High Selectivity Dual-band Bandpass Filters Using Dual-mode Resonators
关键词:
Bandpass filter, dual-band, dual-mode, transmission zeros摘要
Two high selectivity dual-band bandpass filters using dual-mode resonators are proposed in this paper. Four and six transmission zeros near the passbands can be easily achieved for two dual-band bandpass filters. A transmission zero located in the two passbands is used to realize good isolation for the two passbands. Two prototypes with center frequencies located at 1.93, 2.42 GHz, and 2.04, 2.32 GHz with upper stopband insertion loss greater than 20 dB are designed and fabricated. The two proposed dual-band bandpass filters show high passband selectivity, good out-of-band suppression.
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参考
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