A Modified Dual-Mode Bandpass Filter Using Inductively Slotted Square Resonator Without Coupling Gaps
Haiwen Liu, Zhiguo Shi, Zhiqun Cheng, Zhengfan Li, and Jixing Gu
A dual-mode bandpass filter using inductively slotted square resonator without coupling gaps is designed and fabricated. This filter has the advantages of low insertion loss in the passband. Moreover, without coupling gaps, this filter can reduce uncertainty in fabrication. The simulated and measured results verify the validity of the proposed filter.
Keywords: Bandpass filter; dual-mode; slotted square resonator; insertion loss.