## Abstract In this paper, we propose a novel parallel‐coupled microstrip bandpass filter with a wide stopband. The proposed bandpass filter with spur lines provides a deep and wide stopband because spur lines can provide deep stopband characteristics in some frequency bands. Also, the experimental
A parallel coupled-line bandpass filter with wide stopband using slotted ground structures
✍ Scribed by Min-Hang Weng; Hung-Wei Wu; Yu-Chi Chang; Chun-Yueh Huang; Yan-Kuin Su
- Publisher
- John Wiley and Sons
- Year
- 2006
- Tongue
- English
- Weight
- 261 KB
- Volume
- 49
- Category
- Article
- ISSN
- 0895-2477
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✦ Synopsis
Abstract
This letter proposes a parallel coupled‐line bandpass filter (BPF) using the folded slotted ground structures (SGSs) to improve the wide stopband. It is shown that the designed folded SGS has a very small area in comparison of previous works. The folded SGS exhibits a dual stopband characteristic owing to the bandgap resonant characteristic of SGS to suppress the harmonic frequency of the parallel coupled‐line BPF. Good agreement with electro‐magnetic simulation and measurement is demonstrated. © 2006 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 159–162, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22065
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