Analyzer device for a VOR navigational receiver

Details Analyzer device for a VOR navigational receiver Analyzer device for a VOR navigational receiver

1975-05-05

1976-07-06

Wilbur, Maynard R.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

343107, G01S 144

Patent

active

039684946

ABSTRACT:
An analyzer device for VOR navigational receivers utilizes a first receiver section in which the reference phase, transmitted in the form of a frequency modulation, is available in demodulated form as reference signal, and a second receiver section in which the rotational phase, depending upon the particular direction of the antenna pattern, occurs in the form of an amplitude modulated rotating signal. Angular information in the azimuthal plane is obtained from a comparison of the reference phase with the rotational phase. In one of the two receiver sections a demodulated signal is applied to a frequency multiplier having a multiplication factor k, which is selected as a whole number multiple (k = 360.n) or as a fraction (k = 360 : n) of 360. The multiplied received signal is fed to a counter which converts the phase difference between the reference signal and the rotational into a corresponding number of counting increments which are displayed by a display device as the angular deviation from a reference direction.

REFERENCES:
patent: 3792473 (1974-02-01), Sawicki
patent: 3800125 (1974-03-01), Cleary, Jr.

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