Microstrip Dual-Mode Bandpass Filter with Ultra-Broad Stopband Using Aperture-Backed Stepped-Impedance Ring Resonator(Microwaves, Millimeter-Waves)
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概要
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A novel microstrip dual-mode bandpass filter with ultra-broad stopband is proposed using the aperture-backed stepped-impedance ring resonator (SIRR). This SIRR consists of low-impedance strips in the four bended corners and high-impedance strips in the four straight sides. With the cross-shaped aperture placed on the ground underneath the SIRR, the upper stopband is significantly broadened. In particular, the 2nd resonant frequency of this proposed SIRR is confirmed to exceed the four times of its 1st counterpart. The dual-mode filter with the passband of 7.5% at 1.59 GHz is then designed and implemented, demonstrating the measured stopband of 1.70-5.80 GHz and size reduction of 56.0%.
- 社団法人電子情報通信学会の論文
- 2005-11-01
著者
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ZHU Lei
School of Electrical & Electronic Engineering, Nanyang Technological University
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WANG Hang
School of Electrical & Electronic Engineering, Nanyang Technological University
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Wang Hang
School Of Electrical & Electronic Engineering Nanyang Technological University
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