Miniaturized Broadband Dual-Polarized Magnetoelectric Dipole Millimeter-Wave End-Fire Antenna and Its Array

Abstract

The present invention discloses a miniaturized broadband dual-polarized magnetoelectric dipole millimeter-wave end-fire antenna and its array. The antenna includes a top metal layer (1), a first dielectric layer (2), a second metal layer (3), a second dielectric layer (4), a third dielectric layer (5), a third metal layer (6), a fourth dielectric layer (7), a fifth dielectric layer (8), and a bottom metal layer (9) arranged successively from top to bottom. The longitudinal bending structure is used to reduce the size of the transverse electric dipole and thus achieve miniaturization. At the same time, a dual-polarized antenna array composed of the antenna is also provided to achieve wide impedance bandwidths in two polarization directions, a low-complexity feeding structure, a low feeding profile, and a millimeter-wave antenna and array structure that is easy to directly integrate. The present invention can obtain a dual-polarized impedance bandwidth exceeding 50%, and the gain fluctuation within the band is also lower than 3 dB, with a stable radiation pattern.

Description

Technical Field

[0001] The present invention belongs to microwave and millimeter-wave communication, and particularly relates to a miniaturized broadband dual-polarized magnetoelectric dipole millimeter-wave end-fire antenna and its array. Background Art

[0002] With the rapid increase in the number of users of mobile terminals, the global mobile data traffic continues to grow at an unprecedented rate, and the current 4G mobile network capacity will be unsustainable in the long run. Compared with 4G systems, one of the main differences of 5G cellular systems is the shift to the millimeter-wave band, where it is easier to obtain a wider bandwidth at higher frequencies. Therefore, as a key device in millimeter-wave wireless systems, broadband millimeter-wave device antennas are urgently needed to be designed and developed. Among various millimeter-wave antennas, planar millimeter-wave array antennas are very promising because of their high gain and the advantage of being directly integrated with the radio frequency front-end. Moreover, in order to achieve better signal transmission and reception capabilities, millimeter-wave array antennas are required to have wide coverage and multi-polarization performance to facilitate the transmission and reception of signals from any direction. Therefore, millimeter-wave planar integrated array antennas capable of radiating dual-polarized waves have very good application prospects, especially miniaturized millimeter-wave dual-polarized planar integrated array antennas that are easy to directly integrate.

[0003] Magnetoelectric dipole antennas and arrays have received extensive attention due to their characteristics such as wide operating frequency bands, stable in-band gain flatness, stable unidirectional radiation patterns, and low cross-polarization. At present, experts, scholars, and engineering and technical personnel in related fields have carried out a series of studies on millimeter-wave substrate integrated magnetoelectric dipoles and obtained some corresponding technical achievements. However, in terms of the design of millimeter-wave substrate integrated magnetoelectric dipoles reported so far, there are the following aspects to be improved. First, when most millimeter-wave substrate integrated magnetoelectric dipoles are expanded into array antennas, their bandwidths often become significantly narrower. Second, most millimeter-wave substrate integrated magnetoelectric dipoles only achieve single-polarized or circularly polarized performance, and their ability to receive information from different directions is limited. Third, the feeding networks of most millimeter-wave substrate integrated magnetoelectric dipole antenna arrays mostly use slot coupling feeding, so it is difficult to directly integrate with millimeter-wave front-end circuit chips. In addition, the bandwidths of most millimeter-wave dual-polarized substrate integrated magnetoelectric dipole array antennas are lower than 40%, and there is still room for improvement. Summary of the Invention

[0004] Object of the Invention: The present invention aims to provide a miniaturized broadband dual-polarized magnetoelectric dipole millimeter-wave end-fire antenna, which uses a longitudinal bending structure to reduce the size of the transverse electric dipole and thus achieve miniaturization. At the same time, it also provides a dual-polarized antenna array composed of such antennas, realizing wide impedance bandwidths in two polarization directions, a low-complexity feeding structure, a low feeding profile, and a millimeter-wave antenna and array structure that is easy to directly integrate.

[0005] Technical solution: A miniaturized broadband dual-polarized magnetoelectric dipole millimeter-wave end-fire antenna of the present invention. The end-fire antenna includes a top metal layer, a first dielectric layer, a second metal layer, a second dielectric layer, a third dielectric layer, a third metal layer, a fourth dielectric layer, a fifth dielectric layer, and a bottom metal layer arranged in sequence from top to bottom;

[0006] At the center position of the top metal layer, there are four first square patches, second square patches, third square patches, and fourth square patches that are symmetric about the coordinate origin. Among them, the first square patch, the fourth square patch, and the second square patch, the third square patch form a pair of electric dipoles in the x direction. There is a first rectangular metal sheet similar to the shape of "I" in the middle of this pair of electric dipoles. This first rectangular metal sheet is the feeding sheet for the x-direction polarization, and forms an inverted "L" type feeding structure with the metallized vias that penetrate through the first dielectric layer, the second dielectric layer, the third dielectric layer, the fourth dielectric layer, and the fifth dielectric layer; In addition, another small square metal sheet is in the middle of the second square patch and the third square patch;

[0007] On the second metal layer, there is a second rectangular metal sheet similar to the shape of "I" that is perpendicular to the first rectangular metal sheet on the first metal layer; This second rectangular metal sheet is the feeding sheet for the y-direction polarization, and forms an inverted "L" type feeding structure with the metallized vias that penetrate through the first dielectric layer, the second dielectric layer, the third dielectric layer, the fourth dielectric layer, and the fifth dielectric layer. In addition, there are four small square patches at the four corners of this layer, which are connected to the electric dipoles of the top metal layer through the metallized blind vias that penetrate through the first dielectric layer;

[0008] The third metal layer is a grounding layer. Two circular slots are etched on the third metal layer. Four square patches that are symmetric about the coordinate origin are electrically connected to the third metal layer through a number of metallized semi-blind vias that penetrate through the first dielectric layer, the second dielectric layer, and the third dielectric layer. And the first group of metallized blind vias and the third group of metallized blind vias form a pair of magnetic dipoles in the x direction, and the second group of metallized blind vias and the fourth group of metallized blind vias form another pair of magnetic dipoles in the y direction;

[0009] The end-fire antenna also includes a low-profile microstrip feeding structure. The low-profile microstrip feeding structure includes the third metal layer, the fourth dielectric layer, the fifth dielectric layer, and the bottom metal layer. Among them, two mutually perpendicular 50-ohm microstrip lines are provided on the bottom metal layer, and are respectively connected to the two I-shaped first rectangular metal sheet and the second rectangular metal sheet located on the top metal layer and the second metal layer through the first metallized via and the second metallized via that penetrate through the first dielectric layer, the second dielectric layer, the third dielectric layer, the third metal layer, the fourth dielectric layer, and the fifth dielectric layer. The third metal layer serves as the common ground for the radiation unit and the microstrip feeding structure.

[0010] Among them,

[0011] On the top metal layer, there are also a first metallized blind via and a first small square patch, a second metallized blind via and a second small square patch, a third metallized blind via and a third small square patch, and a fourth metallized blind via and a fourth small square patch, which form a longitudinal bending structure. The four metallized blind vias are respectively located at the positions of the four corners of the first square patch, the second square patch, the third square patch, and the fourth square patch that are symmetric about the coordinate origin. The longitudinal bending structure is used to reduce the size of the transverse electric dipole and thus achieve miniaturization.

[0012] The sum of the thicknesses of the first dielectric layer, the second dielectric layer, and the third dielectric layer is one-quarter of the guided wavelength. The second dielectric layer and the fourth dielectric layer are semi-cured adhesive dielectric layers, and the first dielectric layer and the third dielectric layer are dielectric substrates.

[0013] The array antenna of the miniaturized broadband dual-polarized magnetoelectric dipole millimeter-wave end-fire antenna of the present invention is characterized in that the array antenna is composed of four dual-polarized magnetoelectric dipole units arranged in two rows and two columns to form a 2×2 array antenna. The four dual-polarized magnetoelectric dipole units are composed of a first dual-polarized magnetoelectric dipole unit, a second dual-polarized magnetoelectric dipole unit, a third dual-polarized magnetoelectric dipole unit, and a fourth dual-polarized magnetoelectric dipole unit. The excitation ports polarized in the x direction in two dual-polarized magnetoelectric dipole units in each row or each column are respectively connected to the output ports of a one-to-two microstrip power divider, that is, there is a first one-to-two microstrip power divider and a second one-to-two microstrip power divider in the bottom metal layer. The input ports of the two one-to-two microstrip power dividers are respectively connected to the output ports of a one-to-two third microstrip power divider; similarly, the excitation ports polarized in the y direction are respectively connected to the output ports of another one-to-two microstrip power divider, that is, there is another one-to-two fourth microstrip power divider and another one-to-two fifth microstrip power divider in the bottom metal layer. The input ports of the two one-to-two microstrip power dividers are respectively connected to the output ports of a one-to-two sixth microstrip power divider.

[0014] The structural scale of the array antenna can be expanded to 2 N ×2 N , N≥2.

[0015] The array antenna uses four 2 N-1 ×2 N-1 arrays arranged with two in each row and each column, and then uses a one-to-two microstrip power divider to connect the excitation ports polarized in the x direction of these four 2 N-1 ×2 N-1 arrays. Each 2 N-1 ×2N-1 The excitation ports of the array are respectively connected to the output ports of a total one-to-two power divider; similarly, another one-to-two microstrip power divider is used to connect the y-direction polarized excitation ports of these four 2 N-1 ×2 N-1 arrays, and each 2 N-1 ×2 N-1 The excitation ports of the array are respectively connected to the output ports of a total one-to-two power divider.

[0016] Advantageous effects: The present invention discloses a miniaturized broadband dual-polarized magnetoelectric dipole millimeter-wave end-fire antenna and its array. A single miniaturized broadband dual-polarized magnetoelectric dipole millimeter-wave end-fire antenna can obtain a dual-polarized impedance bandwidth of about 54% and a flat in-band gain. The antenna structure can be easily extended into an array, and the low-profile microstrip feeding structure used enables the antenna to be directly integrated with the millimeter-wave radio frequency front-end circuit. Description of the Drawings

[0017] Figure 1 It is a schematic diagram of the hierarchical structure of the antenna in the specific embodiment of the present invention;

[0018] Figure 2 It is a schematic diagram of the sectional structure of the antenna in the specific embodiment of the present invention;

[0019] Figure 3 It is a schematic diagram of the structure of the top metal layer of the 2×2 array antenna in the specific embodiment of the present invention;

[0020] Figure 4 It is a schematic diagram of the structure of the bottom metal layer (feeding network) of the 2×2 array antenna in the specific embodiment of the present invention;

[0021] Figure 5 It is a simulation result diagram of the S parameters of the antenna in the specific embodiment of the present invention;

[0022] Figure 6 It is a simulation result diagram of the gain curve of the antenna in the specific embodiment of the present invention;

[0023] Figure 7 It is a simulation result of the normalized radiation pattern of the x-direction polarization of the antenna in the specific embodiment of the present invention (33 GHz);

[0024] Figure 8 It is a simulation result of the normalized radiation pattern of the y-direction polarization of the antenna in the specific embodiment of the present invention (33 GHz);

[0025] Figure 9 It is a simulation result diagram of the S parameters of the 2×2 array antenna in the specific embodiment of the present invention;

[0026] Figure 10 This is the simulation result graph of the gain curve of the 2×2 array antenna in the specific embodiment of the present invention;

[0027] Figure 11 This is the simulation result of the normalized radiation pattern of the array antenna polarized in the x direction in the specific embodiment of the present invention (33 GHz);

[0028] Figure 12 This is the simulation result of the normalized radiation pattern of the array antenna polarized in the y direction in the specific embodiment of the present invention (33 GHz). Specific Embodiment

[0029] In order to further illustrate the technical solutions disclosed by the present invention, the technical solutions of the present invention will be further elaborated below in combination with specific embodiments and the accompanying drawings.

[0030] As Figure 1 and Figure 2 shown, this specific embodiment discloses a miniaturized broadband dual-polarized magnetoelectric dipole millimeter-wave end-fire antenna, which includes a top metal layer 1, a first dielectric layer 2, a second metal layer 3, a second dielectric layer 4, a third dielectric layer 5, a third metal layer 6, a fourth dielectric layer 7, a fifth dielectric layer 8, and a bottom metal layer 9 arranged in sequence from top to bottom; at the center position of the top metal layer 1, there are four first square patches 101, second square patches 102, third square patches 103, and fourth square patches 104 that are symmetric with respect to the coordinate origin. Among them, the first square patch 101, the fourth square patch 104, and the second square patch 102, the third square patch 103 form a pair of electric dipoles in the x direction. There is a first rectangular metal sheet 11 similar to the shape of "I" in the middle of this pair of electric dipoles. In addition, there is another small square metal sheet 12 between the second square patch 102 and the third square patch 103; on the second metal layer, there is printed a rectangular metal sheet 13 similar to the shape of "I" that is perpendicular to the rectangular metal sheet on the first metal layer; the third metal layer 6 is a ground layer, and two circular grooves 14 are etched on the third metal layer 6. The four square patches that are symmetric with respect to the coordinate origin are electrically connected to the third metal layer 6 through a plurality of metallized blind vias 15 that penetrate the first dielectric layer 2, the second dielectric layer 4, and the third dielectric layer 5.

[0031] Furthermore, the antenna of the present invention further includes a low-profile microstrip feeding structure, which includes a third metal layer 6, a fourth dielectric layer 7, a fifth dielectric layer 8, and a bottom metal layer 9. Among them, two mutually perpendicular 50-ohm microstrip lines 16 are provided on the bottom metal layer 9, and are respectively connected to two I-shaped rectangular patches 11 and 13 located on the top metal layer and the second metal layer through metallized vias 171 and 172 that penetrate the first dielectric layer 2, the second dielectric layer 4, the third dielectric layer 5, the third metal layer 6, the fourth dielectric layer 7, and the fifth dielectric layer 8. The third metal layer 6 serves as the common ground of the radiation unit and the microstrip feeding structure. The total thickness of the first dielectric layer 2, the second dielectric layer 4, and the third dielectric layer 5 is approximately one-quarter of the guided wavelength. The second dielectric layer 4 and the fourth dielectric layer 7 are semi-cured adhesive dielectric layers, and the first dielectric layer 2 and the third dielectric layer 5 are dielectric substrates.

[0032] As Figure 2 shown, a longitudinal bending structure can also be used to reduce the size of the transverse electric dipole and thus achieve miniaturization. The longitudinal bending structure consists of a first metallized blind via 181 and a first small square patch 191, a second metallized blind via 182 and a second small square patch 192, a third metallized blind via 183 and a third small square patch 193, and a fourth metallized blind via 184 and a fourth small square patch 194 as shown in Figure 3 shown. The four metallized blind vias are located at the four corners close to the four first square patches 101, second square patches 102, third square patches 103, and fourth square patches 104 that are symmetric about the coordinate origin and penetrate the first dielectric layer 2, and the four small square patches are printed on the second metal layer 3.

[0033] As Figure 3 shown, a 2×2 array antenna can be formed by arranging four magnetoelectric dipole units in two rows and two columns. The four magnetoelectric dipole units shown in the figure are the first magnetoelectric dipole unit 201, the second magnetoelectric dipole unit 202, the third magnetoelectric dipole unit 203, and the fourth magnetoelectric dipole unit 204. The excitation ports of the x-direction polarization of the two dual-polarized magnetoelectric dipole units in each row (or each column) are respectively connected to the output ports of a one-to-two microstrip power divider. Figure 4Specifically, they respectively correspond to the first microstrip power divider 21 and the second microstrip power divider 22. The input ports of the two one-to-two microstrip power dividers are respectively connected to the output ports of the one-to-two third microstrip power divider 23; similarly, the excitation ports polarized in the y direction are respectively connected to the output ports of another one-to-two microstrip power divider, that is, there are another one-to-two fourth microstrip power divider 24 and another one-to-two fifth microstrip power divider 25. The input ports of these two one-to-two microstrip power dividers are respectively connected to the output ports of the one-to-two sixth microstrip power divider 26.

[0034] In addition, based on the above 2×2 array, the scale of the array antenna can also be expanded to 2 N ×2 N (N≥2), and the expansion method is as follows:

[0035] Arrange four 2 N-1 ×2 N-1 (N≥2) arrays in two rows and two columns each, and then use a one-to-two microstrip power divider to connect the x-direction polarized excitation ports of these four 2 N-1 ×2 N-1 (N≥2) arrays. The excitation port of each 2 N-1 ×2 N-1 (N≥2) array is respectively connected to the output port of the total one-to-two power divider; similarly, use another one-to-two microstrip power divider to connect the y-direction polarized excitation ports of these four 2 N-1 ×2 N-1 (N≥2) arrays. The excitation port of each 2 N-1 ×2 N-1 (N≥2) array is respectively connected to the output port of the total one-to-two power divider.

[0036] In order to verify the feasibility of the miniaturized broadband dual-polarized array antenna and its array structure provided by the present invention, first, a commercial full-wave simulation software was used to simulate a disclosed miniaturized broadband dual-polarized magnetoelectric dipole millimeter-wave end-fire antenna structure model. Figures 5 - 9 The relevant simulation results are respectively given. The results show that the |S11|<-10dB bandwidth of this dual-polarized antenna is 54.5% (23.9 - 41.8 GHz), which is already greater than that of most dual-polarized millimeter-wave substrate integrated magnetoelectric dipole antennas; the isolation degrees |S12| and |S21|<-20dB, having good isolation; the peak gains of the two polarization directions are 7.85dBi and 7.68dBi respectively, and the in-band gain variation is within 3dB; it can be observed that at 33GHz, the xoz-plane and yoz-plane patterns of the two polarization directions are relatively stable and symmetric, and the cross polarization is relatively low.

[0037] Furthermore, an embodiment of a 2×2 array antenna was fabricated according to the solution and structure provided by the present invention for verification. The first dielectric layer 2 and the third dielectric layer 5 of the antenna can use dielectric substrates Taconic TLY-5 with thicknesses of 0.254 mm and 1 mm, respectively. The second dielectric layer 4 and the fourth dielectric layer 6 can use adhesive sheets Rogers4450F with a thickness of 0.1 mm, and the third dielectric layer 6 can use a dielectric substrate Taconic TLY-5 with a thickness of 0.127 mm. Figures 9 - 12 The relevant performance simulation results of the array antenna are given. From the simulation experimental results, it can be seen that the |S11|<-10 dB bandwidth of the array antenna is 51.1% (24.9 - 42.0 GHz), which is greater than that of most dual-polarized millimeter-wave substrate integrated magnetoelectric dipole array antennas; the isolation |S12| and |S21|<-18 dB; the peak gains of the two polarization directions are 12.68 dBi and 13.73 dBi, respectively, and the in-band gain variation is within 3 dB; it can be observed that the patterns in the xoz plane and yoz plane of the two polarization directions are relatively stable and symmetric at 33 GHz, and the cross polarization is low. This dual-polarized array antenna has characteristics such as a compact structure, a relatively wide impedance bandwidth, a high gain, and a low cross polarization. Moreover, the feeding network uses a dielectric substrate with a thickness of 0.227 mm (0.1 mm + 0.127 mm), which can achieve direct integration with the millimeter-wave radio frequency front-end chip.

Claims

1. A miniaturized broadband dual-polarized magnetoelectric dipole millimeter-wave end-fire antenna, characterized in that The edge - radiating antenna includes a top metal layer (1), a first dielectric layer (2), a second metal layer (3), a second dielectric layer (4), a third dielectric layer (5), a third metal layer (6), a fourth dielectric layer (7), a fifth dielectric layer (8), and a bottom metal layer (9) arranged successively from top to bottom; At the center position of the top metal layer (1), there are four first square patches (101), second square patches (102), third square patches (103), and fourth square patches (104) symmetric about the coordinate origin. Among them, the first square patch (101), the fourth square patch (104) and the second square patch (102), the third square patch (103) form a pair of electric dipoles in the x - direction. There is a first rectangular metal sheet (11) similar to the shape of "I" between this pair of electric dipoles. The first rectangular metal sheet (11) is a feeding sheet for x - direction polarization and forms an inverted "L" - shaped feeding structure with a metallized via hole (171) passing through the first dielectric layer, the second dielectric layer, the third dielectric layer, the fourth dielectric layer, and the fifth dielectric layer. In addition, another small square metal sheet (12) is between the second square patch (102) and the third square patch (103); On the second metal layer, there is a second rectangular metal sheet (13) similar to the shape of "I" printed perpendicular to the first rectangular metal sheet (11) on the first metal layer. The second rectangular metal sheet (13) is a feeding sheet for y - direction polarization and forms an inverted "L" - shaped feeding structure with a metallized via hole (172) passing through the first dielectric layer, the second dielectric layer, the third dielectric layer, the fourth dielectric layer, and the fifth dielectric layer. In addition, there are four small square patches at the four corners of this layer, which are connected to the electric dipoles of the top - layer metal layer through metallized blind holes passing through the first dielectric layer; The third metal layer (6) is a ground layer. Two circular grooves (14) are etched on the third metal layer (6). Four square patches (10) symmetric about the coordinate origin are electrically connected to the third metal layer (6) through a number of metallized semi - blind holes passing through the first dielectric layer (2), the second dielectric layer (4), and the third dielectric layer (5). And the first group of metallized blind holes (151) and the third group of metallized blind holes (153) form a pair of magnetic dipoles in the x - direction, and the second group of metallized blind holes (152) and the fourth group of metallized blind holes (154) form another pair of magnetic dipoles in the y - direction; The edge-emitting antenna further includes a low-profile microstrip feeding structure, which includes a third metal layer (6), a fourth dielectric layer (7), a fifth dielectric layer (8) and a bottom metal layer (9). Among them, two mutually perpendicular 50-ohm microstrip lines (16) are provided on the bottom metal layer (9), and are respectively connected to two I-shaped first rectangular metal sheets (11) and second rectangular metal sheets (13) located on the top metal layer and the second metal layer through first metallized vias (171) and second metallized vias (172) that penetrate the first dielectric layer (2), the second dielectric layer (4), the third dielectric layer (5), the third metal layer (6), the fourth dielectric layer (7) and the fifth dielectric layer (8). The third metal layer (6) serves as the common ground of the radiation unit and the microstrip feeding structure.

2. The miniaturized broadband dual-polarized magnetoelectric dipole millimeter-wave end-fire antenna according to claim 1, characterized in that: The top metal layer (1) is further provided with a first metallized blind hole (181) and a first small square patch (191), a second metallized blind hole (182) and a second small square patch (192), a third metallized blind hole (183) and a third small square patch (193), and a fourth metallized blind hole (184) and a fourth small square patch (194) form a longitudinal bending structure. The four metallized blind holes are respectively located at the four corners near the four first square patches (101), second square patches (102), third square patches (103) and fourth square patches (104) that are symmetric about the coordinate origin. The longitudinal bending structure is used to reduce the size of the transverse electric dipole and thus achieve miniaturization.

3. The miniaturized broadband dual-polarized magnetoelectric dipole millimeter-wave end-fire antenna according to claim 1, characterized in that: The sum of the thicknesses of the first dielectric layer (2), the second dielectric layer (4) and the third dielectric layer (5) is one-quarter of the guided wavelength. The second dielectric layer (4) and the fourth dielectric layer (7) are semi-cured adhesive dielectric layers, and the first dielectric layer (2) and the third dielectric layer (5) are dielectric substrates.

4. An array antenna of the miniaturized broadband dual-polarized magnetoelectric dipole millimeter-wave end-fire antenna according to claim 1, 2 or 3, characterized in that The array antenna is composed of four dual-polarized magnetoelectric dipole units arranged in two rows and two columns to form a 2×2 array antenna. The four dual-polarized magnetoelectric dipole units are composed of a first dual-polarized magnetoelectric dipole unit (201), a second dual-polarized magnetoelectric dipole unit (202), a third dual-polarized magnetoelectric dipole unit (203), and a fourth dual-polarized magnetoelectric dipole unit (204). The excitation ports polarized in the x direction in two dual-polarized magnetoelectric dipole units in each row or each column are respectively connected to the output ports of a one-to-two microstrip power divider. That is, a first one-to-two microstrip power divider (21) and a second one-to-two microstrip power divider (22) are provided in the bottom metal layer (9). The input ports of the two one-to-two microstrip power dividers are respectively connected to the output ports of a one-to-two third microstrip power divider (23); similarly, the excitation ports polarized in the y direction are respectively connected to the output ports of another one-to-two microstrip power divider. That is, another one-to-two fourth microstrip power divider (24) and another one-to-two fifth microstrip power divider (25) are provided in the bottom metal layer (9). The input ports of the two one-to-two microstrip power dividers are respectively connected to the output ports of a one-to-two sixth microstrip power divider (26).

5. The array antenna of the miniaturized broadband dual-polarized magnetoelectric dipole millimeter-wave end-fire antenna according to claim 4, characterized in that: The structural scale of the array antenna can be expanded to 2 N ×2 N , where N ≥ 2.

6. The array antenna of the miniaturized broadband dual-polarized magnetoelectric dipole millimeter-wave end-fire antenna according to claim 5, characterized in that: The array antenna uses four 2 N-1 ×2 N-1 arrays arranged with two in each row and each column, and then a one-to-two microstrip power divider is used to connect the excitation ports of the four 2 N-1 ×2 N-1 arrays in the x-direction polarization. The excitation port of each 2 N-1 ×2 N-1 array is respectively connected to the output port of the total one-to-two power divider; similarly, another one-to-two microstrip power divider is used to connect the excitation ports of the four 2 N-1 ×2 N-1 arrays in the y-direction polarization. The excitation port of each 2 N-1 ×2 N-1 array is respectively connected to the output port of the total one-to-two power divider.

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