Title :
Accurate modeling of dual dipole and slot elements used with photomixers for coherent terahertz output power
Author :
Duffy, Sean M. ; Verghese, S. ; McIntosh, K.A. ; Jackson, Andrew ; Gossard, A.C. ; Matsuura, S.
Author_Institution :
Lincoln Lab., MIT, Lexington, MA, USA
fDate :
6/1/2001 12:00:00 AM
Abstract :
Accurate circuit models derived from electromagnetic simulations have been used to fabricate photomixer sources with optimized high-impedance antennas. Output powers on the order of 1 μW were measured for various designs spanning 0.6-2.7 THz. The improvement in output power ranged from 3 to 10 dB over more conventionally designed photomixers using broad-band log-spiral antennas. Measured data on single dipoles, twin dipoles, and twin slots are in good agreement with the characteristics predicted by the design simulations
Keywords :
dipole antennas; equivalent circuits; photoconducting devices; slot antennas; submillimetre wave antennas; submillimetre wave mixers; 0.6 to 2.7 THz; 1 muW; coherent terahertz output power; design method; dual dipole antenna; dual slot antenna; electromagnetic simulation; equivalent circuit model; photomixer; Antenna measurements; Circuit simulation; Dipole antennas; Electromagnetic modeling; Gallium arsenide; Impedance; Optical design; Photoconductivity; Power generation; Switches;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
