## Abstract In this letter, a compact ultra‐wideband (UWB) bandpass filter (BPF) is presented with improved upper stopband performance using six defected ground structures (DGS).The proposed BPF is composed of seven DGSs which are positioned under the input and output microstrip line and coupled do
Compact ultra-wideband bandpass filter using uniplanar compact photonic bandgap structure
✍ Scribed by J. W. Baik; D. H. Hyun; J. Jeong; Y.-S. Kim
- Publisher
- John Wiley and Sons
- Year
- 2007
- Tongue
- English
- Weight
- 172 KB
- Volume
- 49
- Category
- Article
- ISSN
- 0895-2477
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✦ Synopsis
Abstract
A novel ultra‐wideband (UWB) bandpass filter in the whole UWB passband of 3.1–10.6 GHz is proposed and implemented using a uniplanar compact photonic bandgap (UC‐PBG) resonator for size reduction. Since the UC‐PBG structure has more distributed L‐C components than the conventional microstip multiple‐mode resonator (MMR), the size reduction is achieved, which is about 34% more than the UWB bandpass filter based on a conventional microstrip MMR. The proposed one‐stage UC‐PBG filter has four transmission poles, insertion loss < 1.2 dB and group delay variation < 0.14 ns, while the three‐stage one shows an insertion loss of < 2.2 dB and a group delay variation of < 0.4 ns in the whole UWB band. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 2122–2123, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22695
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