Active circulator without need of bias magnetic field

Abstract

The invention discloses an active circulator without the need of a bias magnetic field, which is composed of three microstrip feeders, three sets of MIM capacitors, three sets of interdigital capacitors and three sets of microstrip resonant structures, wherein the three microstrip feeders are used for feeding in and out electromagnetic wave signal energy, the three sets of MIM capacitors are respectively connected to the input ends of the microstrip feeders and perpendicular to the feeders, and the three sets of interdigital capacitors are respectively connected to the input ends of the microstrip feeders. The three microstrip feeders are respectively in 120-degree symmetry, the three sets of matched MIM capacitors and interdigital capacitors are in 120-degree symmetry, the three sets of microstrip resonant structures are respectively located in the included angles formed by the three microstrip feeders in a 120-degree symmetry mode. Each microstrip resonant structure is formed by connecting one triangular ring microstrip structure with a power amplifier with a gain of 0dB, and the two sides forming a 120-degree angle of the triangular ring microstrip antenna are parallel to the microstrip feeders. The active circulator has the advantages of no need of a bias magnetic field, convenient integration, high response frequency and the like, and is applicable to a radio frequency microwave communication system.

Description

technical field [0001] The invention relates to the technical field of microwave devices, in particular to an active circulator without a bias magnetic field. Background technique [0002] The circulator is one of the indispensable devices in the microwave circuit system, and it is a multi-port non-reciprocal device with directional transmission characteristics. The development direction of the circulator is miniaturization, high frequency band and wide frequency band. Microstrip structures include microstrip, waveguide, stripline, and coaxial, among which microstrip three-terminal circulators are the most, with ferrite material as the medium, using the non-reciprocal propagation effect of microwave in ferrite medium designed and made. Changing the direction of the bias magnetic field changes the direction of the loop. [0003] Modern radio frequency microwave integrated circuits are developing toward higher integration, while traditional circulators are difficult to achi...

AI Technical Summary

Problems solved by technology

This technical solution improves the performance of the port and improves the quality of the port signal, but the circulator requires a bias magnetic field and is not easy to integrate

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