A broadband phased array antenna unit and its radiation method

Abstract

The invention relates to a broadband phased array antenna unit and a radiation method thereof. The external radio frequency signal is fed into the broadband phased array antenna unit through a feedingcoaxial connector, and the fed external radio frequency signal forms two different current distributions on the cooperation of a ring radiator and a ring radiator, a matching branch and an additionalresonant branch respectively; the external radio frequency signal is fed into the broadband phased array antenna unit through a feeding coaxial connector. The current on the annular radiator resonates at high frequencies of the operating frequency, The loop radiator, the matching branch and the additional resonant branch form the resonant current at the low frequency, the two resonant points effectively increase the bandwidth of the antenna element, and the electromagnetic waves generated by the two resonant points are radiated into the free space by the wideband phased array antenna element;the loop radiator, the matching branch and the additional resonant branch form the resonant current at the low frequency. The impedance matching of wideband phased array antenna elements is realizedby changing the input impedance of wideband phased array antenna with matching branch and loop radiator. The invention can be widely applied to phased array antennas of mobile platforms such as satellite-borne, airborne, missile-borne and ground-based terminals.

Description

technical field [0001] The invention relates to a broadband phased array antenna unit and a radiation method thereof, which can be used in the field of antennas, especially wide bandwidth angular scanning antennas, and belong to the technical field of electromagnetic radiation. Background technique [0002] The highly integrated phased array antenna has the advantages of beam agility and high reliability, and can be widely used in various mobile wireless platforms. In order to improve the system capacity, output transmission rate and other requirements, the antenna needs to have broadband characteristics. For example, in the Ka-band phased array antenna used in the future satellite communication system, the antenna bandwidth needs to reach 10%. [0003] The microstrip antenna has the advantages of low profile and light weight, and has a very wide demand in the engineering field. The microstrip loop antenna is a miniaturized microstrip antenna unit, while reducing the size ...

AI Technical Summary

Problems solved by technology

However, the bandwidth of the microstrip antenna is generally narrow, especially the miniaturized microstrip loop antenna, whose bandwidth is only about 30% of the traditional microstrip antenna, which means that the bandwidth of the microstrip loop antenna can only reach 1%~ 3%, which greatly limits the application of microstrip loop antennas in practical engineering

Images