Title :
The CAA Doppler Omnirange
Author :
Anderson, S.R. ; Flint, R.B.
Author_Institution :
U. S. Dept. of Commerce, Civil Aeronautics Administration, Tech. Dev. Center, Indianapolis, Ind.
fDate :
5/1/1959 12:00:00 AM
Abstract :
This paper describes a VHF omnirange, the operation of which is based upon an application of the Doppler effect. Progress in the development of a Doppler VOR is outlined. The Doppler VOR has a measured 7-to-1 improvement with respect to siting effects when compared to the conventional four-loop VHF omnirange. The wave transmitted by the Doppler VOR is horizontally polarized. The unique interchange in the functions of the 30-cps amplitude modulation and the 30-cps frequency modulation of a 9.96-kc subcarrier is described. The Doppler VOR is shown to be compatible with present VHF omnirange receiving equipment. The results reported in this paper were obtained by experimentation and mathematical analysis.
Keywords :
Amplitude modulation; Apertures; Associate members; Computer aided analysis; Doppler effect; Frequency modulation; Mathematical analysis; Polarization; Reflection; Testing;
Journal_Title :
Proceedings of the IRE
DOI :
10.1109/JRPROC.1959.287274