科研之友
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摘要
A compact second-order microstrip bandpass filter with good frequency selectivity and a wide stopband consists of two dissimilar half-wavelength stepped impedance resonators (SIR) with centrally-embedded bandstop resonators. By adding one short-circuited stub, wideband spurious suppression is realized. Design and synthesis procedures are provided. Measurement is in good agreement with simulation. It exhibits a fractional bandwidth of 7.7 percent at 2.07 GHz with 17.4 dB of suppression from 2.25 up to 20 GHz. The size of the filter is only 0.19 x 0.19 lambda g (where lambda g is the guide wavelength at center frequency) without the use of any lumped elements.
- 出版日期2015-11
- 单位华中科技大学
