Phase electric modulation antenna

Abstract

The invention relates to the technical field of electrocommunication, in particular to a phase electric modulation antenna. The phase electric modulation antenna comprises a coaxial line interface, a wide band printing one-arm helical antenna body, an active controllable circuit and a dielectric substrate. The wide band printing one-arm helical antenna body is printed on the upper surface of the dielectric substrate, an inner conductor of the coaxial line interface is directly connected with an input port of the wide band printing one-arm helical antenna body through a penetrating hole in the dielectric substrate, an outer conductor of the coaxial line interface is connected with the ground, the active controllable circuit comprises an adjustable capacitor and a direct current biasing circuit, one end of the adjustable capacitor is connected to the tail end of the wide band printing one-arm helical antenna body, the other end of the adjustable capacitor is directly connected with the ground, and the direct current biasing circuit is connected to the two ends of the adjustable capacitor in parallel. The phase electric modulation antenna uses the mode of loading the adjustable capacitor to achieve continuous changing of phase characteristics of the phase electric modulation antenna by controlling continuous changing of an adjustable capacitance value. The phase electric modulation antenna is simple in structure, easy to achieve, low in cost and strong in operability, and solves the problem that the bandwidth is limited.

Description

technical field [0001] The invention relates to the technical field of electronic communication, in particular to an electrically adjustable phase antenna, which can be used in production, retail, phased array antennas and microwave systems requiring continuous phase shifting in wide frequency bands. Background technique [0002] The electrically adjustable phase antenna is an antenna whose phase continuity can be adjusted by means of a loaded adjustable capacitor and a broadband printed single-arm helical antenna. As a continuous-phase antenna with wide frequency band and relatively simple structure, the antenna can be widely used in various microwave systems. [0003] The traditional phase shifter is called a phase shifter. According to the control circuit used, the phase shifter can be divided into "analog" phase shifter and "digital" phase shifter. The "analog" phase shifter controls the change of the output phase shift through the magnitude of the analog quantity of vo...

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to overcome the problems of the above-mentioned existing phased array antennas that the frequency band is not wide enough, the design complexity of the feeding phase-shifting network, the phase-shifting accuracy and the reliability of the system are insufficient, and propose an electronically adjustable phase antenna , combining the phase shift function with the characteristics of the antenna itself, with a simple structure design, to achieve the improvement of the main performance

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