Title :
Millimeter-wave diode-grid frequency doubler
Author :
Jou, Christina F. ; Lam, Wayne W. ; Chen, Howard Z. ; Stolt, Kjell S. ; Luhmann, Neville C., Jr. ; Rutledge, David B.
Author_Institution :
Dept. of Electr. Eng., California Univ., Los Angeles, CA, USA
fDate :
11/1/1988 12:00:00 AM
Abstract :
Monolithic diode grid were fabricated on 2-cm2 gallium-arsenide wafers in a proof-of-principle test of a quasi-optical varactor millimeter-wave frequency multiplier array concept. An equivalent circuit model based on a transmission-line analysis of plane wave illumination was applied to predict the array performance. The doubler experiments were performed under far-field illumination conditions. A second-harmonic conversion efficiency of 9.5% and output powers of 0.5 W were achieved at 66 GHz when the diode grid was pumped with a pulsed source at 33 GHz. This grid had 760 Schottky-barrier varactor diodes. The average series resistance was 27 Ω, the minimum capacitance was 18 fF at a reverse breakdown voltage of -3 V. The measurements indicate that the diode grid is a feasible device for generating watt-level powers at millimeter frequencies and that substantial improvement is possible by improving the diode breakdown voltage
Keywords :
Schottky-barrier diodes; equivalent circuits; frequency multipliers; solid-state microwave circuits; varactors; -3 V; 0.5 W; 18 fF; 27 ohm; 66 GHz; 9.5 percent; EHF; GeAs; MM-wave type; Schottky-barrier varactor diodes; average series resistance; diode-grid; equivalent circuit model; far-field illumination conditions; frequency doubler; microwave circuits; millimeter-wave frequency multiplier array; minimum capacitance; plane wave illumination; pulsed source pumping; quasi-optical type; quasioptical type; reverse breakdown voltage; second-harmonic conversion efficiency; semiconductor wafer; transmission-line analysis; watt-level powers; Circuit testing; Equivalent circuits; Frequency; Gallium arsenide; Lighting; Millimeter wave circuits; Power generation; Schottky diodes; Semiconductor device modeling; Varactors;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
