Title :
Design of a broadband sub-harmonic mixer using planar Schottky diodes at 330 GHz
Author :
Thomas, B. ; Maestrini, A. ; Beaudin, G.
Author_Institution :
LERMA, Obs. de Paris, France
fDate :
27 Sept.-1 Oct. 2004
Abstract :
The design of a broadband fix-tuned 330 GHz sub-harmonic mixer is presented. The possibility to model accurately the hot electron noise of Schottky diodes using Agilent ADS software suite has been investigated. The circuit uses an anti-parallel pair of Schottky diodes fabricated by the University of Virginia and flip-chipped on a suspended microstrip filter. The circuit is mounted in a split-block that includes a Pickett feedhorn. At room temperature, the mixer performances were measured in the band 300-360 GHz with conversion losses of 6.5 dB and DSB noise temperature below 800 K with a local oscillator power ranging from 2.5 to 4 mW. Best performances were obtained at 330 GHz with a DSB mixer noise temperature of 650 K.
Keywords :
Schottky diode mixers; circuit simulation; flip-chip devices; microstrip filters; semiconductor device noise; submillimetre wave mixers; waveguide antennas; 2.5 to 4 mW; 293 to 298 K; 300 to 360 GHz; 6.5 dB; 650 K; Agilent ADS software; DSB mixer; Pickett feedhorn; University of Virginia; antiparallel pair; broadband sub-harmonic mixer; flip-chip; hot electron noise; local oscillator; planar Schottky diodes; room temperature; suspended microstrip filter; Circuit noise; Electrons; Local oscillators; Loss measurement; Microstrip filters; Noise measurement; Performance evaluation; Power measurement; Schottky diodes; Temperature distribution;
Conference_Titel :
Infrared and Millimeter Waves, 2004 and 12th International Conference on Terahertz Electronics, 2004. Conference Digest of the 2004 Joint 29th International Conference on
Print_ISBN :
0-7803-8490-3
DOI :
10.1109/ICIMW.2004.1422161
