Tunable microstrip quasi-elliptic function bandpass filters
作者： Jia-Sheng Hong , Wenxing Tang
DOI: 10.1109/EUMC.2009.5296313
关键词:
摘要: In this paper, a new type of varactor-tuned microstrip quasi-elliptic function bandpass filter based on dual-mode open-loop resonator is investigated. By employing the unique characteristic resonator, i.e. whose two operating modes (odd-and even-modes) do not couple to each other, tuning passband frequency becomes simple with single DC bias circuit. Two finite-frequency transmission zeros side are tunable along center frequency, resulting in high selective response. A designed four-pole demonstrated experimentally.
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