Title :
A 335 GHz quasi-optical Schottky receiver
Author :
Ali-Ahmad, Walid Y. ; Rebeiz, Gabriel M.
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., Michigan Univ., Ann Arbor, MI, USA
Abstract :
A quasi-optical Schottky receiver based on an integrated planar antenna-mixer structure has been developed and tested at 335 GHz. The receiver antenna is based on the quasi-integrated horn antenna with 23 dB directivity. At room temperature, the measured DSB antenna-mixer conversion loss and noise temperature at 335 GHz are 8.5 dB and 1750 K, respectively. This simple and tunerless design has a noise figure within 1 dB of the best tuned room temperature waveguide mixer using a similar planar GaAs Schottky diode.<>
Keywords :
Schottky-barrier diodes; antenna radiation patterns; horn antennas; microwave antennas; microwave imaging; mixers (circuits); submillimetre wave devices; 335 GHz; 8.5 dB; Au; DSB antenna-mixer conversion loss; GaAs; Si; SiO/sub 2/; integrated planar antenna-mixer structure; noise temperature; planar GaAs Schottky diode; quasi-integrated horn antenna; quasi-optical Schottky receiver; receiver antenna; submillimetre-wave imaging arrays; tunerless design; Antenna measurements; Horn antennas; Loss measurement; Noise figure; Noise measurement; Planar waveguides; Receiving antennas; Temperature measurement; Testing; Tuners;
Journal_Title :
Microwave and Guided Wave Letters, IEEE
