Microstrip array discone composite conformal antenna

Abstract

The invention discloses a microstrip array discone composite conformal antenna and aims at providing a composite antenna which is low in profile and easy to conform to a carrier. The antenna is realized through the following technical scheme. The technical scheme comprises the following steps that 1, a metal cone and a metal disc which are fixed on a cavity bottom of a reflection cavity are embedded to form a discone antenna; at least 2*2 rectangular radiation patch units are arranged on the dielectric substrate fixedly connected to the metal disc; the rectangular radiation patch units are connected in parallel and feed through one-in-four microstrip power divider; and the discone antenna and the microstrip array antenna form a composite antenna array which can radiate horizontal omnidirectional L-frequency band vertical polarization signals and can directionally radiate C-frequency band horizontal polarization signals to a zenith. A voltage standing wave ratio VSWR of the composite antenna is smaller than or equal to 2, and an isolation degree S21 of two ports is larger than or equal to 30 dB. The antenna has a multi-frequency broadband characteristic, and can meet requirements ofgain and airspace coverage required by an airborne platform L-band data link function and a radio altimeter function.

Description

technical field [0001] The present invention relates to the technical field of antennas, and more specifically relates to an airborne platform capable of transmitting and receiving L-band electromagnetic waves and C-band electromagnetic waves to complete omnidirectional data link functions and height measurement functions Conformal composite antenna. Background technique [0002] With the development of wireless communication technology, more and more communication equipment is loaded on the aircraft, which makes the density of airborne radio frequency sensor equipment higher and higher. It is necessary to carry out a reasonable comprehensive design of the antenna aperture in the limited installation space. . [0003] The airborne L-band omnidirectional antenna mainly realizes the data link (including communication, navigation and identification) functions. It is a multi-functional integrated antenna. Through time-division multiplexing, multiple functions can be shared with...

AI Technical Summary

Problems solved by technology

The working bandwidth of the L-band omnidirectional antenna is close to 50%. It is a broadband antenna and requires omnidirectional radiation of horizontal and vertical polarization. Generally, a monopole-type knife antenna is used. This exposed antenna will not only affect the aerodynamic performance of the carrier. And there will be conflicts in the assembly position, and there will be problems such as diffraction occlusion and electromagnetic compatibility.

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