Dual-Mode Dual-Band Bandpass Filter Using a Single Slotted Circular Patch Resonator

被引：62

作者：

Zhang, Runqi ^{[1
]}

Zhu, Lei ^{[1
]}

Luo, Sha ^{[2
]}

机构：

[1] Nanyang Technol Univ, Sch Elect & Elect Engn, Singapore, Singapore

[2] Natl Univ Singapore, Dept Elect & Comp Engn, Singapore 117548, Singapore

来源：

IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS | 2012年 / 22卷 / 05期

关键词：

Circular patch resonator; degenerate and higher-order modes; dual-band bandpass filter (BPF);

D O I：

10.1109/LMWC.2012.2192419

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A single slotted circular patch resonator is proposed in this letter to design a novel dual-mode dual-band bandpass filter. Four identical arc-oriented slots are first symmetrically etched into the circular patch resonator to move the TM01-like mode to a lower frequency. Together with the TM21-like mode, these two modes make up the second passband of the proposed filter. A pair of radial-oriented slots is then etched into the edge of the circular patch to split a pair of TM11-like degenerate modes, which forms the first dual-mode passband. Two high-impedance transmission lines are connected to the proposed resonator at a 90 degrees angle to properly excite the four resonant modes described above. Finally, a filter with input/output cross coupling is designed, fabricated and tested to demonstrate the dual-mode dual-band filtering performance, which exhibits a sharp out-of-band rejection skirt and good rejection between the dual passbands.

引用

页码：233 / 235

页数：3

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