CN214477884U - Dual-polarized antenna, dual-polarized array antenna and radar system - Google Patents
Dual-polarized antenna, dual-polarized array antenna and radar system Download PDFInfo
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- CN214477884U CN214477884U CN202120622938.2U CN202120622938U CN214477884U CN 214477884 U CN214477884 U CN 214477884U CN 202120622938 U CN202120622938 U CN 202120622938U CN 214477884 U CN214477884 U CN 214477884U
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Abstract
The utility model discloses a dual polarized antenna, dual polarized array antenna and radar system, the dual polarized antenna includes a first dielectric layer, a plurality of radiation patches and a substrate integrated waveguide structure which are connected in series; the radiation patches are arranged on the upper surface of the first medium layer, and every two adjacent radiation patches are connected through a vertical polarization feeder line; the substrate integrated waveguide structure is arranged at the lower end of the first medium layer, a plurality of coupling gaps are formed in the substrate integrated waveguide structure, and the substrate integrated waveguide structure is used for coupling electromagnetic waves to the radiation patch through the coupling gaps so that the radiation patch radiates horizontally polarized electromagnetic waves. According to the utility model discloses a dual polarized antenna, the feed mode of two kinds of polarizations all is the series connection feed form, need not longer feeder and complicated feed structure, is favorable to simplifying antenna structure to improve the radiation efficiency of antenna.
Description
Technical Field
The utility model belongs to the technical field of the antenna technology and specifically relates to a dual polarized antenna, dual polarized array antenna and radar system are related to.
Background
The millimeter wave radar has the characteristics of small volume, light weight, small influence of weather and the like, and is widely applied to an advanced assistant driving system of an automobile. However, most of the existing vehicle-mounted millimeter wave radars are single-polarization series-feed antennas, and the single-polarization antennas can only acquire polarization information of a certain dimension, so that the identification capability is not strong enough, and some targets may be missed. Although some millimeter-wave radars also adopt dual-polarized antennas, common dual-polarized millimeter-wave array antennas all adopt a parallel feed mode, so that a long feeder line and a complex feed structure are required, and the radiation efficiency of the antenna is low.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a dual polarized antenna, the feed mode of vertical polarization and horizontal polarization is the series connection feed mode, has both simplified the structure of antenna, has improved the radiation efficiency of antenna again.
The utility model also provides a dual polarization array antenna.
The utility model also provides a radar system of having above-mentioned dual polarization array antenna.
The dual-polarized antenna according to the embodiment of the first aspect of the present invention comprises a first dielectric layer, a plurality of radiation patches connected in series with each other, and a substrate integrated waveguide structure; the radiation patches are arranged on the upper surface of the first medium layer, and every two adjacent radiation patches are connected through a vertical polarization feeder line; the substrate integrated waveguide structure is arranged at the lower end of the first medium layer, a plurality of coupling gaps are formed in the substrate integrated waveguide structure, and the substrate integrated waveguide structure is used for coupling electromagnetic waves to the radiation patch through the coupling gaps so that the radiation patch radiates horizontally polarized electromagnetic waves.
According to the utility model discloses dual polarized antenna has following beneficial effect at least: the vertical polarization feeder feeds the radiation patch in a series connection mode, and after receiving electromagnetic energy of the feed source, the vertical polarization feeder generates current in the vertical direction on the radiation patch, so that the radiation patch radiates the energy of the vertical polarization electromagnetic wave outwards; the substrate integrated waveguide structure couples the high-frequency electromagnetic wave energy to the radiation patch through the coupling gap, so that induced current in the horizontal direction is generated on the radiation patch, and the radiation patch radiates horizontally polarized electromagnetic wave energy outwards; the two polarized feeding modes are in a series feeding mode, so that a longer feeder line and a complex feeding structure are not needed, the antenna structure is simplified, and the radiation efficiency of the antenna is improved; in addition, when this dual polarized antenna is applied to vehicle radar, compare in the on-vehicle radar of conventional single polarization millimeter wave, can provide the polarization information of more one-dimensional, more be favorable to radar discernment target to promote the target identification ability of radar.
According to some embodiments of the present invention, the substrate integrated waveguide structure includes a first metal layer, a second dielectric layer and a second metal layer, the first metal layer is disposed on a lower surface of the first dielectric layer, and the first metal layer is provided with a plurality of coupling gaps; the second dielectric layer is arranged on the lower surface of the first metal layer, and a plurality of metalized holes are formed in the second dielectric layer at intervals; the second metal layer is arranged on the lower surface of the second dielectric layer and is electrically connected with the first metal layer through the metallization hole.
According to some embodiments of the invention, a plurality of the radiation patches are distributed side by side on the upper surface of the first dielectric layer.
According to some embodiments of the invention, the distance between every two adjacent radiation patches is one waveguide wavelength of the first dielectric layer.
According to the utility model discloses a some embodiments, it is a plurality of coupling gap is along a plurality of radiation paster's the direction of arranging, staggered distribution is in a plurality of in proper order the both sides of radiation paster's symmetry axis, every the radiation paster corresponds one respectively the coupling gap.
According to some embodiments of the utility model, the coupling gap is the rectangle structure, the length direction in coupling gap is with a plurality of the direction of arranging of radiation patch is the same.
According to some embodiments of the invention, the distance between every two adjacent metallized holes is less than twice the diameter of the metallized hole.
According to some embodiments of the invention, the input of the vertically polarized feeder is connected to an impedance converter.
According to the utility model discloses dual polarization array antenna of second aspect embodiment, a plurality of transmitting antenna and a plurality of receiving antenna including mutual electric connection, transmitting antenna reaches receiving antenna adopts like the utility model discloses the above-mentioned first aspect embodiment dual polarization antenna.
According to the utility model discloses dual polarization array antenna has following beneficial effect at least: by adopting the dual-polarized antenna, the antenna structure is facilitated to be simplified, and the radiation efficiency of the antenna is improved.
According to the third aspect of the present invention, a radar system includes a dual polarized array antenna according to the second aspect of the present invention.
According to the utility model discloses radar system has following beneficial effect at least: by adopting the dual-polarized array antenna, polarization information of multiple dimensions can be obtained, and the identification capability of the radar to the target is favorably improved.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural diagram of a dual-polarized antenna according to an embodiment of the present invention;
fig. 2 is an exploded schematic view of a dual polarized antenna according to an embodiment of the present invention;
fig. 3 is a front view of a dual polarized antenna according to an embodiment of the present invention;
fig. 4 is a top view of a dual polarized antenna according to an embodiment of the present invention;
fig. 5 is a top view of a dual polarized array antenna according to an embodiment of the present invention;
reference numerals:
a first dielectric layer 100, a radiating patch 200, a vertically polarized feed line 300, a substrate integrated waveguide structure 400, a first metal layer 410, a coupling slot 411, a converter 412, a second dielectric layer 420, a metalized hole 421, a second metal layer 430, and an impedance converter 500.
Detailed Description
This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.
Referring to fig. 1 to 3, a dual polarized antenna according to an embodiment of the first aspect of the present invention includes a first dielectric layer 100, a plurality of radiation patches 200 connected in series with each other, and a substrate integrated waveguide structure 400; the radiation patches 200 are arranged on the upper surface of the first dielectric layer 100, and every two adjacent radiation patches 200 are connected through a vertical polarization feeder 300; the substrate integrated waveguide structure 400 is disposed at the lower end of the first dielectric layer 100, a plurality of coupling slots 411 are disposed on the substrate integrated waveguide structure 400, and the substrate integrated waveguide structure 400 is configured to couple electromagnetic waves to the radiation patch 200 through the coupling slots 411, so that the radiation patch 200 radiates horizontally polarized electromagnetic waves.
According to the dual-polarized antenna of the embodiment of the present invention, the vertical polarization feed line 300 feeds the radiation patch 200 in a series connection manner, and after the vertical polarization feed line 300 receives electromagnetic energy from the feed source, current in the vertical direction is generated on the radiation patch 200, so that the radiation patch 200 radiates the vertical polarization electromagnetic energy outwards; the substrate integrated waveguide structure 400 couples the high-frequency electromagnetic wave energy to the radiation patch 200 through the coupling slot 411, so that an induced current in the horizontal direction is generated on the radiation patch 200, and the radiation patch 200 radiates the horizontally polarized electromagnetic wave energy outwards; the two polarized feeding modes are both in a series feeding mode, a long feeder line and a complex feeding structure are not needed, the antenna structure is simplified, and the radiation efficiency of the antenna is improved. In addition, when this dual polarized antenna is applied to vehicle radar, compare in the on-vehicle radar of conventional single polarization millimeter wave, can provide the polarization information of more one-dimensional, more be favorable to radar discernment target to promote the detectability of radar.
Specifically, referring to fig. 2 to 4, in some embodiments of the present invention, the substrate integrated waveguide structure 400 includes a first metal layer 410, a second dielectric layer 420, and a second metal layer 430; the first metal layer 410 is disposed on the lower surface of the first dielectric layer 100, and the first metal layer 410 is provided with a plurality of coupling gaps 411; the second dielectric layer 420 is disposed on the lower surface of the first metal layer 410, and a plurality of metallization holes 421 are disposed at intervals on the second dielectric layer 420; the second metal layer 430 is disposed on the lower surface of the second dielectric layer 420, and the second metal layer 430 is electrically connected to the first metal layer 410 through the metallization hole 421. Specifically, the first metal layer 410 serves as a floor of the vertical polarization feeder 300, forms a microstrip line structure with the vertical polarization feeder 300, and serves as an upper floor of the substrate integrated waveguide structure 400, and the second metal layer 430 serves as a bottom floor of the substrate integrated waveguide structure 400; the coupling slot 411 formed in the first metal layer 410 is used for coupling energy to the radiation patch 200. The utility model discloses in, realized the horizontal polarization of electromagnetic wave energy through substrate integrated waveguide structure 400, substrate integrated waveguide structure 400 has advantages such as miniaturization, easily integration, transmission loss are little.
As shown in fig. 2 and 4, in some embodiments of the present invention, a plurality of radiation patches 200 are disposed side by side on the upper surface of the first dielectric layer 100. Specifically, as shown in fig. 4, the plurality of radiation patches 200 are arranged in parallel along the front-back direction of the first dielectric layer 100, and the radiation patches 200 have a rectangular or square structure. In practical applications, the length and width of the radiation patches 200 are about one-half of the waveguide wavelength of the first dielectric layer 100, the distance between every two adjacent radiation patches 200 is one waveguide wavelength of the first dielectric layer 100, and the length of the vertically polarized feed line 300 between the adjacent radiation patches 200 is close to one waveguide wavelength, so as to ensure that the currents on the radiation patches 200 are in phase.
As shown in fig. 2 and 4, in some embodiments of the present invention, the plurality of coupling slits 411 are sequentially distributed in a staggered manner on both sides of the symmetry axis of the plurality of radiation patches 200 along the arrangement direction of the plurality of radiation patches 200, and each radiation patch 200 corresponds to one coupling slit 411. Specifically, in the present invention, the coupling slot 411 has a rectangular structure, and the length direction of the coupling slot 411 is the same as the arrangement direction of the plurality of radiation patches 200. By sequentially distributing the coupling slots 411 on the left side and the right side of the axis in a staggered manner, a 180-degree phase difference can be introduced into the adjacent coupling slots 411, so that electromagnetic waves coupled by the coupling slots 411 are in the same phase.
In some embodiments of the present invention, the distance between every two adjacent metallized holes 421 is less than twice the diameter of the metallized holes 421. By such an arrangement, the electromagnetic shielding performance of the substrate-integrated waveguide structure 400 can be better ensured. As shown in fig. 4, there are a row of metallized holes 421 on the left and right sides of the radiation patch 200, and the distance between the two rows of metallized holes 421 should be greater than one-half of the operating wavelength. In practical applications, the waveguide wavelength of the main mode of the electromagnetic wave in the substrate-integrated waveguide structure 400 is required to be twice as long as the waveguide wavelength of the first layer of medium 100, so the distance between adjacent radiation patches 300 should be equal to the waveguide wavelength of half of the substrate-integrated waveguide structure 400.
As shown in fig. 2, in some embodiments of the present invention, an impedance transformer 500 is connected to the input end of the vertically polarized feed line 300. The impedance transformer 500 generally adopts a quarter-wave impedance transformer, and functions to transform the input impedance of the antenna to the same impedance as the feed source, thereby achieving the effect of impedance matching.
As shown in fig. 2, in some embodiments of the present invention, the time input of first metal layer 410 is connected to a converter 412. The converter 412 is used to convert the electromagnetic wave from the electromagnetic wave mode of the microstrip line/strip line to the waveguide mode in the substrate integrated waveguide structure 400, and simultaneously convert the input impedance of the vertical polarization end to be the same as the feed source, thereby improving the applicability of the dual-polarized antenna.
As shown in fig. 5, according to the dual-polarized array antenna of the embodiment of the second aspect of the present invention, the transmitting antennas and the receiving antennas include a plurality of transmitting antennas and a plurality of receiving antennas electrically connected to each other, and the dual-polarized antenna of the embodiment of the first aspect of the present invention is adopted. Specifically, as shown in fig. 5, in the present invention, the dual-polarized array antenna includes two transmitting antennas TX1 and TX2 and four receiving antennas RX1 to RX4, and of course, the number of the transmitting antennas and the number of the receiving antennas may be different, and the specific number is not limited. In order to meet the requirement of a signal processing algorithm of a radar system, the distance between every two adjacent receiving antennas is half of the working wavelength d, the distance between every two adjacent transmitting antennas is twice of the working wavelength 4d, and a virtual antenna array with one transmitting antenna and eight receiving antennas is formed, so that the function of radar multi-target identification is realized, and the effect of high-precision and unambiguous angle measurement is realized.
According to the utility model discloses radar system of third aspect embodiment through adopting above-mentioned dual polarization array antenna, can obtain the polarization information of a plurality of dimensions to realize the effect of high accuracy, no fuzzy angle measurement, be favorable to promoting the discernment ability of radar to the target.
In the description herein, references to the description of the term "one embodiment," "a further embodiment," "some specific embodiments," or "some examples," etc., mean that a particular feature, structure, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A dual polarized antenna, comprising:
a first dielectric layer;
the plurality of radiation patches are mutually connected in series and arranged on the upper surface of the first medium layer, and every two adjacent radiation patches are connected through a vertical polarization feeder line;
the substrate integrated waveguide structure is arranged at the lower end of the first medium layer, a plurality of coupling gaps are formed in the substrate integrated waveguide structure, and the substrate integrated waveguide structure is used for coupling electromagnetic waves to the radiation patch through the coupling gaps so that the radiation patch radiates horizontally polarized electromagnetic waves.
2. The dual polarized antenna of claim 1, wherein the substrate-integrated waveguide structure comprises:
the first metal layer is arranged on the lower surface of the first medium layer, and a plurality of coupling gaps are formed in the first metal layer;
the second dielectric layer is arranged on the lower surface of the first metal layer, and a plurality of metalized holes are formed in the second dielectric layer at intervals;
and the second metal layer is arranged on the lower surface of the second dielectric layer and is electrically connected with the first metal layer through the metallization hole.
3. The dual polarized antenna of claim 2, wherein a plurality of the radiating patches are disposed side by side on the upper surface of the first dielectric layer.
4. The dual polarized antenna of claim 3, wherein each two adjacent radiating patches are spaced apart by one waveguide wavelength of the first dielectric layer.
5. The dual polarized antenna of claim 3, wherein the plurality of coupling slots are sequentially distributed in a staggered manner on two sides of a symmetry axis of the plurality of radiation patches along an arrangement direction of the plurality of radiation patches, and each radiation patch corresponds to one coupling slot.
6. The dual polarized antenna of any one of claims 3 to 5, wherein the coupling slot has a rectangular structure, and a length direction of the coupling slot is the same as an arrangement direction of the plurality of radiation patches.
7. The dual polarized antenna of claim 2, wherein the pitch of each adjacent two of the metallized holes is less than twice the diameter of the metallized hole.
8. The dual polarized antenna of claim 1, wherein an impedance transformer is connected to an input of the vertically polarized feed line.
9. A dual polarized array antenna comprising a plurality of transmitting antennas and a plurality of receiving antennas electrically connected to each other, wherein the transmitting antennas and the receiving antennas are the dual polarized antennas according to any one of claims 1 to 8.
10. A radar system comprising the dual polarized array antenna of claim 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120622938.2U CN214477884U (en) | 2021-03-26 | 2021-03-26 | Dual-polarized antenna, dual-polarized array antenna and radar system |
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| CN202120622938.2U CN214477884U (en) | 2021-03-26 | 2021-03-26 | Dual-polarized antenna, dual-polarized array antenna and radar system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023217236A1 (en) * | 2022-05-12 | 2023-11-16 | 华南理工大学 | Antenna unit, subarray and millimeter-wave high-isolation large-angle phased array antenna |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023217236A1 (en) * | 2022-05-12 | 2023-11-16 | 华南理工大学 | Antenna unit, subarray and millimeter-wave high-isolation large-angle phased array antenna |
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