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Unlike conventional filters and antennas that are separated, a filtering antenna with 3rd-order Chebyshev response is presented in this paper. At first, a 3rd-order Chebyshev bandpass filter is designed by utilizing coupling matrix. Then, an aperture is etched on the narrow wall of the last resonator of the filter for energy radiation. As demonstration, an example of the filtering antenna with center...
In this paper, a bandpass filter with good suppression of both the second and third harmonic is designed and implemented. To reduce the size of the filter, quarter-wavelength stepped-impedance resonator (SIR) is used, the filter consists of four SIR resonators and a narrow line between the two resonators in the middle. One transmission zero is introduced in the upper stopband by mixed electric and...
In this paper, a novel ultra-wideband (UWB) bandpass filter (BPF) with excellent passband performance and skirt selectivity is designed and fabricated. The proposed UWB filter consists of dual symmetric multiple-mode resonators (MMRs) and four defected ground structures. Six modes, including three odd modes and three even modes, could be designed within UWB band, and two transmission zeros are at...
In this paper, a compact quarter-wavelength stepped-impedance resonator bandpass filter is proposed, two extra transmission zeros are implemented by source-load coupling between the feedlines, a filter with two resonators is designed, each resonator consists of a low-Z section and a high-Z section, good performance is achieved both in passband and stopband. Demonstrator filter is designed on the Rogers...
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