Onboard all-directional communication antenna with low radar cross section

Abstract

The invention discloses an onboard all-directional communication antenna with a low radar cross section. The defect that an existing onboard all-directional communication antenna is high in radar cross section and cannot ensure radiation and scattering properties. The onboard all-directional communication antenna comprises a radiation body and a floor. The radiation body comprises upper and lower frames (11 and 14), left and right frames (15 and 16) and two radiation pieces (12 and 13). The upper and lower frames are strip-shaped metal plates with hexagonal surfaces and different in length. The left and right frames are big-end-up oblique triangular prism shaped metal barrels with cavities. The radiation pieces (12 and 13) are rectangular metal plates different in length. The upper frame, the first radiation piece, the second radiation piece and the lower frame are parallelly arranged from top to bottom and connected between the left and right frames to form a step-shaped frame structure with appearance similar to an airplane vertical tail shape and provided with different left and right included angles. The onboard all-directional communication antenna has the advantages of being stable in radiation performance and low in radar cross section and can serve as a communication antenna used on a low-radar-cross-section airplane.

Description

technical field [0001] The invention belongs to the technical field of antennas, and relates to an airborne omnidirectional communication antenna, which is suitable for airborne antennas that require both radiation characteristics and scattering characteristics and have a working frequency range of 30MHz to 300MHz. Background technique [0002] In the traditional communication field, the signal transmitting and receiving system is one of the most important components of the entire communication platform, the antenna is the core part of the system, and the radiation characteristics and scattering characteristics are the main indicators to measure the performance of the antenna. The key to improving the scattering characteristics is how to reduce the radar cross section, and the radar cross section is the most basic parameter in the scattering characteristics. It refers to a measure of the return power of a target in a given direction under the illumination of a plane wave. ...

AI Technical Summary

Problems solved by technology

[0005] figure 1 An existing airborne omnidirectional communication antenna is given. The antenna is composed of two parts: the antenna radiator and the antenna floor of the vertical tail-shaped hollow metal structure. This antenna has good radiation characteristics, but due to the Radiation characteristics, the antenna structure has a large metal surface, so the radar cross section of the antenna is very high, and it does not have good scattering characteristics

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