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An integrated design of a band-pass filter and a patch antenna is proposed in this paper by using an aperture coupled structure. Traditionally, the microwave filter and antenna are designed separately using 50 Ohm interface and then connected by transmission lines, which lead to a large size and more loss. Here, the antenna and microwave filter are directly integrated without a 50 Ohm interface between...
A novel dual-band bandpass filter with large bandwidth ratio is proposed by using two dual-mode square ring resonators. By stretching the length of the loaded open stub of the inner ring, one of its first-order degenerate modes moves down and forms the first passband together with a pair of first-order degenerate modes of the outer ring resonator. Meanwhile, the second passband is constructed by another...
A compact ultra-wideband (UWB) filter is designed by a proposed stepped impedance dual-mode resonator. The dual-mode resonator is formed by adjusting the impedance ratio. There are four resonant modes inside pass-band of the novel filter, two of which are generated by dual-mode resonator and the other two modes are produced by parallel-coupled feed lines. This results in the formulation of the novel...
A compact dual-band bandpass filter is presented for wireless LAN applications. Using two centrally-loaded stepped-impedance resonators, the second passband frequency can be conveniently tuned. Two transmission zeros are generated between the two passbands because of source-loading coupling topology. Simulated results show that two central frequencies are located at desired 2.4 and 5.7 GHz with 3...
In this paper, microstrip line with fractal Cantor distributing substrates is investigated. Transmission matrix method is used to calculating the transmittance and reflectance. Comparing with periodic distributing substrates, microstrip line with fractal Cantor distribution shows sharp resonances inside gap. The resonances in somewhere split and form more peaks with increasing of the number of generation...
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