Compact, Wide Stopband, Shielded Hybrid Filter Based on Quarter-Mode Substrate Integrated Waveguide and Microstrip Line Resonators

• Published in: IEEE microwave and wireless components letters Vol. 31; no. 3; pp. 245 - 248
• Main Authors: Zheng, Yan, Zhu, Yilong, Wang, Zhan, Dong, Yuandan
• Format: Journal Article
• Language: English
• Published: IEEE 01.03.2021
• Subjects: Band-pass filters; Bandpass filters (BPFs); controllable transmission zeros (TZs); Couplings; Microstrip; microstrip resonator; Microstrip resonators; Q-factor; quarter-mode substrate integrated waveguide (QMSIW); Resonators; Substrates

A novel miniaturized bandpass filter (BPF) with high stopband rejection based on a hybrid structure is proposed with shielded quarter-mode substrate integrated waveguide (QMSIW) and microstrip technologies. The shielded QMSIW cavity provides a high-quality (<inline-formula> <tex-math notati...