Novel highly-compact dual-polarization common-aperture end-on-fire antenna
By adopting a common diameter design of vertically polarized and horizontally polarized radiation structures in the millimeter wave band, combining the substrate to integrate the waveguide cavity and metal sheet, the problems of low integration and radiation efficiency of dual-polarized antennas in the prior art are solved, and a dual-polarized antenna with high integration and high radiation efficiency are achieved.
Patent Information
- Application Number
- CN202510534738.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-27
- Publication Date
- 2025-07-08
AI Technical Summary
Research on existing dual-polar antennas in millimeter wave bands is limited, and traditional microstrip dual-polar antennas are difficult to achieve a highly compact common-diameter structure, resulting in low integration and radiation efficiency.
The vertical polarization and horizontal polarization radiation structure is adopted, combined with the substrate integrated waveguide cavity and metal sheet design, to achieve dual-polarized radiation with a common diameter, and the horizontal polarization feed structure is designed inside the substrate integrated waveguide cavity to expand the working bandwidth and improve space utilization.
High integration and high radiation efficiency in the millimeter wave band are achieved, the antenna size is reduced, the spectrum utilization and the sensitivity of the communication system are improved.
Smart Images
Figure CN120280704A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of communication antennas, and particularly to a dual-polarized common-aperture end-fire antenna. Background Art
[0002] With the development of wireless communication systems, the number of users has increased significantly, resulting in increasingly scarce spectrum resources. To improve the spectrum utilization rate, the antenna part in communication systems urgently needs to implement the dual-polarization function. A dual-polarized antenna can simultaneously form a pair of electromagnetic waves with orthogonal polarization modes and the same operating frequency. This is conducive to frequency reuse, enabling co-transmission and co-reception, polarization diversity, and polarization agility. At the same time, it can also improve the sensitivity of communication systems and resist multipath fading. In mobile communication systems, the base station polarization separation system of dual-polarized antennas can effectively eliminate the multipath fading phenomenon of signals; in satellite communication, the dual-polarization characteristics of antennas can improve the spectrum utilization rate, thus saving spectrum resources. Meanwhile, the millimeter-wave band (24 - 100 GHz) has become a recent research hotspot for antennas due to its large bandwidth, high data rate, and precise beam control capabilities. However, millimeter-wave systems face significant challenges: large high-frequency path losses, high integration complexity of millimeter-wave devices, and the need to balance multi-polarization multiplexing capabilities to increase channel capacity. At present, research on highly integrated dual-polarized antennas in the millimeter-wave band is very limited, and most millimeter-wave dual-polarized antennas radiate in a non-common-aperture form, which will inevitably reduce the integration degree of the antenna. While traditional microstrip dual-polarized antennas can achieve a common-aperture structure, it is difficult to achieve a highly compact structure. Summary of the Invention
[0003] The purpose of the present invention is to provide a novel highly compact dual-polarized low-profile end-fire antenna.
[0004] To achieve the above purpose, the technical solution adopted by the present invention is as follows:
[0005] A novel highly compact dual-polarized common-aperture end-fire antenna, the characteristics of which include:
[0006] A vertical polarization radiation structure, including a substrate integrated waveguide cavity with an open end and an H-shaped slot (54) for radiating vertical polarization signals;
[0007] A horizontal polarization radiation structure, including four L-shaped metal sheets connecting the substrate integrated waveguide cavities and two rectangular open slots etched on the upper and lower surfaces of the substrate integrated waveguide cavity for radiating horizontal polarization signals;
[0008] A vertical polarization feeding structure, located on the upper surface of the substrate integrated waveguide cavity, for transmitting radio frequency energy to the vertical polarization radiation structure;
[0009] The horizontal polarization feeding structure is located inside the substrate integrated waveguide cavity and is used to transmit radio frequency energy to the horizontal polarization radiation structure;
[0010] Furthermore, the main feeder (3) is a microstrip transmission line that feeds the substrate integrated waveguide cavity and the H-shaped slot (54) through a metal probe (7). The excited substrate integrated waveguide cavity and the H-shaped slot (54) are coupled to each other to jointly radiate a vertically polarized signal; the horizontal polarization feeding structure is a strip transmission line that feeds four L-shaped metal sheets. The four L-shaped metal sheets are excited by the horizontal polarization feeding structure to generate an electric dipole radiation mode and co-aperture radiate with the vertical polarization radiation structure; the novel highly compact dual-polarization co-aperture end-fire antenna is placed along the xoz plane.
[0011] Furthermore, the end-open substrate integrated waveguide cavity sequentially includes a first metal sheet (21), a first row of metal vias (51), a first column of metal vias (52), a second column of metal vias (53), a second dielectric layer (12), a third dielectric layer (12), and a third metal sheet (23) from top to bottom; the end of the substrate integrated waveguide cavity is open towards the z-axis and is used to generate a vertically polarized radiation; the first metal sheet (21) is located between the first dielectric layer (11) and the second dielectric layer (12); the third metal sheet (23) is located at the bottom of the third dielectric layer (13); the upper surfaces of the first row of metal vias (51), the first column of metal vias (52), and the second column of metal vias (53) are connected to the first metal sheet (21), and the lower surfaces are connected to the third metal sheet (23), and they penetrate through the first dielectric layer (11) and the second dielectric layer (12) in the middle; the H-shaped slot (54) is etched on the first metal sheet (21).
[0012] Furthermore, the H-shaped slot (54) changes the current distribution of the first metal sheet (21), can increase new resonance points, thereby expanding the working bandwidth of the vertical polarization; the H-shaped slot (54) is coupled to the end-open substrate integrated waveguide cavity during operation, thereby improving the radiation pattern of the vertical polarization of the antenna.
[0013] Furthermore, the horizontal polarization radiation structure includes a first L-shaped metal sheet (61), a second L-shaped metal sheet (62), a third L-shaped metal sheet (63), a fourth L-shaped metal sheet (64), a first rectangular opening slot (41) and a second rectangular opening slot (42); the first L-shaped metal sheet (61) is located at the end of the first metal sheet (21), with an isosceles triangle cut off, and the open end faces the positive x-axis direction; the second L-shaped metal sheet (62) is mirror symmetric to the first L-shaped metal sheet (61) about the z-axis; the third L-shaped metal sheet (63) is located at the end of the third metal sheet (23), with a first isosceles right triangle (8) cut off, and the open end faces the positive x-axis direction; the fourth L-shaped metal sheet (64) is mirror symmetric to the third L-shaped metal sheet (63) about the z-axis; the first rectangular opening slot (41) is etched on the first metal sheet (21); the second rectangular opening slot (42) is etched on the third metal sheet (23); the openings of the first rectangular opening slot (41) and the second rectangular opening slot (42) are located at the center positions of the side lengths close to the ends of the metal sheets.
[0014] Furthermore, the first L-shaped metal sheet (61) and the second L-shaped metal sheet (62) form a dipole structure; the third L-shaped metal sheet (63) and the fourth L-shaped metal sheet (64) form a dipole structure; the two dipole structures are provided with differential signals by the horizontal polarization feeding structure and jointly radiate horizontal polarization signals.
[0015] Furthermore, the vertical polarization feeding structure is composed of a first rectangular metal block (31), a second rectangular metal block (32), a third rectangular metal block (33), an irregular metal block (34), a first metal sheet (21), a first dielectric layer (11), a metal probe (7) and a third metal sheet (23); the first rectangular metal block (31), the second rectangular metal block (32), the third rectangular metal block (33) and the irregular metal block (34) are located on the upper surface of the first dielectric layer (11); the irregular metal block (34) includes a rectangular metal sheet and a circular metal sheet, and forms a main feeder with the first rectangular metal block (31) and the second rectangular metal block (32), and is arranged along the z-axis direction; the third metal block (33) is connected to the irregular rectangular metal block (34) and is placed along the negative x-axis direction, acting as a microstrip open stub for canceling the inductive reactance characteristic of the antenna impedance; the upper end of the metal probe (7) is connected to the irregular metal block (34), and the lower end is connected to the third metal sheet (23), passing through but not connected to the first metal sheet (21).
[0016] Further, the horizontal polarization feeding structure includes, from top to bottom, a first metal sheet (21), a second dielectric layer (12), a second metal sheet (22), a third dielectric layer (13), and a third metal sheet (24). The second metal sheet (22) is arranged in a Γ shape and is located between the second dielectric layer (12) and the third dielectric layer (13). Two second isosceles right triangles (9) are cut off from the second metal sheet (22), and the end is an open-circuit structure, which is used to adjust the matching characteristics of horizontal polarization radiation.
[0017] Further, the first dielectric layer (11), the second dielectric layer (12), and the third dielectric layer (12) are made of Rogers RT5880 material, with a dielectric constant of 2.2 and a tangent loss of 0.0009.
[0018] Compared with the prior art, the present invention has the following advantages:
[0019] 1. Compared with a conventional dual-polarized antenna, the novel highly compact dual-polarized common-aperture end-fire antenna of the present invention adopts a common-aperture technology, which improves the integration of the antenna.
[0020] 2. The novel highly compact dual-polarized common-aperture end-fire antenna of the present invention arranges the horizontal polarization feeding structure inside the substrate integrated waveguide cavity, which improves the space utilization rate.
[0021] 3. Compared with the radiation of a conventional open-type substrate integrated waveguide cavity, the novel highly compact dual-polarized common-aperture end-fire antenna of the present invention adopts a slot coupling technology, which improves the radiation efficiency of the antenna. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 is a schematic diagram of the overall structure of the novel highly compact dual-polarized common-aperture end-fire antenna of the present invention;
[0023] Figure 2 is a top view of the novel highly compact dual-polarized common-aperture end-fire antenna of the present invention;
[0024] Figure 3 is a top view of the second dielectric layer of the novel highly compact dual-polarized common-aperture end-fire antenna of the present invention;
[0025] Figure 4 is a bottom view of the novel highly compact dual-polarized common-aperture end-fire antenna of the present invention;
[0026] Figure 5 is a graph of the vertical polarization reflection coefficient and gain of the novel highly compact dual-polarized common-aperture end-fire antenna of the present invention;
[0027] Figure 6For the novel highly compact dual-polarized common-aperture end-fire antenna of the present invention, the main polarization and cross-polarization patterns of the vertical polarization in the E-plane at 34 GHz are shown;
[0028] Figure 7 The horizontal polarization reflection coefficient and gain curve of the novel highly compact dual-polarized common-aperture end-fire antenna of the present invention are shown;
[0029] Figure 8 For the novel highly compact dual-polarized common-aperture end-fire antenna of the present invention, the main polarization and cross-polarization patterns of the horizontal polarization in the E-plane at 34 GHz are shown. Detailed implementation manners
[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.
[0031] In the description of the present invention, it should be understood that for the orientation description, such as the orientation or positional relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention. For the description of the serial numbers, the first serial number represents the large structure, the second serial number is the accessory structure in the large structure, and the third serial number is the small structure of the accessory structure. For example, the 3rd, 34th, and 341st structures. The 3rd structure represents the main feeder structure, the 34th represents the irregular metal block structure in the main feeder structure, and the 341st represents the rectangular metal sheet in the irregular metal block structure.
[0032] In order to improve the integration of dual-polarized antennas in the millimeter-wave band, the present invention provides a novel highly compact dual-polarized common-aperture end-fire antenna. Based on the substrate integrated waveguide technology, the present invention loads metal sheets on the substrate integrated waveguide cavity, realizing the dual-polarization function and the common-aperture structure at the same time. The present invention designs the horizontal polarization feeding structure inside the substrate integrated waveguide cavity, further reducing the size of the antenna.
[0033] The specific implementation of the present invention will be described in detail below with reference to the accompanying drawings.
[0034] As Figures 1 - 4As shown, the novel highly compact dual-polarized co-aperture end-fire antenna structure includes a vertical polarization radiation structure, a horizontal polarization radiation structure, a vertical polarization feeding structure, and a horizontal polarization feeding structure; the antenna is horizontally placed along the xoz plane;
[0035] The vertical polarization radiation structure includes, from top to bottom, a first metal sheet (21), a second dielectric layer (12), a first metal via column (52), a second metal via column (53), a first metal via row (51), a third dielectric layer (13), and a third metal sheet (23); the first metal sheet (21) is placed between the first dielectric layer (11) and the second dielectric layer (12); the first metal sheet (21) is set as a rectangular metal sheet etched with an H-shaped slot (54) and a first rectangular opening slot (41), the length of the rectangular metal sheet is 7.7 mm, and the width is 4.9 mm; the length of the horizontal slot in the middle of the H-shaped slot (54) is 3.6 mm, the width is 0.24 mm, the length of the two side branches is set to 0.8 mm, and the width is set to 0.2 mm; the length of the first rectangular opening slot (41) is set to 1.6 mm, the width is set to 0.7 mm, the opening is located at the center of the side length in the positive z-axis direction, and the opening length is set to 0.24 mm; the lengths of the second dielectric layer (12) and the third dielectric layer (13) are set to 10.7 mm, the width is 6 mm, and the height is 0.762 mm; the first metal via column (52) includes ten circular metal vias with a radius of 0.2 mm and a spacing of 0.5 mm, all the circular metal vias are arranged along the z-axis, the upper end is connected to the first metal sheet (21), the lower end is connected to the third metal sheet (23), and it penetrates the second dielectric layer (12) and the third dielectric layer (13); the second metal via column (53) is mirror-symmetrical to the first metal via column (52) about the z-axis; the first metal via row (51) includes ten rows of circular metal vias, all the circular metal vias are arranged along the x-axis, the upper end is connected to the first metal sheet (21), the lower end is connected to the third metal sheet (23), and it penetrates the second dielectric layer (12) and the third dielectric layer (13), the radius of the metal via is 0.2 mm, and the spacing is 0.5 mm; the first metal via column (52) and the second metal via column (53) share the first two metal vias at the beginning of the first metal row; the second metal sheet (22) is placed between the second dielectric layer (12) and the third dielectric layer (13), the width is set to 0.56 mm, and the length is set to 6.24 mm; the third metal sheet (23) is a rectangular metal sheet etched with a second rectangular opening slot (42); the size of the third metal sheet (23) is the same as that of the second metal sheet (22); the size of the second rectangular opening slot (42) is the same as that of the first rectangular opening slot (41).
[0036] The horizontally polarized radiation structure includes, from top to bottom, a first L-shaped metal sheet (61), a second L-shaped metal sheet (62), a first open rectangular slot (41), a third L-shaped metal sheet (63), a fourth L-shaped metal sheet (64), and a second rectangular slot (42); the first L-shaped metal sheet (61) is located on the upper surface of the first dielectric layer (11); the first L-shaped metal sheet (61) is perpendicularly connected to the first metal sheet (21), and the length of the metal branch at the connection is set to 0.28 mm and the width is set to 0.3 mm; the length of the branch at the open end of the first L-shaped metal sheet (61) is 2.02 mm and the width is 1 mm, and a first isosceles right triangle (8) with a side length of 1 mm is cut off; the second L-shaped metal sheet (62) is mirror-symmetrical to the first L-shaped metal sheet (61) about the z-axis; the third L-shaped metal sheet (63) has the same shape and size as the first L-shaped metal sheet, but is perpendicularly connected to the second metal sheet (22); the fourth L-shaped metal sheet (64) is mirror-symmetrical to the third L-shaped metal sheet (63) about the z-axis;
[0037] The vertically polarized feeding structure includes, from top to bottom, a first rectangular metal block (31), a second rectangular metal block (32), a third rectangular metal block (33), an irregular metal block (34), a metal probe (7), a first dielectric layer (11), and a first metal sheet (21); the first rectangular metal block (31) is set to be 0.5 mm in length and 0.257 mm in width, and one end is connected to the second rectangular metal sheet (32); the second rectangular metal sheet (32) is set to be 2 mm in length and 0.15 mm in width, one end is connected to the first rectangular metal block (31), and one end is connected to the irregular metal block (34); the irregular metal block (34) includes a rectangular metal block (341) and a circular metal block (342), the circular metal block (342) is connected to the metal probe (7), and the rectangular metal block (341) is connected to the second rectangular metal block (32) and the third rectangular metal block (33); the radius of the circular metal block (342) is 0.2 mm; the width of the rectangular metal block (341) is 0.26 mm and the length is 2.05 mm; the third rectangular metal block (33) has one end connected to the irregular metal block (34), is placed along the positive x-axis direction, has a length of 0.54 mm and a width of 0.28 mm; the first rectangular metal block (31), the second rectangular metal block (32), the third rectangular metal block (33), and the irregular metal block (34) are all located on the upper surface of the first dielectric layer (11); the metal probe (7) is a cylindrical metal column with a radius of 0.075 m and a height of 1.614 m, the upper end is connected to the irregular metal block (34), the lower end is connected to the third metal sheet (23), and it penetrates through the first dielectric layer (11), the first metal sheet (21), the second dielectric layer (12), and the third dielectric layer (13), but is not connected to the first metal sheet (21); in order not to be connected to the metal probe (7), a circular hole with a radius of 0.1 mm is etched on the first metal sheet (21).
[0038] The horizontally polarized feeding structure includes a first metal sheet (21), a second dielectric layer (22), a second metal sheet (22), and a third dielectric layer (12) from top to bottom; the second metal sheet (22) is located between the second dielectric layer (12) and the third dielectric layer (13); the second metal sheet (22) has a length of 6.24 mm and a width of 0.56 mm; the second metal sheet (22) is arranged in a Γ shape and two second isosceles right triangles (9) with side lengths of 0.56 mm are cut off.
[0039] The three dielectric layers (11)(12)(13) are made of Rogers RT5880 material, with a relative dielectric constant of 2.2 and a tangent loss value of 0.009.
[0040] Figure 5 This is the graph of the vertical polarization reflection coefficient and gain of the novel highly compact dual-polarized co-aperture end-fire antenna of the present invention. It can be seen that the vertical polarization can achieve a reflection coefficient lower than -10 dB in the range of 32.46 GHz - 34.4 GHz. The maximum gain of the vertical polarization can reach 4.85 dBi.
[0041] Figure 6 This is the radiation pattern of the vertical polarization of the novel highly compact dual-polarized co-aperture end-fire antenna of the present invention at 346 Hz. It can be seen that the main lobe of the vertical polarization of this antenna is offset by 30°, the back lobe level is about -5 dBi, and the cross-polarization level is lower than -8 dBi.
[0042] Figure 7 This is the graph of the horizontal polarization reflection coefficient and gain of the novel highly compact dual-polarized co-aperture end-fire antenna of the present invention. It can be seen that the horizontal polarization can achieve a reflection coefficient lower than -10 dB in the range of 25.6 GHz - 40.7 GHz. The maximum gain of the horizontal polarization can reach 5.8 dBi.
[0043] Figure 8 This is the radiation pattern of the horizontal polarization of the novel highly compact dual-polarized co-aperture end-fire antenna of the present invention at 34 GHz. It can be seen that the main lobe of the horizontal polarization of this antenna is also in the 30° direction, and the cross-polarization level is lower than -8 dBi.
[0044] As can be seen from the above, the present invention has the advantages of a highly compact structure, a low profile, and low cost.
[0045] As described above, it is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.
Claims
1. A novel highly compact dual-polarized common-aperture end-fire antenna, characterized in that, Comprising: A vertically polarized radiation structure, including a substrate integrated waveguide cavity with an open end and an H-shaped slot (54) for radiating vertically polarized signals; A horizontally polarized radiation structure, including an L-shaped metal sheet connected to the substrate integrated waveguide cavity and rectangular open slots etched on the upper and lower surfaces of the substrate integrated waveguide cavity, sharing the same aperture with the vertically polarized radiation structure; A vertically polarized feeding structure, including a main feeder (3) and a metal probe (7), located on the upper surface of the substrate integrated waveguide cavity, for transmitting radio frequency energy to the vertically polarized radiation structure; A horizontally polarized feeding structure, located inside the substrate integrated waveguide cavity, for transmitting radio frequency energy to the horizontally polarized radiation structure; The main feeder (3) is a microstrip transmission line, which transmits energy to the substrate integrated waveguide cavity and the H-shaped slot (54) through the metal probe (7). The excited substrate integrated waveguide cavity and the H-shaped slot (54) are mutually coupled to jointly radiate vertically polarized signals. The horizontally polarized feeding structure is a strip transmission line that feeds the L-shaped metal sheet. The L-shaped metal sheet is excited by the horizontally polarized feeding structure to generate an electric dipole radiation mode and radiates with the vertically polarized radiation structure sharing the same aperture. The novel highly compact dual-polarized co-aperture end-fire antenna is placed along the xoz plane.
2. According to claim 1, the novel highly compact dual-polarized low-profile end-fire antenna is characterized in that The open-end substrate integrated waveguide cavity from top to bottom successively includes a first metal sheet (21), a first row of metal vias (51), a first column of metal vias (52), a second column of metal vias (53), a second dielectric layer (12), a third dielectric layer (12), and a third metal sheet (23). The end of the substrate integrated waveguide cavity is open towards the z-axis for generating vertically polarized radiation. The first metal sheet (21) is located between the first dielectric layer (11) and the second dielectric layer (12). The third metal sheet (23) is located at the bottom of the third dielectric layer (13). The upper surfaces of the first row of metal vias (51), the first column of metal vias (52), and the second column of metal vias (53) are connected to the first metal sheet (21), and the lower surfaces are connected to the third metal sheet (23), passing through the first dielectric layer (11) and the second dielectric layer (12) in the middle. The H-shaped slot (54) is etched on the first metal sheet (21).
3. According to claim 2, the novel highly compact dual-polarized low-profile end-fire antenna is characterized in that, The H-shaped slot (54) changes the current distribution of the first metal sheet (21). The H-shaped slot (54) is coupled with the open-end substrate integrated waveguide cavity during operation.
4. According to claim 1, the novel highly compact dual-polarized low-profile end-fire antenna is characterized in that, The horizontal polarization radiation structure includes a first L-shaped metal sheet (61), a second L-shaped metal sheet (62), a third L-shaped metal sheet (63), a fourth L-shaped metal sheet (64), a first rectangular opening groove (41) and a second rectangular opening groove (42); the first L-shaped metal sheet (61) is located at the end of the first metal sheet (21), a first isosceles right triangle (8) is cut off, and the open end faces the positive x-axis direction; the second L-shaped metal sheet (62) is mirror-symmetrical to the first L-shaped metal sheet (61) about the z-axis; the third L-shaped metal sheet (63) is located at the end of the third metal sheet (23), a first isosceles right triangle (8) is cut off, and the open end faces the positive x-axis direction; the fourth L-shaped metal sheet (64) is mirror-symmetrical to the third L-shaped metal sheet (63) about the z-axis; the first rectangular opening groove (41) is etched on the first metal sheet (21); the second rectangular opening groove (42) is etched on the third metal sheet (23); the openings of the first rectangular opening groove (41) and the second rectangular opening groove (42) are located at the central positions of the side lengths close to the ends of the metal sheets.
5. According to claim 4, the novel highly compact dual-polarized low-profile end-fire antenna is characterized in that, The first L-shaped metal sheet (61) and the second L-shaped metal sheet (62) form a dipole structure, and the horizontal polarization feeding structure provides two signals with a phase difference of 180° for the first L-shaped metal sheet (61) and the second L-shaped metal sheet (62); the third L-shaped metal sheet (63) and the fourth L-shaped metal sheet (64) form a dipole structure, and the horizontal polarization feeding structure provides two signals with a phase difference of 180° for the third L-shaped metal sheet (63) and the fourth L-shaped metal sheet (64); the two dipole structures jointly radiate horizontal polarization signals.
6. According to claim 1, the novel highly compact dual-polarized low-profile end-fire antenna is characterized in that, The vertical polarization feeding structure includes a first rectangular metal block (31), a second rectangular metal block (32), a third rectangular metal block (33), an irregular metal block (34), a first metal sheet (21), a first dielectric layer (11), a metal probe (7) and a third metal sheet (23); the first rectangular metal block (31), the second rectangular metal block (32), the third rectangular metal block (33) and the irregular metal block (34) are located on the upper surface of the first dielectric layer (11); the irregular metal block (34) includes a rectangular metal sheet (341) and a circular metal sheet (342); the irregular metal block (34) and the first rectangular metal block (31) and the second rectangular metal block (32) form a main feeder (3), which is arranged along the z-axis direction; the third metal block (33) is connected to the irregular rectangular metal block (34) and is placed along the negative x-axis direction to cancel the inductive reactance characteristic of the antenna impedance; the metal probe (7) is set to be cylindrical, the upper end is connected to the irregular metal block (34), the lower end is connected to the third metal sheet (23), and it penetrates through but is not connected to the first metal sheet (21).
7. According to claim 1, the novel highly compact dual-polarized low-profile end-fire antenna is characterized in that The horizontal polarization feeding structure includes, from top to bottom, a first metal sheet (21), a second dielectric layer (12), a second metal sheet (22), a third dielectric layer (13), and a third metal sheet (24). The second metal sheet (22) is arranged in a Γ shape and is located between the second dielectric layer (12) and the third dielectric layer (13). Two second isosceles right triangles (9) are cut off from the second metal sheet (22), and the end is an open-circuit structure, which is used to adjust the matching characteristics of horizontal polarization radiation.
8. The novel highly compact dual-polarized low-profile end-fire antenna according to claim 1, characterized in that, The first dielectric layer (11), the second dielectric layer (12), and the third dielectric layer (12) are made of Rogers RT5880 material, with a dielectric constant of 2.2 and a tangent loss of 0.0009.
9. A novel highly compact dual-polarized co-aperture end-fire antenna according to claim 1, characterized in that, The absolute bandwidth of the vertical polarization of the antenna is from 32.4 GHz to 34.4 GHz; the absolute bandwidth of the horizontal polarization of the antenna is from 25.6 GHz to 40.7 GHz; the profile height of the antenna is 0.178λ0.