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In this paper, open-stub loaded resonator and short-stub loaded resonator are adopted to design a novel wideband diplexer and dual-band filter. To accelerate simulation speed, implicit space mapping method is firstly applied in multi-mode filter and diplexer design. To demonstrate it, a novel dual-band filter with central frequency at 1.8/2.5GHz and relative bandwidths of 16.7%/12%, and a diplexer...
A novel class of microstrip bandpass filters with increased upper rejection band is proposed. Coupling properties between the microstrip resonators and feed lines are analyzed via voltage-wave functions. Suppressions of second and third harmonics can be achieved by proper selection of coupling regions. Using two half-wavelength resonators with and without centrally-loaded resistors, two experimental...
In this letter, a compact dual-band (DB) bandpass filter based on parallel short-ended feed scheme is presented. Two sets of quarter-wavelength resonators operating at diverse frequencies are adopted to generate DB responses. A special feed scheme is proposed, which consists of two parallel short-ended strip branches. Each of them acts as a feed line of the respective resonator at one passband and...
A new design method of the repetitive control system for linear systems with time-varying norm-bounded uncertainties is presented, which can design a low-pass filter of the repetitive controller and a stabilizing controller simultaneously in the repetitive control system. Using a Lyapunov functional for the repetitive control system, sufficient conditions are derived in terms of a linear matrix inequality...
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