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In this paper, a 620–690GHz sub-harmonic mixer using monolithic GaAs integrated schottky diodes is presented in order to remove the mismatch caused by manual assembly of the flip chip diode. The monolithic microwave integrated circuit integrates a Schottky anti-parallel diodes pair in a longitudinal configuration. We mostly analyzed the influence caused by diode position offset and conductive adhesive...
This paper describes the planar schottky diode based subharmonic mixers currently being developed at the EHF Key Laboratory of Fundamental Science of Universtity of Electronic Science and Technology of China. Hybrid and integrated GaAs Schottky diode based 330GHz and 420GHz subharmonic mixers are designed, fabricated and measured. Test results show that the minimum conversion loss of 330GHz monolithic...
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...
In this paper, we use suspended microstrip to design a 0.33 THz fequency tripler, in which a pair of Schottky varactor chips parallel is adopted. Considering the present processing technology, it's easy for the unbalanced structure to provide bias to the diodes without an on-chip capacitor, which is essential to the balanced tripler scheme. The tripler consists of a waveguide housing, a pair of quartz...
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...
The letter presents a fourth-harmonic mixer based on planar schottky diode working at 330–500GHz. The result of simulation predicts that conversion loses well below 14dB from 369GHz to 477GHz with 6 dBm of local oscillator power. Therefore, the good performance of mixers in wide bandwidth and low conversion loss provides designers with a better choice.
This paper describes the design, simulation and measurement of a Schottky sub-harmonic mixer working around 370GHz. The device is based on an anti-parallel pair of planar Schottky diodes flip-chip mounted onto a single quartz-based microstrip circuit. The best DSB noise temperature of about 3500K is measured with LO at 184.5GHz. The performance of the mixer at room temperature and the liquid nitrogen...
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 simulation investigation of a low-loss fixed-tuned subharmonically pumped mixer at 300–350GHz, utilizing GaAs Schottky planar diodes. The antiparallel diodes pair is from Rutherford Appleton Laboratory (RAL), flip-chip mounted on a 50μm-thick suspended quartz substrate. The simulation performance of the mixer exhibits a conversion loss below 10 dB over the range from...
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