✦ LIBER ✦

Miniaturized multilayer hairpin bandpass filter with tunable transmission zeros

✍ Scribed by Min-Hung Weng; Tsung-Hui Huang; Jee-Gong Chang; Cheng-Yuan Hung; Bun-Tong Dai

Publisher: John Wiley and Sons
Year: 2004
Tongue: English
Weight: 156 KB
Volume: 41
Category: Article
ISSN: 0895-2477
DOI: 10.1002/mop.20044

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

A miniaturized multilayer hairpin bandpass filter using tapped‐line I/O with tunable transmission zeros is designed and implemented. This structure provides additional cross‐coupling between two layers, as well as the coupling effect on the same layer. The designed filter demonstrates superior passband characteristics with a central frequency f~0~= 2.39 GHz, insertion loss S~21~= −1.45 dB and a return loss S~11~= −32 dB. Moreover, by combining with two layers and tapped‐line I/O structure, the filter produces two tunable transmission zeros at 2.8 GHz with −48 dB and 3.2 GHz with −43‐dB rejection that the typical elliptic function response can be easily. Experimental results of the fabricated filter measured by network analyzer agree well with the simulation results. © 2004 Wiley Periodicals, Inc. Microwave Opt Technol Lett 41: 53–55, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20044

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