Ultra-wideband dual-polarized horn antenna

Abstract

The application provides an ultra-wideband dual-polarization horn antenna, which comprises a waveguide reflection cavity, a coaxial feeding structure and four special-shaped horn ridges; the bottom ends of the four special-shaped horn ridges are located in the waveguide reflection cavity, and the outer sides of the bottom ends of the special-shaped horn ridges are connected with the inner side walls of the waveguide reflection cavity; the four special-shaped horn ridges are symmetrically arranged, and a pair of oppositely arranged special-shaped horn ridges are connected and fed through the coaxial feeding structure; the ridge structure of the special-shaped horn ridges is composed of multiple curved lines, and each curved line is modulated by a cubic function. The antenna of the application modulates the ridge curved lines by segmenting and using cubic functions, so that each curved line has independent adjustment freedom, effectively solves the problems of main lobe splitting and gain reduction in the ultra-wideband working frequency band, and realizes good ultra-wideband impedance matching and stable radiation characteristics.

Description

Technical Field

[0001] This invention belongs to the field of broadband antenna technology, specifically relating to an ultra-wideband dual-polarized horn antenna. Background Technology

[0002] With the rapid development of the electronic information age, devices now have increasingly higher requirements for data transmission rates and signal coverage, and ultra-wideband (UWB) has become a common indicator of antenna technology.

[0003] Horn antennas are widely used in various fields due to their advantages such as high gain, good directivity, high cross-polarization, and simple structure. However, as the operating frequency band gradually increases, matching horn antennas becomes more difficult, and traditional structures gradually exhibit problems such as main lobe splitting and gain reduction at high frequencies. To ensure a wide operating bandwidth while minimizing high-frequency pattern splitting, the antenna's form and structure need to be optimized and improved. Summary of the Invention

[0004] The purpose of this invention is to provide an ultra-wideband dual-polarized horn antenna to optimize the impedance matching of the horn antenna and suppress the main lobe splitting of the radiation pattern within the ultra-wideband operating frequency band.

[0005] To solve the above-mentioned technical problems, the present invention provides an ultra-wideband dual-polarized horn antenna, characterized in that it includes a waveguide reflecting cavity, a coaxial feeding structure, and four irregularly shaped horn ridges; The bottom ends of the four irregular horn ridges are located inside the waveguide reflection cavity, and the outer side of the bottom end of the irregular horn ridges is connected to the inner wall of the waveguide reflection cavity. The four irregular horn ridges are evenly and symmetrically arranged, and a pair of irregular horn ridges arranged opposite each other are connected and fed through the coaxial feeding structure; the ridge structure of the irregular horn ridge is composed of multiple curves, and each curve is modulated by a cubic function.

[0006] According to the above scheme, the ridge structure of the irregular horn ridge is composed of a first curve, a second curve, and a third curve connected end to end, and each curve is modulated by the same cubic function.

[0007] According to the above scheme, the cubic function is expressed as:

[0008]

[0009] in , , , , These are the coordinates of the four control points for each curve segment.

[0010] According to the above scheme, the control points of the first segment curve are: A(0mm,0mm), B(10mm,2mm), C(20mm,5mm), D(25mm,8mm); The control points for the second segment of the curve are: D(25mm,8mm), E(30mm,10mm), F(35mm,12mm), G(40mm,14mm); The control points of the third curve are: G(40mm, 14mm), H(42mm, 13mm), I(44mm, 11mm), J(45mm, 9mm).

[0011] According to the above scheme, the third curve segment is provided with multiple comb-shaped grooves.

[0012] According to the above scheme, the cross-section of the waveguide reflecting cavity is square, and the bottom outer end of the irregular horn ridge is connected to the center of the inner wall of the waveguide reflecting cavity.

[0013] According to the above scheme, the operating frequency band of the ultra-wideband dual-polarized horn antenna is 5GHz to 45GHz.

[0014] According to the above scheme, the overall size of the ultra-wideband dual-polarized horn antenna is 45mm×45mm×38mm.

[0015] The present invention also provides a broadband wireless communication device, including the ultra-wideband dual-polarized horn antenna described above.

[0016] The present invention also provides a ship including the broadband wireless communication device described above.

[0017] Beneficial effects The antenna of this invention uses multiple curves to form an irregular horn ridge, and each curve is independently modulated by a cubic function, so that each segment of the ridge curve has an independent degree of adjustment freedom. Thus, while maintaining structural continuity, it can flexibly optimize the impedance matching and radiation characteristics of different frequency bands, effectively suppress the main lobe splitting of the radiation pattern in the ultra-wideband operating frequency band and ensure the stability of antenna gain. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of an ultra-wideband dual-polarized horn antenna according to an embodiment of the present invention; Figure 2 yes Figure 1 The front view; Figure 3 yes Figure 1 Top view; Figure 4This is a simulation diagram of the standing wave ratio of an ultra-wideband dual-polarized horn antenna according to an embodiment of the present invention; Figure 5 This is a simulation diagram of the isolation between the two polarization ports of an ultra-wideband dual-polarized horn antenna according to an embodiment of the present invention; Figure 6 This is a simulation diagram of the radiation pattern of an ultra-wideband dual-polarized horn antenna according to an embodiment of the present invention. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0020] like Figures 1-3 As shown, this embodiment provides a comb-shaped ultrawideband dual-polarized horn antenna with piecewise cubic function modulation. The structure includes four irregularly shaped horn ridges, a waveguide reflector cavity, and a coaxial feed structure.

[0021] The bottom ends of the four irregularly shaped horn ridges are located within the waveguide reflecting cavity, and the outer sides of the bottom ends of the irregularly shaped horn ridges are connected to the inner wall of the waveguide reflecting cavity. The four irregularly shaped horn ridges are evenly and symmetrically arranged. The cross-section of the waveguide reflecting cavity is square, and the outer side of the bottom end of each irregularly shaped horn ridge is connected to the center of the inner wall of the waveguide reflecting cavity. A pair of irregularly shaped horn ridges arranged opposite each other are connected and fed through the coaxial feeding structure to form a linearly polarized radiation; the two sets of irregularly shaped horn ridges together constitute a dual-polarized radiation state.

[0022] The ridge structure of the irregular horn-shaped ridge is composed of multiple curve segments, each of which is modulated by a cubic function. In this embodiment, the ridge structure of the irregular horn-shaped ridge is preferably composed of a first curve segment, a second curve segment, and a third curve segment connected end to end, with each curve segment modulated by the same form of cubic function. The cubic function is expressed as:

[0023]

[0024] in , , , , These are the coordinates of four control points for each curve segment. By adjusting these four control points, a wide range of curve adjustments can be achieved to improve the matching characteristics of the horn ridge and optimize the antenna pattern.

[0025] To ensure the curve is continuous at both ends and has a reasonable structure, the following typical control point parameters can be used in this embodiment: The first curve control points are: point A (0mm, 0mm) is the starting point of the curve; point B (10mm, 2mm) is the first curve control point 1; point C (20mm, 5mm) is the first curve control point 2; and point D (25mm, 8mm) is the ending point of the first curve, which also serves as the starting point of the second curve.

[0026] The control points for the second curve segment are as follows: point D (25mm, 8mm) is the starting point of the curve; point E (30mm, 10mm) is control point 1 of the second curve segment; point F (35mm, 12mm) is control point 2 of the second curve segment; and point G (40mm, 14mm) is the ending point of the second curve segment, which also serves as the starting point of the third curve segment.

[0027] The third curve control points are as follows: point G (40mm, 14mm) is the starting point of the curve; point H (42mm, 13mm) is the control point 1 of the third curve segment, corresponding to the starting area of ​​the comb-shaped groove; point I (44mm, 11mm) is the control point 2 of the third curve segment, corresponding to the ending area of ​​the comb-shaped groove; and point J (45mm, 9mm) is the ending point of the curve, aligned with the end of the trumpet ridge.

[0028] Furthermore, multiple comb-shaped grooves are cut into the third curve to extend the current transmission path, improve the low-frequency matching state, and help reduce the antenna size.

[0029] The antenna in this embodiment covers the 5GHz~45GHz frequency band, and the overall dimensions of the horn are 45mm×45mm×38mm. Simulation results in the full-wave simulation software are as follows... Figures 4-6 As shown, the standing wave ratio is less than 2.5 in the operating frequency band; the isolation between the two polarization ports is greater than 40dB; the structures of the two polarization directions are basically the same, and the radiation patterns are similar. Taking the horizontal polarization radiation pattern as an example, the E-plane and H-plane radiation patterns are smooth, the beam does not split, and the high-frequency gain does not decrease, resulting in excellent radiation performance.

[0030] The aforementioned antenna can be applied to broadband wireless communication devices, such as communication terminals integrated on ships, as an ultra-wideband dual-polarized transceiver antenna.

[0031] It should be noted that, depending on the implementation needs, the various steps / components described in this application can be broken down into more steps / components, or two or more steps / components or parts of the operation of steps / components can be combined into new steps / components to achieve the purpose of this invention.

[0032] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An ultra-wideband dual-polarized horn antenna, characterized in that, It includes a waveguide reflecting cavity, a coaxial feeding structure, and four irregularly shaped horn ridges; The bottom ends of the four irregular horn ridges are located inside the waveguide reflection cavity, and the outer side of the bottom end of the irregular horn ridges is connected to the inner wall of the waveguide reflection cavity. The four irregular horn ridges are evenly and symmetrically arranged, and a pair of irregular horn ridges arranged opposite each other are connected and fed through the coaxial feeding structure; the ridge structure of the irregular horn ridge is composed of multiple curves, and each curve is modulated by a cubic function.

2. The ultra-wideband dual-polarized horn antenna according to claim 1, characterized in that, The ridge structure of the irregular horn ridge is composed of a first curve, a second curve, and a third curve connected end to end, and each curve is modulated by the same cubic function.

3. The ultra-wideband dual-polarized horn antenna according to claim 2, characterized in that, The cubic function is expressed as: in , , , , These are the coordinates of the four control points for each curve segment.

4. The ultra-wideband dual-polarized horn antenna according to claim 3, characterized in that, The control points for the first segment of the curve are: A(0mm,0mm), B(10mm,2mm), C(20mm,5mm), D(25mm,8mm); The control points for the second segment of the curve are: D(25mm,8mm), E(30mm,10mm), F(35mm,12mm), G(40mm,14mm); The control points of the third curve are: G(40mm, 14mm), H(42mm, 13mm), I(44mm, 11mm), J(45mm, 9mm).

5. The ultra-wideband dual-polarized horn antenna according to claim 2, characterized in that, The third curve segment is provided with multiple comb-shaped grooves.

6. The ultra-wideband dual-polarized horn antenna according to claim 2, characterized in that, The cross-section of the waveguide reflector cavity is square, and the bottom outer end of the irregular horn ridge is connected to the center of the inner wall of the waveguide reflector cavity.

7. The ultra-wideband dual-polarized horn antenna according to claim 1, characterized in that, The ultra-wideband dual-polarized horn antenna operates in the frequency band of 5GHz to 45GHz.

8. The ultra-wideband dual-polarized horn antenna according to claim 1, characterized in that, The overall dimensions of the ultra-wideband dual-polarized horn antenna are 45mm × 45mm × 38mm.

9. A broadband wireless communication device, characterized in that, Includes the ultra-wideband dual-polarized horn antenna as described in any one of claims 1 to 8.

10. A ship, characterized in that, Includes the broadband wireless communication device as described in claim 9.

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