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This letter presents the design of a wide band 8th harmonic mixer, using an anti-parallel pair of planar Schottky GaAs flipp-chip diodes fabricated onto a suspended quartz-based microstrip circuit. Simulations predict conversion losses are well below 23dB from 330 to 500GHz. The design offers an solution to simplify the local oscillator signal generation and realize the goal of low frequency conversion...
This paper presents the design and simulation investigation of a 850GHz low-loss subharmonical mixer based on GaAs Schottky barrier diodes. Our group analyzed the topology of subharmonic mixer, device modeling of Schottky diodes, the 3D electromagnetic passive circuits and the mixer circuitry with optimum performance. The antiparallel diodes pair is fabricated from China Electronics Technology Group...
Terahertz electromagnetic radiation (from 0.1THz to 10THz) that lies in the boundary region between light and radio waves has attracted much attention in recent years due to its certain extraordinary properties. This paper presents the design and simulation investigation of a 0.66THz low-loss subharmonical mixer based on GaAs Schottky barrier diodes. The antiparallel diodes pair is fabricated from...
In this paper, a terahertz wideband sub-harmonic mixer based on the Schottky anti-parallel diodes pair and MASTER technology is presented. The mixer circuit is fabricated on a 0.05mm quartz substrate including Schottky anti-parallel diodes pair, RF/LO transition, IF matching networks and filtering circuits. The diode circuit is fabricated on a quartz substrate directly by MASTER technology. The research...
The paper presents the design and fabrication of a low-loss fixed-tuned 118 GHz subharmonically pumped mixer, using commercially available GaAs Schottky barrier diodes flip-chipped onto a suspended microstrip circuit. The simulation performance of the mixer exhibits a double side band (DSB) conversion loss below 10 dB over the range of 113-123-GHz, with 6 mW of local oscillator (LO) power. At 118...
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...
This paper presents a band-stop tunable filter (BSF) within frequency ranges of 7-13.5GHz and it shows good stop rejection and sharp roll off frequency. It used a novel design to turn the resonant frequency by microelectromechanical systems (MEMS) switch and coplanar-waveguide (CPW) structures. The DC voltage is utilized to load RF-MEMS switch as source of the tunable cell's power. This paper also...
This paper presents the optimization and design of a low-loss fixed-tuned 215-235-GHz sub-harmonic mixer, pumped by planar GaAs Schottky diodes fabricated by European company for space-borne radiometers. The circuits are fully integrated with the RF/IF filter and flip-chipped onto a suspended quartz-based substrate. The GaAs Gunn oscillator is used as the local-oscillator (LO) and this paper also...
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