谐振器
带通滤波器
微波食品加热
插入损耗
材料科学
微带线
光电子学
通带
物理
电子工程
滤波器(信号处理)
阻带
作者
Andrea Ashley,Dimitra Psychogiou
出处
期刊:IEEE Transactions on Microwave Theory and Techniques
日期:2021-03-17
卷期号:69 (4): 2178-2190
被引量:1
标识
DOI:10.1109/tmtt.2021.3061431
摘要
This article reports on the RF design and practical development of RF co-designed bandpass filters/isolators (BPFIs). They are based on series-cascaded nonreciprocal resonant stages, microwave resonators, and multiresonant cells. The nonreciprocal stages are shaped by an in-parallel cascaded transistor-based path and a transmission line (TL) that result in a zero-phase resonance in the forward direction and high isolation (IS) in the reversed one. The operating principles of the nonreciprocal resonant stage are presented through circuit analysis and coupled-resonator diagrams (CRDs) that facilitate their design with coupled-resonator-based filter design methods. Various CRD-synthesized examples of low- and high-order transfer functions with and without transmission zeros are shown. They demonstrate the applicability of the proposed method for alternative-type of filtering responses with and without gain in the forward direction and high levels of IS in the reversed one. For proof-of-concept demonstration purposes, five prototypes were designed, manufactured, and measured at $S$ -band.
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