lateral width of the 4 th emission-radiation metal patch 2-4 and the lateral width of the 5 th emission-radiation metal patch 2-4 in this example. In this embodiment, the width of the reflective metal strips 1-3 is 1.06mm. Since the lateral width of the reflective metal strip 1-3 is slightly wider than that of most of the reflective metal patches 2-4, the reflective effect is achieved, and the effect of widening the beam in the horizontal plane (H-plane) can be achieved.
Referring to fig. 3, the radiation emitting layer 2 is composed of a radiation emitting metal floor 2-1, a radiation emitting medium substrate 2-2, and a radiation emitting unit. The size of the emission metal floor 2-1 is the same as that of the emission radiation medium substrate 2-2, and covers the upper surface, namely the lower surface, of one side surface of the emission radiation medium substrate 2-2 far from the emission reflection layer 1. The radiation emitting unit is provided on a side surface, i.e., an upper surface, of the radiation emitting medium substrate 2-2 facing the radiation reflecting layer 1, which is located on one side of a longitudinal center line of the radiation emitting medium substrate 2-2. In the present embodiment, the radiation emitting element is located on the left side of the longitudinal center line of the radiation emitting medium substrate 2-2. The transmitting radiation unit comprises a transmitting microstrip feeder line 2-3, a transmitting radiation metal patch array and a transmitting microstrip matching section 2-5. The radiation-emitting metal patch array includes a plurality of rectangular radiation-emitting metal patches 2-4, the radiation-emitting metal patches 2-4 are equally spaced along the longitudinal direction of the radiation-emitting medium substrate 2-2, and longitudinal midlines of all the radiation-emitting metal patches 2-4 coincide. The number of the emission guiding metal patches 1-2 contained in the emission guiding metal patch array is the same as the number of the emission radiating metal patches 2-4 contained in the emission radiating metal patch array, and the positions in the vertical projection direction are in one-to-one correspondence, that is, the transverse central line of the vertical projection of the emission guiding metal patches 1-2 on the emission radiating surface is corresponding to each emission radiating metal patchThe transverse centerlines of the sheets 2-4 coincide. Wherein the size of the emission-guiding metal patch 1-2 is slightly smaller than the size of the emission-radiating metal patch 2-4 corresponding to its perpendicular projection direction. The longitudinal lengths of all radiation emitting metallic patches 2-4 are the same. In the present embodiment, the number of radiation emitting metal patches 2-4 is 10. In the longitudinal arrangement direction of the radiation emitting metal patches 2-4, the radiation emitting metal patches 2-4 located at the most middle have the largest lateral width, while the radiation emitting metal patches 2-4 toward both sides have gradually decreasing lateral widths. The longitudinal central lines of the 10 radiation emitting metal patches 2-4 are coincident, the longitudinal lengths are the same, the transverse width of each radiation emitting metal patch 2-4 is controlled, so that the input impedance of each array element is different, the current amplitude of each array element is controlled, the whole linear array is subjected to Chebyshev current distribution, and narrow beams on the pitching plane (E plane) of the receiving antenna and the transmitting antenna are realized. The longitudinal center line of the transmitting microstrip matching section 2-5 coincides with the longitudinal center line of the transmitting radiation metal patch array, and the transmitting microstrip matching section 2-5 is positioned at the edge of the transmitting radiation medium substrate 2-2. The longitudinal lengths of the transmitting microstrip matching sections 2-5 are lambda ε 4, wherein lambda ε Is the medium wavelength to impedance match the array to 50 ohms. In this embodiment, the longitudinal length of the transmitting microstrip matching section 2-5 is 0.6mm, and the transverse width is 0.7mm. The strip-shaped transmitting microstrip feeder line 2-3 connects all transmitting radiation metal patches 2-4 and transmitting microstrip matching sections 2-5 in series. In this embodiment, the width of the transmitting microstrip feed line 2-3 is 0.23mm.
The receiving antenna includes, as shown in fig. 4, a receiving reflecting layer 3 and a receiving radiating layer 4 which are arranged at a distance from each other. The centers of the receiving reflection layer 3 and the receiving radiation layer 4 are on the same vertical line. The size of the interval between the receiving reflection layer 3 and the receiving radiation layer 4 has a large influence on the beam width of the receiving antenna, and the interval between the receiving reflection layer 3 and the receiving radiation layer 4 is 2.6mm in this embodiment after optimization.
Referring to fig. 5, the receiving-reflecting layer 3 is composed of a receiving-reflecting dielectric substrate 3-1 and receiving-reflecting metal stripes 3-2. The receiving reflective metal strip 3-2 is provided on the lower surface, which is the upper surface, of the side of the receiving reflective dielectric substrate 3-1 facing the receiving radiation layer 4, and the longitudinal center line of the receiving reflective metal strip 3-2 coincides with the longitudinal center line of the receiving reflective dielectric substrate 3-1. The receiving reflection metal strip 3-2 is rectangular strip-shaped and extends in the longitudinal direction of the receiving reflection medium substrate 3-1 up to the edge of the receiving reflection medium substrate 3-1.
Referring to fig. 6, the radiation receiving layer 4 is composed of a radiation receiving metal floor 4-1, a radiation receiving dielectric substrate 4-2, and a radiation receiving unit. The size of the receiving metal floor 4-1 is the same as that of the receiving radiation medium substrate 4-2, and covers the upper surface, namely the lower surface, of one side surface of the receiving radiation medium substrate 4-2 away from the receiving reflection layer 3. The receiving radiation unit is arranged on the side surface facing the receiving reflection layer 3, i.e. the upper surface, and the longitudinal midline of the receiving radiation unit is located at the coincidence of the longitudinal midline of the receiving radiation medium substrate 4-2. The receiving radiation unit comprises a receiving microstrip feeder line 4-3, a receiving radiation metal patch array and a receiving microstrip matching section 4-5. The radiation receiving metal patch array includes a plurality of radiation receiving metal patches 4-4, the radiation receiving metal patches 4-4 are equally spaced along the longitudinal direction of the radiation receiving dielectric substrate 4-2, and longitudinal centerlines of all the radiation receiving metal patches 4-4 coincide. In the present embodiment, the number of the radiation receiving metal patches 4-4 is 10. The longitudinal lengths of all the radiation receiving metal patches 4-4 are the same. The radiation receiving metal patches 4-4 located at the most middle have the largest lateral width in the longitudinal arrangement direction of the radiation receiving metal patches 4-4, and the lateral widths of the radiation receiving metal patches 4-4 gradually decrease toward the two sides. The longitudinal center line of the receiving microstrip matching section 4-5 coincides with the longitudinal center line of the receiving radiation metal patch array, and the receiving microstrip matching section 4-5 is positioned at the edge of the receiving radiation medium substrate 4-2. The longitudinal lengths of the receiving microstrip matching sections 4-5 are lambda ε 4, wherein lambda ε Is the medium wavelength. The long-strip receiving microstrip feeder line 4-3 connects all receiving radiation metal patches 4-4 and receiving microstrip matching sections 4-5 in series. The dimensions and principles of the receiving and transmitting radiating elements are exactly the same.
The size of the transmitting reflective medium substrate 1-1 is the same as the size of the transmitting radiation medium substrate 2-2, and the size of the receiving reflective medium substrate 3-1 is the same as the size of the receiving radiation medium substrate 4-2. The longitudinal length of the transmitting reflective medium substrate 1-1 and the transmitting radiation medium substrate 2-2 is equal to the longitudinal length of the receiving reflective medium substrate and the receiving radiation medium substrate 4-2, and the lateral width of the transmitting reflective medium substrate 1-1 and the transmitting radiation medium substrate 2-2 is larger than the lateral width of the receiving reflective medium substrate and the receiving radiation medium substrate 4-2. In this embodiment, the materials used for the transmitting reflective dielectric substrate 1-1, the transmitting radiation dielectric substrate 2-2, the receiving reflective dielectric substrate 3-1 and the receiving radiation dielectric substrate 4-2 are Rogers RO3003, the dielectric constant is 3.0, the loss tangent is 0.0010, and the thickness is 0.254mm.
Fig. 7-9 are S-parameter curves, radiation patterns (H-plane and E-plane), respectively, of a transmitting antenna according to an embodiment of the present invention. The center frequency of the transmitting antenna is 77GHz, the working bandwidth is 1.2GHz (76.4 GHz-77.6 GHz), the maximum gain in the horizontal plane (H plane) is biased to 60 degrees, the gain beam width of more than 10dB reaches 155 degrees, and the 3dB beam width (half-power beam width) of the pitching plane (E plane) is 9.7 degrees. Fig. 10-12 are S-parameter curves, radiation patterns (H-plane and E-plane) of a receiving antenna according to an embodiment of the invention, respectively. The center frequency of the receiving antenna is 77GHz, the working bandwidth is 1.2GHz (76.4 GHz-77.6 GHz), the maximum gain is 13.9dB, the 3dB beam width (half-power beam width) of the horizontal plane (H plane) is 152 degrees, and the 3dB beam width (half-power beam width) of the nodding plane (E plane) is 9.9 degrees. Therefore, the transceiving antenna has a simple structure, the wave beam of the pitching plane (E plane) is narrow, the wave beam of the horizontal plane (H plane) is wide, the wave beam shape is a fan-shaped wide wave beam, and the transceiving antenna can be suitable for the vehicle-mounted angle radar of an automobile.
It should be noted that, although the examples described above are illustrative, this is not a limitation of the present invention, and thus the present invention is not limited to the above-described specific embodiments. Other embodiments, which are apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein, are considered to be within the scope of the invention as claimed.
Claims (10)
1. A sector wide wave beam receiving and transmitting antenna comprises a transmitting antenna and a receiving antenna, and is characterized in that,
the transmitting antenna comprises a transmitting reflecting layer (1) and a transmitting radiation layer (2) which are arranged at intervals;
the emission reflecting layer (1) is composed of an emission reflecting medium substrate (1-1), an emission guiding metal patch array and an emission reflecting metal strip (1-3); the emission guiding metal patch array and the emission reflecting metal strip (1-3) are simultaneously arranged on the surface of one side of the emission reflecting medium substrate (1-1) facing the emission radiation layer (2), and the emission guiding metal patch array and the emission reflecting metal strip (1-3) are respectively positioned on two sides of the longitudinal central line of the emission reflecting medium substrate (1-1); the emission guiding metal patch array comprises a plurality of rectangular emission guiding metal patches (1-2), wherein the emission guiding metal patches (1-2) are distributed at equal intervals along the longitudinal direction of the emission reflecting medium substrate (1-1), and the longitudinal central lines of all the emission guiding metal patches (1-2) are coincident; the emission and reflection metal strip (1-3) is rectangular and strip-shaped, and extends to the edge of the emission and reflection medium substrate (1-1) along the two ends of the longitudinal direction of the emission and reflection medium substrate (1-1);
the radiation emitting layer (2) is composed of a radiation emitting metal floor (2-1), a radiation emitting medium substrate (2-2) and radiation emitting units; the size of the emission metal floor (2-1) is the same as that of the emission radiation medium substrate (2-2) and covers on one side surface of the emission radiation medium substrate (2-2) far away from the emission reflecting layer (1), the emission radiation unit is arranged on one side surface of the emission radiation medium substrate (2-2) facing the emission reflecting layer (1) and positioned on one side of the longitudinal center line of the emission radiation medium substrate (2-2), the emission radiation unit comprises an emission microstrip feeder line (2-3), an emission radiation metal patch array and an emission microstrip matching section (2-5), the emission radiation metal patch array comprises a plurality of rectangular emission radiation metal patches (2-4), the emission radiation metal patches (2-4) are distributed at equal intervals along the longitudinal direction of the emission radiation medium substrate (2-2), and the longitudinal center lines of all emission radiation metal patches (2-4) coincide, the longitudinal center line of the emission microstrip matching section (2-5) coincides with the longitudinal center line of the emission radiation metal patch array, and one end of the longitudinal direction of the emission microstrip matching section (2-5) extends to the edge of the emission radiation medium substrate (2-2);
the receiving antenna comprises a receiving reflecting layer (3) and a receiving radiation layer (4) which are arranged at intervals;
the receiving reflection layer (3) is composed of a receiving reflection medium substrate (3-1) and a receiving reflection metal strip (3-2); the receiving reflection metal strip (3-2) is arranged on the surface of one side of the receiving reflection medium substrate (3-1) facing the receiving radiation layer (4), and the longitudinal center line of the receiving reflection metal strip (3-2) coincides with the longitudinal center line of the receiving reflection medium substrate (3-1); the receiving reflection metal strip (3-2) is rectangular strip-shaped and extends to the edge of the receiving reflection medium substrate (3-1) along the longitudinal direction of the receiving reflection medium substrate (3-1);
the radiation receiving layer (4) is composed of a metal receiving floor (4-1), a radiation receiving medium substrate (4-2) and radiation receiving units; the size of the receiving metal floor (4-1) is the same as that of the receiving radiation medium substrate (4-2), and the receiving radiation medium substrate (4-2) is covered on the surface of one side far away from the receiving reflection layer (3); the receiving radiation unit is arranged on one side surface facing the receiving reflection layer (3), and the longitudinal center line of the receiving radiation unit is coincident with the longitudinal center line of the receiving radiation medium substrate (4-2); the receiving radiation unit comprises a receiving microstrip feeder line (4-3), a receiving radiation metal patch array and a receiving microstrip matching section (4-5); the radiation receiving metal patch array comprises a plurality of radiation receiving metal patches (4-4), wherein the radiation receiving metal patches (4-4) are distributed at equal intervals along the longitudinal direction of the radiation receiving medium substrate (4-2), and the longitudinal central lines of all the radiation receiving metal patches (4-4) are coincident; the longitudinal center line of the receiving microstrip matching section (4-5) coincides with the longitudinal center line of the receiving radiation metal patch array, and one end of the receiving microstrip matching section (4-5) in the longitudinal direction extends to the edge of the receiving radiation medium substrate (4-2); the strip-shaped receiving microstrip feeder line (4-3) connects all receiving radiation metal patches (4-4) and receiving microstrip matching sections (4-5) in series; the receiving radiating element is exactly the same size as the transmitting radiating element.
2. A fan-shaped wide beam transceiver antenna according to claim 1, characterized in that the longitudinal lengths of all the radiating patches (1-2) leading to the metal patch are the same; in the longitudinal arrangement direction of the emission guide metal patches (1-2), the emission guide metal patches (1-2) located at the middle have the largest transverse width, and the emission guide metal patches (1-2) toward both sides have the gradually decreasing transverse width.
3. A fan-shaped wide beam transceiver antenna according to claim 1, characterized in that the longitudinal lengths of all radiating metallic patches (2-4) are the same; in the longitudinal arrangement direction of the radiation emitting metal patches (2-4), the radiation emitting metal patches (2-4) located at the middle are largest in lateral width, and the radiation emitting metal patches (2-4) toward both sides are gradually reduced in lateral width.
4. A fan-shaped wide beam transceiver antenna according to claim 1, characterized in that the longitudinal lengths of all receiving radiating metallic patches (4-4) are the same; in the longitudinal arrangement direction of the radiation receiving metal patches (4-4), the radiation receiving metal patches (4-4) positioned at the middle are largest in transverse width, and the radiation receiving metal patches (4-4) on the two sides are gradually reduced in transverse width.
5. Sector-shaped wide-beam transceiver antenna according to claim 1, characterized in that the longitudinal lengths of the transmitting microstrip matching section (2-5) and the receiving microstrip matching section (4-5) are λ ε 4, wherein lambda ε Is the medium wavelength.
6. A fan-shaped broad beam transceiver antenna as claimed in claim 1, characterized in that the direction of the radiating reflective metal strip (1-3) deviating from the longitudinal centre line of the radiating reflective dielectric substrate (1-1) is on the same side as the direction of the radiating element deviating from the longitudinal centre line of the radiating dielectric substrate (2-2).
7. A fan-shaped broad beam transceiver antenna according to claim 1, characterized in that the size of the transmitting reflective dielectric substrate (1-1) is the same as the size of the transmitting radiation dielectric substrate (2-2), and the size of the receiving reflective dielectric substrate (3-1) is the same as the size of the receiving radiation dielectric substrate (4-2).
8. The fan-shaped wide beam transceiver antenna of claim 7, wherein the longitudinal length of the transmitting reflective dielectric substrate (1-1) and the transmitting radiation dielectric substrate (2-2) is equal to the longitudinal length of the receiving reflective dielectric substrate and the receiving radiation dielectric substrate (4-2), and the lateral width of the transmitting reflective dielectric substrate (1-1) and the transmitting radiation dielectric substrate (2-2) is larger than the lateral width of the receiving reflective dielectric substrate and the receiving radiation dielectric substrate (4-2).
9. The fan-shaped wide beam transceiver antenna of claim 1, wherein the number of emission-guiding metal patches (1-2) included in the emission-guiding metal patch array is the same as the number of emission-radiating metal patches (2-4) included in the emission-radiating metal patch array, and the positions are in one-to-one correspondence in the vertical projection direction; wherein the size of the emission guiding metal patch (1-2) is smaller than the size of the emission radiation metal patch (2-4) corresponding to the vertical projection direction.
10. A fan-shaped wide beam transceiver antenna according to claim 1, characterized in that the lateral width of the radiating reflective metal strip (1-3) is between the lateral width of the largest radiating metal patch and the lateral width of the second largest radiating metal patch.
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| CN201810510358.7A CN108879089B (en) | 2018-05-24 | 2018-05-24 | Sector wide beam receiving and transmitting antenna |
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| TWI691118B (en) * | 2019-02-11 | 2020-04-11 | 緯創資通股份有限公司 | Antenna system |
| CN110233356B (en) * | 2019-07-01 | 2021-08-10 | 武汉安智核通科技有限公司 | Series feed microstrip antenna array and optimization design method thereof |
| CN112332081B (en) * | 2020-10-30 | 2021-12-10 | 电子科技大学 | Wide-lobe complementary source antenna based on microstrip structure |
| CN114006162B (en) * | 2021-11-09 | 2023-07-25 | 中汽创智科技有限公司 | Vehicle-mounted radar antenna and vehicle |
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| CN105896091A (en) * | 2016-06-07 | 2016-08-24 | 桂林电子科技大学 | Miniaturized broadband high-gain circular polarized microstrip antenna |
| CN206697596U (en) * | 2017-03-16 | 2017-12-01 | 江苏捷士通射频系统有限公司 | A kind of ultra-wideband antenna for base station |
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| US20170025751A1 (en) * | 2015-07-22 | 2017-01-26 | Google Inc. | Fan Beam Antenna |
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| CN105896091A (en) * | 2016-06-07 | 2016-08-24 | 桂林电子科技大学 | Miniaturized broadband high-gain circular polarized microstrip antenna |
| CN107799881A (en) * | 2016-09-07 | 2018-03-13 | 南京理工大学 | A kind of reflectarray antenna that Waveguide slot antenna is integrated based on medium |
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