Phase difference measurement technique for VOR

Details Phase difference measurement technique for VOR Phase difference measurement technique for VOR

1983-02-07

1986-01-28

Jordan, Charles T.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

343404, 343400, G01S 144

Patent

active

045674868

ABSTRACT:
A system and technique is disclosed which enables the derivation of phase difference measurements in a VOR system. In the phase difference measurement system, a reference VOR signal and a variable VOR signal are received and multiplied by locally generated sine and cosine signals. The multiplication produces two sine and two cosine signals at very low frequencies which are equal to the difference between the frequency of the received signals and the frequency of the locally generated sine and cosine signals. One sine signal and one cosine signal are shifted in phase relative to their counterparts by the phase difference between the variable and reference signals. These phase shifted signals may be multiplied with their counterparts to produce signals representing the sine and cosine of the phase difference between the variable and reference signal. Thereafter, the arc tangent of the sin/cos ratio is derived to produce a signal representing the phase difference or aircraft bearing.

REFERENCES:
patent: 3369238 (1968-02-01), Staufer
patent: 3435454 (1959-03-01), Vogt
patent: 3470557 (1969-09-01), Harries et al.
patent: 3523295 (1970-08-01), Perkins
patent: 3778601 (1973-12-01), Brock et al.
patent: 3792473 (1974-02-01), Sawicki
patent: 4132990 (1979-01-01), Di Domizio
patent: 4328548 (1982-05-01), Crow et al.

Affiliated with

Also associated with

Rating

Phase difference measurement technique for VOR does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Phase difference measurement technique for VOR, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Phase difference measurement technique for VOR will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1309173