Dual-polarized horn antenna with asymmetric radiation pattern

Abstract

A horn-type electromagnetic dual-polarized antenna with an asymmetric radiation pattern is provided. More specifically, the radiation pattern in the azimuth plane will have a wider beamwidth, while the radiation pattern in the elevation plane will have a narrower beamwidth, and the radiation patterns for horizontal polarization and vertical polarization are substantially identical.

Description

[0001] This application is a divisional application of the Chinese patent application filed on January 22, 2021, with application number 201980049201.1 and invention name “Dual-polarized horn antenna with asymmetric radiation pattern”. The international filing date of the parent application is October 9, 2019, the international application number is PCT / IB2019 / 001098, and the priority date is October 9, 2018. Technical Field

[0002] The present disclosure relates generally to electromagnetic antennas. More specifically, the present disclosure relates to horn-type electromagnetic antennas having an asymmetric or elliptical radiation pattern. More specifically, the radiation pattern in the azimuth plane has a wider beamwidth than the radiation pattern in the elevation plane, and vice versa, the radiation pattern in the elevation plane has a wider beamwidth than the radiation pattern in the azimuth plane. Background Art

[0003] A wireless communication network typically comprises a "master" node, which is referred to as an access point or base station or EnodeB (i.e., different wireless technologies use different terminology), which is serving multiple "side" nodes, which are referred to as client stations / terminals or CPE (Customer Premises Equipment) (also depending on the specific technology). Each node comprises a transmitter connected to a suitable antenna. The "master" node antenna is required to have a specific radiation pattern in order to cover a specific geographical area with the signal. In the case of terrestrial networks, the master node antenna is referred to as a sector antenna, since the master node antenna creates an angular sector in the azimuth plane that is part of a circular area surrounding the node.

[0004] Sector antennas are usually required to have angular coverage with a certain beamwidth, but in the elevation plane the beam should be much narrower.

[0005] Recently, horn antennas have become increasingly popular as sector antennas with symmetrical circular beam cross-sections and dual polarization (horizontal and vertical) antenna systems for simultaneously transmitting / receiving two orthogonally polarized signals. The main benefit of horn antennas is that the side lobes in their radiation pattern are greatly reduced or virtually eliminated, thus ensuring excellent field performance in terms of reduced interference when densely deployed.

[0006] For dual linear polarized (i.e., horizontal and vertical) horn antennas, achieving asymmetric radiation with equal shapes for both polarizations is a difficult task. In order to provide the same antenna performance or the same performance of the wireless network at every point within the sector coverage, it is necessary to have the same beam shape in the dual linear (horizontal and vertical) polarized antennas.

[0007] Urata H Et Al: "Multiple-Step Rectangular Horn with Two OrthogonalSectoral Tapers for Elliptical Beam", IEICE Transactions on Electronics, Institute of Electronics, Tokyo, JP, vol. E90C, no. 1, 1 February 2007 (2007-02-01), pages 217-223. XP001505146, ISSN: 0916-8524, DOI: 10.1093 / IETELE / E90-C.2.217, relates to a rectangular horn with two orthogonal multi-step tapered sections for obtaining dual-polarized elliptical beams. One of the sections has a stepped sectoral tapered configuration on the two side walls starting with a square waveguide feed, and then the other is a tapered section on the top and bottom walls toward the rectangular aperture.

[0008] S. Sanchez-Sevilleja Et Al: "Compact waveguide broadband dual-polarized horn array with a novel orthomode transducer in Ku-band for high-power SAR systems", Journal of Electromagnetic Waves and Applications, vol. 28, no. 4, 9 January 2014 (2014-01-09), pages 442-458, XP055672013, NL ISSN: 0920-5071, DOI: 10.1080 / 09205071.2013.872056, relates to a waveguide-based compact broadband and dual-polarized Ku-band synthetic aperture radar antenna with a high level of isolation between polarizations and high input power levels, the aperture radar antenna is designed for small platforms and unmanned aerial vehicles (UAVs). The antenna design consists of 8 dual-polarized horn antennas in an array configuration.

[0009] Esquius-Morote Marc Et Al: "Orthomode Transducer and Dual-Polarized Horn Antenna in Substrate Integrated Technology", IEEE Transactions on Antennas and Propagation, IEEE Service Center, Piscataway, NJ, US, vol. 62, no. 10, 1 October 2014 (2014-10-01), pages 4935-4944, XP011560550, ISSN: 0018-926X, DOI: 10.1109 / TAP.2014.2341697, relates to a dual-polarization system fully implemented in substrate integrated technology, the system comprising a device for orthogonal TE 10 Mode and Orthogonal TE 01 Mode planar excitation scheme for both the orthogonal module transducer (OMT) and the dual-polarized horn antenna.

[0010] US Patent No. 3,274,602 (Randall et al.) is directed to a variable beamwidth antenna, and more particularly to an antenna that can change its radiation pattern and reception pattern. Summary of the invention

[0011] The present disclosure describes a novel dual linear polarized horn antenna structure having an asymmetric radiation pattern equally for both horizontal and vertical polarizations.

[0012] A dual linear horizontally polarized and vertically polarized (H+V) horn antenna having an asymmetric radiation pattern equally for both polarizations is provided. The horn antenna shape is not rotationally symmetric along the longitudinal axis, and therefore its cross-section is oval or rectangular. When oriented horizontally with the smaller cross-sectional dimension, the radiation pattern in the azimuth plane will have a wider beamwidth (i.e., about 60 degrees), while the radiation pattern in the elevation plane will have a narrower beamwidth (i.e., about 15 to 20 degrees). The key feature is that, in accordance with the present disclosure, the cross-section in the azimuth plane has a width or physical dimension that is narrower at the mouth portion of the antenna than the width or physical dimension in the flared portion located between the mouth and the throat, such as Figure 2 and Figure 8 The throat may have a circular cross-sectional shape so that the antenna is located Figure 1 A circular waveguide is formed at the input port on the right side of . In some embodiments, the throat (A) can have different shapes or cross-sections, such as but not limited to square or rectangular shapes.

[0013] A horn-type electromagnetic antenna having multiple asymmetric radiation patterns, wherein a first radiation pattern in an azimuth plane has a wider beamwidth than a second radiation pattern in an elevation plane.

[0014] Preferably, in some embodiments, the first radiation pattern is in a range between about 30 degrees and about 90 degrees, and the second radiation pattern is in a range between about 15 degrees and about 30 degrees. More specifically, the radiation pattern in the azimuth plane will have a wider beam width (i.e., about 60 degrees in some embodiments), while the radiation pattern in the elevation plane will have a narrower beam width (i.e., about 15 degrees to about 20 degrees in some embodiments).

[0015] The horn-type electromagnetic antenna is a dual-polarized horn antenna. The antenna is a dual-linear horizontally polarized and vertically polarized horn antenna, and the first radiation pattern for horizontal polarization and the second radiation pattern for vertical polarization are substantially identical in shape.

[0016] A horn-type electromagnetic antenna generally includes a mouth, a throat, and at least one tapered portion disposed between the mouth and the throat, wherein the mouth has a width that is smaller than a width of the tapered portion. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a perspective view of an embodiment of an antenna showing the azimuth plane.

[0018] Figure 2 Shows Figure 1 The cross section of the antenna in the azimuth plane.

[0019] Figure 3 yes Figure 1 A perspective view of the antenna showing the elevation plane.

[0020] Figure 4 Shows Figure 3 The cross section of the antenna in the elevation plane.

[0021] Figure 5 yes Figure 1 Side view of the antenna.

[0022] Figure 6 Shows Figure 5 Cross section of the antenna in cutting plane AA.

[0023] Figure 7 is a perspective view of an embodiment of an antenna showing the azimuth plane.

[0024] Figure 8 Shows Figure 7 The cross section of the antenna in the azimuth plane.

[0025] Fig. 9 yes Figure 7 A perspective view of the antenna showing the elevation plane.

[0026] Fig.10 Shows Fig. 9 The cross section of the antenna in the elevation plane.

[0027] Fig.11 yes Figure 7 Side view of the antenna.

[0028] Fig.12 Shows Fig.11 A cross section of the antenna in the cutting plane A1-A1.

[0029] Fig.13 A three-dimensional illustration of the shape of the radiation pattern of the antenna of the present disclosure for horizontal polarization is shown.

[0030] Fig.14 Shows Fig.13 Top view of the 3D radiation pattern in the azimuthal plane.

[0031] Fig.15 Shows Fig.13 Side view of the 3D radiation pattern in the elevation plane.

[0032] Fig.16 The polar plot and the shape of the radiation pattern in the azimuth plane of the antenna of the present disclosure are shown for horizontal polarization.

[0033] Fig.17 A polar plot and the shape of the radiation pattern in the elevation plane of the antenna of the present disclosure for horizontal polarization are shown.

[0034] Fig.18 A three-dimensional illustration of the shape of the radiation pattern of the antenna of the present disclosure for vertical polarization is shown.

[0035] Fig.19 Shows Fig.18 Top view of the 3D radiation pattern in the azimuthal plane.

[0036] Fig. 20 Shows Fig.18 Side view of the 3D radiation pattern in the elevation plane.

[0037] Fig.21 A polar plot and the shape of the radiation pattern in the azimuth plane of the antenna of the present disclosure for vertical polarization are shown.

[0038] Fig. 22 A polar plot and the shape of the radiation pattern in the elevation plane of the antenna of the present disclosure for vertical polarization are shown.

[0039] In each figure, components or features that are common to more than one figure are indicated by the same reference numeral. DETAILED DESCRIPTION

[0040] Figure 1 is a perspective view of an embodiment of the disclosed antenna 100 showing an azimuth cut plane 110 passing through the center of the antenna 100. The antenna 100 has a mouth 104 and a throat 101.

[0041] exist Figure 2 A cross section of the antenna 100 through the azimuth plane 110 is shown in FIG. Figure 2 The rightmost portion 101 of is the throat section A of the antenna with a circular cross section as the circular waveguide input port of the antenna, and the throat section A has an internal width X or 115. Section 102 represents the flared region B, and the flared region B has an internal width Y or 120 at its left side. Section 103 is a tapered section C, and the tapered section C has an internal width Z or 125 at its left side, where section 103 continues to the mouth 104 or section D. In some embodiments, the mouth (D) of the antenna can be shaped into any commonly used shape such as a smooth flare, and the mouth (D) of the antenna can contain corrugations or chokes according to specific requirements.

[0042] In some embodiments, dimension 115 is 36.6 millimeters (mm), dimension 120 is 54.7 (mm), and dimension 125 is 48.3 (mm).

[0043] For any embodiment of the antenna disclosed herein, the width Z is always smaller than the width Y, thereby enabling the antenna to achieve very similar or identical radiation patterns for dual linear polarizations, especially horizontal polarization and vertical polarization. Fig.13 and Fig.18 , which shows a great degree of similarity in the radiation patterns for both horizontal and vertical polarizations, respectively. For any given value of Y, the azimuth radiation pattern becomes wider when Z is smaller. The width X is always smaller than the width Y. The width X is also always smaller than the width Z.

[0044] Figure 3 Antenna 100 is shown with elevation cut plane 130 passing through the center of antenna 100 and sighting axis 135 also passing through the center of antenna 100. In some embodiments, antenna 100 may be positioned from a Figure 3 The orientation shown is rotated 90 degrees clockwise or counterclockwise about axis 135 so that Figures 13 to 22The radiation pattern shown will be reversed. Or in other words, the radiation pattern in the azimuth plane after rotating the antenna will become the same as the radiation pattern in the elevation plane before the rotation, and the radiation pattern in the elevation plane after the rotation will become the same as the radiation pattern in the azimuth plane before the rotation. When rotating the antenna, the radiation pattern in the azimuth plane and the radiation pattern in the elevation plane will be reversed, but will still be essentially the same for both horizontal and vertical polarizations, while also maintaining an asymmetric or elliptical shape. Meaning that when rotated 90 degrees, the radiation pattern in azimuth will be narrower than the radiation pattern in the elevation plane, and therefore has an asymmetric or elliptical shape.

[0045] exist Figure 4 1 shows a cross section of the antenna 100 through the elevation plane 130. In this cross section, the segments 101 to 104 or in other words the segments A to D are shown, and the segments 101 to 104 correspond to the above Figure 2 The segments 101 to 104 are shown. In the elevation plane, the antenna is flared between the throat and the mouth, as shown in FIG. Figure 4 , Figure 5 , Fig.10 and Fig.11 shown.

[0046] Figure 5 Shows Figure 1 The side view of the antenna 100 is shown together with the Figure 2 and Figure 4 The segments 101 to 104 are shown. A cutting plane AA or axis 140 is shown passing through the center of the antenna 100. The cutting plane AA or axis 140 is in the azimuth plane.

[0047] Figure 6 Shows that from Figure 5 A cross section of antenna 100 is shown taken along axis 140 or AA. Segments 101 to 104 are shown along with dimensions Z, Y and X as described above.

[0048] Figure 7 is a perspective view of another embodiment of the disclosed antenna 200 showing an azimuthal cutting plane 210 passing through the center of the antenna 200. The antenna 200 has a mouth 205 and a throat 201.

[0049] exist Figure 8 A cross section of antenna 200 through azimuth plane 210 is shown in FIG. Figure 8The rightmost segment 201 of is the throat segment A of the antenna with a circular cross section as the circular waveguide input port of the antenna, and has an internal width X or 215. Segment 202 represents the outward expansion area B, and the outward expansion area B has an internal width Y or 220 on its left side. Segment 203 represents another area E, and the other area E also has an internal width Y or 220 on its left side. Segment 204 is a tapered segment C, and the tapered segment C has an internal width Z or 225 on its left side, where segment 204 continues to the mouth 205 or segment D.

[0050] In some embodiments, dimension 215 is 36.6 (mm), dimension 220 is 53.6 (mm), and dimension 225 is 45.1 (mm).

[0051] In some embodiments, making the inner section of the antenna in section E have a constant dimension Y can have a positive impact on the stability of the antenna parameters over the frequency range of the antenna. In other words, in some embodiments, the beam width and antenna gain do not change over the frequency range of the antenna. In addition, it can help to achieve equivalent radiation parameters for both polarizations of the antenna. When the wave has a sufficiently long waveguide section with a constant dimension (e.g., dimension Y in this embodiment), the wave traveling in the waveguide tends to stabilize and then travels through the waveguide without distortion.

[0052] In some embodiments, the internal width Y in sections B and E can be equal, larger, or smaller than each other, and generally the number of such sections can be greater than Figure 8 In some embodiments, the mouth (D) of the antenna can be shaped into any commonly used shape such as a smooth flare, and the mouth (D) of the antenna can include corrugations or chokes according to specific requirements.

[0053] As described above, the width Z is always smaller than the width Y, thereby enabling the antenna 200 to achieve very similar or identical radiation patterns for dual linear polarizations, especially horizontal polarization and vertical polarization. Fig.13 and Fig.18 , which shows a great degree of similarity in the radiation patterns for both horizontal and vertical polarizations, respectively. For any given value of Y, the azimuth radiation pattern becomes wider when Z is smaller. The width X is always smaller than the width Y. The width X is also always smaller than the width Z.

[0054] In some embodiments, Figure 2 and Figure 8 The dimension X shown, or in other words, the diameter of the feed waveguide determines the lower cutoff frequency. Any electromagnetic wave having a frequency lower than the lower cutoff frequency will not propagate through the waveguide. Increasing X also increases the lowest frequency that can propagate.

[0055] Fig. 9 Antenna 200 is shown with elevation cut plane 230 passing through the center of antenna 200 and sighting axis 235 also passing through the center of antenna 200. In some embodiments, antenna 200 may be positioned from a Fig. 9 The orientation shown is rotated 90 degrees clockwise or counterclockwise about axis 235 so that Figures 13 to 22 The radiation pattern shown will be reversed. Or in other words, the radiation pattern in the azimuth plane after rotating the antenna will become the same as the radiation pattern in the elevation plane before the rotation, and the radiation pattern in the elevation plane after the rotation will become the same as the radiation pattern in the azimuth plane before the rotation. When rotating the antenna, the radiation pattern in the azimuth plane and the radiation pattern in the elevation plane will be reversed, but will still be essentially the same for both horizontal and vertical polarizations, while also maintaining an asymmetric or elliptical shape. Meaning that when rotated 90 degrees, the radiation pattern in azimuth will be narrower than the radiation pattern in the elevation plane, and therefore has an asymmetric or elliptical shape.

[0056] exist Fig.10 2 shows a cross section of the antenna 200 through the elevation plane 230. In this cross section, the segments 201 to 205 or in other words the segments A, B, E, C and D are shown, and the segments 201 to 205 correspond to the above Fig. 9 Segments 201 to 205 are shown.

[0057] Fig.11 Shows Figure 7 The side view of the antenna 200 is shown together with the above Figure 8 and Fig.10 The segments 201 to 205 are shown. A cutting plane A1-A1 or axis 240 is shown passing through the center of the antenna 200. The cutting plane or axis 240 is in the azimuth plane.

[0058] Fig.12 Shows that from Fig.11 A cross section of antenna 200 is shown taken along axis 240 or A1-A1. Segments 201 to 205 are shown along with dimensions Z, Y, and X as described above. Figure 2 , Figure 6 , Figure 8 and Fig.12 As depicted, the width Z in segment C is less than the width Y of the tapered portion in segments B or E, or in other words, in the azimuthal plane, there is a flared portion in segment C preceding the tapered portion Y disposed between the throat X and the dimension Z in segment C.

[0059] Fig.13A three-dimensional illustration 300 of the shape of the radiation pattern of an antenna of the present disclosure for horizontal polarization on axes x, y and z is shown. An elevation plane 301 as defined by axes y and z is shown along with an azimuth plane 302 as defined by axes x and z.

[0060] Fig.14 Shows Fig.13 A top view of the shape of the three-dimensional radiation pattern 300 in the azimuth plane 302. In some embodiments, the beam width in the azimuth plane can be in the range of 30 to 90 degrees, 30 to 45 degrees, 30 to 60 degrees, or can be 30, 45, 60, or 90 degrees, as desired.

[0061] Fig.15 Shows Fig.13 A side view of the shape of the three-dimensional radiation pattern 300 in the elevation plane 301 .

[0062] Fig.16 A polar plot and shape of the radiation pattern 300 in the azimuth plane 302 of the antenna of the present disclosure for horizontal polarization is shown. The beam width 320 is measured from the guide lines 310 and 315 as shown. The guide lines 310 and 315 are measured at the point on the plot where the antenna gain is -6 dB. The angle between the two guide lines or the beam width 320 is 60 degrees.

[0063] Fig.17 A polar plot and shape of the radiation pattern 300 in the elevation plane 301 of the antenna of the present disclosure for horizontal polarization is shown. The beam width 335 is measured from the guide lines 325 and 330 as shown. The guide lines 325 and 330 are measured at the point on the plot where the antenna gain is -6 dB. The angle between the two guide lines or the beam width 335 is 20 degrees.

[0064] Fig.18 A three-dimensional illustration 400 of the shape of the radiation pattern of an antenna of the present disclosure for vertical polarization on axes x, y and z is shown. An elevation plane 401 as defined by axes y and z is shown along with an azimuth plane 402 as defined by axes x and z.

[0065] Fig.19 Shows Fig.18 A top view of the shape of the three-dimensional radiation pattern 400 in the azimuth plane 402. In some embodiments, the beam width in the azimuth plane can be in the range of 30 to 90 degrees, 30 to 45 degrees, 30 to 60 degrees, or can be 30, 45, 60, or 90 degrees as desired.

[0066] Fig. 20 Shows Fig.18A side view of the shape of the three-dimensional radiation pattern 400 in the elevation plane 401 .

[0067] Fig.21 A polar plot and shape of the radiation pattern 400 in the azimuth plane 402 of the antenna of the present disclosure for horizontal polarization is shown. The beam width 420 is measured from the guide lines 410 and 415 as shown. The guide lines 410 and 415 are measured at the point on the plot where the antenna gain is -6 dB. The angle between the two guide lines or the beam width 420 is 60 degrees.

[0068] Fig. 22 A polar plot and shape of the radiation pattern 400 in the elevation plane 401 of the antenna of the present disclosure for vertical polarization is shown. The beam width 435 is measured from guide lines 425 and guide lines 430 as shown. Guide lines 425 and 430 are measured at the point on the plot where the antenna gain is -6 dB. The angle between the two guide lines or beam width 435 is 20 degrees.

[0069] In some embodiments, the beamwidths do not differ from each other by more than 1 dB for both horizontal and vertical polarizations when measured according to the -6 dB mark. Fig.16 and Fig.21 As shown, the azimuth beamwidth for both horizontal and vertical polarizations is measured to be 60 degrees when measured from the -6dB mark. Fig.17 and Fig. 22 As shown, the elevation beamwidth is measured to be 20 degrees for both horizontal and vertical polarizations when measured according to the -6 dB mark. Therefore, although the radiation pattern is asymmetric or elliptical for comparing the azimuth beamwidth to the elevation beamwidth, the radiation pattern also has an equal or substantially equal beamwidth or beam characteristic when comparing the corresponding azimuth beamwidth to the corresponding elevation beamwidth for both horizontal and vertical polarizations.

[0070] It should also be noted that the terms "first", "second", "third", "upper", "lower", etc. may be used herein to modify various elements. Unless specifically stated, these modifiers do not imply a spatial, sequential, or hierarchical order to the modified elements.

[0071] Although the present disclosure has been described with reference to one or more exemplary embodiments, it will be appreciated by those skilled in the art that various changes may be made and elements thereof may be replaced with equivalents without departing from the scope of the present disclosure. In addition, many modifications may be made to adapt specific situations or materials to the teachings of the present disclosure without departing from the scope of the present disclosure. Therefore, it is intended that the present disclosure is not limited to the specific embodiments disclosed as the best mode contemplated, but that the present disclosure will include all embodiments falling within the scope of the appended claims.

Claims

1. A horn-type electromagnetic dual-polarization antenna, the horn-type electromagnetic dual-polarization antenna having linear horizontal polarization and vertical polarization, the horn-type electromagnetic dual-polarization antenna comprising a plurality of asymmetric radiation patterns, the plurality of asymmetric radiation patterns comprising: a first radiation pattern in an azimuth plane, the first radiation pattern in the azimuth plane having a wider beamwidth than the second radiation pattern in the elevation plane for horizontal polarization; and a third radiation pattern in the azimuth plane, the third radiation pattern in the azimuth plane having a wider beamwidth than the fourth radiation pattern in the elevation plane for vertical polarization; Wherein, the horn-type electromagnetic dual-polarization antenna further comprises a main body, the main body having a pair of side walls opposite to each other, the pair of side walls comprising a first part and a second part; a top wall and a bottom wall opposite to each other; throat and mouth; wherein the first portion has a first portion width, the mouth has a mouth width and the throat has a throat width; wherein the first portion of the pair of side walls tapers linearly from the throat width to the first portion width relative to the azimuthal plane; wherein the second portion of the pair of side walls tapers linearly from a width of the first portion to a width of the mouth relative to the azimuth plane; The mouth width is smaller than the first portion width, and the throat width is smaller than the mouth width.

2. The horn-type electromagnetic dual-polarization antenna according to claim 1, wherein: The plurality of asymmetric radiation patterns are elliptical radiation patterns.

3. The horn-type electromagnetic dual-polarization antenna according to claim 1, wherein: The first radiation pattern and the third radiation pattern have a beamwidth in a range between 30 degrees and 90 degrees when measured at 6 dB down from a maximum antenna gain, and the second radiation pattern and the fourth radiation pattern have a beamwidth in a range between 15 degrees and 30 degrees.

4. The horn-type electromagnetic dual-polarization antenna according to claim 1, wherein: The first radiation pattern and the third radiation pattern are identical for both the horizontal polarization and the vertical polarization, and the second radiation pattern and the fourth radiation pattern are identical for both the horizontal polarization and the vertical polarization.

5. The horn-type electromagnetic dual-polarization antenna according to claim 1, further comprising: an aiming axis extending through the center of the mouth and through the center of the throat; wherein the horn-type electromagnetic dual-polarization antenna is rotated 90 degrees about the aiming axis so that the first radiation pattern in the azimuth plane for the horizontal polarization is a narrow beam width compared to the second radiation pattern in the elevation plane, and the third radiation pattern in the azimuth plane for the vertical polarization is a narrow beam width compared to the fourth radiation pattern in the elevation plane.

6. The horn-type electromagnetic dual-polarization antenna according to claim 1, wherein: The horn-type electromagnetic dual-polarization antenna also includes a mouth height and a throat height; wherein the top wall and the bottom wall taper linearly from the throat height to the mouth height relative to the elevation plane; and Wherein, the throat height is smaller than the mouth height.

7. A horn-shaped electromagnetic dual-polarization antenna, the horn-shaped electromagnetic dual-polarization antenna having linear horizontal polarization and vertical polarization, the horn-shaped electromagnetic dual-polarization antenna comprising a plurality of asymmetric radiation patterns, the plurality of asymmetric radiation patterns comprising: a first radiation pattern in an azimuth plane, the first radiation pattern in the azimuth plane having a narrower beamwidth than the second radiation pattern in the elevation plane for horizontal polarization; and a third radiation pattern in the azimuth plane, the third radiation pattern in the azimuth plane having a narrower beamwidth than the fourth radiation pattern in the elevation plane for vertical polarization; Wherein, the horn-type electromagnetic dual-polarization antenna further comprises a main body, the main body having a pair of side walls opposite to each other, the pair of side walls comprising a first part and a second part; a top wall and a bottom wall opposite to each other; throat and mouth; wherein the first portion has a first portion width, the mouth has a mouth width and the throat has a throat width; wherein the first portion of the pair of side walls tapers linearly from the throat width to the first portion width relative to the elevation plane; wherein the second portion of the pair of side walls tapers linearly relative to the elevation plane from a width of the first portion to a width of the mouth; The mouth width is smaller than the first portion width, and the throat width is smaller than the mouth width.

8. The horn-type electromagnetic dual-polarization antenna according to claim 7, wherein: The plurality of asymmetric radiation patterns are elliptical radiation patterns.

9. The horn-type electromagnetic dual-polarization antenna according to claim 7, wherein: The first radiation pattern and the third radiation pattern are within a range between 15 degrees and 30 degrees, and the second radiation pattern and the fourth radiation pattern are within a range between 30 degrees and 90 degrees.

10. The horn-type electromagnetic dual-polarization antenna according to claim 7, wherein: The first radiation pattern and the third radiation pattern are identical for both the horizontal polarization and the vertical polarization, and the second radiation pattern and the fourth radiation pattern are identical for both the horizontal polarization and the vertical polarization.

11. The horn-type electromagnetic dual-polarization antenna according to claim 7, wherein: The horn-type electromagnetic dual-polarization antenna also includes a mouth height and a throat height; wherein the top wall and the bottom wall taper linearly relative to the azimuthal plane from the throat height to the mouth height; and Wherein, the throat height is smaller than the mouth height.

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