Single pulse TOA measurement system

Details Single pulse TOA measurement system Single pulse TOA measurement system

1971-12-15

1976-02-03

Wilbur, Maynard R.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

343 16M, G01S 350

Patent

active

039368319

ABSTRACT:
A direction finding system which will provide, upon receipt of one single ectromagnetic pulse, the direction of the emitter which produced that pulse with repsect to a fixed reference. This is done by measuring the time between the arrival of the pulse at two antennae.
The basic time measurement may be made for example by charging a capacitor at a fast linear rate during the interim period between the arrival of the pulse front edges. The first pulse starts the charging of this capacitor and the second pulse stops it. The result is a fast rising ramp whose height is proportional to the time delay. To allow differentiation between signal arrival from the right and left side of the center line of the fixed reference, and assuming a base leg between antennas of 24 feet, a fixed delay at 25 nsec is added to channel B such that the B pulse always arrives after the pulse in channel A.

REFERENCES:
patent: 2489304 (1949-11-01), Marchand et al.
patent: 2535255 (1950-12-01), Barnes et al.
patent: 3383690 (1968-05-01), Keller

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