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This letter reports a new kind of matching network for quad-channel diplexers. The matching network is comprised by some open- and short-circuited transmission lines, which can be chosen based on the design graph. The impact of loading resonators on the network is discussed. The diplexer can be easily realized by the combination of different bandpass filters without complicated tuning. To illustrate...
This paper proposes a compact bandpass filter with excellent out-of-band performance. Stepped-impedance resonators (SIRs) are used to achieve an extended rejection bandwidth. Loaded stubs are also introduced to suppress the harmonic responses. The SIRs and the loaded stubs take up little extra room, and thus the proposed filter has a compact size. In this paper, a bandpass filter centered at 2 GHz...
Compact quad-channel diplexer (2.5/3.5GHz and 3/4GHz) using meandering short stub loaded resonators is proposed. The quad-channel diplexer is composed of two pairs of coupled short stub loaded resonators to obtain independently controlled bandwidth at each passband and to reduce the circuit size. In addition, the mixed electric and magnetic coupling is employed to create a desired transmission zero...
This paper presents a dual-band bandstop filter by using stub-loaded resonators. The frequencies of the two stopbands are 1.6G and 2.4G, respectively, with the frequency ratio of 1.5. Several zero points are introduced, which significantly improve the skirt selectivity. The frequency ratio can be flexibly designed, and the fractional bandwidths of each stopband can be controlled conveniently. Moreover,...
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