CN113013639A - Broadband wide-angle scanning phased array unit and array structure - Google Patents
Broadband wide-angle scanning phased array unit and array structure Download PDFInfo
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- CN113013639A CN113013639A CN202110174132.6A CN202110174132A CN113013639A CN 113013639 A CN113013639 A CN 113013639A CN 202110174132 A CN202110174132 A CN 202110174132A CN 113013639 A CN113013639 A CN 113013639A
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- 239000011229 interlayer Substances 0.000 claims abstract description 77
- 230000005855 radiation Effects 0.000 claims abstract description 29
- 230000001808 coupling effect Effects 0.000 claims abstract description 21
- 230000008878 coupling Effects 0.000 claims abstract description 19
- 238000010168 coupling process Methods 0.000 claims abstract description 19
- 238000005859 coupling reaction Methods 0.000 claims abstract description 19
- 239000000758 substrate Substances 0.000 claims abstract description 16
- 239000002184 metal Substances 0.000 claims description 17
- 230000005540 biological transmission Effects 0.000 claims description 4
- 125000006850 spacer group Chemical group 0.000 description 30
- 238000010586 diagram Methods 0.000 description 16
- 239000010410 layer Substances 0.000 description 14
- 230000005684 electric field Effects 0.000 description 11
- 238000009826 distribution Methods 0.000 description 10
- 230000005284 excitation Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005388 cross polarization Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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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
- 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
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
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Abstract
The invention discloses a broadband wide-angle scanning phased array unit and an array structure, wherein the broadband wide-angle scanning phased array unit comprises: the broadband unit structure comprises a dielectric substrate, a feed structure and a radiation area, wherein the feed structure and the radiation area are arranged on the dielectric substrate and are communicated through a coupling slot line; and the super-surface interlayer comprises a first interlayer, a second interlayer and a third interlayer, the first interlayer is arranged at one end of the dielectric substrate close to the radiation area, the second interlayer and the third interlayer are arranged at two sides of the first interlayer, and the super-surface interlayer is used for reducing the mutual coupling effect between adjacent broadband unit structures. The invention can reduce the mutual coupling effect of adjacent broadband wide-angle scanning phased array units in the array antenna, so that the achievable broadband wide-angle scanning range is larger, the gain is improved while the high bandwidth is ensured, the working efficiency of the array antenna is further improved, and the array antenna can be widely applied to the technical field of antennas.
Description
Technical Field
The invention relates to the technical field of antennas, in particular to a broadband wide-angle scanning phased array unit and an array structure.
Background
Phased array antennas have wide applications in radar and communication, and with the rapid development of wireless communication technology, higher requirements are put on performance indexes of the phased array antennas, wherein the two most important characteristics required by the phased array antennas are that the phased array antennas have wider operating frequency bands and larger scanning ranges. The phased array antenna is a new antenna form developed on the basis of the array antenna, and the phased array antenna changes the shape of a directional pattern by controlling the feed phase of a radiation unit in the array antenna through a phase shifter, so that the purpose of beam scanning is achieved. Compared with the traditional narrow-band wide-angle scanning phased array, the design of the wide-band wide-angle scanning phased array antenna has great challenge, is necessary research content and development trend, and has wide application space.
When designing a broadband wide-angle scanning phased array, antenna units with broadband wide beams are often designed, and then the arrangement mode of the array is reasonably selected, so that the broadband wide-angle scanning characteristic of the array is realized. However, as the scanning angle of the main beam of the phased array increases, the beam scanning characteristics of the phased array suffer from the problem of increased scanning loss, and it has been proved in the prior art that the mutual coupling effect between adjacent array elements in the phased array and the radiation characteristics of the array elements are two main factors causing the rapid attenuation of the gain.
At present, the following three solutions are roughly provided for the problem of serious gain attenuation under phased array scanning to a large angle: firstly, designing a phased array unit structure with wide beam radiation characteristics, wherein the half-power lobe width of the unit can be used as a key parameter for evaluating the beam scanning range; secondly, wide beam scanning is realized by designing a decoupling feed network; and thirdly, the mutual coupling among the array elements can be reduced by improving the electromagnetic coupling effect among the array elements, particularly by adding decoupling walls among the array elements, introducing polarization conversion patches, changing the inherent field distribution of each array element and the like. However, although the three schemes can improve the radiation characteristics of the array elements to a certain extent or reduce the mutual coupling effect between adjacent array elements, the achievable scanning angle is still small, and the working efficiency of the broadband wide-angle scanning phased array antenna is limited.
Disclosure of Invention
The present invention aims to solve at least to some extent one of the technical problems existing in the prior art.
To this end, it is an object of embodiments of the present invention to provide a wideband wide angle scanning phased array unit.
It is another object of embodiments of the present invention to provide an array structure that can implement wide-band wide-angle scanning.
In order to achieve the technical purpose, the technical scheme adopted by the embodiment of the invention comprises the following steps:
in a first aspect, an embodiment of the present invention provides a wideband wide-angle scanning phased array unit, including:
the broadband unit structure comprises a dielectric substrate, a feed structure and a radiation area, wherein the feed structure and the radiation area are arranged on the dielectric substrate and are communicated through a coupling slot line, and the broadband unit structure is used for realizing transmission and radiation of electromagnetic waves;
the super-surface interlayer comprises a first interlayer, a second interlayer and a third interlayer, the first interlayer is arranged at one end, close to the radiation area, of the medium substrate, the second interlayer and the third interlayer are arranged on two sides of the first interlayer, and the super-surface interlayer is used for reducing the mutual coupling effect between adjacent broadband unit structures.
Further, in one embodiment of the present invention, the surface of the super surface spacer layer is provided with a metal pattern which is periodically arranged.
Further, in an embodiment of the present invention, the first interlayer is disposed on an H-side of the wideband unit structure, the second interlayer and the third interlayer are disposed on an E-side of the wideband unit structure, and both the second interlayer and the third interlayer are disposed perpendicular to the first interlayer.
In a second aspect, an embodiment of the present invention provides an array structure, including:
a metal reflective plate;
the feed network is arranged on the metal reflecting plate;
as in the foregoing first embodiment, there are a plurality of wideband wide-angle scanning phased array units, the wideband wide-angle scanning phased array unit is disposed on the metal reflection plate, and the wideband wide-angle scanning phased array unit is connected to the feed network.
Advantages and benefits of the present 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:
on the first hand, the broadband wide-angle scanning phased-array unit of the embodiment of the invention is provided with super-surface interlayer in the radiation direction of the broadband unit structure, the super-surface interlayer comprises a first interlayer, a second interlayer and a third interlayer, the first interlayer is arranged at one end of the medium substrate close to the radiation area, the second interlayer and the third interlayer are arranged at two sides of the first interlayer, and the mutual coupling effect of adjacent broadband wide-angle scanning phased-array units in the array antenna in the vertical direction and the horizontal direction can be reduced simultaneously through the arrangement of the first interlayer, the second interlayer and the third interlayer, so that the broadband wide-angle scanning range which can be realized by the antenna is larger, the high bandwidth is ensured, the gain is improved, and the working efficiency of the broadband wide-angle scanning phased-array antenna is further improved.
In a second aspect, the array structure of the embodiment of the present invention includes a metal reflection plate, a feed network, and a plurality of wideband wide-angle scanning phased array units, and by limiting the wideband wide-angle scanning phased array units, the array structure of the embodiment of the present invention can simultaneously reduce mutual coupling effects of adjacent wideband wide-angle scanning phased array units in the array antenna in the vertical direction and the horizontal direction, so that the antenna can achieve a wider wideband wide-angle scanning range, and improve gain while ensuring high bandwidth, thereby improving the working efficiency of the wideband wide-angle scanning phased array antenna.
Drawings
In order to more clearly illustrate the technical solution in the embodiment of the present invention, the following description is made on the drawings required to be used in the embodiment of the present invention, and it should be understood that the drawings in the following description are only for convenience and clarity of describing some embodiments in the technical solution of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a wideband wide-angle scanning phased array unit according to an embodiment of the present invention;
fig. 2(a) is a schematic view of an amplitude-frequency characteristic curve of an E-plane of a wideband wide-angle scanning phased array unit under a period boundary condition according to an embodiment of the present invention;
fig. 2(b) is a schematic diagram of an amplitude-frequency characteristic curve of an H-plane of a wideband wide-angle scanning phased array unit under a period boundary condition according to an embodiment of the present invention;
FIG. 3(a) is a schematic diagram of the electric field distribution of adjacent phased array units in the E plane in the prior art;
fig. 3(b) is a schematic diagram of an electric field distribution of adjacent wideband wide-angle scanning phased array units in an E plane according to an embodiment of the present invention;
FIG. 3(c) is a schematic diagram of the electric field distribution of adjacent phased array units in the H plane in the prior art;
fig. 3(d) is a schematic diagram of an electric field distribution in an H plane of adjacent wideband wide-angle scanning phased array units according to an embodiment of the present invention;
fig. 4(a) is a schematic diagram of a mutual coupling variation of adjacent wideband wide-angle scanning phased array units in an E plane according to an embodiment of the present invention;
fig. 4(b) is a schematic diagram of a variation of mutual coupling of adjacent wideband wide-angle scanning phased array units in the H plane according to an embodiment of the present invention;
fig. 5(a) is a schematic diagram of beam scanning characteristics of an E-plane array structure at an operating frequency of 10GHz according to an embodiment of the present invention;
fig. 5(b) is a schematic diagram of beam scanning characteristics of the E-plane array structure at an operating frequency of 12.5GHz according to the embodiment of the present invention;
fig. 5(c) is a schematic diagram of beam scanning characteristics of the H-plane array structure at an operating frequency of 11.2GHz according to the embodiment of the present invention;
fig. 5(d) is a schematic diagram of beam scanning characteristics of the H-plane array structure at an operating frequency of 12.5GHz according to the embodiment of the present invention.
Reference numerals:
10. a broadband unit structure; 101. a dielectric substrate; 102. a feed structure; 103. a radiation region; 20. a super-surface spacer layer; 201. a first barrier layer; 202. a second barrier layer; 203. a third spacer layer.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, the meaning of a plurality is two or more, if there is a description to the first and the second for the purpose of distinguishing technical features, it is not understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the precedence of the indicated technical features. Furthermore, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art.
Referring to fig. 1, an embodiment of the present invention provides a wideband wide-angle scanning phased array unit, which specifically includes:
the broadband unit structure 10, the broadband unit structure 10 includes a dielectric substrate 101, a feed structure 102 and a radiation region 103, the feed structure 102 and the radiation region 103 are disposed on the dielectric substrate 101, the feed structure 102 and the radiation region 103 are communicated through a coupling slot line, and the broadband unit structure 10 is used for realizing transmission and radiation of electromagnetic waves;
the super-surface interlayer 20, the super-surface interlayer 20 includes a first interlayer 201, a second interlayer 202 and a third interlayer 203, the first interlayer 201 is disposed at one end of the dielectric substrate 101 close to the radiation region 103, the second interlayer 202 and the third interlayer 203 are disposed at two sides of the first interlayer 201, and the super-surface interlayer 20 is used for reducing mutual coupling effect between adjacent wideband unit structures 10.
Specifically, the broadband unit structure 10 of the embodiment of the present invention is an antenna unit structure having broadband radiation characteristics, and is configured to implement transmission and radiation of electromagnetic waves. In the embodiment of the invention, a broadband Vivaldi antenna structure is adopted as the broadband unit structure 10, and the Vivaldi antenna is adopted as a traveling wave antenna, has broadband and wide beam characteristics, is usually used for constructing broadband wide-angle phased arrays, but the scanning angle of the traditional Vivaldi array is generally within 50 degrees, and the active standing wave ratio and the cross polarization of the traditional Vivaldi array deteriorate severely when the array is scanned to a large angle.
As shown in fig. 1, the wideband unit structure 10 according to the embodiment of the present invention includes a dielectric substrate 101, and a feeding structure 102 and a radiation region 103 disposed on the dielectric substrate 101, where the radiation region 103 is a tapered slot structure, a first spacer 201 is disposed at an end of the radiation region 103, and a second spacer 202 and a third spacer 203 are disposed on two sides of the first spacer 201.
It is understood that in the array structure formed by the wideband wide angle scanning phased array units according to the embodiment of the present invention, the super surface spacers 20 are distributed between adjacent wideband wide angle scanning phased array units, so that the mutual coupling effect between adjacent array elements in the vertical direction can be reduced by the first spacers 201, and the mutual coupling effect between adjacent array elements in the horizontal direction can be reduced by the second spacers 202 and the third spacers 203. Generally, as the beam scanning angle increases, the relative phase difference of excitation of each array element increases, which results in a large change of the coupling phase between the array elements, thereby causing active impedance mismatch and a reduction of the scanning beam gain, and therefore reducing the mutual coupling effect between adjacent array elements is a key to realize wide-angle scanning. The super-surface material with proper size can be used as the super-surface interlayer 20, so that the coupling between adjacent array elements is effectively reduced, the impedance matching of the broadband wide-angle scanning phased array unit on the E surface and the H surface is realized, and the wide-angle scanning is further realized.
The embodiment of the invention has simple structure, can simultaneously reduce the mutual coupling effect of adjacent broadband wide-angle scanning phased-array units in the array antenna in the vertical direction and the horizontal direction, thereby enabling the achievable broadband wide-angle scanning range of the antenna to be larger, improving the gain while ensuring high bandwidth and further improving the working efficiency of the broadband wide-angle scanning phased-array antenna.
Referring to fig. 1, as a further alternative embodiment, the surface of the super surface spacer layer 20 is provided with a periodically arranged metal pattern.
As shown in fig. 1, the super surface spacer 20 of the embodiment of the present invention has a periodically arranged metal cross pattern on the surface thereof for improving the isolation effect of the super surface spacer 20 on the mutual coupling effect.
Optionally, the dimensions of the wideband cell structure 10, the super-surface spacers 20, and the metal pattern are determined according to performance requirements such as the frequency of the phased array.
Further as an alternative embodiment, the first spacer layer 201 is disposed on the H-side of the wideband-cell structure 10, the second spacer layer 202 and the third spacer layer 203 are disposed on the E-side of the wideband-cell structure 10, and both the second spacer layer 202 and the third spacer layer 203 are disposed perpendicular to the first spacer layer 201.
Specifically, in the embodiment of the present invention, as shown in fig. 1, the xoz plane is an H plane, that is, a plane where the magnetic field vector is located; the yoz plane is the E plane, i.e. the plane where the electric field vector is located.
It will be appreciated that the super surface spacers 20 on the E-plane and the H-plane are perpendicular to each other, and that the performance of the H-plane (E-plane) is not affected by the super surface spacers 20 on the E-plane (H-plane). The super-surface spacer layer 20 is disposed on both the E-plane and the H-plane of the wideband unit structure 10 for simultaneously realizing wide-angle scanning of the E-plane and the H-plane.
In the embodiment of the invention, the super-surface interlayer 20 which is perpendicular to each other is arranged on the E surface and the H surface of the broadband unit structure 10, so that the mutual coupling effect between adjacent array elements of an array of the E surface and the H surface can be improved, the broadband wide-angle scanning characteristics of the array of the E surface and the H surface can be realized, and the radiation performance of the H surface (E surface) cannot be influenced by the E surface (H surface) interlayer.
Fig. 2 shows an amplitude-frequency characteristic curve of a wideband wide-angle scanning phased array unit under a period boundary condition according to an embodiment of the present invention. It should be noted that the super-surface spacers added on the E-plane and H-plane of Vivaldi units are perpendicular to each other, and the properties of the E-plane (H-plane) are not affected by the H-plane (E-plane) super-surface spacers. The amplitude-frequency characteristic curves of the wide-bandwidth wide-angle scanning phased array unit in the E plane and the H plane under the condition of the cycle boundary are respectively shown in fig. 2(a) and fig. 2(b), and it can be seen from fig. 2 that the wide-bandwidth wide-angle scanning phased array unit of the embodiment of the invention has wide frequency characteristic and is insensitive to the incidence angle.
Fig. 3 shows an electric field distribution diagram of an adjacent phased array unit in the prior art and an electric field distribution diagram of an adjacent wideband wide-angle scanning phased array unit in the embodiment of the present invention, and electric field distributions before and after adding super surface spacers on the E-plane and the H-plane can be compared through fig. 3. In FIG. 3, the excitation signal is added to the port N, and the mutual coupling influence of the adjacent array elements can be evaluated through the induced electric fields in the adjacent array elements N-1 and N + 1. Fig. 3(a) and 3(b) show the electric field distribution comparison before and after the super surface interlayer is added on the E surface, it can be seen that before the super surface interlayer is added, the adjacent array elements are directly coupled, so that a strong mutual coupling effect is achieved, and after the super surface interlayer is added, the direct coupling path of the adjacent array elements is broken, so that the mutual coupling effect between the adjacent array elements is effectively reduced. Fig. 3(c) and 3(d) show the electric field distribution comparison before and after the super surface interlayer is added to the H surface, and it can also be observed that the mutual coupling effect between adjacent array elements of the H surface can be effectively reduced after the super surface interlayer is added.
Fig. 4 is a schematic diagram showing the mutual coupling variation of adjacent wideband wide-angle scanning phased-array units in the E-plane and the H-plane according to an embodiment of the present invention, and fig. 4 includes a comparison of the mutual coupling curves before and after adding the super-surface spacer, and at different super-surface spacer heights. FIG. 4(a) shows the mutual coupling curve of adjacent array elements of the E-plane, and it can be seen that the height of the super-surface spacer increases to λ0/2, mutual coupling influence between adjacent array elements is reduced continuouslyThe height of the super surface interlayer is more than lambda0After/2, the mutual coupling between adjacent array elements can increase again, which shows that the optimal height of the super surface interlayer added on the E surface is lambda 02; also, the same height (. lamda.) is given in the graph (a)0And/2) comparing the lower super-surface interlayer with the metal interlayer, the effect of reducing the mutual coupling effect of the super-surface interlayer is obviously better than that of the metal interlayer. Graph (b) shows the mutual coupling change curve of adjacent array elements of the E surface, and the distance between the surfaces increases to 2 lambda along with the increase of the height of the super surface distance layer05, the mutual coupling between array elements is reduced continuously and is more than 2 lambda0The mutual coupling is enhanced again after 5, which shows that the optimal height of the super surface interlayer added on the H surface is 2 lambda0/5。
An embodiment of the present invention further provides an array structure, including:
a metal reflective plate;
the feed network is arranged on the metal reflecting plate;
as for the wideband wide-angle scanning phased array unit in the above embodiment, there are a plurality of wideband wide-angle scanning phased array units, the wideband wide-angle scanning phased array unit is disposed on the metal reflection plate, and the wideband wide-angle scanning phased array unit is connected to the feed network.
By limiting the broadband wide-angle scanning phased-array units, the array structure provided by the embodiment of the invention can simultaneously reduce the mutual coupling effect of adjacent broadband wide-angle scanning phased-array units in the array antenna in the vertical direction and the horizontal direction, so that the antenna can realize a larger broadband wide-angle scanning range, the high bandwidth is ensured, the gain is improved, and the working efficiency of the broadband wide-angle scanning phased-array antenna is further improved.
Fig. 5 is a schematic diagram of beam scanning characteristics of the array structure of the E-plane and the H-plane at different operating frequencies, which is obtained by adding excitation signals with certain phase differences to all ports. The beam scanning characteristics of the E-plane array structure at 10GHz and 12.5GHz operating frequencies are shown in fig. 5(a) and 5(b), respectively, and it can be seen that the E-plane array structure can achieve-78 ° to 78 ° beam scanning at both frequencies within the 3dB gain fluctuation range, and the same scanning characteristics can be obtained within this frequency range. The beam scanning characteristics of the H-plane array structure at the operating frequencies of 11.2GHz and 12.5GHz are shown in fig. 5(c) and 5(d), respectively, and it can be seen that the H-plane array structure can achieve beam scanning of-69 ° to 69 ° at both frequencies within the 3dB gain fluctuation range, and the same beam scanning characteristics can be obtained within the frequency range. The wide-band and wide-angle scanning characteristics of the embodiment of the invention are verified through the beam scanning results of the array structures of the plane E and the plane H in fig. 5 at different frequencies, and the feasibility of the embodiment of the invention is verified.
In the foregoing description of the specification, reference to the description of "one embodiment/example," "another embodiment/example," or "certain embodiments/examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms 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.
While the preferred embodiments of the present invention have been illustrated and described, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (4)
1. A wideband wide angle scanning phased array unit, comprising:
the broadband unit structure comprises a dielectric substrate, a feed structure and a radiation area, wherein the feed structure and the radiation area are arranged on the dielectric substrate and are communicated through a coupling slot line, and the broadband unit structure is used for realizing transmission and radiation of electromagnetic waves;
the super-surface interlayer comprises a first interlayer, a second interlayer and a third interlayer, the first interlayer is arranged at one end, close to the radiation area, of the medium substrate, the second interlayer and the third interlayer are arranged on two sides of the first interlayer, and the super-surface interlayer is used for reducing the mutual coupling effect between adjacent broadband unit structures.
2. A wideband wide angle scanning phased array unit as claimed in claim 1, wherein: and metal patterns which are periodically arranged are arranged on the surface of the super-surface interlayer.
3. A wideband wide angle scanning phased array unit as claimed in claim 1, wherein: the first interlayer is arranged on the H surface of the broadband unit structure, the second interlayer and the third interlayer are arranged on the E surface of the broadband unit structure, and the second interlayer and the third interlayer are both perpendicular to the first interlayer.
4. An array structure, comprising:
a metal reflective plate;
the feed network is arranged on the metal reflecting plate;
the wide-angle scanning broadband phased array unit according to any one of claims 1 to 3, wherein the wide-angle scanning broadband phased array unit is provided in plurality, the wide-angle scanning broadband array unit is provided on the metal reflection plate, and the wide-angle scanning broadband array unit is connected to the feed network.
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| CN113690636A (en) * | 2021-07-12 | 2021-11-23 | 华南理工大学 | Millimeter wave wide-angle scanning phased-array antenna based on super surface |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113690636A (en) * | 2021-07-12 | 2021-11-23 | 华南理工大学 | Millimeter wave wide-angle scanning phased-array antenna based on super surface |
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