A Dual-Band and Dual-Polarized Magnetoelectric Dipole Antenna Array for Millimeter-Wave Mobile Terminals

Abstract

A dual - band and dual - polarization magnetoelectric dipole antenna array for millimeter - wave mobile terminals, belonging to the field of 5G millimeter - wave wireless communication and antenna technology. It is composed of antenna units arranged and combined. Each antenna unit includes a horizontal square metal patch, a butterfly - shaped metal patch layer, a metal floor, a metallized blind via, a feeding structure and the dielectric filled in the above structures. Among them, the feeding structure includes a + 45° feeding unit and a - 45° feeding unit. The antenna array is composed of four antenna units with the same structure arranged at equal intervals and two pseudo - magnetic - current structures located on both sides. The four ports of the first and second antenna units and the four ports of the third and fourth antenna units are mirror - symmetric about the array center. The present invention utilizes the metallized blind vias of the metal floor and the structure of the butterfly - shaped metal patch layer to realize a compact antenna unit design, which is applicable to millimeter - wave mobile antenna arrays taking the Qualcomm millimeter - wave module as an example; utilizes the pseudo - magnetic - current structure to achieve a wide scanning angle; and can achieve the co - existence of small size, dual - band, dual - polarization and wide scanning angle.

Description

Technical Field

[0001] The present invention belongs to the technical field of 5G millimeter-wave wireless communication and antennas, and relates to a dual-band and dual-polarized magnetoelectric dipole antenna array for millimeter-wave mobile terminals. Background Art

[0002] With the rapid growth of user demands in the field of mobile communication, a wider bandwidth in the millimeter-wave band is required to meet user needs. Currently, the commercial frequency bands for millimeter-wave communication on mobile phones are mainly n257 (26.5 - 29.5 GHz), n258 (24.25 - 27.5 GHz), n260 (37.0 - 40.0 GHz), and n261 (27.5 - 28.35 GHz). The coverage of dual polarization and multi-bands has always been the key to the design of millimeter-wave chip antennas.

[0003] Due to the large propagation attenuation of electromagnetic waves in the millimeter-wave band, its main transmission mode is line-of-sight propagation, which is prone to polarization mismatch and link loss. Therefore, it is necessary to design a dual-polarized directional antenna and form an antenna array to increase the gain. To achieve multi-angle coverage of communication, the array antenna needs to have a wide beam scanning angle. And due to the upgrade of other hardware in the mobile phone system, the space for the antenna in the mobile phone is gradually reduced, and the design of small-sized antennas has gradually become a research focus.

[0004] The present invention places two pairs of magnetoelectric dipole antennas at ±45°, and uses orthogonal L-shaped feeders for coupled feeding. By adding metallized blind holes at the four corners of the antenna floor and bending the vertical magnetic dipole structure, a small-sized antenna unit with dual-band ±45° dual polarization is realized. Finally, the antenna unit is formed into a 1×4 array, and a magnetic current-like structure is added on both sides of the array, realizing a beam scanning of at least ±47° in the entire frequency band for the array. Summary of the Invention

[0005] In order to solve the problem that it is difficult for millimeter-wave terminal antennas to balance miniaturization, dual polarization, broadband, and wide scanning angle, the present invention proposes a dual-band and dual-polarized magnetoelectric dipole millimeter-wave antenna array. By placing metallized blind holes at the four corners of the floor and bending the vertical magnetic dipole, the miniaturization of the antenna is realized. By adding a magnetic current-like structure on both sides of the 1×4 array, a wide scanning angle for the array is realized.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0007] A dual-band and dual-polarized magnetoelectric dipole antenna array for millimeter-wave mobile terminals is composed of a plurality of dual-band and dual-polarized magnetoelectric dipole antenna units with the same structure arranged and combined. Each of the dual-band and dual-polarized magnetoelectric dipole antenna units is as Figure 1As shown in the figure, it mainly includes a horizontal square metal patch 1, four identical butterfly-shaped metal patch layers 2, a metal floor 3, metallized blind vias 4, a feeding structure 5, and a dielectric 6 filled in the above structures. Among them, the feeding structure 5 includes a +45° feeding unit 5-1 and a -45° feeding unit 5-2.

[0008] The described horizontal square metal patch 1 is composed of four identical square metal small patches, located at the top layer of the antenna unit, with a gap left between adjacent small patches (the gap size between adjacent small patches is 0.35 - 0.55 mm), forming an electric dipole; the four patches are sequentially numbered as patch 1, patch 2, patch 3, and patch 4 in a clockwise direction. To avoid contact with the feeding structure 5, a slit is etched inward at the top corner of the four small patches near the center of the horizontal square metal patch 1 (i.e., at the feeding position) (the size of the slit is: the length is 0.58 - 0.68 mm, and the width is 0.15 - 0.25 mm, where the length is along the diagonal direction of the patch); the horizontal part of the feeding structure 5 arranged in a cross pattern is placed between the two diagonal slits, the intersection of the +45° feeding unit 5-1 and the -45° feeding unit 5-2 does not touch, and the ends of the two feeding units are placed inside the corresponding small patch slits and do not touch the slit edges.

[0009] The described butterfly-shaped metal patch layer 2 is located between the horizontal square metal patch 1 and the bottom metal floor 3, and the four butterfly-shaped metal patch layers 2 are arranged below the four metal small patches of the horizontal square metal patch 1. Each butterfly-shaped metal patch layer 2 includes an upper patch 2-1, a middle square patch 2-2, and a lower patch 2-3, forming a magnetic dipole, which is an integrated structure, specifically as follows:

[0010] The upper patch 2-1 is formed by bending a vertically arranged metal patch 90° horizontally in the middle, with the corner direction outward; to avoid contact with the feeding structure 5, there is a notch at the upper corner. The upper patch 2-1 is vertically arranged below two sides of a metal small patch in the horizontal square metal patch 1, and they are in contact, where the two sides of the metal small patch are adjacent to the etched slit.

[0011] The middle square patch 2-2 is fitted and installed below the upper patch 2-1, and one top corner of the middle square patch 2-2 coincides with the top corner of the upper patch 2-1 at the corner.

[0012] The lower patch 2-3 is formed by bending a vertically arranged metal patch 90° horizontally in the middle, with the corner direction inward, and the corner coincides with the other top corner of the middle square patch 2-2. That is, the two corners of the upper patch 2-1 and the lower patch 2-3 are located on the same diagonal of the middle square patch 2-2.

[0013] The horizontal square metal patch 1 and four identical butterfly metal patch layers 2 form a complementary source. The horizontal square metal patch 1 dominates radiation at low frequencies, and the butterfly metal patch layer 2 dominates radiation at high frequencies. The operating frequencies of the low and high frequencies can be adjusted by changing the sizes of the horizontal metal patch 1 and each part of the vertical butterfly metal patch 2.

[0014] The metal floor 3 is located at the bottom layer. The lower patch 2-3 of the butterfly metal patch layer 2 is arranged in contact with the metal floor 3. After the four butterfly metal patch layers 2 are arranged, the corners of the four upper patches 2-1 are close to the position of the antenna central axis, and the corners of the four lower patches 2-3 are far from the position of the antenna central axis. Two round holes are etched on the metal floor 3 to ensure that the horizontal section B of the vertical part 5-1-1 does not contact the ground. The round holes are located at the positions near the corners of the lower patches 2-3 of any two adjacent butterfly metal patch layers 2, and the centers of the two round holes coincide with the centers of the horizontal section B of the vertical part 5-1-1 and the horizontal section B of the vertical part 5-2-1 respectively. An external feeding structure 8 is arranged below the round holes, and the external feeding structure 8 is connected to the horizontal section B for radio frequency signal input. Three metallized blind holes 4 are provided at each of the four top corners of the metal floor 3, and there is a gap (the gap range is 0.2 - 0.6 mm) between the top surface of the metallized blind hole 4 and the horizontal square metal patch 1. The metallized blind hole 4 can extend the current of the metal floor 3, increase the equivalent ground size. The capacitive effect between the metallized blind hole 4 and the horizontal metal patch 1 can improve the impedance matching of the antenna element and shift the resonance point of the antenna element to the left, reducing the electrical size of the antenna.

[0015] The feeding unit 5 is an L-shaped feeder structure, including a +45° feeding unit 5-1 and a -45° feeding unit 5-2, specifically as follows:

[0016] The +45° feeding unit 5-1 includes a vertical part 5-1-1 and a horizontal part 5-1-2, in a similar L-shaped structure. The horizontal part 5-1-2 is a horizontally arranged long strip structure. The vertical part 5-1-1 is provided with three bending structures downward along one end of the horizontal part 5-1-2, that is, the vertical part 5-1-1 is, from top to bottom, a vertical section A, a horizontal section A, a vertical section B, and a horizontal section B. The height of the vertical section A is less than the height of the upper patch 2-1. The horizontal section A is located above the middle square patch 2-2 and does not contact it. The gap range between the horizontal section A and the middle square patch 2-2 is 0.03 - 0.1 mm. The height of the vertical section B is greater than the height of the lower patch 2-3. The gap range between the vertical section B and the lower patch 2-3 is 0.03 - 0.1 mm. The center of the horizontal section B coincides with the center of the round hole etched on the metal floor 3, and the horizontal section B is connected to the external feeding structure 8.

[0017] The -45° feeding unit 5-2 includes a vertical portion 5-2-1 and a horizontal portion 5-2-2. The horizontal portion 5-2-2 is a long strip structure arranged horizontally, and its middle part is bent downward so as not to contact the horizontal portion 5-1-2. The vertical portion 5-2-1 has the same structure as the vertical portion 5-1-1 and is arranged at the position of another butterfly-shaped metal patch layer 2.

[0018] After arrangement, the two butterfly-shaped metal patch layers 2 where the two feeding units are located are adjacent; the vertical segment A of the vertical portion 5-1-1 of the +45° feeding unit 5-1 and the vertical segment A of the vertical portion 5-2-1 of the -45° feeding unit 5-2 are both parallel to the upper patch 2-1 of the butterfly-shaped metal patch layer 2, the vertical segment B of the vertical portion 5-1-1 of the +45° feeding unit 5-1 and the vertical segment B of the vertical portion 5-2-1 of the -45° feeding unit 5-2 are both parallel to the lower patch 2-3 of the butterfly-shaped metal patch 2-1, and the horizontal segment A of the vertical portion 5-1-1 of the +45° feeding unit 5-1 and the horizontal segment A of the vertical portion 5-2-1 of the -45° feeding unit 5-2 are both parallel to the horizontal square metal patch 1. The vertical portions 5-1-1 of the +45° feeding unit 5-1 and 5-2-1 of the -45° feeding unit 5-2 respectively form two 50-ohm air microstrip lines with the butterfly-shaped metal patch layer 2. The horizontal portion 5-1-2 of the +45° feeding unit 5-1 and the horizontal portion 5-2-2 of the -45° feeding unit 5-2 are both parallel to the horizontal square metal patch 1, and the horizontal portion 5-1-2 and the horizontal portion 5-2-2 are inserted into the gap of the horizontal square metal patch 1 to achieve capacitive coupling feeding, and the inserted length can adjust the impedance matching of the antenna unit. The dielectric 6 is filled in the structural space composed of the horizontal square metal patch 1, four butterfly-shaped metal patch layers 2 with the same structure, the metal floor 3, the metallized blind holes 4, and the feeding structure 5 to increase the electrical length of the antenna. The relative dielectric constant of the dielectric 6 filled in the array affects the operating frequency of the antenna and can be adjusted according to the requirements of the operating frequency band.

[0019] Furthermore, the millimeter-wave dual-band dual-polarized magnetoelectric dipole antenna array is as Figure 6 shown. The antenna array consists of four dual-band dual-polarized magnetoelectric dipole antenna units with the same structure and two quasi-magnetic current structures 7. The four antenna units are arranged side by side at equal intervals, and the two quasi-magnetic current structures 7 are located on the left and right sides of the antenna unit assembly. The positions of the +45° feeding units 5-1 and -45° feeding units 5-2 placed on each antenna unit are ports 1, 3, 5, 7 and ports 2, 4, 6, 8 respectively, with a total of 8 ports. The four ports on the first and second antenna units and the four ports on the third and fourth antenna units are mirror-symmetric about the center of the array (as Figure 6As shown, ports 1, 2, 3, 4 and ports 5, 6, 7, 8 are mirror-symmetrically distributed about the center of the array. The distance between the centers of adjacent millimeter-wave dual-frequency dual-polarized magnetoelectric dipole antenna elements is L 7 , L 7 ranges from 0.4 to 0.5 mm; the distance between the magnetic current-like structure 7 and its adjacent antenna element is L 8 , L 8 ranges from 0.1 to 0.4 mm.

[0020] Furthermore, the magnetic current-like structure 7 is composed of a rectangular metal patch 7-1, a metallized via 7-2 and a metal floor 3. Among them, the rectangular metal patch 7-1 is parallel to the horizontal square metal patch 1, and the metallized via 7-2 is parallel to the metallized blind via 4. The magnetic current-like structure 7 can form slots in the xoy direction with the adjacent horizontal square metal patch 1 and metallized blind via 4, radiating the array energy in the non-end-fire direction, increasing the beam width of the antenna element and the scanning angle of the array. By adjusting the distance L between the magnetic current-like structure 7 and the adjacent antenna element 8 the beam widths of the two side antenna elements can be adjusted, but if the magnetic current-like structure 7 is too close to the adjacent antenna element, the impedance matching of the antenna element will be changed.

[0021] The working process of the present invention is as follows:

[0022] The radio frequency signal is input through the external feeding structure 8. The external feeding structure 8 is connected to the horizontal section B of the vertical part 5-1-1 of the +45° feeding unit 5-1 and the horizontal section B of the vertical part 5-2-1 of the -45° feeding unit 5-2. The signal is fed into from the horizontal section B and forms two 50-ohm air microstrip lines with the vertical parts 5-1-1 and 5-2-1 respectively along the butterfly-shaped metal patch layer 2 to input the signal into the horizontal parts 5-2-1 and 5-2-2 of the feeding unit respectively. The horizontal parts 5-2-1 and 5-2-2 of the feeding unit are inserted into the horizontal square metal patch 1 for capacitive coupling feeding. The radio frequency signal enters the antenna element through capacitive coupling feeding. The metallized blind via 4 extends the current of the metal ground 3 and forms a capacitive effect with the horizontal square metal patch 1. The dielectric 6 in the antenna adjusts the electrical length of the antenna.

[0023] The radiation of the horizontal square metal patch 1 as an electric dipole dominates at low frequencies, and the surface current is distributed at the edges of the patch, as shown in FIGS. 10(a) and 10(b). Through the +45° feeding unit 5-1 and the -45° feeding unit 5-2, currents in the +45° direction and the -45° direction are respectively formed;

[0024] The radiation of the butterfly-shaped metal patch layer 2 as a magnetic dipole dominates at high frequencies. Through the +45° feeding unit 5-1 and the -45° feeding unit 5-2, magnetic currents in the -45° direction and the +45° direction are respectively formed at the gaps between the horizontal square metal patches 1, as shown in FIGS. 10(c) and 10(d). The current and the magnetic current are orthogonal and have the same phase center. The electric dipole and the magnetic dipole work as complementary sources.

[0025] Four antenna units are arranged side by side at equal intervals. Two quasi-magnetic current structures 7 are located on the left and right sides of the antenna unit assembly. The +45° feeding units 5-1 and the -45° feeding units 5-2 placed on each antenna unit are respectively ports 1, 3, 5, 7 and ports 2, 4, 6, 8. The four ports on the first and second antenna units and the four ports on the third and fourth antenna units are mirror-symmetric about the array center. The quasi-magnetic current structure 7 can form slots in the xoy direction with the adjacent horizontal square metal patch 1 and the metallized blind hole 4. The RF signal is fed into the antenna array by the external feeding structure 8, and the beam scanning of the array is controlled by changing the excitation phase of the fed RF signal.

[0026] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0027] (1) The magnetoelectric dipole antenna unit of the present invention utilizes the metallized blind holes 4 at the four top corners of the metal floor 3 and the structure of the butterfly-shaped metal patch layer 2 to achieve a compact antenna unit design, which is applicable to millimeter-wave mobile phone antenna arrays taking high-pass millimeter-wave modules as an example.

[0028] (2) The magnetoelectric dipole antenna array of the present invention utilizes the quasi-magnetic current structure 7 to achieve a wide scanning angle.

[0029] (3) The magnetoelectric dipole antenna array of the present invention can achieve the coexistence of small size, dual frequency, dual polarization and wide scanning angle. Description of the Drawings

[0030] Figure 1 is a schematic structural diagram of a dual-frequency and dual-polarization magnetoelectric dipole antenna unit proposed by the present invention;

[0031] Figure 2 is a schematic structural diagram of the electric dipole in the dual-frequency and dual-polarization magnetoelectric dipole antenna unit proposed by the present invention;

[0032] Figure 3 is a schematic structural diagram of the magnetic dipole in the dual-frequency and dual-polarization magnetoelectric dipole antenna unit proposed by the present invention;

[0033] Figure 4 is a schematic structural diagram of the feeding unit in the dual-frequency and dual-polarization magnetoelectric dipole antenna unit proposed by the present invention;

[0034] Figure 5 It is a schematic diagram of the structure of the metal ground layer in the dual-band and dual-polarized magnetoelectric dipole antenna element proposed by the present invention;

[0035] Figure 6 It is a schematic diagram of the structure of the dual-band and dual-polarized magnetoelectric dipole 1×4 antenna array proposed by the present invention;

[0036] Figure 7 It is a schematic diagram of the structure of the magnetic current-like structure 14 in the dual-band and dual-polarized magnetoelectric dipole 1×4 antenna array proposed by the present invention;

[0037] Figure 8 They are the S parameters of the dual-band and dual-polarized magnetoelectric dipole antenna element proposed by the present invention;

[0038] Figure 9 is the two-dimensional radiation pattern of the dual-band and dual-polarized magnetoelectric dipole antenna element proposed by the present invention; Figure 9(a) is the radiation pattern of the dual-band and dual-polarized magnetoelectric dipole antenna element proposed by the present invention in the E-plane and H-plane at 26.5 GHz; Figure 9(b) is the radiation pattern of the dual-band and dual-polarized magnetoelectric dipole antenna element proposed by the present invention in the E-plane and H-plane at 41 GHz;

[0039] Figure 10(a) is the current distribution of the dual-band and dual-polarized magnetoelectric dipole antenna element fed by the +45° feeding unit 5-1 proposed by the present invention at 26.5 GHz;

[0040] Figure 10(b) is the current distribution of the dual-band and dual-polarized magnetoelectric dipole antenna element fed by the -45° feeding unit 5-2 proposed by the present invention at 26.5 GHz;

[0041] Figure 10(c) is the magnetic current distribution of the dual-band and dual-polarized magnetoelectric dipole antenna element fed by the +45° feeding unit 5-1 proposed by the present invention at 41 GHz;

[0042] Figure 10(d) is the magnetic current distribution of the dual-band and dual-polarized magnetoelectric dipole antenna element fed by the -45° feeding unit 5-2 proposed by the present invention at 41 GHz;

[0043] Figure 11 They are the S parameters applied to the dual-band and dual-polarized magnetoelectric dipole 1×4 antenna array in the present invention;

[0044] Figures 12(a) to (d) are the beam scanning angles of the dual-band and dual-polarized magnetoelectric dipole 1×4 antenna array applied in the present invention at 26.5 GHz, 37 GHz, 41 GHz, and 43 GHz;

[0045] In the figure: 1 horizontal square metal patch; 2 butterfly-shaped metal patch layer; 3 metal floor; 4 metallized blind hole; 5 feeding structure; 6 dielectric; 7 magnetic current-like structure; 8 external feeding structure;

[0046] 2-1 upper patch, 2-2 middle square patch, 2-3 lower patch;

[0047] 5-1 +45° feeding unit; 5-1-1 vertical part; 5-1-2 horizontal part;

[0048] 5-2 -45° feeding unit; 5-2-1 vertical part; 5-2-2 horizontal part;

[0049] 7-1 rectangular metal patch, 7-2 metallized via hole. Detailed implementation manners

[0050] The following combines the specification drawings and technical solutions to make a detailed description of the specific implementation manners of the present invention.

[0051] A millimeter-wave dual-band and dual-polarized magnetoelectric dipole antenna array for a mobile terminal is composed of a plurality of dual-band and dual-polarized magnetoelectric dipole antenna units with the same structure arranged and combined. Each of the dual-band and dual-polarized magnetoelectric dipole antenna units is as Figure 1 shown, and mainly includes a horizontal square metal patch 1, four butterfly metal patch layers 2 with the same structure, a metal floor 3, metallized blind holes 4, a feeding structure 5, and a dielectric 6 filled in the above structures. Among them, the feeding structure 5 includes a +45° feeding unit 5-1 and a -45° feeding unit 5-2.

[0052] The horizontal square metal patch 1 is composed of four square metal small patches with the same structure, located at the top layer of the antenna unit. There are gaps between adjacent small patches to form an electric dipole; the four patches are numbered as patch No. 1, patch No. 2, patch No. 3, and patch No. 4 in clockwise order. In order to avoid contact with the feeding structure 5, a slit is etched inward at the top corners of the four small patches near the center of the horizontal square metal patch 1 (i.e., the feeding position); the horizontal parts of the feeding structure 5 arranged in a cross shape are placed between the two diagonal slits. The intersection of the +45° feeding unit 5-1 and the -45° feeding unit 5-2 does not contact, and the ends of the two feeding units are placed in the corresponding small patch slits and do not contact the slit edges.

[0053] The described butterfly-shaped metal patch layer 2 is located between the horizontal square metal patch 1 and the bottom metal floor 3. Four butterfly-shaped metal patch layers 2 are arranged below the four metal patches of the horizontal square metal patch 1. Each butterfly-shaped metal patch layer 2 includes an upper patch 2-1, a middle square patch 2-2, and a lower patch 2-3, forming a magnetic dipole, which is an integrated structure. Specifically: The upper patch 2-1 is formed by bending a metal patch arranged vertically by 90° horizontally in the middle, with the corner direction outward; in order to avoid contact with the feeding structure 5, there is a notch on the upper layer at the corner. The upper patch 2-1 is vertically arranged below two sides of one metal patch in the horizontal square metal patch 1, and they are in contact, where the two sides of the metal patch are adjacent to the etched slot. The middle square patch 2-2 is fitted and installed below the upper patch 2-1, and one vertex angle of the middle square patch 2-2 coincides with the vertex angle at the corner of the upper patch 2-1. The lower patch 2-3 is formed by bending a metal patch arranged vertically by 90° horizontally in the middle, with the corner direction inward, and the corner coincides with the other vertex angle of the middle square patch 2-2. That is, the two corners of the upper patch 2-1 and the lower patch 2-3 are located on the same diagonal line of the middle square patch 2-2.

[0054] The described horizontal square metal patch 1 and four identical butterfly-shaped metal patch layers 2 form a complementary source. The horizontal square metal patch 1 dominates the radiation at low frequencies, and the butterfly-shaped metal patch layer 2 dominates the radiation at high frequencies. The operating frequencies of low frequencies and high frequencies can be adjusted by adjusting the sizes of the horizontal metal patch 1 and each part of the vertical butterfly-shaped metal patch 2.

[0055] The metal floor 3 is located at the bottom layer. The lower patch 2-3 of the butterfly-shaped metal patch layer 2 is fitted and arranged on the metal floor 3. After the four butterfly-shaped metal patch layers 2 are arranged, the corners of their four upper patches 2-1 are close to the position of the antenna central axis, and the corners of the four lower patches 2-3 are far from the position of the antenna central axis. Two round holes are etched on the metal floor 3 to ensure that the horizontal section B of the vertical part 5-1-1 does not contact the ground. The round holes are located at the positions near the corners of the lower patches 2-3 of any two adjacent butterfly-shaped metal patch layers 2, and the centers of the two round holes coincide with the centers of the horizontal section B of the vertical part 5-1-1 and the horizontal section B of the vertical part 5-2-1 respectively. An external feeding structure 8 is arranged below the round holes. The external feeding structure 8 is connected to the horizontal section B and is used for radio frequency signal input. Three metallized blind holes 4 are provided at each of the four vertex angles of the metal floor 3, and there is a gap between the top surface of the metallized blind hole 4 and the horizontal square metal patch 1. The metallized blind holes 4 can play a role in extending the current of the metal floor 3, increasing the equivalent ground size. The capacitance effect between the metallized blind holes 4 and the horizontal metal patch 1 can improve the impedance matching of the antenna unit and shift the resonance point of the antenna unit to the left, reducing the electrical size of the antenna.

[0056] The described feeding unit 5 has an L-shaped feeder structure, including a +45° feeding unit 5-1 and a -45° feeding unit 5-2, specifically as follows: The +45° feeding unit 5-1 includes a vertical portion 5-1-1 and a horizontal portion 5-1-2, in a similar L-shaped structure. The horizontal portion 5-1-2 is a long strip structure arranged horizontally. The vertical portion 5-1-1 is provided with three bending structures downward along one end of the horizontal portion 5-1-2, that is, the vertical portion 5-1-1 is successively a vertical section A, a horizontal section A, a vertical section B, and a horizontal section B from top to bottom. Among them, the height of the vertical section A is less than the height of the upper patch 2-1, the horizontal section A is located above the middle square patch 2-2 and does not contact it, the gap range between the horizontal section A and the middle square patch 2-2 is 0.03 - 0.1 mm, the height of the vertical section B is greater than the height of the lower patch 2-3, the gap range between the vertical section B and the lower patch 2-3 is 0.03 - 0.1 mm, the center of the horizontal section B coincides with the center of the etched round hole of the metal floor 3, and the horizontal section B is connected to the external feeding structure 8. The -45° feeding unit 5-2 includes a vertical portion 5-2-1 and a horizontal portion 5-2-2. The horizontal portion 5-2-2 is a long strip structure arranged horizontally, and its middle part is bent downward so as not to contact the horizontal portion 5-1-2. The vertical portion 5-2-1 has the same structure as the vertical portion 5-1-1 and is arranged at the position of another butterfly-shaped metal patch layer 2.

[0057] After arrangement, the two butterfly-shaped metal patch layers 2 where the two feeding units are located are adjacent; the vertical section A of the vertical part 5-1-1 of the +45° feeding unit 5-1 and the vertical section A of the vertical part 5-2-1 of the -45° feeding unit 5-2 are both parallel to the upper patch 2-1 of the butterfly-shaped metal patch layer 2, the vertical section B of the vertical part 5-1-1 of the +45° feeding unit 5-1 and the vertical section B of the vertical part 5-2-1 of the -45° feeding unit 5-2 are both parallel to the lower patch 2-3 of the butterfly-shaped metal patch 2-1, and the horizontal section A of the vertical part 5-1-1 of the +45° feeding unit 5-1 and the horizontal section A of the vertical part 5-2-1 of the -45° feeding unit 5-2 are both parallel to the horizontal square metal patch 1. The vertical part 5-1-1 of the +45° feeding unit 5-1 and the vertical part 5-2-1 of the -45° feeding unit 5-2 respectively form two 50-ohm air microstrip lines with the butterfly-shaped metal patch layer 2. The horizontal part 5-1-2 of the +45° feeding unit 5-1 and the horizontal part 5-2-2 of the -45° feeding unit 5-2 are both parallel to the horizontal square metal patch 1, and the horizontal part 5-1-2 and the horizontal part 5-2-2 are inserted into the gap of the horizontal square metal patch 1 to achieve capacitive coupling feeding, and the inserted length can adjust the impedance matching of the antenna unit. The dielectric 6 is filled in the structural space composed of the horizontal square metal patch 1, four identical butterfly-shaped metal patch layers 2, the metal floor 3, the metallized blind holes 4, and the feeding structure 5 to increase the electrical length of the antenna. The relative dielectric constant of the dielectric 6 filled in the array affects the operating frequency of the antenna and can be adjusted according to the requirements of the operating frequency band.

[0058] The specific dimensions and structure are as follows (except Figure 1 for which, the dielectric 6 is hidden):

[0059] See Figure 1 As shown, each dual-band dual-polarized magnetoelectric dipole antenna unit includes a horizontal square metal patch 1, four identical butterfly-shaped metal patch layers 2, a metal floor 3, metallized blind holes 4, a feeding structure 5, and a dielectric 6 filled in the above structure. Among them, the feeding structure 5 includes a +45° feeding unit 5-1 and a -45° feeding unit 5-2. The overall size of the dual-band dual-polarized magnetoelectric dipole antenna unit is 4 mm × 4 mm × 1 mm.

[0060] See Figure 2 As shown, the horizontal square metal patch 1 is composed of four identical square metal small patches, located at the top layer of the antenna unit, with a 0.45-mm gap left between adjacent small patches to form an electric dipole; the four patches are sequentially numbered as patch No. 1, patch No. 2, patch No. 3, and patch No. 4 in a clockwise direction, and the side length L of the small patch 1It is 1.63 mm. To avoid contact with the feeding structure 5, a slit is etched inward at the top corners near the center of the four small patches (i.e., at the feeding position). The length of the slit is 0.58 mm and the width is 0.15 mm. Among them, the length is along the diagonal direction of the patch. The horizontal part of the cross-shaped feeding structure 5 is placed between the slits at two opposite corners. The intersection of the +45° feeding unit 5-1 and the -45° feeding unit 5-2 does not make contact, and the ends of the two feeding units are placed inside the corresponding small patch slits and do not contact the slit edges.

[0061] See Figure 3 , the butterfly-shaped metal patch layer 2 is located between the horizontal square metal patch 1 and the bottom metal floor 3. Four butterfly-shaped metal patch layers 2 are arranged below the four metal small patches of the horizontal square metal patch 1. Each butterfly-shaped metal patch layer 2 includes an upper patch 2-1, a middle square patch 2-2, and a lower patch 2-3, forming a magnetic dipole, which is an integrated structure, specifically as follows:

[0062] The upper patch 2-1 is formed by bending a metal patch arranged vertically by 90° horizontally in the middle, with the corner direction outward. The length L on one side of the upper patch 2-1 2 is 1.34 mm and the width W 1 is 0.3 mm. To avoid contact with the feeding structure 5, a notch is provided at the upper corner. The length of one side of the notch is 0.28 mm and the width is 0.1 mm. The upper patch 2-1 is vertically arranged below two sides of a metal small patch in the horizontal square metal patch 1, and the two are in contact, where the two sides of the metal small patch are adjacent to the etched slit.

[0063] The middle square patch 2-2 is fitted and installed below the upper patch 2-1. The side length L of the middle square patch 2-2 3 is 0.5 mm, and one top corner of the middle square patch 2-2 coincides with the top corner at the corner of the upper patch 2-1.

[0064] The lower patch 2-3 is formed by bending a metal patch arranged vertically by 90° horizontally in the middle, with the corner direction inward, and the corner coincides with the other top corner of the middle square patch 2-2. The length L of the lower patch 2-3 4 is 0.7 mm and the width W 2 is 0.5 mm. That is, the two corners of the upper patch 2-1 and the lower patch 2-3 are located on the same diagonal of the middle square patch 2-2.

[0065] The horizontal square metal patch 1 and four structurally identical butterfly metal patch layers 2 form a complementary source. The horizontal square metal patch 1 dominates radiation at low frequencies, and the butterfly metal patch layer 2 dominates radiation at high frequencies. The operating frequencies of the low and high frequencies can be adjusted by adjusting the sizes of the horizontal metal patch 1 and each part of the vertical butterfly metal patch 2.

[0066] See Figure 2 、 Figure 3 、 Figure 4 , the feeding unit 5 is an L-shaped feeder structure, including a +45° feeding unit 5-1 and a -45° feeding unit 5-2, specifically as follows:

[0067] The +45° feeding unit 5-1 includes a vertical part 5-1-1 and a horizontal part 5-1-2, in a similar L-shaped structure. The horizontal part 5-1-2 is a horizontally arranged long strip structure with a length L 5 of 1.36 mm and a width W 3 of 0.09 mm. The vertical part 5-1-1 is provided with three bending structures downward along one end of the horizontal part 5-1-2, that is, the vertical part 5-1-1 is successively a vertical section A, a horizontal section A, a vertical section B, and a horizontal section B from top to bottom. Among them, the length of the vertical section A is 0.25 mm, and the width gradually changes from 0.09 mm to 0.12 mm. The length of the horizontal section A is 0.455 mm, and the width gradually changes from 0.12 mm to 0.15 mm. The length of the vertical section B is 0.75 mm, and the width gradually changes from 0.12 mm to 0.18 mm. The horizontal section B is square with a side length of 0.18 mm. The vertical section A and the horizontal section A are located above the middle square patch 2-2 and do not contact it. The gap range between the horizontal section A and the middle square patch 2-2 is 0.05 mm. The gap range between the vertical section B and the lower patch 2-3 is 0.05 mm. The center of the horizontal section B coincides with the center of the etched round hole of the metal floor 3. The horizontal section B is connected to the external feeding structure 8, and the external feeding structure 8 uses a coaxial connector.

[0068] The -45° feeding unit 5-2 includes a vertical part 5-2-1 and a horizontal part 5-2-2. The horizontal part 5-2-2 is a horizontally arranged long strip structure with a length L 6 of 1.29 mm and a width W 4 of 0.09 mm. The middle part is bent downward to avoid contacting the horizontal part 5-1-2, and the length of the bent part is 0.3 mm. The vertical part 5-2-1 has the same structure as the vertical part 5-1-1 and is arranged at the position of another butterfly metal patch layer 2.

[0069] After arrangement, the two butterfly-shaped metal patch layers 2 where the two feeding units are located are adjacent; the vertical segment A of the vertical part 5-1-1 of the +45° feeding unit 5-1 and the vertical segment A of the vertical part 5-2-1 of the -45° feeding unit 5-2 are both parallel to the upper patch 2-1 of the butterfly-shaped metal patch layer 2, the vertical segment B of the vertical part 5-1-1 of the +45° feeding unit 5-1 and the vertical segment B of the vertical part 5-2-1 of the -45° feeding unit 5-2 are both parallel to the lower patch 2-3 of the butterfly-shaped metal patch 2-1, and the horizontal segment A of the vertical part 5-1-1 of the +45° feeding unit 5-1 and the horizontal segment A of the vertical part 5-2-1 of the -45° feeding unit 5-2 are both parallel to the horizontal square metal patch 1. The vertical part 5-1-1 of the +45° feeding unit 5-1 and the vertical part 5-2-1 of the -45° feeding unit 5-2 respectively form two 50-ohm air microstrip lines with the butterfly-shaped metal patch layer 2. The horizontal part 5-1-2 of the +45° feeding unit 5-1 and the horizontal part 5-2-2 of the -45° feeding unit 5-2 are both parallel to the horizontal square metal patch 1, and the horizontal part 5-1-2 and the horizontal part 5-2-2 are inserted into the gap of the horizontal square metal patch 1 to achieve capacitive coupling feeding, and the inserted length can adjust the impedance matching of the antenna unit.

[0070] See Figure 1 、 Figure 5 The metal floor 3 is located at the bottom layer, and the lower patch 2-3 of the butterfly-shaped metal patch layer 2 is arranged in contact with the metal floor 3. After the four butterfly-shaped metal patch layers 2 are arranged, the corners of their four upper patches 2-1 are close to the position of the antenna central axis, and the corners of the four lower patches 2-3 are far from the position of the antenna central axis. Two round holes are etched on the metal floor 3, and the radius of the round holes is 0.3 mm to ensure that the horizontal segment B of the vertical part 5-1-1 does not contact the ground. The round holes are located at the positions of the lower patches 2-3 of two adjacent butterfly-shaped metal patch layers 2 close to the corners, and the centers of the two round holes coincide with the centers of the horizontal segment B of the vertical part 5-1-1 and the horizontal segment B of the vertical part 5-2-1 respectively. An external feeding structure 8 is arranged below the round holes, and the external feeding structure 8 is connected to the horizontal segment B for radio frequency signal input. Three metallized blind holes 4 are provided at each of the four top corners of the metal floor 3, and there is a gap of 0.3 mm between the top surface of the metallized blind hole 4 and the horizontal square metal patch 1. The radius of the metallized blind hole 4 is 0.15 mm, and the distance between the centers of adjacent metallized blind holes 4 is 0.46 mm. The metallized blind holes 4 can play a role in extending the current of the metal floor 3, increasing the equivalent ground size. The capacitive effect between the metallized blind holes 4 and the horizontal metal patch 1 can improve the impedance matching of the antenna unit and shift the resonance point of the antenna unit to the left, reducing the electrical size of the antenna.

[0071] See Figure 1, the medium 6 is filled in the structural space composed of the horizontal square metal patch 1, four structurally identical butterfly-shaped metal patch layers 2, the metal floor 3, the metallized blind vias 4, and the feeding structure 5, which is used to increase the electrical length of the antenna. The material of the medium 6 is TLY-5 with a relative dielectric constant of 2.2 and a loss tangent angle of 0.0009.

[0072] The dual-band dual-polarized magnetoelectric dipole antenna unit is fed through a coaxial connector, and the obtained S-parameters are as Figure 8 shown. The -10dB operating bandwidth of the antenna is 24.5 - 30.6GHz and 35.6 - 44.2GHz, and the isolation is greater than 15dB throughout the frequency band, realizing broadband characteristics in the low-frequency and high-frequency bands.

[0073] Figures 9(a) - (b) are the E-plane and H-plane radiation patterns of the dual-band dual-polarized magnetoelectric dipole antenna unit proposed by the present invention at 26.5GHz and 41GHz when fed at port 1 and port 2, including co-polarization and cross-polarization, with a gain greater than 5dBi and a cross-polarization ratio greater than 21dB in the broadside direction.

[0074] Figure 7 is a schematic structural diagram of the dual-band dual-polarized magnetoelectric dipole 1×4 antenna array proposed by the present invention. The antenna array is composed of four structurally identical dual-band dual-polarized magnetoelectric dipole antenna units and two quasi-magnetic current structures 7. The four antenna units are arranged side by side at equal intervals, and the two quasi-magnetic current structures 7 are located on the left and right sides of the antenna unit assembly. The +45° feeding units 5-1 and -45° feeding units 5-2 placed on each antenna unit are ports 1, 3, 5, 7 and ports 2, 4, 6, 8 respectively, with a total of 8 ports. The four ports on the first and second antenna units and the four ports on the third and fourth antenna units are mirror-symmetric about the array center, that is, ports 1, 2, 3, 4 and ports 5, 6, 7, 8 are mirror-symmetric about the array center respectively. The distance L 7 between the center points of adjacent millimeter-wave dual-band dual-polarized magnetoelectric dipole antenna units is 0.4mm, and the distance L 8 between the quasi-magnetic current structure 7 and its adjacent antenna unit is 0.29mm, and the overall size of the array is 4mm×18mm×1mm.

[0075] Refer to Figure 8 , the described quasi-magnetic current structure 7 is composed of a rectangular metal patch 7-1, a metallized via 7-2, and the metal floor 3. The rectangular metal patch 7-1 is parallel to the horizontal square metal patch 1, the metallized via 7-2 is parallel to the metallized blind via 4, and the length L 9 of the rectangular metal patch 7-1 is 4mm, and the width W 5It is 0.905 mm. The pseudo-magnetic current structure 7 can form slots in the xoy direction with the adjacent horizontal square metal patch 1 and metallized blind via 4, radiating the array energy in non-edge radiation directions, and increasing the beam width of the antenna element and the scanning angle of the array.

[0076] Figure 11 These are the S-parameter results of the dual-band and dual-polarized magnetoelectric dipole antenna array proposed by the present invention. The operating bandwidth of the antenna array is 25.4 - 29.4 GHz and 35 - 44.5 GHz, and the isolation between ports is greater than 10 dB.

[0077] Figures 12(a) to (d) are the beam scanning results of the dual-band and dual-polarized magnetoelectric dipole antenna array proposed by the present invention at 26.5 GHz, 37 GHz, 41 GHz, and 43 GHz, and their 3 dB scanning angles are -58° to 58°, -62° to 62°, -47° to 47°, and -54° to 54° respectively.

[0078] The above embodiments only represent the implementation manners of the present invention, but should not be construed as limiting the scope of the present invention patent. It should be noted that for those skilled in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. A dual - band and dual - polarization magnetoelectric dipole antenna array for millimeter - wave mobile terminals, characterized in that, it is composed of a plurality of dual - band and dual - polarization magnetoelectric dipole antenna units with the same structure arranged and combined. Each of the dual - band and dual - polarization magnetoelectric dipole antenna units includes a horizontal square metal patch (1), four butterfly - shaped metal patch layers (2) with the same structure, a metal floor (3), metallized blind vias (4), a feeding structure (5), and a dielectric (6) filled in the above structures. Among them, the feeding structure (5) includes a +45° feeding unit (5 - 1) and a - 45° feeding unit (5 - 2); The horizontal square metal patch (1) is composed of four square metal patches with the same structure, located at the top layer of the antenna unit. There are gaps between adjacent small patches, forming an electric dipole. In order to avoid contact with the feeding structure (5), a slit is etched inward at the feeding positions of the four small patches. The horizontal part of the feeding structure (5) arranged in a cross - flower pattern is placed between two diagonal slits. The intersection of the +45° feeding unit (5 - 1) and the - 45° feeding unit (5 - 2) does not contact, and the ends of the two feeding units are placed in the corresponding small - patch slits without contacting the slit edges; The four butterfly - shaped metal patch layers (2) are arranged below the four square metal patches of the horizontal square metal patch (1). Each of the butterfly - shaped metal patch layers (2) includes an upper - layer patch (2 - 1), a middle - layer square patch (2 - 2), and a lower - layer patch (2 - 3), forming a magnetic dipole, which is an integrated structure, specifically as follows: The upper - layer patch (2 - 1) is formed by bending a vertically arranged metal patch 90° horizontally in the middle. In order to avoid contact with the feeding structure (5), there is a notch on the upper part at the corner. The two sides of the upper - layer patch (2 - 1) are arranged below the two sides of the square metal patch adjacent to the slit; The middle - layer square patch (2 - 2) is horizontally installed below the upper - layer patch (2 - 1). One vertex angle of the middle - layer square patch (2 - 2) coincides with the vertex angle at the corner of the upper - layer patch (2 - 1). Here, one vertex angle of the middle - layer square patch (2 - 2) is defined as vertex angle A; The lower - layer patch (2 - 3) is formed by bending a vertically arranged metal patch 90° horizontally in the middle, and the corner coincides with the other vertex angle of the middle - layer square patch (2 - 2). Here, the other vertex angle of the middle - layer square patch (2 - 2) refers to the vertex angle that is diagonal to vertex angle A; The horizontal square metal patch (1) and the four butterfly - shaped metal patch layers (2) with the same structure form a complementary source. The horizontal square metal patch (1) dominates the radiation at low frequencies, and the butterfly - shaped metal patch layers (2) dominate the radiation at high frequencies. The operating frequencies of the low - frequency and high - frequency can be adjusted by adjusting the sizes of the horizontal square metal patch (1) and the respective parts of the vertical butterfly - shaped metal patches; The described metal floor (3) is located at the bottom layer. After arranging the four butterfly-shaped metal patch layers (2), the corners of the four upper patches (2-1) are close to the position of the antenna central axis, and the corners of the four lower patches (2-3) are far from the position of the antenna central axis; Two round holes are etched on the metal floor (3) to ensure that the horizontal section B of the vertical part does not contact the ground. An external feeding structure (8) is arranged below the round holes, and the external feeding structure (8) is connected to the horizontal section B for radio frequency signal input; A plurality of metallized blind holes (4) are provided at the four top corners of the metal floor (3), and there is a gap between the top surface of the metallized blind holes (4) and the horizontal square metal patch (1). The described feeding structure (5) is an L-shaped feeder structure, including a +45° feeding unit (5-1) and a -45° feeding unit (5-2), specifically as follows: The +45° feeding unit (5-1) is an L-shaped structure, including a vertical part (5-1-1) and a horizontal part (5-1-2); The horizontal part (5-1-2) is a long strip structure arranged horizontally; The vertical part (5-1-1) is provided with three bending structures downward along one end of the horizontal part (5-1-2), that is, the vertical part (5-1-1) is successively a vertical section A, a horizontal section A, a vertical section B, and a horizontal section B from top to bottom. The height of the vertical section A is less than the height of the upper patch (2-1), the horizontal section A is located above the middle square patch (2-2) and does not contact it, the height of the vertical section B is greater than the height of the lower patch (2-3), the center of the horizontal section B coincides with the center of the round hole etched on the metal floor (3), and the horizontal section B is connected to the external feeding structure (8). The -45° feeding unit (5-2) includes a vertical part (5-2-1) and a horizontal part (5-2-2); The horizontal part (5-2-2) is a long strip structure arranged horizontally, and its middle part is bent downward so as not to contact the horizontal part (5-1-2); The vertical part (5-2-1) of the -45° feeding unit (5-2) has the same structure as the vertical part (5-1-1) of the +45° feeding unit (5-1) and is arranged at the position of another butterfly-shaped metal patch layer (2). The described dielectric (6) is filled in the structural space composed of the horizontal square metal patch (1), the four butterfly-shaped metal patch layers (2) with the same structure, the metal floor (3), the metallized blind holes (4), and the feeding structure (5) to increase the electrical length of the antenna. The described millimeter-wave dual-band and dual-polarized magnetoelectric dipole antenna array is composed of four dual-band and dual-polarized magnetoelectric dipole antenna units with the same structure and two magnetic current-like structures (7). The four antenna units are arranged in parallel at equal intervals. The two magnetic current-like structures (7) are located on the left and right sides of the antenna unit assembly. The positions of the +45° feeding unit (5-1) and the -45° feeding unit (5-2) placed on each antenna unit are respectively ports, with a total of 8 ports. The four ports on the first and second antenna units and the four ports on the third and fourth antenna units are mirror-symmetric about the center of the array.

2. A dual - band and dual - polarization magnetoelectric dipole antenna array for a millimeter - wave mobile phone terminal according to claim 1, characterized in that, the gap size between adjacent small patches of the horizontal square metal patch (1) is 0.35 - 0.55 mm; the gap size etched at the feeding position of each small patch is: length is 0.58 - 0.68 mm, width is 0.15 - 0.25 mm, where the length is along the diagonal direction of the patch; the gap range between the top surface of the metallized blind hole (4) and the horizontal square metal patch (1) is 0.2 - 0.6 mm; in the +45° feeding unit (5 - 1), the gap range between the horizontal section A and the middle square patch (2 - 2) is 0.03 - 0.1 mm, and the gap range between the vertical section B and the lower - layer patch (2 - 3) is 0.03 - 0.1 mm.

3. A dual - band and dual - polarization magnetoelectric dipole antenna array for a millimeter - wave mobile phone terminal according to claim 1, characterized in that, the two circular holes etched on the metal floor (3) are located at the positions near the corners of the lower - layer patches (2 - 3) of any two adjacent butterfly - shaped metal patch layers (2), and the centers of the two circular holes coincide with the centers of the horizontal section B of the vertical part (5 - 1 - 1) of the +45° feeding unit (5 - 1) and the horizontal section B of the vertical part (5 - 2 - 1) of the - 45° feeding unit (5 - 2) respectively.

4. A dual - band and dual - polarization magnetoelectric dipole antenna array for a millimeter - wave mobile phone terminal according to claim 1, characterized in that, after the feeding structure (5) is arranged, the two butterfly - shaped metal patch layers (2) where the two feeding units are located are adjacent; the vertical section A of the vertical part (5 - 1 - 1) of the +45° feeding unit (5 - 1) and the vertical section A of the vertical part (5 - 2 - 1) of the - 45° feeding unit (5 - 2) are both parallel to the upper - layer patch (2 - 1) of the butterfly - shaped metal patch layer (2), the vertical section B of the vertical part (5 - 1 - 1) of the +45° feeding unit (5 - 1) and the vertical section B of the vertical part (5 - 2 - 1) of the - 45° feeding unit (5 - 2) are both parallel to the lower - layer patch (2 - 3) of the butterfly - shaped metal patch layer (2), the horizontal section A of the vertical part (5 - 1 - 1) of the +45° feeding unit (5 - 1) and the horizontal section A of the vertical part (5 - 2 - 1) of the - 45° feeding unit (5 - 2) are both parallel to the horizontal square metal patch (1); the vertical part (5 - 1 - 1) of the +45° feeding unit (5 - 1) and the vertical part (5 - 2 - 1) of the - 45° feeding unit (5 - 2) respectively form two 50 - ohm air microstrip lines with the butterfly - shaped metal patch layer (2); the horizontal part (5 - 1 - 2) of the +45° feeding unit (5 - 1) and the horizontal part (5 - 2 - 2) of the - 45° feeding unit (5 - 2) are both parallel to the horizontal square metal patch (1), and the horizontal part (5 - 1 - 2) and the horizontal part (5 - 2 - 2) are inserted into the gap of the horizontal square metal patch (1) to achieve capacitive - coupling feeding, and the inserted length can adjust the impedance matching of the antenna unit.

5. A dual - band and dual - polarization magnetoelectric dipole antenna array for millimeter - wave mobile terminals according to claim 1, characterized in that, In the millimeter-wave dual-band and dual-polarized magnetoelectric dipole antenna array, the distance between the centers of adjacent millimeter-wave dual-band and dual-polarized magnetoelectric dipole antenna elements is L 7 , L 7 in the range of 0.4 to 0.5 mm; the distance between the magneto-current-like structure (7) and its adjacent antenna element is L 8 , L 8 in the range of 0.1 to 0.4 mm.

6. A dual - band and dual - polarization magnetoelectric dipole antenna array for millimeter - wave mobile terminals according to claim 1, characterized in that, The described magneto-fluid-like structure (7) is composed of a rectangular metal patch (7-1), a metallized via hole (7-2), and a metal floor (3). Among them, the rectangular metal patch (7-1) is parallel to the horizontal square metal patch (1), and the metallized via hole (7-2) is parallel to the metallized blind via hole (4). The magneto-fluid-like structure (7) can form a slot in the xoy direction with the adjacent horizontal square metal patch (1) and metallized blind via hole (4), radiating the array energy in a non-edge radiation direction, increasing the beam width of the antenna element and the scanning angle of the array. By adjusting the distance between the magneto-fluid-like structure (7) and the adjacent antenna element L 8 it is possible to adjust the beam width of the antenna elements on both sides.

7. A usage process of the dual - band and dual - polarization magnetoelectric dipole antenna array for millimeter - wave mobile terminals according to any one of claims 1 - 6, characterized in that, includes the following: The radio - frequency signal is input through an external feeding structure (8). The external feeding structure (8) is connected to the horizontal section B of the vertical part (5 - 1 - 1) of the + 45° feeding unit (5 - 1) and the horizontal section B of the vertical part (5 - 2 - 1) of the - 45° feeding unit (5 - 2). The signal is fed into from the horizontal section B and is input to the horizontal part of the feeding unit along the butterfly - shaped metal patch layer (2) respectively. The horizontal part of the feeding unit is inserted into the horizontal square metal patch (1) for capacitive - coupling feeding. The radio - frequency signal enters the antenna unit through capacitive - coupling feeding. The metallized blind via (4) extends the current of the metal floor (3) and forms a capacitive effect with the horizontal square metal patch (1). The dielectric (6) inside the antenna adjusts the electrical length of the antenna; The radiation of the horizontal square metal patch (1) as an electric dipole dominates at low frequencies, and the surface current is distributed at the edge of the patch. Through the + 45° feeding unit (5 - 1) and the - 45° feeding unit (5 - 2), currents in the + 45° direction and the - 45° direction are formed respectively; The radiation of the butterfly - shaped metal patch layer (2) as a magnetic dipole dominates at high frequencies. Through the + 45° feeding unit (5 - 1) and the - 45° feeding unit (5 - 2), magnetic currents in the - 45° direction and the + 45° direction are formed respectively at the gap between the horizontal square metal patches (1). The current and the magnetic current are orthogonal and have the same phase center. The electric dipole and the magnetic dipole work as complementary sources; The quasi - magnetic - current structure (7) can form a slot in the xoy direction with the adjacent horizontal square metal patch (1) and the metallized blind via (4). The radio - frequency signal is fed into the antenna array through the external feeding structure (8), and the beam scanning of the array is controlled by changing the excitation phase of the fed radio - frequency signal.

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