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- Title
Tunable sharp notch filter for UWB application.
- Authors
Yamamoto, Yasuhisa; Li, Keren; Hashimoto, Osamu
- Abstract
This article presents a novel tunable sharp notch filter using open stub structure with varactor for implementing detect-and-avoid method into ultrawideband radio system. On the basis of the experimental results on the open stub structure with lumped capacitor, we introduced two techniques in this work to realize a tunable sharp notch filter using open stub structure with varactor to perform narrow stopband and using resistors to build a DC bias circuit, so that no influence to the tunable notch filter over a wide band. The developed tunable notch filter has excellent performance: wide tuning range from 3.65 to 4.35 GHz with low tuning voltage from 0 to 6 V, narrow bandwidth less than 270 MHz of the notch filter (at 10 dB insertion loss at 0 V), and compact size of the developed filter: about 2.0 cm × 4.0 cm. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 2712–2715, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23773
- Subjects
ELECTRIC filters; VARACTORS; ULTRA-wideband devices; CAPACITORS; RADIO resistors
- Publication
Microwave & Optical Technology Letters, 2008, Vol 50, Issue 10, p2712
- ISSN
0895-2477
- Publication type
Article
- DOI
10.1002/mop.23773