Jianpeng Wang

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A class of wideband microstrip-to-microstrip vertical transitions is proposed via multiresonant modes in a slotline resonator formed on their common ground plane. The slot acts as a multimode resonator with microstrip lines at its two sides as the input and output terminals. Multiresonant modes in this slotline resonator can be properly excited by setting a(More)
A new microstrip ultra-wideband (UWB) bandpass filter (BPF) with dual sharply rejected notched bands based on E-shaped resonator is proposed in this letter. The basic UWB BPF is designed using interdigital coupled lines and rectangular patch multiple-mode resonator (MMR). Then, the resonance properties of the E-shaped resonator are studied. The analyzed(More)
—A new microstrip ultra-wideband (UWB) bandpass filter (BPF) with triple-notched bands is presented in this paper. The circuit topology and its corresponding electrical parameters of the initial microstrip UWB BPF are desired by a variation of genetic algorithm (VGA). Then, triple-notched bands inside the UWB passband are implemented by coupling a square(More)
A comprehensive study of a new planar-type balun prototype is presented in this paper for application in the design of balun bandpass filters (BPFs) with widely used open-type resonators. The proposed balun is in general composed of two identical back-to-back quarter-wavelength (λ/4) coupled line sections. The design concept originates from the(More)
An in-line feed-line configuration for design microstrip dual-mode triangular patch resonator bandpass filters (BPFs) is presented in this paper. By properly arranging the feed-line positions, it generates two or four transmission zeros adjacent to cutoff frequencies of the passband, which improves the selectivity. The computed current distributions of a(More)
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