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This paper presents the design and simulation of a novel fixed-tuned 310-350-GHz wide-band sub-harmonic mixer. The mixer is based on an anti-parallel pair of GaAs Schottky diodes fabricated at European company. The circuits are fully integrated with the RF/IF filter and flip-chipped onto a suspended quartz-based substrate. A best double-sideband-mixer loss of 5.7 dB was achieved with 5 mW of LO power...
A new bandpass filter (BPF) with a good frequency selectivity using lumped resistor-loaded element is proposed. The filter is composed of a parallel-coupled line shunted with a folded open-ended stub and a coupled line loaded with lumped resistor. The proposed filter has been designed, simulated, optimized for wireless communication system, and the obtained frequency responses have demonstrated a...
A novel and Compact folded-line band-stop filter is presented in this paper. A common design procedure is used to design the filter. The folded lines including microstip and coplanar waveguide (CPW) for obtaining the reduced physical dimensions are described. The filter design has been validated by using full-wave EM simulation. The 20-dB fractional bandwidth (FBW) is better than 50 % at the central...
A novel and compact dual-band bandpass filter (BPF) using microstrip/coplanar waveguide (CPW) composite structure is proposed. At the bottom of substrate material, the two CPW open-circuited resonators are broadside-coupled to the top microstrip transmission lines. The proposed dual-band filter has been simulated, optimized, and the obtained frequency responses demonstrated the filter with a good...
A novel low-pass filter (LPF) with harmonic-suppressed, sharp-rejection slop, wide and deep stop-band attenuation properties is proposed, which is composed of coplanar waveguide (CPW) short-circuited stubs and microstrip shunt open-end stubs as series and shunt components in the pass-band. Based on this composite microstrip/CPW structure, the low-pass filter with excellent electrical performances...
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