Communications: radio wave antennas – Antennas – Balanced doublet - centerfed
Patent
1977-05-26
1978-08-15
Farley, Richard A.
Communications: radio wave antennas
Antennas
Balanced doublet - centerfed
343 14, 343 5DP, 343 177, G01S 928
Patent
active
041076818
ABSTRACT:
Method and apparatus for automatically adjusting the resolution of a CWFM radio altimeter includes a counter for counting a signal produced by the altimeter having a period relatable to the altitude desired to be measured. Another counter counts the number of pulses of a time reference signal occurring over a predetermined number of periods of the altitude related signal. The number of periods of the altitude related signal over which the time-reference-signal pulses are counted is automatically determined by a circuit responsive to the fullness of the time-reference-signal pulse counter to produce a signal after the counter has reached a predetermined count. The next occurring multiple of the altitude related signal is then determined, and the number of time-reference-signal pulses then counted is divided by the number of the multiple found.
In a particular embodiment, the counters are binary counters, and the multiples determined are powers of 2, whereby the division is achieved by shifting the data in shift registers a number of places corresponding to the number of multiples of 2.sup.N found.
Robertson Roy E.
Weber Robert J.
Bachand Richard A.
Farley Richard A.
Goodwin Lawrence
Hamann H. F.
Rockwell International Corporation
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