A Conformal Vertically Polarized Omnidirectional Antenna for Ultrashort Wave Airfoil

Abstract

The invention relates to an ultra-short wave wing conformal vertical polarization omnidirectional antenna which comprises a radiation patch, a resistor and inductor parallel loading element, a first exponential profile metal sheet, a metal floor and a second exponential profile metal sheet. The radiation patch is located on the upper surfaces of the wing; the first exponential profile metal sheetis located at the center of the radiation patch and is connected with a feed coaxial cable; the metal floor is positioned on the lower surface of the wing; the exponential profile metal sheets are positioned at two ends of the radiation patch and are connected with the metal floor; and one end of the resistor and inductor parallel loading element is welded on the radiation patch, and the other endis welded on the second exponential profile metal sheet. The antenna realizes good matching in an ultra-short wave microwave ultra-wide frequency band, the voltage standing-wave ratio in a full frequency band is less than 2.5, the omnidirectional radiation of a horizontal plane is realized in a vertical polarization working form, complete conformity with wings is realized, the height of the section of the antenna is 45mm, an airplane appearance structure is not additionally added, and the original aerodynamic performance of an airplane is protected.

Description

technical field [0001] The invention belongs to the technical field of antenna engineering, and in particular relates to the wing conformal antenna technology of an ultrashort wave unmanned reconnaissance aircraft. It discloses an ultrashort wave wing conformal vertically polarized omnidirectional antenna, specifically an evolution of a traditional monopole antenna. The resulting double-layer patch antenna can be completely conformal to the wing platform, has a vertically polarized working form, an extremely low profile height, and a horizontal omnidirectional radiation effect. It is especially suitable for wing conformal antennas that require a good conformal shape with the wing, work in the ultra-short wave microwave ultra-wide band, vertically polarized, and radiate omnidirectionally in the horizontal plane. Background technique [0002] With the rapid development of UAV technology, UAV has received more and more attention, and it is widely used in various fields such as ...

AI Technical Summary

Problems solved by technology

[0003] The existing airborne conformal omnidirectional antennas are all horizontally polarized and can only achieve omnidirectional radiation on the vertical plane. Although this kind of horizontally polarized omnidirectional antenna can conform to the fuselage better, the antenna It can be seen from the working principle that the antenna structure in the ultrashort wave band is very long in the horizontal direction, which makes the antenna only attached to the surface of the aircraft, which also determines that the polarization mode of the antenna can only be horizontal polarization

At present, the airborne omnidirectional antenna that can achieve vertical polarization is a knife antenna. Although the knife antenna has vertical polarization characteristics and omnidirectional radiation in the horizontal plane, the knife antenna is an exposed antenna, and the exposed structure is damaged. Good aerodynamic performance of the aircraft itself

The size of the blade antenna in the ultrashort wave band is very large, which seriously damages the aerodynamics of the aircraft itself. Although the size of the blade antenna can be reduced by miniaturization technology to weaken the impact on the aerodynamic performance of the aircraft itself, the miniaturization The degree is also limited, and miniaturization is usually at the expense of antenna radiation efficiency, so the inability to conform to the carrier is still the biggest problem with the blade antenna as an airborne antenna

Therefore, there is currently no omnidirectional airborne antenna that can be completely conformal to the aircraft and has vertical polarization characteristics

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