Method for sampling Tacan signal envelope

Details Method for sampling Tacan signal envelope Method for sampling Tacan signal envelope

1977-10-11

1979-03-06

Tubbesing, T.H.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

343 6R, G01S 144

Patent

active

041433769

ABSTRACT:
This invention relates to a method for supplying samples of the received signal envelope in airborne Tacan equipment to the airborne bearing circuitry. During the DME search phase, the airborne DME equipment searches for only those replies which have been received in response to the airborne equipment's own interrogations. After locking onto its own replies, said replies form the samples of the received signal envelope which are applied to a phase locked oscillator, the output of which is coupled to the bearing circuitry both before and after phase shifting. As a result, the airborne receiver duty cycle for Tacan functions is greatly reduced.

REFERENCES:
patent: 3167759 (1965-01-01), Villiers
patent: 3836864 (1974-09-01), Jezo

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