horn antenna

Abstract

The application discloses a horn antenna, which comprises a double-ridge horn antenna body, a metal plate and a fixing piece, wherein the double-ridge horn antenna body is in a mirror-symmetrical structure, the metal plate is arranged in the opening direction of the double-ridge horn antenna body and the plate surface of the metal plate faces the opening of the double-ridge horn antenna body, and the fixing piece connects the double-ridge horn antenna body and the metal plate. The horn antenna provided by the application can improve the beam width of the horn antenna and improve the performance of the antenna.

Description

Technical Field

[0001] This invention relates to the field of antenna technology, and in particular to a horn antenna. Background Technology

[0002] In jamming systems, horn antennas can be used to provide jamming signals to interfere with target signals. However, typical horn antennas have narrow beams, large blind zones, and poor jamming effects.

[0003] In the existing technology, the beamwidth of a horn antenna at 12 GHz H-plane pattern is only ±15°, which is relatively narrow and has a large interference blind zone. Summary of the Invention

[0004] In view of the above problems, the purpose of this invention is to provide a horn antenna, thereby improving the beamwidth of the horn antenna and enhancing its performance.

[0005] According to one aspect of the present invention, a horn antenna is provided, comprising:

[0006] The body of the double-ridged horn antenna has a mirror-symmetrical structure;

[0007] A metal plate is disposed in the opening direction of the double-ridged horn antenna body, and the plate surface of the metal plate faces the opening of the double-ridged horn antenna body;

[0008] A fastener connects the double-ridged horn antenna body and the metal plate.

[0009] Optionally, the metal plate is at least one of rectangular, I-shaped, and cross-shaped.

[0010] Optionally, the distance from the metal plate to the body of the double-ridged horn antenna is 0.5 to 10 wavelengths.

[0011] Optionally, the dual-ridge horn antenna body includes:

[0012] Back cavity;

[0013] A double-ridged horn includes two ridge plates and two metal walls. The surfaces of the two metal walls are angled to form a horn opening. The two ridge plates are respectively connected to the two metal walls, and the ridge lines in each ridge plate are arranged opposite each other.

[0014] Optionally, the two ridge plates have the same shape, each including a straight edge and a curved edge connected to each other, the straight edge being in contact with the metal wall, and the straight edge coinciding with the ridge line in the ridge plate.

[0015] Optionally, the curved edges of both ridge plates are exponential curved edges.

[0016] Optionally, both metal walls are fan-shaped structures, including a bottom edge, a top edge, and a side edge connecting the bottom edge and the top edge. The side edge includes a straight segment and an arc segment. The straight segment connects to the bottom edge, the arc segment connects to the top edge, and the bottom edge connects to the back cavity.

[0017] Optionally, the back cavity has a concave structure, including a bottom and two opposing vertical sidewalls protruding from the bottom. The two metal walls are obliquely connected to the two sidewalls respectively, wherein the two ridge plates are both connected to the bottom of the back cavity.

[0018] Optionally, there are two fasteners, each including a first part and a second part. The first part includes a first groove, and the metal wall extends into the first groove of the first part and engages with it. The second part includes a second groove, and the metal plate engages with the second groove of the second part.

[0019] Optionally, the extension length of the metal wall is less than the extension length of the ridge plate.

[0020] The horn antenna provided by this invention has a metal plate disposed in the opening direction of the double-ridged horn antenna body, which can improve the beamwidth of the horn antenna and improve antenna performance. Attached Figure Description

[0021] The above and other objects, features and advantages of the present invention will become more apparent from the following description of embodiments of the invention with reference to the accompanying drawings, in which:

[0022] Figure 1 A three-dimensional structural schematic diagram of a horn antenna according to an embodiment of the present invention is shown;

[0023] Figure 2 A front view of a horn antenna according to an embodiment of the present invention is shown;

[0024] Figure 3A , Figure 3B , Figure 3C A schematic diagram of the structure of a metal plate for a horn antenna according to an embodiment of the present invention is shown;

[0025] Figure 4 A three-dimensional structural schematic diagram of the double-ridged horn antenna body according to an embodiment of the present invention is shown;

[0026] Figure 5 A side view of the body of a double-ridged horn antenna according to an embodiment of the present invention is shown;

[0027] Figure 6 , Figure 7 , Figure 8The E-plane radiation patterns of the horn antenna at three frequency points of 4 GHz, 12 GHz, and 18 GHz according to embodiments of the present invention are shown respectively.

[0028] Figure 9 The voltage standing wave ratio (VSWR) of a horn antenna according to an embodiment of the present invention is shown in the range of 2 GHz to 18 GHz. Detailed Implementation

[0029] Various embodiments of the invention will now be described in more detail with reference to the accompanying drawings. In the various drawings, the same elements are indicated by the same or similar reference numerals. For clarity, the various parts in the drawings are not drawn to scale.

[0030] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples.

[0031] Figure 1 A three-dimensional structural schematic diagram of a horn antenna according to an embodiment of the present invention is shown. Figure 2 A front view of a horn antenna according to an embodiment of the present invention is shown.

[0032] like Figure 1 and Figure 2 As shown, the horn antenna 100 of this embodiment includes a back cavity 110, a double-ridged horn 120, a fixing member 130, and a metal plate 140, so as to... Figure 1 For directional reference, the top indicates the direction of the antenna opening. The overall structure is mirror-symmetrical.

[0033] The back cavity 110 has a concave structure, including a bottom and two opposing sidewalls that bulge out from the bottom.

[0034] The dual-ridged horn 120 includes a ridge plate 121 and a metal wall 122. Both the ridge plate 121 and the metal wall 122 are two pieces, respectively connected to the two side walls of the back cavity 110. The ridge plate 121 is also connected to the bottom of the back cavity 110, and the metal wall 122 is connected to the top of the side wall of the back cavity 110. The back cavity 110 and the dual-ridged horn 120 constitute the dual-ridged horn antenna body, realizing the basic design of the dual-ridged horn antenna. This dual-ridged horn antenna body has a mirror-symmetrical structure.

[0035] Two metal walls 122 are angled together to form a horn opening, determining the orientation of the horn antenna 100. A ridge plate 121 is perpendicularly connected to the corresponding metal wall 122. Both ridge plates 121 have identical shapes, including interconnected straight and curved edges. The straight edge contacts the metal wall 122. From a viewing angle parallel to the surface of the ridge plate 121, the straight edge coincides with the ridge line of the ridge plate 121. The curved edge faces the curved edge of the other ridge plate 121. The curved edge is exponentially curved, enabling wideband characteristics. The metal wall 122 can be made of aluminum plate or aluminum alloy, etc.

[0036] There are two fasteners 130, which are generally waist-shaped. Each includes a first part 1301 and a second part 1302 connected relative to the bending point. The first part 1301 is parallel to the metal wall 122, and the second part 1302 is parallel to the opening of the horn antenna 100. The first part 1301 is fixedly connected to the metal wall 122 by screws 131, thereby securing the fasteners 130 to the double-ridged horn antenna body and facilitating operation. The fasteners 130 are made of fiberglass or similar materials.

[0037] The first part 1301 of the fastener 130 is provided with a first groove extending parallel to the first part 1301. The first groove matches the metal wall 122. The width of the groove is the same as the thickness of the metal wall 122. When installing the fastener 130, the metal wall 130 can be inserted into the first groove of the first part 1301 to fit together, thereby locking and connecting the fastener 130 and the metal wall 122. Then, it can be fixed by screws 131. This can ensure the fixing performance of the fastener 130 and the double-ridged horn antenna body, thereby ensuring the structural stability of the horn antenna 100.

[0038] The outer perimeter of the connecting portion of the first part 1301 and the second part 1302 of the fastener 130 is a broken line segment, and the inner perimeter is a curved segment. The curved segment of the inner perimeter is concave, which matches the outward bending of the top of the ridge plate 121, thereby improving spatial impedance matching and antenna performance.

[0039] The metal plate 140 is connected to the fixing member 130 and is positioned above the horn antenna 100, i.e., in the direction the antenna opening faces, and its surface faces the opening of the double-ridged horn antenna body. In an optional embodiment, the metal plate 140 is perpendicular to the opening of the double-ridged horn antenna body. The long axis of the metal plate 140 is parallel to the angular direction of the horn opening of the horn antenna 100. Figure 2 For reference, the long axis of the metal plate 140 is parallel to the left-right direction of the horn antenna 100.

[0040] The end of the second part 1302 of the fastener 130 (with) Figure 2 For reference, a second groove is provided at the top. The width and depth of the second groove match the width and thickness of the metal plate 140, so that the metal plate 140 and the second groove of the second part 1302 can fit together and be engaged, for fixing the metal plate 140.

[0041] The distance between the metal plate 140 and the double-ridged horn antenna body is H, where 0.5λ≤h≤10λ, and λ is the center wavelength of the horn antenna 100 in this embodiment. The metal plate 140 can be made of aluminum or aluminum alloy, etc.

[0042] Figure 3A , Figure 3B , Figure 3C A schematic diagram of the structure of a metal plate for a horn antenna according to an embodiment of the present invention is shown.

[0043] like Figure 3A , Figure 3B , Figure 3C As shown, the metal plate 140 of the horn antenna 100 in this embodiment of the invention can be designed as any one of a regular rectangle, an I-shape, and a cross shape. With the long axis direction of the metal plate 140 as the reference positive direction, the I-shape is a regular I-shape, and the protrusions at both ends are located outside the fixing members 130 in the reference positive direction. The side protrusion of the middle part of the cross shape relative to the reference positive direction is located between the two fixing members 130 in the reference positive direction.

[0044] Figure 4 A three-dimensional structural schematic diagram of the double-ridged horn antenna body according to an embodiment of the present invention is shown. Figure 5 A side view of the body of a double-ridged horn antenna according to an embodiment of the present invention is shown.

[0045] like Figure 4 and Figure 5 As shown, and referring to the above description in this specification, the double-ridged horn antenna body of the horn antenna in this embodiment of the invention is composed of a back cavity 110 and a double-ridged horn 120.

[0046] The back cavity 110 has a concave structure with the opening facing upward. It includes a bottom and two opposing vertical sidewalls protruding from the bottom. The space between the two opposing sidewalls is the concave cavity. The two ridges of the double-ridge horn 120 are respectively connected to the two sidewalls, and the two ridge plates 121 are both connected to the bottom of the back cavity 110.

[0047] The bottom edge of the metal wall 122 of the double-ridged horn 120 is connected to the top edge of the side wall. The bottom edges of the two metal walls 122 are parallel, and the top edges are also parallel. With the bottom edge as the fulcrum, they extend outward at a certain angle to form a horn opening. The opening direction is determined to be upward, and the angle is outward. The intersection lines of the two metal walls 122 with each horizontal plane are parallel.

[0048] The ridge plate 121 of the dual-ridge horn 120 is perpendicularly connected to the metal wall, including a straight edge connected to the metal wall 122 and a curved edge facing the other metal wall 122. This curved edge is an exponential curved edge, which can realize the wideband characteristics of the antenna. The bottom end of the ridge plate 121 is connected to the bottom of the cavity of the back cavity 110, and can be used to receive the feed information transmitted by the back cavity. The top end extends beyond the top end of the metal wall 122. That is, in the direction in which the opening of the horn antenna 100 faces, the extension distance of the metal wall 122 is less than the extension distance of the ridge plate 121. In the overall structure of the dual-ridge horn 120 in this embodiment, the extension length of the metal wall 122 is also less than the extension length of the ridge plate 121. The two ridge plates 121 are not directly connected.

[0049] The metal wall 122 has a fan-shaped structure. The sides from the bottom to the top include connecting straight and curved segments. The straight segment connects to the bottom edge, and the curved segment connects to the top edge. The dimensions gradually increase from the bottom edge to the top edge, first gradually increasing and then gradually decreasing after the curved segment, exhibiting an outward radiating effect. The top edge is a straight segment, perpendicular to the opening direction, corresponding to the groove of the first part 1301 of the fastener 130. This allows the groove of the first part 1301 of the fastener 130 to be aligned in a straight line during manufacturing to match the top edge of the metal wall 122, achieving a stable mortise and tenon connection structure with a simple process.

[0050] Figure 6 , Figure 7 , Figure 8 The E-plane radiation patterns of the horn antenna at three frequency points of 4 GHz, 12 GHz, and 18 GHz according to embodiments of the present invention are shown respectively.

[0051] As shown in the figure, the horn antenna 100 of this embodiment has 3dB beamwidths of 141°, 80° and 60° at three frequency points of 4GHz, 12GHz and 18GHz, respectively. The beamwidth is significantly improved compared to the ±15° beamwidth of the prior art.

[0052] Figure 9 The voltage standing wave ratio (VSWR) of a horn antenna according to an embodiment of the present invention is shown in the range of 2 GHz to 18 GHz.

[0053] As shown in the figure, the horn antenna 100 of this embodiment of the invention has a voltage standing wave ratio of no more than 2 in the range of 2GHz to 18GHz, and has good broadband characteristics.

[0054] The horn antenna of the present invention has a metal plate disposed in the opening direction of the antenna body, which can improve the beamwidth of the antenna, improve the broadband characteristics of the antenna, and improve the interference effect of the jamming system using the horn antenna of the present invention.

[0055] The metal plate is an add-on design that does not change the structure of the double-ridged horn antenna and improves processing convenience.

[0056] As described above, these embodiments of the present invention do not exhaustively cover all details, nor do they limit the invention to the specific embodiments described. Clearly, many modifications and variations can be made based on the above description. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to effectively utilize the invention and its modifications. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A double-ridged horn antenna, characterized in that, include: The body of the double-ridged horn antenna has a mirror-symmetrical structure; A metal plate is disposed in the opening direction of the double-ridged horn antenna body, and the plate surface of the metal plate faces the opening of the double-ridged horn antenna body; The fastener connects the double-ridged horn antenna body and the metal plate; Back cavity; A double-ridged horn includes two ridge plates and two metal walls. The surfaces of the two metal walls are angled to form a horn opening. The two ridge plates are respectively connected to the two metal walls, and the ridge lines in each ridge plate are aligned with each other. The fastener consists of two parts, each comprising a first part and a second part. The first part includes a first groove, into which the metal wall extends and engages with the first part. The second part includes a second groove, into which the metal plate engages with the second groove of the second part. The outer perimeter of the connecting portion between the first and second parts of the fastener is a broken line segment, and the inner perimeter is a curved segment. The curved segment of the inner perimeter is concave, matching the outward bending of the top of the ridge plate to improve spatial impedance matching. The distance between the metal plate and the body of the double-ridged horn antenna is 0.5 to 10 wavelengths to improve the beamwidth of the antenna.

2. The double-ridged horn antenna according to claim 1, characterized in that, The metal plate is at least one of rectangular, I-shaped, and cross-shaped.

3. The double-ridged horn antenna according to claim 1, characterized in that, The two ridge plates have the same shape, each including a straight edge and a curved edge that are connected to each other. The straight edge is in contact with the metal wall and coincides with the ridge line in the ridge plate.

4. The double-ridged horn antenna according to claim 3, characterized in that, Both of the ridge plates have exponential curvature.

5. The double-ridged horn antenna according to claim 1, characterized in that, Both metal walls are fan-shaped structures, including a bottom edge, a top edge, and a side edge connecting the bottom edge and the top edge. The side edge includes a straight segment and an arc segment. The straight segment connects to the bottom edge, the arc segment connects to the top edge, and the bottom edge connects to the back cavity.

6. The double-ridged horn antenna according to claim 1, characterized in that, The back cavity has a concave structure, including a bottom and two opposing vertical sidewalls protruding from the bottom. The two metal walls are respectively inclinedly connected to the two sidewalls, wherein the two ridge plates are both connected to the bottom of the back cavity.

7. The double-ridged horn antenna according to claim 1, characterized in that, The fastener consists of two parts, each comprising a first part and a second part. The first part includes a first groove, and the metal wall extends into the groove of the first part and engages with it. The second part includes a second groove, and the metal plate engages with the second groove of the second part.

8. The double-ridged horn antenna according to claim 1, characterized in that, The extension length of the metal wall is less than the extension length of the spine plate.

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