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摘要
A wideband bandstop filter (WBSF) with extended upper passband consists of a modified transmission line ring with one embedded capacitor. Interference between two signal paths produces three adjustable transmission zeros used to create a wide, controllable stopband. Use of the embedded capacitor prevents the stopband from repeating at odd multiples of the fundamental stopband center frequency, resulting in a much wider upper passband. The circuit is simple, very compact and easy to fabricate. A prototype WBSF has a 20 dB rejection bandwidth of 90.7 percent at a center frequency of 1.2 GHz.
- 出版日期2017-8
- 单位浙江理工大学
