Bo Zhang, Yong Fan, X. Yang, F. Zhong, Zhe Chen, S. Zhang, X. Q. Lin, K. Song
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The design of a 310–350-GHz sub-harmonic mixer with planar schottky diodes
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 5.7dB was achieved with 5mW of LO power at 332GHz. Over an RF band of 310350GHz, the double-sideband loss is below 11dB. This state-of-the-art optimization is attributed to lower parasitic devices and a low-loss waveguide circuit.
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