Design of an 11-Pole BPF Using Cascaded Triplets of TM010 Mode Dielectric Ring Resonators
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Name: Design of an 11-Pole BPF Using Cascaded Triplets of TM010 Mode Dielectric Ring Resonators
Authors: Fan Liu; Zhewang Ma; Weihao Zhang; Masataka Ohira; Dongchun Qiao; Guosheng Pu; Masaru Ichikawa
Published In: 2020 IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization (NEMO)
An 11-pole high-performance bandpass filter (BPF) using TM 010 mode dielectric ring resonators is presented in this paper. The filter consists of three cascaded triplets (CT) of resonators with three cross-couplings which produce three controllable transmission zeros (TZs). Meanwhile, the source-load coupling is intendedly avoided. As a result, a sharp roll-off rate of the passband skirt is achieved, and the ratio between the 40-dB bandwidth and the 3-dB bandwidth is as small as 1.18. The out-of-band rejections near the lower and upper side of the passband are as large as about 120 dB and 110 dB, respectively. The filter is compact, low-loss, and is a good candidate for wireless applications.
Posted on Oct 26, 2021