CN114498030A - Multi-frequency high-isolation millimeter wave phased array antenna based on multi-path cancellation - Google Patents

Multi-frequency high-isolation millimeter wave phased array antenna based on multi-path cancellation Download PDF

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Publication number
CN114498030A
CN114498030A CN202210093358.8A CN202210093358A CN114498030A CN 114498030 A CN114498030 A CN 114498030A CN 202210093358 A CN202210093358 A CN 202210093358A CN 114498030 A CN114498030 A CN 114498030A
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grounding
metal
isolation
dielectric substrate
millimeter wave
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杨琬琛
刘洽广
车文荃
薛泉
谷礼政
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South China University of Technology SCUT
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South China University of Technology SCUT
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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
    • H01Q1/521—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas
    • 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
    • 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
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/0006—Particular feeding systems
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/50—Feeding or matching arrangements for broad-band or multi-band operation

Abstract

The invention discloses a multi-frequency high-isolation millimeter wave phased-array antenna based on multipath cancellation, which comprises a first layer of dielectric substrate, a second layer of dielectric substrate and a third layer of dielectric substrate which are stacked, wherein the upper surface and the lower surface of the first layer of dielectric substrate are respectively provided with magnetoelectric dipole antenna units and a metal floor which are arranged in an array manner, the second layer of dielectric substrate is provided with a feed layer, the third layer of dielectric substrate is provided with a GCPW (grounded phase conductor) switching layer, the edges of two sides of the upper surface of the first layer of dielectric substrate are provided with two metal grounding column walls, and the magnetoelectric dipole antenna units are arranged between the two metal grounding column walls; the inherent coupling paths are counteracted by arranging a plurality of coupling cancellation paths in the first layer dielectric substrate. Compared with the traditional high-isolation antenna, the decoupling structure of the invention is simple, and the decoupling of the multi-frequency antenna can be realized without an additional section. And a multi-frequency high isolation millimeter wave phased array antenna based on multi-path cancellation.

Description

Multi-frequency high-isolation millimeter wave phased array antenna based on multi-path cancellation
Technical Field
The invention relates to the field of communication, in particular to a multi-frequency high-isolation millimeter wave phased array antenna based on multipath cancellation.
Background
With the development of the fifth generation wireless communication technology, the millimeter wave array antenna is a popular research topic. The millimeter wave array antenna has the advantages of high bandwidth, high speed, low time delay, small size and the like, and is widely applied to application occasions such as base station antennas, indoor communication, fixed-point communication and the like. However, the millimeter wave antenna array has the problems of serious surface wave, over-high coupling and the like, and the radiation efficiency and the scanning angle of the array antenna are seriously deteriorated. In order to improve the coupling between array antennas, the conventional high isolation method is generally applicable to binary arrays and is difficult to expand into large array designs. In recent years, an array antenna using a decoupling surface can achieve high isolation performance well. However, this decoupling structure requires that the decoupling surface be placed at a specific position above the antenna array, and this height is determined by both the reflection phase of the decoupling surface and the inherent coupling phase. However, the use of such decoupling surfaces can introduce additional profiles, design complications, and the like. This poses a great challenge to the overall design of the antenna array, and is not suitable for antenna design in a compact environment. The magnetoelectric dipole antenna unit is used as a broadband low-profile radiation antenna and has wide application in phased array antennas.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a multi-path offset multi-frequency high-isolation millimeter wave phased array antenna.
The invention has the characteristics of high isolation, small size and simple structure, and can ensure that the port isolation and the scanning performance of the phased array antenna are improved.
The invention adopts the following technical scheme:
a multi-frequency high-isolation millimeter wave phased-array antenna based on multipath cancellation comprises a first dielectric substrate, a second dielectric substrate and a third dielectric substrate which are stacked, wherein magnetoelectric dipole antenna units and metal floors which are arranged in an array mode are arranged on the upper surface and the lower surface of the first dielectric substrate respectively, a feed layer is arranged on the second dielectric substrate, a GCPW (grounded phase conductor) switching layer is arranged on the third dielectric substrate, two metal grounding column walls are arranged on the edges of the two sides of the upper surface of the first dielectric substrate, and the magnetoelectric dipole antenna units are arranged between the two metal grounding column walls;
when two magnetoelectric dipole antenna units are arranged, a first decoupling path is arranged between the adjacent magnetoelectric dipole antenna units;
when the number of the magnetoelectric dipole antenna units is at least three, a first decoupling path is arranged between the adjacent magnetoelectric dipole antenna units, and second decoupling paths are arranged at two ends of other magnetoelectric dipole antenna units except two magnetoelectric dipole antenna units close to the metal grounding column wall.
Furthermore, decoupling grounding columns are arranged on two sides of each magnetoelectric dipole antenna unit.
Further, two first decoupling paths are arranged between adjacent magnetoelectric dipole antenna units and are symmetrically arranged relative to the longitudinal axis of the first-layer dielectric substrate.
Further, the first decoupling path comprises m first ground posts, n first metal strips and o second metal strips;
when m is 3, n is 1, o is 1, two first grounding columns are arranged along the center of the first metal strip symmetrically, a third first grounding column is arranged at the center of the first metal strip, and the three first grounding columns are connected through the second metal strip;
when m is larger than 3, n is larger than or equal to 2, and o is larger than or equal to 2, the n first metal strips are arranged in parallel, each first metal strip is provided with two or three first grounding columns, when the first metal strips are provided with two first grounding columns, the two first grounding columns are symmetrically arranged along the center, and the second metal strip is used for connecting the two first grounding columns; when the first metal strip is provided with three first grounding columns, the first metal strip is arranged according to the condition that m is 3, and the second metal strip is used for connecting the three first grounding columns.
Further, the second decoupling path comprises at least two second ground posts and at least one third metal strip;
when the two second grounding posts and the third metal strip are included, the two second grounding posts are symmetrically arranged along the center of the third metal strip;
when the grounding structure comprises more than two second grounding posts and a plurality of third metal strips, the plurality of third metal strips are arranged in parallel, and every two second grounding posts are symmetrically arranged along the center point of the third metal strips.
Further, the metal floor is provided with an H-shaped gap.
Furthermore, the feed layer sets up shielding metal wall, shielding metal wall includes median and many fourth ground connection posts, median and many fourth ground connection post symmetry are placed around H shape gap, constitute the cavity.
Furthermore, the magnetoelectric dipole antenna unit comprises four rectangular metal patches with cut corners and 12 third grounding columns, wherein each rectangular metal patch is provided with three third grounding columns, and an H-shaped gap is adopted for excitation.
Further, the feed layer comprises a strip line feed, a microstrip line feed, a substrate integrated waveguide feed network or a coplanar waveguide feed.
Further, the first metal strip and the second metal strip are pi-shaped, n-shaped, H-shaped, L-shaped, M-shaped, double-T-shaped, T-shaped or three-T-shaped.
The invention has the beneficial effects that:
(1) the invention comprises a decoupling path based on a coupling offset path, a magnetoelectric dipole antenna and a feed network. Because a plurality of simple decoupling paths are adopted and placed at different positions to respectively counteract the inherent coupling between the array elements at different frequencies, the interference among the paths is reduced as much as possible, the isolation among the antenna units or the antenna sub-arrays at the multi-frequency section is enhanced, the active S parameters at different frequencies and the scanning capability of the array antenna are improved, and the array antenna has the advantages of compact structure and simple design.
(2) The invention has the expandable characteristic by adopting the decoupling path based on the coupling offset path, and can be widely applied to the decoupling of arrays with different quantities and different polarizations.
(3) The invention can control the amplitude and phase of the introduced coupling quantity by adjusting the height, length and width of the decoupling path, thereby realizing the enhancement of the isolation between the antenna units or the antenna subarrays.
(4) The invention realizes broadband matching characteristic by adopting the magnetoelectric dipole antenna.
(5) The invention has simple structure, easy processing and relatively low cost and weight. Thus, mass production is possible.
Drawings
FIG. 1 is a three-dimensional schematic diagram of a multi-frequency high isolation millimeter wave phased array antenna of the present invention;
fig. 2(a) is a top view of the magnetoelectric dipole antenna element and the feed layer in fig. 1;
FIGS. 2(b) and 2(c) are schematic diagrams of the dimension parameters of the first decoupled path;
FIG. 3(a) is a diagram of the result of decoupling the S parameter of the low frequency band of the multi-frequency high-isolation millimeter wave phased array antenna based on multi-path cancellation according to the present invention;
FIG. 3(b) is a diagram showing the result of decoupling the S parameter of the high frequency band of the multi-frequency high isolation millimeter wave phased array antenna based on multi-path cancellation according to the present invention;
FIG. 4(a) is a diagram showing the result of the S parameter of the low frequency band of the multi-frequency high-isolation millimeter wave phased array antenna based on multi-path cancellation before decoupling;
FIG. 4(b) is a diagram showing the result of the S parameter of the high frequency band of the multi-frequency high isolation millimeter wave phased array antenna based on multi-path cancellation before decoupling;
FIG. 5 is a graph of the results of a multi-frequency high isolation millimeter wave phased array antenna based on multi-path cancellation of the present invention scanning to a maximum scan angle at 25 GHz;
FIG. 6 is a graph of the results of a multi-frequency high isolation millimeter wave phased array antenna based on multi-path cancellation scanning at 27GHz to a large scan angle in accordance with the present invention;
FIG. 7 is a graph of the results of a multi-frequency high isolation millimeter wave phased array antenna based on multi-path cancellation of the present invention scanning at 29GHz to a large scan angle;
FIG. 8 is a graph of the results of a multi-frequency high isolation millimeter wave phased array antenna based on multi-path cancellation of the present invention scanning at 37GHz to a large scan angle;
FIG. 9 is a graph of the results of a multi-frequency high isolation millimeter wave phased array antenna based on multi-path cancellation of the present invention scanning at 40GHz to a large scan angle;
FIG. 10 is a graph of the results of a multi-frequency high isolation millimeter wave phased array antenna based on multi-path cancellation of the present invention scanning at 42GHz to a large scan angle;
fig. 11(a) is an active S parameter curve of the multi-frequency high-isolation millimeter wave phased array antenna based on multi-path cancellation scanned to the maximum angle in the low frequency band according to the present invention;
fig. 11(b) is an active S-parameter curve of the multi-frequency high-isolation millimeter wave phased array antenna based on multipath cancellation scanning to the maximum angle in the high frequency band.
Detailed Description
The present invention will be described in further detail with reference to examples and drawings, but the present invention is not limited to these examples.
Examples
The XYZ axes in this embodiment are shown in fig. 1, where the X axis is vertical and the Y axis is horizontal. In this embodiment, the two sides are along the X-axis direction, and the upper and lower ends are along the Y-axis direction.
As shown in fig. 1 and fig. 2(a), a multi-frequency high-isolation millimeter wave phased-array antenna based on multipath cancellation includes a first dielectric substrate, a second dielectric substrate and a third dielectric substrate, which are stacked, wherein N magnetoelectric dipole antenna units 1 and a metal floor 2 are arranged on the upper and lower surfaces of the first dielectric substrate respectively, the second dielectric substrate is provided with a feed layer 11, and the third dielectric substrate is provided with a GCPW transition layer 20.
Further, the present embodiment includes 1 × 4 magnetoelectric dipole antenna elements 1 arranged along the X-axis direction, a first decoupling path 3 is arranged between adjacent magnetoelectric dipole antenna elements 1, the decoupling path is arranged on a horizontal central axis in the middle of two adjacent magnetoelectric dipole antenna elements 1, every two are in a group, and are symmetrically arranged along two sides of a longitudinal central axis, two metal grounding column walls 13 are arranged on edges of two sides of the upper surface of the first dielectric substrate, and the magnetoelectric dipole antenna element 1 is arranged between the two metal grounding column walls 13;
in particular, the first decoupling path 3 comprises m first grounding studs 4, n first metal strips 5 and o second metal strips 6;
in the present embodiment, when m is 3, n is 1, and o is 1, two first grounding studs 4 are arranged symmetrically along the center of the first metal strip 5, a third first grounding stud 4 is arranged at the center of the first metal strip 5, and the three first grounding studs 4 are connected by the second metal strip 5;
when m is larger than 3, n is larger than or equal to 2, and o is larger than or equal to 2, the n first metal strips 5 are placed in parallel, each first metal strip 5 is provided with two or three first grounding posts 4, when the first metal strips 5 are provided with two first grounding posts, the two first grounding posts 4 are symmetrically arranged along the center, and the second metal strip 6 is used for connecting the two first grounding posts; when the first metal strip 5 is provided with three first grounding posts 4, the second metal strip 6 is provided when m is 3, and is used for connecting the three first grounding posts 4.
Such as: when m is 5, two first metal strips 5 are arranged in parallel, three first grounding poles 4 are arranged on one first metal strip 5, and a second metal strip 6 is connected with the three first grounding poles 4; the other two metal strips are arranged on the other first metal strip 5, and the other second metal strip 6 is connected with the two first grounding posts 4.
When m is 7, the three first metal strips 5 are arranged in parallel, and the first grounding poles are arranged in groups according to 2, 2 and 3.
The first grounding pole 4 can be a cuboid or a cylinder; the shapes of the first metal strip 5 and the second metal strip 6 can be pi-shaped, n-shaped, H-shaped, L-shaped or M-shaped, double T-shaped, T-shaped or three T-shaped.
The plurality of first ground studs 4 and the plurality of first metal strips 5 and the plurality of second metal strips 6 form a coupling cancellation path, which can provide a higher isolation. The first decoupling path 3 enables high isolation between ports at low frequency band in the case of a compact array of elements of the phased array antenna. The isolation of the low frequency band can reach 20 dB.
Further, as shown in fig. 1 and fig. 2(a), in the present embodiment, in addition to the magneto-electric dipole antenna units 1 disposed at the two side edges, second decoupling paths 7 are disposed at two ends of other magneto-electric dipole antenna units 1.
Specifically, a second decoupling path 7 is symmetrically disposed at both ends, i.e., in the Y direction, of each magneto-electric dipole antenna element 1.
When the magnetoelectric dipole antenna elements 1 are arranged in a 1 × 2 array, the second decoupling path 7 is not required.
The second decoupling path 7 comprises at least two second grounding posts 9 and at least one third metal strip 8;
when two second grounding posts 9 and a third metal strip 8 are included, the two second grounding posts 9 are symmetrically arranged along the center of the third metal strip 8;
when the number of the second grounding posts 9 is an even number greater than 2, the plurality of third metal strips 8 are arranged in parallel, and every two second grounding posts 9 are symmetrically arranged along the center point of the third metal strips 8.
The second grounding column 9 can be a cuboid or a cylinder; the third metal strip 8 may be in the shape of I, pi, n, H, L, M or T.
Further, on both sides of each magnetoelectric dipole unit 1, i.e., in the X-axis direction, decoupling ground posts 10 are symmetrically disposed, one on each side.
The second decoupling path 7 and the decoupling grounding post 10 can provide higher isolation, a coupling path is introduced in a high-frequency band to offset the inherent coupling of the antenna, the isolation of the phased array in the high-frequency band is improved, and meanwhile, the direction diagram in the high-frequency band is improved, so that the isolation of the high-frequency band can reach 20 dB.
The first decoupling path 3, the second decoupling path 7 and the decoupling ground pillar 10 may be used in a high isolation array antenna, including a microstrip patch antenna, a slot antenna, a super surface antenna, an electric dipole antenna, a magneto-electric dipole antenna, a monopole antenna, a planar aperture antenna or an on-chip antenna array.
Further, the metal floor 2 is provided with an H-shaped slit 12, the H-shaped slit 12 is provided at the center position of the shielding metal wall 15, and since the H-shaped slit 12 is linearly polarized excitation, the multi-frequency high-isolation millimeter wave phased array antenna based on multi-path cancellation is linearly polarized radiation. And metal grounding column walls 13 on two sides of the phased array are used for improving the scanning performance of the phased array.
Specifically, the metal grounding stud wall 13 is formed by arranging a plurality of fifth grounding studs 14 in a row.
Further, the feed layer 11 includes a strip line feed, a microstrip line feed, a substrate integrated waveguide feed network, or a coplanar waveguide feed.
The feed layer 11 is provided with a shielding metal wall 15, the shielding metal wall 15 comprises an isolation strip 16 and a plurality of fourth grounding columns 17, and the isolation strip 16 and the plurality of fourth grounding columns 17 are symmetrically arranged around the H-shaped gap to form a cavity for reducing the field diffusion of the H-shaped gap 12.
Further, the magnetoelectric dipole antenna unit 1 includes four rectangular metal patches 18 with cut corners and 12 third ground posts 19, the four rectangular metal patches 18 with cut corners are arranged in a 2 × 2 array, and each rectangular metal patch 18 is provided with three third ground posts 19.
In this embodiment, the multi-frequency high-isolation millimeter wave phased-array antenna based on multipath cancellation is processed by using a low-temperature co-fired ceramic process, and the dielectric substrate is Ferro A6 ME. The X-axis direction of the dielectric substrate is a vertical direction, the Y-axis direction is a horizontal direction, and the origin is a center point of the dielectric substrate, and the XY coordinate system mentioned in this embodiment is based on fig. 1.
In this example, the dielectric constant ε of the dielectric substraterIs [ 110.2 ]]All the thicknesses are [0.01 lambda, 0.3 lambda ]]The thickness of the metal floor is [0.005 lambda, 0.1 lambda ]]Where λ is the free space wavelength.
In this embodiment, the magnetoelectric dipole antenna unit 1 is composed of rectangular metal patches 18 with cut corners and 12 third grounding columns 19, and is excited by using an H-shaped slot 12. A multi-frequency high isolation millimeter wave phased array antenna based on multipath cancellation is arranged along an x-axis. The phase and amplitude of the introduced coupling offset path are adjusted by adjusting the size and the placement position of the first decoupling path 3, so that the offset with the original inherent coupling path is realized in a low frequency band, and the decoupling of the quaternary array is realized. The phase and amplitude of the introduced coupling offset path are adjusted by adjusting the size and the placing position of the second decoupling path 7 and the decoupling grounding pole 10, so that the offset with the original inherent coupling path is realized in a high-frequency band, and the decoupling of the quaternary array is realized. The number of the decoupling grounding posts 10 can be multiple by introducing the first decoupling path 3 and the second decoupling path 7, and the shapes of the first decoupling path 3 and the second decoupling path 7 can be different, so as to further adjust the amplitude and the phase of the coupling offset path branches, thereby achieving better decoupling effect.
In this embodiment, the feeding takes the form of a strip line.
As shown in fig. 2(a), 2(b) and 2(c), the dimensions of each part in the present invention are:
the patch height of the magnetoelectric dipole antenna unit 1 is 0.01 lambda and 0.3 lambda]Size w of rectangular metal patch 18 with cut corners1Is [0.01 lambda, 0.25 lambda ]]，w2Is [0.01 lambda, 0.25 lambda ]]，l1Is [0.01 lambda, 0.2 lambda ]]，l2Is [0.01 lambda, 0.1 lambda ]]Length s of the H-shaped gap 12 in the metal floor 21Is [0.01 lambda, 0.3 lambda ]]，s2Is [0.01 lambda, 0.2 lambda ]]Dimension of the first decoupling path 3, l3Is [0.01 lambda, 0.25 lambda ]]，l4Is [0.01 lambda, 0.1 lambda ]],w3Is [0.01 lambda, 0.1 lambda ]]，w4Is [0.01 lambda, 0.2 lambda ]]W5 is [0.01 λ, 0.2 λ],w6Is [0.01 lambda, 0.2 lambda ]]. The length l of the second decoupling path 75Is [0.01 lambda, 0.2 lambda ]]Width w7Is [0.01 lambda, 0.2 lambda ]]Inter-cell spacing d1Is [0.2 lambda, 0.6 lambda ]]Where λ is the free space wavelength.
The preferred dimensions of the parts in this example are as follows:
the height of the magnetic-electric dipole antenna unit 1 is 0.846mm, and the size w of the rectangular metal patch 18 with the corner cut1Is 1.4mm, w2Is 1mm, l11.05mm, l20.55mm, length s of the H-shaped gap 12 in the metal floor 21Is 1.15mm, s20.2mm, secondDimension of a decoupling path 3,/3Is 1.9mm, l4Is 0.3mm, w3Is 0.2mm, w4Is 0.6mm, w5Is 0.3mm, w6Is 0.6 mm. The length l of the second decoupling path 75Is 0.6mm, width w70.2mm, inter-cell spacing d1Is 4.5mm, where λ is the free space wavelength.
The decoupling process of the present invention is as follows:
the antenna units have inherent coupling, and decoupling is realized by introducing a first coupling cancellation path and a second coupling cancellation path and adjusting the amplitude and the phase of the coupling paths to enable the coupling paths to be in equal-amplitude reverse with the inherent coupling between the antenna units, so that the coupling paths and the inherent coupling are cancelled mutually. By introducing multiple decoupling paths, decoupling of multiple frequency bands can be achieved.
As shown in fig. 3(a) and 3(b), the operating frequency band of the multi-frequency high-isolation millimeter wave phased array antenna based on multipath cancellation is: 24.69-29.5GH (17.7%) and 37-42.29GHz (13.3%), an in-band reflection coefficient lower than-10 dB, and an in-band isolation greater than 20dB, as shown in FIG. 4(a) and FIG. 4(b), the port isolation before loading the decoupling path can improve the isolation of adjacent cells and improve radiation efficiency after loading the decoupling path.
As shown in fig. 5, 6, 7, 8, 9 and 10, the multi-frequency high-isolation millimeter wave phased array antenna based on multipath cancellation can achieve large angle scanning performance in a band. Specific properties are shown in table 1. The phased array can realize beam scanning of more than +/-54 degrees in a low-frequency band. Beam scanning from-64 ° to 63 ° can be achieved at 25GHz with gain fluctuations less than 2.4 dB. In the high frequency band, beam scanning from-39 ° to 41 ° can be achieved. A beam sweep of 59 deg. can be achieved at 37GHz with less than 3dB gain fluctuation.
TABLE 1
Frequency of Scanning angle Gain fluctuation (dB)
25GHz -64 ° to 63 ° 2.4
27GHz -61 ° to 61 ° 1.2
29GHz -54 ° to 54 ° 2.9
37GHz -59 ° to 59 ° 3
40GHz -48 ° to 48 ° 3.1
42GHz -39 ° to 41 ° 3.6
As shown in fig. 11(a) and 11(b), when the multi-frequency high-isolation millimeter wave phased array antenna based on multipath cancellation scans a frequency band (25GHz-29GHz) to a maximum scanning angle, the active S parameter is lower than-7 dB. The active S-parameter is substantially below-10 dB when the frequency band (37GHz-42GHz) is swept to the maximum sweep angle.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.

Claims (10)

1. A multi-frequency high-isolation millimeter wave phased-array antenna based on multipath cancellation is characterized by comprising a first dielectric substrate, a second dielectric substrate and a third dielectric substrate which are stacked, wherein magnetoelectric dipole antenna units and metal floors which are arranged in an array mode are arranged on the upper surface and the lower surface of the first dielectric substrate respectively, a feed layer is arranged on the second dielectric substrate, a GCPW (grounded phase conductor) switching layer is arranged on the third dielectric substrate, two metal grounding column walls are arranged on the edges of the two sides of the upper surface of the first dielectric substrate, and the magnetoelectric dipole antenna units are arranged between the two metal grounding column walls;
when two magnetoelectric dipole antenna units are arranged, a first decoupling path is arranged between the adjacent magnetoelectric dipole antenna units;
when the number of the magnetoelectric dipole antenna units is at least three, a first decoupling path is arranged between the adjacent magnetoelectric dipole antenna units, and second decoupling paths are arranged at two ends of other magnetoelectric dipole antenna units except two magnetoelectric dipole antenna units close to the metal grounding column wall.
2. The multi-frequency high-isolation millimeter wave phased array antenna of claim 1, wherein decoupling ground posts are provided on both sides of each magnetoelectric dipole antenna element.
3. The multi-frequency high-isolation millimeter-wave phased array antenna of claim 1, wherein two first decoupling paths are provided between adjacent magneto-electric dipole antenna elements, and are symmetrically disposed about a longitudinal axis of the first dielectric substrate.
4. The multi-frequency high-isolation millimeter wave phased array antenna according to any one of claims 1 to 3, wherein the first decoupling path comprises m first ground posts, n first metal strips, and o second metal strips;
when m is 3, n is 1, o is 1, two first grounding columns are arranged along the center of the first metal strip symmetrically, a third first grounding column is arranged at the center of the first metal strip, and the three first grounding columns are connected through the second metal strip;
when m is larger than 3, n is larger than or equal to 2, and o is larger than or equal to 2, the n first metal strips are arranged in parallel, each first metal strip is provided with two or three first grounding columns, when the first metal strips are provided with two first grounding columns, the two first grounding columns are symmetrically arranged along the center, and the second metal strip is used for connecting the two first grounding columns; when the first metal strip is provided with three first grounding poles, the first metal strip is arranged according to the condition that m is 3, and the second metal strip is used for connecting the three first grounding poles.
5. The multi-frequency, high isolation millimeter wave phased array antenna of claim 4, wherein the second decoupling path comprises at least two second ground posts and at least one third metal strip;
when the two second grounding posts and the third metal strip are included, the two second grounding posts are symmetrically arranged along the center of the third metal strip;
when the grounding structure comprises more than two second grounding posts and a plurality of third metal strips, the plurality of third metal strips are arranged in parallel, and every two second grounding posts are symmetrically arranged along the center point of the third metal strips.
6. The multi-frequency high isolation millimeter wave phased array antenna of claims 1 to 3, wherein the metal floor is provided with an H-shaped slot.
7. The multi-frequency high-isolation millimeter wave phased-array antenna of claim 6, wherein the feed layer is provided with a shielding metal wall, the shielding metal wall comprises an isolation strip and a plurality of fourth grounding pillars, and the isolation strip and the plurality of fourth grounding pillars are symmetrically arranged around the H-shaped slot to form a cavity.
8. The multi-frequency high-isolation millimeter wave phased array antenna of claim 6, wherein the magnetoelectric dipole antenna unit comprises four rectangular metal patches with cut angles and 12 third grounding columns, each rectangular metal patch is provided with three third grounding columns, and an H-shaped slot is adopted for excitation.
9. The multi-frequency high isolation millimeter wave phased array antenna of claim 1, wherein the feed layer comprises a stripline feed, a microstrip feed, a substrate integrated waveguide feed network, or a coplanar waveguide feed.
10. The multi-frequency high isolation millimeter wave phased array antenna of claim 4, wherein the first metal strip and the second metal strip are pi-shaped, n-shaped, H-shaped, L-shaped, M-shaped, double T-shaped, or triple T-shaped.
CN202210093358.8A 2022-01-26 2022-01-26 Multi-frequency high-isolation millimeter wave phased array antenna based on multi-path cancellation Pending CN114498030A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116247428A (en) * 2023-05-11 2023-06-09 微网优联科技(成都)有限公司 Millimeter wave array antenna
CN117060065A (en) * 2023-09-13 2023-11-14 南京林业大学 Millimeter wave super-surface antenna
CN117791121A (en) * 2024-02-27 2024-03-29 广东工业大学 Low-profile high-isolation duplex dual-polarized patch antenna
CN117060065B (en) * 2023-09-13 2024-05-17 南京林业大学 Millimeter wave super-surface antenna

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116247428A (en) * 2023-05-11 2023-06-09 微网优联科技(成都)有限公司 Millimeter wave array antenna
CN116247428B (en) * 2023-05-11 2023-08-08 微网优联科技(成都)有限公司 Millimeter wave array antenna
CN117060065A (en) * 2023-09-13 2023-11-14 南京林业大学 Millimeter wave super-surface antenna
CN117060065B (en) * 2023-09-13 2024-05-17 南京林业大学 Millimeter wave super-surface antenna
CN117791121A (en) * 2024-02-27 2024-03-29 广东工业大学 Low-profile high-isolation duplex dual-polarized patch antenna
CN117791121B (en) * 2024-02-27 2024-04-30 广东工业大学 Low-profile high-isolation duplex dual-polarized patch antenna

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