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Proceedings Paper

Time-domain analysis of sub-micron transit region GaAs Gunn diodes for use in terahertz frequency multiplication chains
Author(s): F. Amir; N. Farrington; C. Mitchell; M. Missous
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Paper Abstract

Simulated RF time-domain characteristics for advanced Gunn diodes with hot electron injection and sub-micron transit region lengths for use at frequencies over 100GHz are reported. The physical models used have been developed in SILVACO and are compared to measured results. The devices measured were originally fabricated to investigate the feasibility of GaAs Gunn diode oscillators capable of operating at D-band frequencies and ultimately intended for use in high power (multi-mW) Terahertz sources (~0.6THz) when used in conjunction with novel Schottky diode frequency multiplier technology. The device models created using SILVACO are described and the DC and time-domain results presented. The simulations were used to determine the shortest transit region length capable of producing sustained oscillation. The operation of resonant disk second harmonic Gunn diode oscillators is also discussed and accurate electromagnetic models created using Ansoft High Frequency Structure Simulator presented. Novel methods for combining small-signal frequency-domain electromagnetic simulations with time-domain device simulations in order to account for the significant interactions between the diode and oscillator circuit are described.

Paper Details

Date Published: 20 October 2010
PDF: 15 pages
Proc. SPIE 7837, Millimetre Wave and Terahertz Sensors and Technology III, 783702 (20 October 2010); doi: 10.1117/12.864872
Show Author Affiliations
F. Amir, The Univ. of Manchester (United Kingdom)
N. Farrington, e2v Technologies Plc (United Kingdom)
C. Mitchell, The Univ. of Manchester (United Kingdom)
M. Missous, The Univ. of Manchester (United Kingdom)

Published in SPIE Proceedings Vol. 7837:
Millimetre Wave and Terahertz Sensors and Technology III
Keith A. Krapels; Neil A. Salmon, Editor(s)

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