Synthesis of Microwave Devices Based on a Microwave Ring Elliptical Resonator

Actuality. Research of ring resonating structures is interesting to developers of microwave devices; some features of ring elliptical resonators lead to the emergence of unique properties of the transmission characteristics of the device. Method of excitation for CER is particularly important. It is possible to obtain the traveling wave mode in these structures, under certain conditions. To the synthesis of microwave devices, as well as to the study of methods for exciting and evaluating the mode of the wave process in the structure this paper is devoted.

Object. The purpose of the study is to analyze and organize information about the development of microwave devices using circular elliptical resonators (CERs). Authors also want to test the results of using dual CERs.

Methods. The authors have conducted an analytical review of recent scientific publications and performed computer modeling of microstrip ring elliptical resonators that operate in the ultrahigh frequency range in this work. The paper also includes the results of our experiments, tested by various researchers, including those supported by grants from the Russian Foundation for Basic Research.

Result. The article explores the unique characteristics of loop strip filters and highlights the limitations of using strip resonators. It that describes the design of a ring elliptical resonator (CER), and suggests its potential as an alternative to microstrip resonators. The paper presents the results of numerous experiments on the development of microwave devices based on CERs. The results of numerous experiments of the synthesis of microwave devices based on СER and including: single; double resonators; preselective filters; amplifiers and generators based on a ring and active bipolar are presented.  Additionally, the issue of connecting the resonator to the main transmission line is addressed. The results of modeling several devices that limit the direction of propagation of an electromagnetic wave in an annular resonator are presented.

Scientific novelty. This article introduces a new design of a double elliptical resonator based on a microstrip line. It also describes the results of an experiment that shows that the resonator topology can achieve a filter rejection level of over 70 dB. In the article, the authors also discuss the problem of selecting a power supply method and ensuring the wave propagation mode in the CER.

Practical significance. The results obtained in the course of this work can be used to create a traveling wave resonator on a microstrip line or in other planar or volumetric configurations. The results of the study also serve as the basis for the creation of a generalized theory of synthesis of ring resonators in the microwave wavelength range.

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