CN111864351A - Microstrip array antenna - Google Patents
Microstrip array antenna Download PDFInfo
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- CN111864351A CN111864351A CN201910363069.3A CN201910363069A CN111864351A CN 111864351 A CN111864351 A CN 111864351A CN 201910363069 A CN201910363069 A CN 201910363069A CN 111864351 A CN111864351 A CN 111864351A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or 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
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
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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
- H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/08—Radiating ends of two-conductor microwave transmission lines, e.g. of coaxial lines, of microstrip lines
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
The application relates to a microstrip array antenna, which comprises a plurality of antenna units which are electrically connected with each other and arranged in an array, wherein each antenna unit comprises a microstrip patch, each microstrip patch is provided with at least one radiation opening and comprises at least one sub patch part surrounding the radiation opening; the microstrip patch generates a first resonance, and the sub-patch portion generates at least another second resonance that can be superposed with the first resonance. The microstrip array antenna of this application, microstrip paster can produce first resonance, simultaneously through setting up the radiation opening for the sub-paster near the radiation opening produces at least another can with the superimposed second resonance of first resonance, and then through the stack of first resonance and second resonance, has expanded the bandwidth.
Description
Technical Field
The present application relates to the field of antenna technology, and more particularly, to a microstrip array antenna.
Background
Antennas are an important component of wireless communication systems. Microstrip antennas have been widely used due to their advantages of small size, light weight, low profile, commonality, and ease of integration.
However, a microstrip antenna is basically a leaky-wave cavity, and its resonance behaves like an RLC parallel resonant circuit. Therefore, the microstrip array antenna is generally narrow in bandwidth, and cannot meet the requirements of vehicle-mounted radars and the like on the antenna.
Disclosure of Invention
In view of the above, it is desirable to provide a microstrip array antenna capable of increasing a frequency bandwidth.
A microstrip array antenna comprises multiple antenna units electrically connected with each other and arranged in array, wherein the antenna units comprise microstrip patches,
the microstrip patch has at least one radiation opening and includes at least one sub-patch portion surrounding the radiation opening;
the microstrip patch generates a first resonance, and the sub-patch portion generates at least another second resonance that can be superimposed with the first resonance.
In one embodiment, the radiation openings include a first opening extending in a first direction and a second opening extending in a second direction, the first direction being perpendicular to the second direction, the first opening communicating with the second opening, the second opening being interposed between the first opening and the microstrip patch edge.
In one embodiment, the number of the radiation openings in the same microstrip patch is multiple, the microstrip patch further has a connection pore, and the second openings of the radiation openings in the same microstrip patch are communicated through the connection pore.
In one embodiment, the connection fine hole communicates with one side of each second opening close to the edge of the microstrip patch, and the feed point of the microstrip patch is located on the edge of the microstrip patch close to the second opening.
In one embodiment, the length of the first opening is 0.1mm-1mm, and the width of the first opening is 0.01mm-0.1 mm; the length of the second opening is 0.1mm-1mm, and the width of the second opening is 0.01mm-0.1 mm; the length of the connecting fine hole is 0.5mm-1mm, and the width of the connecting fine hole is 0.01mm-0.5 mm.
In one embodiment, the antenna unit further includes a dielectric substrate and a ground plate, the microstrip patch and the ground plate are respectively located on two sides of the dielectric substrate, and each of the antenna units shares one of the dielectric substrate and one of the ground plate.
In one embodiment, the material of the dielectric substrate is a liquid crystal polymer.
In one embodiment, the microstrip array antenna further includes a feed network distributed axisymmetrically, and a plurality of the antenna units are electrically connected through the feed network.
In one embodiment, the microstrip patch is a rectangular metal patch, and has a length of 0.5mm-1.5mm and a width of 1mm-2 mm.
In one embodiment, the distance between each antenna unit is 1.8mm-3 mm.
Above-mentioned microstrip array antenna, microstrip paster can produce first resonance, simultaneously through setting up the radiation opening for the sub-paster near the radiation opening produces at least another second resonance that can with first resonance stack, and then through the stack of first resonance and second resonance, has expanded the bandwidth.
Drawings
FIG. 1 is a schematic diagram of a microstrip array antenna in one embodiment;
FIG. 2 is a schematic diagram of an antenna unit in one embodiment;
FIG. 3 is an exploded view of a microstrip array antenna according to one embodiment;
FIG. 4 is a standing-wave back of a simulation result of a microstrip array antenna in one embodiment;
FIG. 5 is a diagram of simulation results for 74GHz for a microstrip array antenna in one embodiment;
FIG. 6 is a diagram of the 75GHz simulation results for a microstrip array antenna in one embodiment;
FIG. 7 is a diagram of simulation results for 76GHz for a microstrip array antenna in one embodiment;
FIG. 8 is a diagram of a 77GHz simulation for a microstrip array antenna in one embodiment;
FIG. 9 is a diagram of simulation results for 78GHz for a microstrip array antenna in one embodiment;
FIG. 10 is a graph of simulation results for a 79GHz microstrip array antenna in one embodiment;
FIG. 11 is a diagram of simulation results for 80GHz for a microstrip array antenna in one embodiment;
figure 12 is a pattern diagram of simulation results for 81GHz for a microstrip array antenna in one embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
The microstrip array antenna provided by the application can be applied to a 77GHz radar microstrip antenna, but not limited to the application. Compared with the traditional 24GHz vehicle-mounted radar microstrip antenna, the 77GHz radar microstrip antenna can more easily realize the narrow wave speed and high gain of the antenna under the condition of smaller volume. Therefore, in the current mainstream vehicle-mounted automatic Cruise control system (Adaptive Cruise control system) in europe and america, a 77GHz radar sensor is adopted.
In one embodiment, referring to fig. 1, a microstrip array antenna is provided, including a plurality of antenna elements 100 electrically connected to each other. The plurality of antenna units 100 are arranged in an array. For example, a microstrip array antenna may include 128 antenna elements 100. The 128 antenna elements 100 may be arranged in an 8 x 16 rectangular array at equal intervals.
Referring to fig. 2, the antenna unit 100 includes a microstrip patch 110. The microstrip patch 110 receives the feed and radiates a first resonance. In this embodiment, the microstrip patch 110 has at least one radiation opening 110 a. The partial patch surrounding one radiation opening forms one sub-patch portion 111. The number of the sub-patch portions 111 is also at least one corresponding to the radiation opening 110 a. I.e. the microstrip patch 110 comprises at least one sub-patch portion 111.
Each sub-patch section 111 radiates by receiving power feeding in the entirety of the microstrip patch 110, and also radiates by itself to generate a second resonance. When the shape and size of each radiation opening 110a are the same, the second radiation generated by each sub patch part 111 corresponding thereto is the same, and at this time, one second radiation is generated by the patch part 111. When the shape and size of each radiation opening 110a are different, the second radiation generated by each sub patch part 111 corresponding thereto is different, and at this time, the patch part 111 generates a plurality of second radiations. That is, the sub-patch section 111 generates at least another second resonance that can be superimposed with the first resonance.
Since the second resonance can be superimposed with the first resonance, the bandwidth of the microstrip array antenna provided by the present embodiment can be effectively widened.
In one embodiment, with continued reference to fig. 2, the radiation openings 110a include a first opening 110b extending in a first direction and a second opening 110c extending in a second direction, the first direction being perpendicular to the second direction. The first opening 110b communicates with the second opening 110c, so that the radiation opening 110a assumes a "T" shape. The second opening 110c is interposed between the first opening 110b and the edge of the microstrip patch 110, thereby facilitating the sub-patch section 111 surrounding the radiation opening 110a to generate a second resonance that can be superimposed with the first resonance.
In one embodiment, with continued reference to fig. 2, the number of radiating openings 110a in the same microstrip patch 110 is multiple. The microstrip patch also has a connection hole 110 d. The second openings 110c of the respective radiation openings 110a in the same microstrip patch 110 communicate through the connection fine holes 110 d. Each sub-patch part 111 forms an electrical connection with the feeding point through a portion (an elongated conductive portion) of the microstrip patch under the connection fine hole 110d, so that the sub-patch parts 111 corresponding to the plurality of radiation openings 110a can simultaneously receive feeding to radiate the second resonance.
At this time, the connection fine hole 110c is provided to communicate with one side of each second opening 110b close to the edge of the microstrip patch 110, and the feeding point P2 is located on the edge of the microstrip patch 110 close to the second opening 110c, thereby facilitating feeding of the microstrip patch 110 under a requirement (e.g., 0.025mm) of a specific feeding distance (distance between P1 and P2). At the same time, impedance matching is facilitated. And, it is also convenient to arrange the antenna elements 100 in an array at this time.
Further, in order to make the pattern radiated from the antenna symmetrical, the number of the radiation openings 110a may be set to an even number. An even number of radiation openings 110a are symmetrically arranged, thereby facilitating the symmetry of the pattern.
In one embodiment, referring to fig. 3, the antenna unit 100 further includes a dielectric substrate 120 and a ground plate 130. The microstrip patch 110 and the ground plate 130 are respectively located at two sides of the dielectric substrate 120, and each antenna unit 100 shares one dielectric substrate 120 and one ground plate 130, thereby facilitating the fabrication of the microstrip array antenna.
In one embodiment, the material of the dielectric substrate 120 is a Liquid Crystal Polymer (LCP). LCP has unique radio frequency characteristics, such as low dielectric constant and loss tangent angle, good flexibility, good sealing performance (water absorption rate is low and rain is 0.004%), and the like. Specifically, the dielectric substrate 120 of liquid crystal polymer may be set to have a thickness of 0.254mm, a dielectric constant of 3, and a corner cut loss of 0.0016.
In one embodiment, referring to fig. 1 or 3, the microstrip array antenna further comprises a feed network 200. The feeding network 200 includes a microstrip line 210 made up of a plurality of rectangular lines. The plurality of antenna units 100 are electrically connected through the feeding network 200, and the microstrip lines 210 may be arranged in a chebyshev distribution in width to achieve the best radiation effect. In the antenna feeding process, the feeding network 200 may be fed through the coaxial line L, and then the feeding network 200 feeds the microstrip patch 110 of each antenna unit 100. The inner conductor of the coaxial line L may be arranged to be electrically connected to the feeding network 200 and the outer conductor to be electrically connected to the ground plane.
The feed network 200 is distributed in an axisymmetric manner, thereby facilitating symmetry of the radiation pattern of the antenna. In the manufacturing process of the microstrip array antenna, the feeding network 200 may be formed on the same side of the dielectric substrate 120 as the antenna unit 100.
In one embodiment, referring to fig. 1 and 2, the microstrip array antenna is configured to include 128 antenna elements 100 electrically connected by an axisymmetric feed network 200. The 128 antenna elements 100 are arranged in an 8 x 16 rectangular array at equal intervals. The width of the microstrip lines 210 of the feeding network 200 is arranged in a chebyshev distribution.
The microstrip patch 110 has two "T" shaped radiating openings 110 a. The length L1 of the first opening 110b of the radiation opening 110a is 0.1mm to 1mm, and the width W1 of the first opening 110b is 0.01mm to 0.1 mm. The length L2 of the second opening 110c is 0.1mm-1mm, and the width W2 of the second opening 110c is 0.01mm-0.1 mm. The length L3 of the fine connecting hole 110d is 0.5mm to 1mm, and the width W3 of the fine connecting hole 110d is 0.01mm to 0.5 mm. The microstrip patch 110 may be specifically configured as a rectangular metal patch, and the length L4 may be 0.5mm to 1.5mm, and the width L5 may be 1mm to 2 mm. Meanwhile, the distance D between each antenna unit 100 is 1.8mm to 3 mm.
Referring to fig. 4 to 12, the present embodiment may enable the antenna to have a wide frequency band of 74GHz-81GHz in the 77GHz band, and have a low side lobe and a high gain.
Of course, in other embodiments of the present application, the number and arrangement of the antenna units 100, the sizes of the first opening 110b, the second opening 110c, and the connection fine hole 110d, the shape and size of the microstrip patch 110, and the distance between the antenna units 100 are not limited thereto, and may be adjusted according to actual situations.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above examples only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A microstrip array antenna comprises a plurality of antenna units electrically connected with each other and arranged in an array, wherein the antenna units comprise microstrip patches,
The microstrip patch has at least one radiation opening and includes at least one sub-patch portion surrounding the radiation opening;
the microstrip patch generates a first resonance, and the sub-patch portion generates at least another second resonance that can be superimposed with the first resonance.
2. The microstrip array antenna of claim 1, wherein the radiating opening comprises a first opening extending in a first direction and a second opening extending in a second direction, the first direction being perpendicular to the second direction, the first opening communicating with the second opening, the second opening being interposed between the first opening and the microstrip patch edge.
3. The microstrip array antenna according to claim 2, wherein the number of the radiating openings in the same microstrip patch is plural, the microstrip patch further has a connecting pore, and the second openings of the respective radiating openings in the same microstrip patch are communicated through the connecting pore.
4. The microstrip array antenna according to claim 3, wherein the fine connection hole communicates with a side of each of the second openings near the edge of the microstrip patch, and the feeding point of the microstrip patch is located on the edge of the microstrip patch near the second opening.
5. The microstrip array antenna of claim 4, wherein the first opening has a length of 0.1mm-1mm and a width of 0.01mm-0.1 mm; the length of the second opening is 0.1mm-1mm, and the width of the second opening is 0.01mm-0.1 mm; the length of the connecting fine hole is 0.5mm-1mm, and the width of the connecting fine hole is 0.01mm-0.5 mm.
6. The microstrip array antenna of claim 1, wherein the antenna elements further comprise a dielectric substrate and a ground plate, the microstrip patch and the ground plate are respectively located on two sides of the dielectric substrate, and each of the antenna elements shares one of the dielectric substrate and one of the ground plate.
7. The microstrip array antenna of claim 6, wherein the dielectric substrate is made of a liquid crystal polymer.
8. The microstrip array antenna of claim 6, further comprising an axisymmetrically distributed feed network, wherein a plurality of the antenna elements are electrically connected through the feed network.
9. The microstrip array antenna of claim 1, wherein the microstrip patch is a rectangular metal patch having a length of 0.5mm to 1.5mm and a width of 1mm to 2 mm.
10. The microstrip array antenna of claim 1, wherein the distance between each antenna element is 1.8mm-3 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910363069.3A CN111864351B (en) | 2019-04-30 | 2019-04-30 | Microstrip array antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910363069.3A CN111864351B (en) | 2019-04-30 | 2019-04-30 | Microstrip array antenna |
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| CN111864351A true CN111864351A (en) | 2020-10-30 |
| CN111864351B CN111864351B (en) | 2023-06-27 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007020009A (en) * | 2005-07-08 | 2007-01-25 | Ricoh Co Ltd | Patch antenna and patch antenna array |
| CN105305040A (en) * | 2015-09-25 | 2016-02-03 | 西安电子科技大学 | Antenna used for anti-metal tag and antenna signal transmitting and receiving method |
| CN107608942A (en) * | 2017-09-08 | 2018-01-19 | 北京理工大学 | The computational methods of polymer matrix microstrip antenna deflection at temperature and bending load |
| CN109149090A (en) * | 2018-07-13 | 2019-01-04 | 陈彭 | A kind of multilayer encapsulation antenna |
| CN109378594A (en) * | 2018-11-23 | 2019-02-22 | 西安电子科技大学 | Based on the integrated micro-strip array antenna of radiating scattering |
-
2019
- 2019-04-30 CN CN201910363069.3A patent/CN111864351B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007020009A (en) * | 2005-07-08 | 2007-01-25 | Ricoh Co Ltd | Patch antenna and patch antenna array |
| CN105305040A (en) * | 2015-09-25 | 2016-02-03 | 西安电子科技大学 | Antenna used for anti-metal tag and antenna signal transmitting and receiving method |
| CN107608942A (en) * | 2017-09-08 | 2018-01-19 | 北京理工大学 | The computational methods of polymer matrix microstrip antenna deflection at temperature and bending load |
| CN109149090A (en) * | 2018-07-13 | 2019-01-04 | 陈彭 | A kind of multilayer encapsulation antenna |
| CN109378594A (en) * | 2018-11-23 | 2019-02-22 | 西安电子科技大学 | Based on the integrated micro-strip array antenna of radiating scattering |
Non-Patent Citations (1)
| Title |
|---|
| QIONG WU 等: "Design of a Ku-band broadband U-slot microstrip antenna", 《2013 IEEE INTERNATIONAL CONFERENCE ON MICROWAVE TECHNOLOGY & COMPUTATIONAL ELECTROMAGNETICS》 * |
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| CN111864351B (en) | 2023-06-27 |
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