A Compact Wideband Microstrip Filter Using Folded Multiple-Mode Resonator

作者：Wang, Huan^*; Chu, Qing Xin; Gong, Jian Qiang

来源：IEEE Microwave and Wireless Components Letters, 2009, 19(5): 287-289.

DOI：10.1109/LMWC.2009.2017591

• Folded multi-mode resonator
• transmission zero
• wideband bandpass filter (BPF)

A compact wideband microstrip filter using a folded multiple-mode resonator is proposed. The filter contains only one resonator, which operates as not only a resonant element but also an open stub. The filter simultaneously realizes a broad passband, a compact size, and two transmission zeros at both the lower and upper stopbands. The transmission zero mechanism is investigated in detail through the simple transmission line equation. A lucid equivalent circuit is given both for analysis and initial design of the proposed filter. The fabricated filter shows the merits which are listed as follows: compact size and sharp skirts.

• 出版日期2009-5
• 单位华南理工大学