Communications: radio wave antennas – Antennas – Balanced doublet - centerfed
Patent
1980-06-18
1982-05-11
Tubbesing, T. H.
Communications: radio wave antennas
Antennas
Balanced doublet - centerfed
324 95, 333258, 343 171R, 357 30, G01S 1386
Patent
active
043296866
ABSTRACT:
Picosecond duration microwave pulses are generated used a laser activated semiconductor switch. High voltages are switched with picosecond rise time and result in the establishment of microwave pulses of frequency spectrum commensurate with the rise time of the voltage and wave guide parameters of a wave guide in which the switch is disposed. The activating light pulse is synchronous with the microwave pulse. A system, including an antenna and radar receiver, is responsive to the light pulse and return signals from a target on which the microwave pulse is incident. Reflection measurements of the microwave pulses from a body of semiconductor material which is optically excited by the light pulses relatively delayed between the generation of successive microwave pulses, indicate the duration of the microwave pulses.
REFERENCES:
patent: 3088113 (1963-04-01), Rosenthal
patent: 3917943 (1975-11-01), Auston
patent: 4218618 (1980-08-01), Mourou
Joseph M. Proud et al.; High Frequency Waveform Generation Using Optoelectronic Swithing in Silicon; IEEE Trans. on Microwave Theory & Technology; vol. MTT 26, No. 3, Mar. 1978, pp. 137-140.
Lukacher Martin
The University of Rochester
Tubbesing T. H.
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