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Based on stepped impedance resonator (SIR) and open stub loaded resonator structure, An ultra-wideband(UWB) bandpass filter is presented in this paper. A interdigital coupledline with four open stubs at the end has been used to control parasitic passband, which can ensure the frequencies of parasitic passband be away from the frequencies of ultra-wideband frequency. An X-slot is created to improve...
Based on stepped impedance resonator (SIR) and open stub loaded resonator structure, An ultra-wideband(UWB) bandpass filter is presented in this paper. A interdigital coupledline with four open stubs at the end has been used to control parasitic passband, which can ensure the frequencies of parasitic passband be away from the frequencies of ultra-wideband frequency. An X-slot is created to improve...
The Electromagnetic susceptibility (EMS) of cathode ray tube (CRT) display for computer was investigated preliminarily using the test method of bulk current injection (BCI). During the test, CW signals as electromagnetic interference (EMI) signals with different amplitude at a certain frequency were injected into the RGB, horizontal synchronization (HS) and vertical synchronization (VS) signal line...
Based on the theoretical formulation of the electromagnetic field distributions within a square patch resonator, an equivalent circuit and corresponding coupling model of the patch resonator for dual-mode filter operations are first constructed. Then, a circular hole (called as a perturbation element) etched on the patch itself with symmetric or antisymmetric to the excitation ports is studied. Further,...
An improved microstrip open-loop bandpass filter with controllable electric and magnetic mixed coupling is proposed. An additional transmission zero can be produced and precisely controlled by tuning electric and magnetic coupling parameters respectively. An equivalent circuit is used to analyze the behavior of the proposed filter. Simulated and measured results are in good agreement.
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