CN113113773A - Novel anti-interference microstrip array antenna of millimeter wave radar - Google Patents
Novel anti-interference microstrip array antenna of millimeter wave radar Download PDFInfo
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- CN113113773A CN113113773A CN202110328166.6A CN202110328166A CN113113773A CN 113113773 A CN113113773 A CN 113113773A CN 202110328166 A CN202110328166 A CN 202110328166A CN 113113773 A CN113113773 A CN 113113773A
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- 238000002955 isolation Methods 0.000 claims abstract description 26
- 230000005855 radiation Effects 0.000 claims abstract description 26
- 238000007373 indentation Methods 0.000 claims description 4
- 230000008878 coupling Effects 0.000 abstract description 13
- 238000010168 coupling process Methods 0.000 abstract description 13
- 238000005859 coupling reaction Methods 0.000 abstract description 13
- 238000010586 diagram Methods 0.000 abstract description 8
- 238000013461 design Methods 0.000 abstract description 6
- 238000004891 communication Methods 0.000 abstract description 4
- 230000001965 increasing effect Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
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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
- H01Q1/48—Earthing means; Earth screens; Counterpoises
-
- 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
-
- 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
- H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
- H01Q21/061—Two dimensional planar arrays
- H01Q21/065—Patch antenna array
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- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
The invention belongs to the technical field of antennas and discloses a novel millimeter wave radar anti-interference microstrip array antenna which comprises a microstrip dielectric plate, radiation units, an isolation strip, a radio frequency chip and a plurality of groups of grounding false units arranged in an arrayed mode, wherein the radiation units, the isolation strip, the radio frequency chip and the grounding false units are all arranged on the front face of the microstrip dielectric plate, the grounding false units are designed in the same mode as the radiation units, circular through holes are designed at feed positions for grounding, and the isolation strip isolates the radio frequency chip from the radiation units. The invention adopts the conformal design of the grounding dummy unit between the array antennas, can effectively inhibit the mutual coupling interference between the feed network and the array antennas, and cuts the chip and the antenna radiation area through the isolation belt, thereby reducing the influence of chip leakage on the direction diagram, keeping the consistency of energy receiving and transmitting in all directions, having the advantages of weak coupling and high isolation, reducing the chip interference and low profile, and being widely applied to radar, remote sensing, electronic countermeasure, wireless communication systems and the like.
Description
Technical Field
The invention relates to the technical field of antennas, in particular to a novel millimeter wave radar anti-interference microstrip array antenna.
Background
With the improvement of the integration level of electronic equipment, the volume of communication equipment becomes smaller and smaller, the microstrip antenna has the characteristics of small volume, light weight, low profile, easiness in installation, conformity with the surface of a carrier and the like, and the feed network and the antenna are manufactured together and are suitable for large-scale production by using a printed circuit technology. The microstrip antenna and the active device or the circuit are integrated into a whole, and the all-plane integrated transceiving front-end module can be realized. Therefore, the microstrip antenna technology has attracted general attention and has been widely applied to the fields of millimeter wave radar, communication, guidance, and the like.
Compared with the situation that a single antenna unit is difficult to meet the increasing performance requirement, the antenna array is an effective measure for enhancing the antenna performance, and an array antenna formed by a plurality of antenna units through a feed network can generate a flexible directional diagram and can generate higher gain, so that the feed network energy and phase distribution accuracy of the array antenna must be ensured. With the trend of miniaturization of devices, it is a difficult task to highly integrate an antenna and an active device without significantly affecting the gain and the pattern of the antenna. Firstly, a feeder line can radiate, so that an interference directional diagram reduces the gain, secondly, the energy leakage of an active circuit and a chip can generate very harmful influence on the performance of an antenna, and for rear-end signal processing, the coupling between a receiving antenna and a transmitting antenna influences in-band modulation, so that the system cannot work normally.
In the design of the microstrip array antenna, it is often assumed that the antenna works under an ideal condition without considering the radiation influence of active circuits such as a feed network and a chip, which may cause deviation between the actual condition and the expected condition of the array antenna, and the deviation caused by mutual coupling may not be tolerated even in many cases. Especially, under the development trend of miniaturization of array antennas, radio frequency anti-interference becomes a key problem for restricting the improvement of the performance of the array antennas. The traditional isolation measure is based on the design of via holes at the periphery of an antenna, partial internal coupling can be inhibited, but the external coupling between the antennas brings serious distortion influence to a directional diagram of the array antenna, and the novel millimeter wave radar coupling interference resistant microstrip array antenna is provided in order to solve the problems that the level of a directional diagram side lobe is increased and the gain is reduced due to the mutual coupling of the microstrip array antenna and a feed network, and the antenna cannot normally work due to interference caused by the energy leakage of an active circuit and a chip.
Disclosure of Invention
1. Technical problem to be solved
The invention aims to solve the defects in the prior art and provides a novel millimeter wave radar anti-interference microstrip array antenna.
2. Technical scheme
In order to solve the above problems, the present invention adopts the following technical solutions.
A novel millimeter wave radar anti-interference microstrip array antenna comprises a microstrip dielectric plate, radiation units, an isolation strip, a radio frequency chip and a plurality of groups of grounding false units which are arranged in an arrayed mode, wherein the radiation units, the isolation strip, the radio frequency chip and the grounding false units are all arranged on the front face of the microstrip dielectric plate, the grounding false units are designed in the same mode as the radiation units, circular through holes are designed at feeding positions for grounding, and the radio frequency chip is isolated from the radiation units through the isolation strip;
the radiating unit comprises microstrip radiating patches and a feed structure connected with the microstrip radiating patches, the microstrip radiating patches are connected with one another in a longitudinal series mode through the feed structure to form a microstrip array, the microstrip array comprises a series-feed receiving antenna array and a series-feed transmitting antenna array, the series-feed receiving antenna array is composed of two rows of two units of microstrip radiating patches and is connected with a radio frequency chip, the series-feed transmitting antenna array is composed of one row of two units of microstrip radiating patches and is connected with the radio frequency chip, and a plurality of groups of grounding dummy units are arranged between the series-feed receiving antenna array and the series-feed transmitting antenna array at intervals.
As a further description of the above technical solution:
the feed structure is a microstrip feed line, the microstrip feed line is in indentation matching at the feed line, the frequency range is effectively widened, and the microstrip radiation patch is square.
As a further description of the above technical solution:
the isolation belt is of a multi-layer through hole structure.
As a further description of the above technical solution:
the microstrip radiation patch can be subjected to amplitude weighting according to the size, and the distance between two adjacent units is adjusted to enable the phases to be the same, so that a low side lobe array is formed.
3. Advantageous effects
Compared with the prior art, the invention has the advantages that:
the invention adopts the conformal design of the grounding dummy unit between the array antennas, can effectively inhibit the mutual coupling interference between the feed network and the array antennas, and cuts the chip and the antenna radiation area through the isolation belt, thereby reducing the influence of chip leakage on the direction diagram, keeping the consistency of energy receiving and transmitting in all directions, having the advantages of weak coupling and high isolation, reducing the chip interference and low profile, and being widely applied to radar, remote sensing, electronic countermeasure, wireless communication systems and the like.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
The reference numbers in the figures illustrate:
1. a microstrip dielectric plate; 2. a radiation unit; 21. a microstrip radiating patch; 22. a feed structure; 23. a series-fed receive antenna array; 24. a series-fed transmit antenna array; 3. an isolation zone; 4. a radio frequency chip; 5. and a dummy cell is grounded.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention; it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1, a novel millimeter wave radar anti-interference microstrip array antenna comprises a microstrip dielectric plate 1, a radiation unit 2, an isolation strip 3, a radio frequency chip 4 and a plurality of groups of grounding dummy units 5 arranged in an array, wherein the radiation unit 2, the isolation strip 3, the radio frequency chip 4 and the grounding dummy units 5 are all arranged on the front surface of the microstrip dielectric plate 1, the grounding dummy units 5 are designed in the same way as the radiation unit 2 and are grounded by circular through holes at the feed positions, the mutual coupling influence between the feed network and the array antenna is effectively reduced through the arrangement design of the grounding dummy units, the radio frequency chip 4 is isolated from the radiation unit 2 by the isolation belt 3, the radio frequency chip 4 and the microstrip array antenna are divided by the isolation strip 3, so that the isolation degree of the antenna and active circuits such as the radio frequency chip 4 is increased, and the mutual coupling influence between the feed network and the array antenna is reduced by the design of the grounding false unit.
The radiating unit 2 comprises microstrip radiating patches 21 and a feed structure 22 connected with the microstrip radiating patches 21, the microstrip radiating patches 21 are connected with each other in a longitudinal series mode through the feed structure 22 to form a microstrip array, feed excitation is carried out on a first unit, energy is transmitted backwards in sequence, the microstrip array comprises a series-feed receiving antenna array 23 and a series-feed transmitting antenna array 24, the series-feed receiving antenna array 23 consists of two rows of two units of microstrip radiating patches 21 and is connected with the radio frequency chip 4, the series-feed transmitting antenna array 24 consists of one row of two units of microstrip radiating patches 21 and is connected with the radio frequency chip 4, and a plurality of groups of grounding dummy units 5 are arranged between the series-feed receiving antenna array 23 and the series-feed transmitting antenna array 24 at intervals.
Specifically, the feed structure 22 is a microstrip feed line, the microstrip feed line is indentation matching at the feed line, the frequency band is effectively widened, the microstrip radiation patch 21 is square, when in use, the wavelength of a working signal is determined according to the working frequency of the antenna system, the geometric size of a radiation array surface is determined according to the beam width and the gain requirement, the width of the square microstrip patch is designed, the indentation at the feed line is adjusted, and the matching bandwidth is increased.
Specifically, the isolation strip 3 is a multi-layer via structure, so that the array antenna and the radio frequency chip 4 are divided, and the isolation between the antenna and the chip and between the antenna and the active circuit is increased.
Specifically, the microstrip radiating patches 21 may be amplitude weighted according to their sizes, and the distance between two adjacent elements is adjusted to make the phases the same, so as to form a low sidelobe array.
The working principle is as follows: the radio frequency chip 4 passes through the multilayer via hole isolation band 3 through the feed network, feeds the series feed transmitting antenna array 24 and returns signals from the series feed receiving antenna array 23, the grounding false unit 5 can effectively reduce the mutual coupling influence between the feed network and the array antenna, and meanwhile, the isolation band 3 effectively isolates the energy leaked by the radio frequency chip 4, so that the gain fluctuation of an antenna directional diagram is small;
through actual test comparison, the scheme can greatly reduce the gain fluctuation in the 3dB wave beam width of the array antenna, and the micro-strip array antenna which is weakly interfered with and coupled, miniaturized, low in profile and easy to be conformal to a carrier is well realized.
The foregoing is only a preferred embodiment of the present invention; the scope of the invention is not limited thereto. Any person skilled in the art should be able to cover the technical scope of the present invention by equivalent or modified solutions and modifications within the technical scope of the present invention.
Claims (4)
1. The utility model provides a novel anti-interference microstrip array antenna of millimeter wave radar which characterized in that: the antenna comprises a microstrip dielectric plate (1), a radiation unit (2), an isolation strip (3), a radio frequency chip (4) and a plurality of groups of grounding false units (5) which are arranged, wherein the radiation unit (2), the isolation strip (3), the radio frequency chip (4) and the grounding false units (5) are all arranged on the front surface of the microstrip dielectric plate (1), the grounding false units (5) are designed in the same way as the radiation unit (2) and are grounded by circular through holes at a feed position, and the isolation strip (3) isolates the radio frequency chip (4) from the radiation unit (2);
the radiating unit (2) comprises microstrip radiating patches (21) and a feed structure (22) connected with the microstrip radiating patches (21), the microstrip radiating patches (21) are connected in series longitudinally through the feed structure (22) to form a microstrip array, the microstrip array comprises a series-feed receiving antenna array (23) and a series-feed transmitting antenna array (24), the series-feed receiving antenna array (23) is composed of two rows of two-unit microstrip radiating patches (21) and is connected with a radio frequency chip (4), the series-feed transmitting antenna array (24) is composed of one row of two-unit microstrip radiating patches (21) and is connected with the radio frequency chip (4), and multiple groups of grounding dummy units (5) are arranged between the series-feed receiving antenna array (23) and the series-feed transmitting antenna array (24) at intervals.
2. The novel millimeter wave radar anti-interference microstrip array antenna according to claim 1, wherein: the feed structure (22) is a microstrip feed line, the microstrip feed line is in indentation matching at the feed line and effectively expands a frequency band, and the microstrip radiation patch (21) is square.
3. The novel millimeter wave radar anti-interference microstrip array antenna according to claim 1, wherein: the isolation belt (3) is of a multi-layer through hole structure.
4. The novel millimeter wave radar anti-interference microstrip array antenna according to claim 1, wherein: the microstrip radiation patches (21) can be subjected to amplitude weighting according to the size, and the distance between two adjacent units is adjusted to enable the phases to be the same, so that a low side lobe array is formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110328166.6A CN113113773A (en) | 2021-03-26 | 2021-03-26 | Novel anti-interference microstrip array antenna of millimeter wave radar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110328166.6A CN113113773A (en) | 2021-03-26 | 2021-03-26 | Novel anti-interference microstrip array antenna of millimeter wave radar |
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| Publication Number | Publication Date |
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| CN113113773A true CN113113773A (en) | 2021-07-13 |
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| CN202110328166.6A Pending CN113113773A (en) | 2021-03-26 | 2021-03-26 | Novel anti-interference microstrip array antenna of millimeter wave radar |
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|---|---|---|---|---|
| CN105490036A (en) * | 2016-01-07 | 2016-04-13 | 华南理工大学 | Series-feed and shunt-feed combination filtering microstrip array antenna |
| CN106486766A (en) * | 2016-10-12 | 2017-03-08 | 上海欣国泰信息通信有限公司 | A kind of uncoupling micro-strip array antenna |
| CN106785388A (en) * | 2016-12-09 | 2017-05-31 | 安徽四创电子股份有限公司 | A kind of series feed micro-strip array antenna |
| CN106972251A (en) * | 2017-04-10 | 2017-07-21 | 合肥工业大学 | A kind of three trap conformal omnidirectional micro-strip array antennas |
| CN107611577A (en) * | 2017-09-06 | 2018-01-19 | 上海通趣科技有限公司 | A kind of micro-strip array antenna based on 77GHz millimetre-wave radars |
| CN207116707U (en) * | 2017-09-13 | 2018-03-16 | 武汉雷可达科技有限公司 | Micro-strip phased array antenna and ground security radar equipment |
| CN109244681A (en) * | 2018-10-11 | 2019-01-18 | 上海莫吉娜智能信息科技有限公司 | Micro-strip array antenna system based on 77GHz millimetre-wave radar |
| CN209592319U (en) * | 2019-04-02 | 2019-11-05 | 长沙智能驾驶研究院有限公司 | Microstrip antenna, circuit board and terminal |
| CN110456313A (en) * | 2019-08-27 | 2019-11-15 | 青岛若愚科技有限公司 | Device applied to rectangular microstrip millimetre-wave radar sensor |
| CN110676560A (en) * | 2019-10-18 | 2020-01-10 | 富临精工先进传感器科技(成都)有限责任公司 | 77GHz millimeter wave radar antenna |
-
2021
- 2021-03-26 CN CN202110328166.6A patent/CN113113773A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105490036A (en) * | 2016-01-07 | 2016-04-13 | 华南理工大学 | Series-feed and shunt-feed combination filtering microstrip array antenna |
| CN106486766A (en) * | 2016-10-12 | 2017-03-08 | 上海欣国泰信息通信有限公司 | A kind of uncoupling micro-strip array antenna |
| CN106785388A (en) * | 2016-12-09 | 2017-05-31 | 安徽四创电子股份有限公司 | A kind of series feed micro-strip array antenna |
| CN106972251A (en) * | 2017-04-10 | 2017-07-21 | 合肥工业大学 | A kind of three trap conformal omnidirectional micro-strip array antennas |
| CN107611577A (en) * | 2017-09-06 | 2018-01-19 | 上海通趣科技有限公司 | A kind of micro-strip array antenna based on 77GHz millimetre-wave radars |
| CN207116707U (en) * | 2017-09-13 | 2018-03-16 | 武汉雷可达科技有限公司 | Micro-strip phased array antenna and ground security radar equipment |
| CN109244681A (en) * | 2018-10-11 | 2019-01-18 | 上海莫吉娜智能信息科技有限公司 | Micro-strip array antenna system based on 77GHz millimetre-wave radar |
| CN209592319U (en) * | 2019-04-02 | 2019-11-05 | 长沙智能驾驶研究院有限公司 | Microstrip antenna, circuit board and terminal |
| CN110456313A (en) * | 2019-08-27 | 2019-11-15 | 青岛若愚科技有限公司 | Device applied to rectangular microstrip millimetre-wave radar sensor |
| CN110676560A (en) * | 2019-10-18 | 2020-01-10 | 富临精工先进传感器科技(成都)有限责任公司 | 77GHz millimeter wave radar antenna |
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