A compact saber antenna with reconfigurable pattern

Abstract

A compact saber antenna with reconfigurable pattern, including a metal floor, a dielectric substrate, a metal ring and a Π-shaped metal polygon; a thin slot is opened on the metal ring and a switch is located at the thin slot. Since the switch has two states of on and off, it can realize the switching of two radiation modes: monopole mode and dipole mode. When the switch is turned on, the antenna works in the monopole radiation mode, the metal ring is equivalent to a monopole antenna and the Π-shaped metal polygon acts as a reactance load, which can further reduce the resonant frequency and widen the bandwidth; when the switch is turned off, the metal ring is excited by coupling From the dipole mode of the Π-shaped metal polygon, the antenna works in the dipole radiation mode. The invention has the advantages of small size, small vertical sheet structure wind resistance and half-space angle coverage, etc., and is suitable for various compact saber antennas represented by airplanes that need to ensure maximum range angle communication coverage and low wind resistance.

Description

technical field [0001] The invention belongs to the technical field of antennas, and relates to a saber antenna, in particular to a compact saber antenna with a reconfigurable pattern. Background technique [0002] The airborne antenna is the medium through which the aircraft communicates with the outside world through electromagnetic wave propagation, and is a part of the aircraft's many perception systems. The quality of the airborne antenna determines the communication quality of the whole system, so it is of great significance to study the airborne antenna. The aircraft will perform complex maneuvers in the air, so it is hoped that the antenna can ensure the maximum range of angle coverage when the aircraft is in different attitudes. Due to the flight characteristics of the aircraft, the airborne antenna must also meet the aerodynamic requirements and reduce the air resistance as much as possible. However, the limited size of airborne antennas and their location on met...

AI Technical Summary

Problems solved by technology

[0003] At present, the research results of airborne antennas at home and abroad are generally antennas with horizontal omnidirectional radiation characteristics, such as patent [CN102881995A] and literature ["Omnidirectional Dual-Polarized Antenna With Sabre-Like Structure", P. Liu et al., "IEEE Transactions on Antennas and Propagation", Vol. 65, March 2017] are all horizontal omnidirectional antennas, which cannot fully cover half-space angle coverage, and the size is not compact enough, and the wind resistance is not small enough

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