Modified maximally flat parallel-coupled lines for band-pass filter applications and miniaturizations

✍ Scribed by Ji-Chyun Liu; Bing-Hao Zeng; Jun-Mao Chang; Chi-Hsun Chien; Chung-Chi Chang; Dau-Chyrh Chang

• Publisher: John Wiley and Sons
• Year: 2008
• Tongue: English
• Weight: 790 KB
• Volume: 50
• Category: Article
• ISSN: 0895-2477
• DOI: 10.1002/mop.23243

✦ Synopsis

Abstract

The modified configurations of maximally flat parallel‐coupled lines (MF‐PCL) structure are introduced to improve the performance of the conventional MF‐PCL resonator. To obtain a higher rejection (−39 dB), symmetry response, wider band (BW about 32%), and less insertion loss (−0.4 dB) filters at central frequency 5.78 GHz, the modified MF‐PCL resonators by using enhanced coupling techniques are proposed herein. The size reduction of 50% is achieved. Results including surface current distributions and frequency responses are presented and discussed. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 902–906, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23243