Communications: radio wave antennas – Antennas – Balanced doublet - centerfed
Patent
1957-09-05
1981-04-28
Hubler, Malcolm F.
Communications: radio wave antennas
Antennas
Balanced doublet - centerfed
G01S 738
Patent
active
042649099
ABSTRACT:
1. Means for searching across a frequency band and instantly stopping at any received frequency, comprising a detector, means for heterodyning said received frequency being connected to said detector, variable oscillator means, means for periodically varying said oscillator over a range of frequencies, means for injecting the frequencies of said oscillator in discrete steps into said heterodyning means, a pulse generator, a pulse-blocking bistable gate means coupling the output of said pulse generator to said oscillator means, pulse-shaping means associated with said detector to instantly form a pulse upon reception of said any received frequency, and means connecting the output of said pulse-shaping means to said gate means to open it in response to pulses from said pulse-shaping means, whereby the frequency variation of said oscillator means is discontinued and it provides a particular frequency in response to the output of said pulse-shaping means.
REFERENCES:
patent: 2369542 (1945-02-01), Dietrich
patent: 2537944 (1951-01-01), Colgan
patent: 2640150 (1953-05-01), Wu
patent: 2648063 (1953-08-01), Schmitt
patent: 2885543 (1959-05-01), Williams
Hamilton Alan R.
Tollefson Robert D.
Anderson Richard W.
Bachand Richard A.
Crawford Robert J.
Hubler Malcolm F.
Rockwell International Corporation
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