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A step-impedance transmission line compensation technique applying for parallel-coupled lines has been presented. With the closed-form design equations, the design procedure of the technique is greatly simplified. The simulated and experimental results validate the proposed technique. It is believed that the proposed couplers are suitable for use in many wireless and microwave applications.
A novel cross-coupled band-pass filter(BPF)based on the flute resonator is proposed in this paper. Due to the adoption of the same new configuration of coupling coefficient, the distance between the two loops is clearly shortened, which offers BPF an advantage of miniaturization. The configuration is characterized by a higher Q factor by introducing two transmission zeros in the transfer-function...
A dual passband filter using both microstrip and CPW resonators is proposed. The CPW resonators are embedded into the microstrip resonators to miniaturize the filter size. The cross coupling between the input and output resonators is introduced to exhibit a pair of transmission zeros in the two sides of the pass band, thus increasing the selectivity. An experiment has done for this filter, and the...
This paper presents a novel source/load multi-resonator coupling method with greater design flexibility for microstrip single mode coupled resonator filters. Source/load coupling with multiple resonators is useful for obtaining additional transmission zeros and high rejection at finite frequencies in the stopband. A narrow arm which is connected to the source or load and designed for obtaining the...
In this paper, the design of a compact planar bandpass filter above a defected ground plane is presented. The filter is designed as a combination of microstrip resonators and exploits the properties of a planar electromagnetic bandgap (EBG) structure patterned unto the ground plane of the printed circuit board material to provide a very wide stopband of up to 5 times the fundamental frequency. The...
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