An ultra-wideband dual-polarization conformal antenna array

Abstract

An ultra-wideband dual-polarization conformal antenna array comprises: a cylindrical metal mounting platform, a plurality of dielectric walls spaced apart on the metal cylindrical surface of the mounting platform, a horizontally polarized ultra-wideband antenna array mounted on the dielectric wall and having its inner surface closely fitted to the outer surface of the dielectric wall, a vertically polarized ultra-wideband antenna array mounted on the horizontally polarized ultra-wideband antenna array and having its inner surface closely fitted to the outer surface of the horizontally polarized ultra-wideband antenna array, the horizontally polarized ultra-wideband antenna array and the vertically polarized ultra-wideband antenna array generating mutually perpendicular polarizations. The invention has a simple and reliable structure, and simultaneously realizes ultra-wideband, low profile, conformal, dual-polarization, high gain and other performances.

Description

Technical Field

[0001] The present invention relates to the field of antennas, and in particular to an ultra-wideband dual-polarization conformal antenna array. Background Art

[0002] Ultra-wideband technology is widely used in the field of communications. Ultra-wideband antennas have bandwidth characteristics that are unmatched by other antennas, while dual-polarization antennas can transmit and receive fully polarized signals. They can be used in communication base stations to achieve full airspace coverage. Existing ultra-wideband dual-polarization antennas are mostly formed by vertically cross-installed microstrip, horn, and vibrator antennas. Microstrip antennas have become a development trend due to their light weight and easy processing, but realizing dual polarization on a planar structure will bring about disadvantages such as narrow bandwidth, poor cross-polarization, and high profile, and cannot conform to the carrier. Although dual-polarization horn antennas and vibrator antennas can guarantee antenna gain performance, their inherent shape makes it difficult to achieve ultra-wideband and miniaturization. Summary of the invention

[0003] The purpose of the present invention is to provide an ultra-wideband dual-polarization conformal antenna array with a simple and reliable structure, while achieving ultra-wideband, low-profile, conformal, dual-polarization, high-gain and other performances.

[0004] In order to achieve the above object, the present invention provides an ultra-wideband dual-polarization conformal antenna array, comprising:

[0005] A mounting platform, which is cylindrical and made of metal;

[0006] A plurality of dielectric walls, each of which has a curvature matching the cylindrical surface of the mounting platform and is arranged at intervals on the metal cylindrical surface of the mounting platform;

[0007] A horizontally polarized ultra-wideband antenna array, which is mounted on the dielectric wall, and whose inner surface is closely attached to the outer surface of the dielectric wall, and the horizontally polarized ultra-wideband antenna array is used to transmit and receive horizontally polarized electromagnetic waves;

[0008] A vertically polarized ultra-wideband antenna array, which is mounted on the horizontally polarized ultra-wideband antenna array, and whose inner surface is closely fitted with the outer surface of the horizontally polarized ultra-wideband antenna array, and the vertically polarized ultra-wideband antenna array is used to transmit and receive vertically polarized electromagnetic waves;

[0009] The horizontally polarized ultra-wideband antenna array and the vertically polarized ultra-wideband antenna array generate mutually perpendicular polarizations to achieve dual-polarization performance.

[0010] The vertically polarized ultra-wideband antenna array and the horizontally polarized ultra-wideband antenna array share a common ground.

[0011] The horizontally polarized ultra-wideband antenna array is composed of a tightly coupled Vivaldi microstrip antenna unit surrounding a carrier, and the tightly coupled Vivaldi microstrip antenna unit is a single-layer dielectric substrate.

[0012] A plurality of ultra-wideband microstrip baluns are arranged on the tightly coupled Vivaldi microstrip antenna unit for impedance matching.

[0013] The vertically polarized ultra-wideband antenna array is a dielectric-loaded horn antenna made of polyphthalimide, and its inner and outer surfaces are both electroplated with metal.

[0014] The vertically polarized ultra-wideband antenna array has an exponentially gradient profile structure for impedance matching.

[0015] The dielectric wall comprises: an MSS metamaterial and a slider, wherein the MSS metamaterial is installed below the horizontally polarized antenna array, the MSS metamaterial and the slider do not overlap, and the MSS metamaterial realizes axial guidance of obliquely incident horizontally polarized waves through a periodic structure, thereby achieving improvement of axial gain.

[0016] The dielectric wall is provided with a plurality of fastening holes, and a plurality of fastening screws are used to realize a fixed connection between the dielectric wall and the mounting platform. After the fastening screws are installed and tightened, the top of the head thereof is flush with the upper surface of the dielectric wall to ensure a tight fit between the horizontally polarized ultra-wideband antenna array and the dielectric wall.

[0017] The vertically polarized ultra-wideband antenna is provided with a plurality of first tuning holes, the horizontally polarized ultra-wideband antenna is provided with a plurality of second tuning holes, and the slider is provided with a plurality of third tuning holes. The positions of the first tuning holes, the second tuning holes and the third tuning holes are correspondingly arranged, and the number of the first tuning holes, the second tuning holes and the third tuning holes is equal. The first tuning hole is a threaded hole, and the second tuning hole and the third tuning hole are through holes. A plurality of tuning screws are respectively passed through the third tuning hole, the second tuning hole and the first tuning hole to realize fixed connection between the slider, the horizontally polarized ultra-wideband antenna array and the vertically polarized ultra-wideband antenna array.

[0018] The tuning screws are dielectric screws with different dielectric constants, and the performance of the vertically polarized ultra-wideband antenna array is adjusted by adjusting the tuning screws.

[0019] The present invention has the following advantages: the structure is novel, simple and reliable, and at the same time realizes ultra-wideband, low-profile, conformal, dual-polarization, high-gain and other performances. The antenna can be conformal to the carrier skin while realizing ultra-wideband dual-polarization characteristics, and can be applied to the fields of base station antennas and aesthetic antennas, and has broad market promotion prospects in the current civilian communication platform. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic structural diagram of an ultra-wideband dual-polarization conformal antenna array provided in an embodiment of the present invention.

[0021] Figure 2 An exploded diagram of an ultra-wideband dual-polarization conformal antenna array provided in an embodiment of the present invention.

[0022] Figure 3 A schematic diagram of the structure of a horizontally polarized antenna array provided in an embodiment of the present invention.

[0023] Figure 4 A schematic diagram of the structure of a vertically polarized antenna array provided in an embodiment of the present invention.

[0024] Figure 5 Schematic diagram of the installation structure of the dielectric wall, MSS metamaterial, slider, and tuning screw provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0025] The following is based on Figure 1 to Figure 5 , specifically describe the preferred embodiments of the present invention.

[0026] How to realize a low-profile ultra-wideband dual-polarization conformal antenna array on a carrier skin or a special-shaped structure is the current trend and research difficulty in the field of ultra-wideband antennas.

[0027] like Figure 1 and Figure 2 As shown, the present invention proposes an ultra-wideband dual-polarization conformal antenna array, comprising:

[0028] An installation platform 1, which is cylindrical and made of metal;

[0029] A plurality of dielectric walls 31, each of which has a curvature matching the cylindrical surface of the mounting platform 1 and is arranged at intervals on the metal cylindrical surface of the mounting platform 1;

[0030] A horizontally polarized ultra-wideband antenna array 21, which is mounted on the dielectric wall 31, and whose inner surface is closely fitted to the outer surface of the dielectric wall 31, and the horizontally polarized ultra-wideband antenna array 21 is used to transmit and receive horizontally polarized electromagnetic waves;

[0031] The vertically polarized ultra-wideband antenna array 22 is mounted on the horizontally polarized ultra-wideband antenna array 21, and its inner surface is tightly fitted with the outer surface of the horizontally polarized ultra-wideband antenna array 21. The vertically polarized ultra-wideband antenna array 22 is used to transmit and receive vertically polarized electromagnetic waves.

[0032] The horizontally polarized ultra-wideband antenna array 21 and the vertically polarized ultra-wideband antenna array 22 generate mutually perpendicular polarizations to achieve dual-polarization performance. The vertically polarized ultra-wideband antenna array 22 and the horizontally polarized ultra-wideband antenna array 21 share the same ground plane to ensure that the performance of each is not affected by the other.

[0033] like Figure 3 As shown, the horizontally polarized ultra-wideband antenna array 21 is composed of a tightly coupled Vivaldi microstrip antenna unit surrounding a carrier, the tightly coupled Vivaldi microstrip antenna unit is a single-layer dielectric substrate, and the tightly coupled Vivaldi microstrip antenna unit is processed through an integrated coplanar design to form an array, ensuring tight coupling and electrical continuity between antenna units. A plurality of ultra-wideband microstrip baluns 211 are arranged on the tightly coupled Vivaldi microstrip antenna unit for impedance matching.

[0034] like Figure 4 As shown, the vertically polarized ultra-wideband antenna array 22 is a dielectric-loaded horn antenna made of polyimide, and its inner and outer surfaces are both electroplated with metal. The vertically polarized ultra-wideband antenna array 22 has an exponential gradient profile structure 221 for impedance matching.

[0035] like Figure 5 As shown, the dielectric wall 31 includes: an MSS metamaterial 41 and a slider 32 disposed on the MSS metamaterial 41 .

[0036] The dielectric wall 31 is provided with a plurality of fastening holes 312, and a plurality of fastening screws 311 are used to realize a fixed connection between the dielectric wall 31 and the mounting platform 1. After the fastening screws 311 are installed and tightened, the top of the head thereof is flush with the upper surface of the dielectric wall 31 to ensure a tight fit between the horizontally polarized ultra-wideband antenna array 21 and the dielectric wall 31.

[0037] like Figure 3 , Figure 4 and Figure 5As shown, the vertically polarized ultra-wideband antenna 22 is provided with a plurality of first tuning holes 25, the horizontally polarized ultra-wideband antenna 21 is provided with a plurality of second tuning holes 24, and the slider 32 is provided with a plurality of third tuning holes 26, the first tuning hole 25 is a threaded hole, the second tuning hole 24 and the third tuning hole 26 are through holes, and the positions of the first tuning hole 25, the second tuning hole 24 and the third tuning hole 26 are correspondingly arranged, and the number is equal, and a plurality of tuning screws 23 are respectively passed through the third tuning hole 26, the second tuning hole 24 and the first tuning hole 25 to achieve a fixed connection between the slider 32, the horizontally polarized ultra-wideband antenna array 21 and the vertically polarized ultra-wideband antenna array 22. The tuning screws 23 are dielectric screws with different dielectric constants, and the length and installation position of the tuning screws 23 must be optimized, and the performance of the vertically polarized ultra-wideband antenna array 22 can be adjusted by adjusting the tuning screws 23.

[0038] The MSS metamaterial 41 is installed below the horizontally polarized antenna array 21, and the installation area does not overlap with the slider 32, and is fixed to the surface of the installation platform 1 by adhesive. The periodic structure is used to achieve axial guidance of obliquely incident horizontally polarized waves, thereby improving axial gain.

[0039] In this embodiment, the ultra-wideband dual-polarization conformal antenna array uses a total of 8 dielectric walls 31, and 8 fastening holes 312 are opened around each dielectric wall 31, and fixed connection with the mounting platform 1 is achieved through fastening screws 311, that is, a total of 64 fastening screws 311 are used in this embodiment. In addition, 24 first tuning holes 25 are opened on the vertically polarized ultra-wideband antenna array 22, and 3 first tuning holes 25 are opened in each unit, and the arrangement form is an isosceles triangle. Therefore, 24 second tuning holes 24 arranged in an isosceles triangle are correspondingly opened on the horizontally polarized ultra-wideband antenna array 21, and 24 third tuning holes 26 arranged in an isosceles triangle are also correspondingly opened on the 8 sliders 32. Finally, the slider 32, the horizontally polarized ultra-wideband antenna array 21 and the vertically polarized ultra-wideband antenna array 22 are fastened together by 24 tuning screws 23.

[0040] The present invention has the following advantages: the structure is novel, simple and reliable, and at the same time realizes ultra-wideband, low-profile, conformal, dual-polarization, high-gain and other performances, so that the antenna can be conformal to the carrier skin while realizing the ultra-wideband dual-polarization characteristics; it can be applied to the fields of base station antennas and aesthetic antennas, and has broad market promotion prospects in the current civilian communication platform.

[0041] It should be noted that, in the embodiments of the present invention, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0042] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] Although the content of the present invention has been described in detail through the above preferred embodiments, it should be appreciated that the above description should not be considered as a limitation of the present invention. After reading the above content, it will be apparent to those skilled in the art that various modifications and substitutions of the present invention will occur. Therefore, the protection scope of the present invention should be limited by the appended claims.

Claims

1. An ultra-wideband dual-polarization conformal antenna array, characterized in that: Include: A mounting platform, which is cylindrical and made of metal; A plurality of dielectric walls, each of which has a curvature matching the cylindrical surface of the mounting platform and is arranged at intervals on the metal cylindrical surface of the mounting platform; A horizontally polarized ultra-wideband antenna array, which is mounted on the dielectric wall, and whose inner surface is in close contact with the outer surface of the dielectric wall. The horizontally polarized ultra-wideband antenna array is composed of tightly coupled Vivaldi microstrip antenna units surrounding a carrier. The horizontally polarized ultra-wideband antenna array is used to transmit and receive horizontally polarized electromagnetic waves. A vertically polarized ultra-wideband antenna array, which is mounted on the horizontally polarized ultra-wideband antenna array, and whose inner surface is closely fitted with the outer surface of the horizontally polarized ultra-wideband antenna array, the vertically polarized ultra-wideband antenna array is a dielectric-loaded horn antenna made of polyphthalimide, and whose inner and outer surfaces are both electroplated with metal, and the vertically polarized ultra-wideband antenna array is used to transmit and receive vertically polarized electromagnetic waves; The dielectric wall comprises: an MSS metamaterial and a slider, wherein the MSS metamaterial is installed below the horizontally polarized antenna array, the MSS metamaterial and the slider do not overlap, and the MSS metamaterial realizes axial guidance of obliquely incident horizontally polarized waves through a periodic structure, thereby realizing an improvement in axial gain; The horizontally polarized ultra-wideband antenna array and the vertically polarized ultra-wideband antenna array generate mutually perpendicular polarizations to achieve dual-polarization performance.

2. The ultra-wideband dual-polarization conformal antenna array according to claim 1, characterized in that: The vertically polarized ultra-wideband antenna array and the horizontally polarized ultra-wideband antenna array share a common ground.

3. The ultra-wideband dual-polarization conformal antenna array according to claim 1, wherein: The tightly coupled Vivaldi microstrip antenna unit is a single-layer dielectric substrate.

4. The ultra-wideband dual-polarization conformal antenna array according to claim 3, characterized in that: A plurality of ultra-wideband microstrip baluns are arranged on the tightly coupled Vivaldi microstrip antenna unit for impedance matching.

5. The ultra-wideband dual-polarization conformal antenna array according to claim 1, wherein: The vertically polarized ultra-wideband antenna array has an exponentially gradient profile structure for impedance matching.

6. The ultra-wideband dual-polarization conformal antenna array according to claim 1, wherein: The dielectric wall is provided with a plurality of fastening holes, and a plurality of fastening screws are used to realize a fixed connection between the dielectric wall and the mounting platform. After the fastening screws are installed and tightened, the top of the head thereof is flush with the upper surface of the dielectric wall to ensure a tight fit between the horizontally polarized ultra-wideband antenna array and the dielectric wall.

7. The ultra-wideband dual-polarization conformal antenna array according to claim 1, 4 or 5, characterized in that: The vertically polarized ultra-wideband antenna is provided with a plurality of first tuning holes, the horizontally polarized ultra-wideband antenna is provided with a plurality of second tuning holes, and the slider is provided with a plurality of third tuning holes. The positions of the first tuning holes, the second tuning holes and the third tuning holes are correspondingly arranged, and the number of the first tuning holes, the second tuning holes and the third tuning holes is equal. The first tuning hole is a threaded hole, and the second tuning hole and the third tuning hole are through holes. A plurality of tuning screws are respectively passed through the third tuning hole, the second tuning hole and the first tuning hole to realize fixed connection between the slider, the horizontally polarized ultra-wideband antenna array and the vertically polarized ultra-wideband antenna array.

8. The ultra-wideband dual-polarization conformal antenna array according to claim 7, characterized in that: The tuning screws are dielectric screws with different dielectric constants, and the performance of the vertically polarized ultra-wideband antenna array is adjusted by adjusting the tuning screws.

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