ISSN:
1089-7623
Source:
AIP Digital Archive
Topics:
Physics
,
Electrical Engineering, Measurement and Control Technology
Notes:
Moderate pulse reflectometry requires the efficient (low loss) gating/switching (∼100–300 ps rise times) of millimeter wave pulses with a high on/off contrast ratio. To satisfy this need, high speed switches utilizing beam control array technology are under development at U.C. Davis. A quasioptical planar grid switch array comprised of hundreds of Schottky varactor diodes embedded within an overmoded waveguide, is capable of generating the requisite 100–300 ps switching times with Watt-level power handling capabilities. A proof-of-principle, high speed V-band switch array has been constructed with excellent agreement between theory and experiment. Less than 1.6 dB insertion loss and 〉16 dB on/off contrast ratio are measured at 61.5 GHz, with rise and fall times of 〈127 ps. An instantaneous bandwidth 〉7 GHz (contrast ratio 〉15 dB) has also been measured. A discussion will also be presented on designs at frequencies up to 170 GHz. © 1999 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.1149455
