Accession Number:

AD0258735

Title:

Modification of Standard Alford Loop Antenna for Use on Doppler Vor

Descriptive Note:

Corporate Author:

NATIONAL AVIATION FACILITIES EXPERIMENTAL CENTER ATLANTIC CITY NJ

Personal Author(s):

Report Date:

1961-02-01

Pagination or Media Count:

22.0

Abstract:

The standard Alford loops used in the Doppler VHF omnidirectional range VOR antenna array were modified and tests conducted to determine the reduction in parasitic current achieved as a result of the modification. It is concluded that the parasitic currents in the Alford loops of the Doppler VOR antenna array can be reduced appreciably by tuning the transmission line portions of the individual loops with a parallel plate capacitor. A further reduction in parasitic current can be effected by positioning the loops so that the transmission line crossovers are in line with the periphery of a circle through the centers of the loops and by alternating crossovers on either side of loop centers. Author

Subject Categories:

  • Electrical and Electronic Equipment
  • Underwater and Marine Navigation and Guidance

Distribution Statement:

APPROVED FOR PUBLIC RELEASE