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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...
In this paper, A simple Ultra-Wide band filter with Notch bang using SIR and Three parallel lines is presented. Input and output ports are parallel three lines for signal transmission. DGS (Defected Ground Structure) is well suited for the design SoP microwave passive components and interconnect in the new microwave integrated technology. In order to increase the coupling strength of the signal in...
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...
In this paper, A simple Ultra-Wide band filter with Notch bang using SIR and Three parallel lines is presented. Input and output ports are parallel three lines for signal transmission. DGS (Defected Ground Structure) is well suited for the design SoP microwave passive components and interconnect in the new microwave integrated technology. In order to increase the coupling strength of the signal in...
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.
An improved group delay method for the tuning of microwave filters is introduced. This method is based on the group-delay values of reflection coefficients. Measuring the group delay of reflection coefficients synthesizes all the couplings and resonant frequencies. This method requires successive trials to achieve synchronous tuning of n/2 (n=the degree of the filter, if n is odd, the tuned number...
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