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This paper presents a novel balanced dual-band bandpass filter with in-band common-mode suppression via multiple transmission zeros from the doubly short-ended coupled line. Through the analysis of coupled line structures, the transmission zeros in the differential- and common-mode equivalent circuits are extensively studied. In differential-mode, the transmission zeros, produced by both short-ended...
A compact differential bandpass filter (BPF) based on Coupled Cross-Shaped Resonator (CCSR) with short termination is presented in this paper. The differential-mode (DM) and common-mode (CM) equivalent half circuits of proposed CCSR are given and discussed. In DM operation, a wide passband is designed from 4.0 GHz to 5.0 GHz with a fractional bandwidth (FBW) of 22% Under CM condition, controllable...
A novel compact differential bandpass filter (BPF) with parallel coupled resonator and capacitive load is proposed in this paper. The differential- and common-mode equivalent half circuits are given and discussed. By properly designing the coupled resonator and the loaded capacitance, differential-mode passband responses and common-mode rejection can be obtained. In common-mode operation, loaded capacitive...
In this paper, a novel differential bandpass filter (BPF) with dual-band filtering response is proposed. The equivalent circuits of proposed dual-band filter are illustrated and analyzed in both differential-mode and common-mode. By controlling the electrical length of an open stub in the differential-mode, two passbands operating at the desired frequency ratio can be designed. Also, the spurious...
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