Miniaturized Circular Substrate Integrated Waveguide Bandpass Filter With Flexible Mixed Coupling and Wide Stopband Rejection. - Xiang Wang; Neng-Yuan Zhong; Huangyan Li; Ji-Yang Chu; Hang Yang; Xian-Long Yang; Xiao-Wei Zhu 002; Wen Wu 005 (IEEE Trans. Circuits Syst. II Express Briefs, 2024)