An ultra-wideband bandpass filter having sharp skirt property and large attenuations in its stopband
✍ Scribed by Koji Watanabe; Zhewang Ma; Chun-Ping Chen; Tetsuo Anada
- Book ID
- 102949426
- Publisher
- John Wiley and Sons
- Year
- 2009
- Tongue
- English
- Weight
- 599 KB
- Volume
- 51
- Category
- Article
- ISSN
- 0895-2477
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✦ Synopsis
Abstract
An ultra‐wideband (UWB) bandpass filter having a midband frequency of 4.1 GHz and a fractional bandwidth of 34.1% is developed to meet Japan's UWB low‐band spectrum limit. To get sharp skirt property near the passband and large attenuations over a wide stopband, a microstrip stub‐loaded ring resonator and parallel‐coupled stepped‐impedance two‐mode resonators are used simultaneously, and their advantages are fully exploited. Both the simulated and measured frequency responses of the filter satisfy well Japan's low‐band spectrum limit. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 2093–2097, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24557