Title :
A 140-170-GHz low-noise uniplanar subharmonic Schottky receiver
Author :
Gauthier, Gildas P. ; Raskin, Jean-Pierre ; Rebeiz, Gabriel M.
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., Michigan Univ., Ann Arbor, MI, USA
fDate :
8/1/2000 12:00:00 AM
Abstract :
A 150-GHz Schottky diode subharmonic receiver based on a coplanar-waveguide-fed double-folded-slot (DFS) antenna is presented in this paper. The DFS antenna is placed on an extended hemispherical high-resistivity silicon substrate lens to achieve a high directivity and a high coupling to a Gaussian beam efficiency. The uniplanar receiver results in a 12±0.5-dB measured double-sideband conversion loss at 144-152 GHz for a 8-10 mW local-oscillator power at 77 GHz, and has a wide-hand ⩽13-dB conversion loss over 30 GHz of bandwidth (140-170 GHz). The measured conversion loss includes silicon lens absorption and reflection losses, as well as IF mismatch losses. The applications are in new small aperture (7.5-cm lenses) collision-avoidance radars at 150 GHz
Keywords :
Schottky diode mixers; antenna feeds; collision avoidance; coplanar waveguides; directive antennas; millimetre wave antennas; millimetre wave receivers; road vehicle radar; slot antennas; 11.5 to 12.5 dB; 140 to 170 GHz; 30 GHz; 8 to 10 mW; Gaussian beam efficiency; IF mismatch losses; collision-avoidance radars; conversion loss; coplanar-waveguide-fed double-folded-slot antenna; directivity; double-sideband conversion loss; extended hemispherical high-resistivity substrate lens; local-oscillator power; uniplanar subharmonic Schottky receiver; Absorption; Antenna measurements; Bandwidth; Lenses; Loss measurement; Optical coupling; Power measurement; Receiving antennas; Schottky diodes; Silicon;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
