CN111864351B - Microstrip array antenna - Google Patents
Microstrip array antenna Download PDFInfo
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- CN111864351B CN111864351B CN201910363069.3A CN201910363069A CN111864351B CN 111864351 B CN111864351 B CN 111864351B CN 201910363069 A CN201910363069 A CN 201910363069A CN 111864351 B CN111864351 B CN 111864351B
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- microstrip
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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 are arranged in an array, wherein each antenna unit comprises a microstrip patch, the 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 one other second resonance that can be superimposed on the first resonance. The microstrip array antenna can generate first resonance, and meanwhile, the sub-patch near the radiation opening generates at least another second resonance which can be overlapped with the first resonance through the arrangement of the radiation opening, so that the bandwidth is expanded through the overlapping of the first resonance and the second resonance.
Description
Technical Field
The present application relates to the field of antenna technologies, and in particular, to a microstrip array antenna.
Background
Antennas are an important component of wireless communication systems. Microstrip antennas have found wide application in terms of their small size, light weight, low profile, commonality, and ease of integration.
However, the microstrip antenna is basically a leaky cavity, and its resonance characteristics are just like an RLC parallel resonant circuit. Therefore, the bandwidth of the microstrip array antenna is generally narrow, and the requirements of the vehicle radar and the like on the antenna cannot be met.
Disclosure of Invention
In view of the above, it is necessary to provide a microstrip array antenna capable of increasing the bandwidth.
A microstrip array antenna comprises a plurality of antenna units which are electrically connected with each other and arranged in an array, wherein each antenna unit comprises 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 one other second resonance that can be superimposed with the first resonance.
In one embodiment, the radiation opening includes 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 plural, and 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 connecting fine holes are communicated with one side, close to the edges of the microstrip patches, of each second opening, and the feed points of the microstrip patches are located on the edges of the microstrip patches, close to the second openings.
In one embodiment, the length of the first opening is 0.1mm-1mm, and the width of the first opening is 0.01mm-0.1mm; the length of the second opening is 0.1mm-1mm, and the width of the second opening is 0.01mm-0.1mm; the length of the connecting pores is 0.5mm-1mm, and the width of the connecting pores is 0.01mm-0.5mm.
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 at two sides of the dielectric substrate, and each antenna unit shares one dielectric substrate and one 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 an axisymmetrically distributed feed network, and the plurality of 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-2mm.
In one embodiment, the distance between each of the antenna elements is 1.8mm-3mm.
According to the microstrip array antenna, the microstrip patch can generate the first resonance, and meanwhile, the sub patch near the radiation opening generates at least one other second resonance which can be overlapped with the first resonance through the radiation opening, so that the bandwidth is expanded through the overlapping of the first resonance and the second resonance.
Drawings
FIG. 1 is a schematic diagram of a microstrip array antenna in one embodiment;
fig. 2 is a schematic diagram of an antenna element in one embodiment;
FIG. 3 is an exploded schematic view of a microstrip array antenna in one embodiment;
FIG. 4 is a standing-loop wave of simulation results of a microstrip array antenna in one embodiment;
FIG. 5 is a pattern diagram of simulation results for a 74GHz microstrip array antenna in one embodiment;
FIG. 6 is a pattern diagram of simulation results for a 75GHz microstrip array antenna in one embodiment;
FIG. 7 is a pattern diagram of simulation results for a 76GHz microstrip array antenna in one embodiment;
FIG. 8 is a pattern diagram of simulation results for a 77GHz microstrip array antenna in one embodiment;
FIG. 9 is a pattern diagram of simulation results for a 78GHz microstrip array antenna in one embodiment;
FIG. 10 is a pattern diagram of simulation results for a 79GHz microstrip array antenna in one embodiment;
FIG. 11 is a pattern diagram of simulation results for a microstrip array antenna in one embodiment at 80 GHz;
fig. 12 is a pattern of simulation results for a 81GHz 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 will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only 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 is not limited to the microstrip array antenna. Compared with the traditional 24GHz vehicle-mounted radar microstrip antenna, the 77GHz radar microstrip antenna is easier to realize the narrow wave speed and high gain of the antenna under smaller volume. Therefore, 77GHz radar sensors are adopted in the current European and American mainstream vehicle-mounted automatic cruise control system (Adaptive Cruise Control System).
In one embodiment, referring to fig. 1, a microstrip array antenna is provided, comprising a plurality of antenna elements 100 electrically connected to each other. The plurality of antenna elements 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 equally spaced in a rectangular array of 8 x 16.
Referring to fig. 2, the antenna unit 100 includes a microstrip patch 110. The microstrip patch 110 receives the feed and radiates to produce a first resonance. In this embodiment, the microstrip patch 110 has at least one radiation opening 110a. A sub-patch portion 111 is formed around a part of the patch of the radiation opening. The number of sub-patch portions 111 is also at least one in correspondence with the radiation opening 110a. I.e. the microstrip patch 110 comprises at least one sub-patch portion 111.
Each sub-patch portion 111 radiates by receiving the power feed and simultaneously radiates alone to generate a second resonance in the whole microstrip patch 110. When the shape and size of each radiation opening 110a are the same, the generated second radiation of each sub-patch portion 111 is the same, and at this time, one second radiation is generated by the patch portion 111. When the shape and size of each radiation opening 110a are different, the generated second radiation of each sub-patch portion 111 is different, and at this time, the patch portion 111 generates a plurality of second radiation. That is, the sub-patch part 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 opening 110a includes 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, so that the sub-patch portion 111 surrounding the radiation opening 110a generates 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 a plurality. The microstrip patch also has a connection aperture 110d. The second openings 110c of the radiation openings 110a in the same microstrip patch 110 communicate through the connection pore 110d. Each sub-patch portion 111 forms an electrical connection with the feeding point by connecting a portion (one elongated conductive portion) of the microstrip patch under the fine hole 110d, so that the sub-patch portions 111 corresponding to the plurality of radiation openings 110a can receive the feeding at the same time to radiate the second resonance.
At this time, the connecting holes 110c are disposed to communicate with one side of each second opening 110b near the edge of the microstrip patch 110, and the feeding point P2 is located on the edge of the microstrip patch 110 near the second opening 110c, so as to facilitate feeding the microstrip patch 110 under the requirement (for example, 0.025 mm) of meeting a specific feeding distance (for example, a 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 of the antenna radiation have symmetry, the number of radiation openings 110a may be set to an even number. The even number of radiation openings 110a are symmetrically arranged, thereby facilitating the realization of 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, so as to facilitate the manufacture of microstrip array antennas.
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, better flexibility, sealability (0.004% of water absorption), etc. Specifically, the dielectric substrate 120 of liquid crystal polymer may be provided with a thickness of 0.254mm, a dielectric constant of 3, and a chamfer loss of 0.0016.
In one embodiment, referring to fig. 1 or 3, the microstrip array antenna further comprises a feed network 200. The feed network 200 includes a microstrip line 210 formed 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 chebyshev distribution in width for 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 patches 110 of the respective antenna units 100. An inner conductor of the coaxial line L may be provided in electrical connection with the feed network 200 and an outer conductor in electrical connection with the ground plane.
The feed network 200 is in an axisymmetric distribution, thereby facilitating symmetry of the antenna radiation pattern. In the process of manufacturing 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, a microstrip array antenna is provided comprising 128 antenna elements 100 electrically connected by an axisymmetric feed network 200. The 128 antenna elements 100 are equally spaced in a rectangular array of 8 x 16. The microstrip lines 210 of the feed network 200 are arranged in a chebyshev distribution in width.
The microstrip patch 110 has two "T" shaped radiation openings 110a. The length L1 of the first opening 110b of the radiation opening 110a is 0.1mm-1mm, and the width W1 of the first opening 110b is 0.01mm-0.1mm. The length L2 of the second opening 110c is 0.1mm-1mm, and the width W2 of the second opening 110c is 0.01mm-0.1mm. The length L3 of the connecting pore 110d is 0.5mm to 1mm, and the width W3 of the connecting pore 110d is 0.01mm to 0.5mm. The microstrip patch 110 may be specifically configured as a rectangular metal patch, and the length L4 thereof may be 0.5mm to 1.5mm, and the width L5 thereof may be 1mm to 2mm. Meanwhile, the distance D between each of the antenna elements 100 is 1.8mm-3mm.
Referring to fig. 4 to 12, the present embodiment can make the antenna have a wide frequency band of 74GHz-81GHz in the 77GHz band, and have a lower 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 openings 110b, the second openings 110c, the connecting holes 110d, the shapes and sizes of the microstrip patches 110, the distances between the antenna units 100, and the like are not limited thereto, and may be adjusted according to practical situations.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The foregoing examples represent only a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the invention. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.
Claims (10)
1. A microstrip array antenna comprises a plurality of antenna units which are electrically connected with each other and are 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 part generates at least one other second resonance which can be overlapped with the first resonance;
the radiation opening comprises a first opening extending along a first direction and a second opening extending along a second direction, the first direction is perpendicular to the second direction, the first opening is communicated with the second opening, and the second opening is arranged between the first opening and the edge of the microstrip patch;
the number of the radiation openings in the same microstrip patch is a plurality, the microstrip patch is also provided with connecting pores, the extending direction of the connecting pores is the same as that of the first openings, and the connecting pores are different from that of the second openings, and the second openings of the radiation openings in the same microstrip patch are communicated through the connecting pores;
each sub-patch part forms electric connection with the feeding point through connecting a part of the micro-strip patch under the pore, so that the sub-patch parts corresponding to the plurality of radiation openings can receive feeding at the same time to radiate the second resonance.
2. The microstrip array antenna according to claim 1, wherein the number of radiating openings is an even number.
3. The microstrip array antenna according to claim 2, wherein an even number of radiation openings are symmetrically disposed.
4. The microstrip array antenna according to claim 1, wherein said connection apertures communicate with a side of each of said second openings adjacent to an edge of said microstrip patch, and a feed point of said microstrip patch is located on an edge of said microstrip patch adjacent to said second opening.
5. The microstrip array antenna according to claim 4, wherein said first opening has a length of 0.1mm to 1mm and a width of 0.01mm to 0.1mm; the length of the second opening is 0.1mm-1mm, and the width of the second opening is 0.01mm-0.1mm; the length of the connecting pores is 0.5mm-1mm, and the width of the connecting pores is 0.01mm-0.5mm.
6. The microstrip array antenna according to claim 1, wherein said antenna elements further comprise a dielectric substrate and a ground plate, said microstrip patch and said ground plate being located on respective sides of said dielectric substrate, each of said antenna elements sharing one of said dielectric substrates and sharing one of said ground plates.
7. The microstrip array antenna according to claim 6, wherein said dielectric substrate is a liquid crystal polymer.
8. The microstrip array antenna according to claim 6, further comprising an axisymmetrically distributed feed network, a plurality of said antenna elements being electrically connected by said feed network.
9. The microstrip array antenna according to claim 1, wherein said microstrip patch is a rectangular metal patch and has a length of 0.5mm to 1.5mm and a width of 1mm to 2mm.
10. The microstrip array antenna according to claim 1, wherein the distance between each of said antenna elements is 1.8mm-3mm.
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 CN111864351A (en) | 2020-10-30 |
| CN111864351B true 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 |
|---|
| Design of a Ku-band broadband U-slot microstrip antenna;Qiong Wu 等;《2013 IEEE INTERNATIONAL CONFERENCE ON MICROWAVE TECHNOLOGY & COMPUTATIONAL ELECTROMAGNETICS》;20130928;212-215 * |
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