Accession Number:

AD0758778

Title:

Theoretical and Experimental Studies of VLF and LF Waves

Descriptive Note:

Final scientific rept. 1 Jan-31 Dec 1972

Corporate Author:

INNSBRUCK UNIV (AUSTRIA) ELECTRONICS LAB

Personal Author(s):

Report Date:

1972-02-28

Pagination or Media Count:

162.0

Abstract:

The results of the research on the production, transmission and reception of VLF and LF waves is represented in 9 compact chapters. A new improved equivalent circuit diagram for the helix is calculated giving a good explanation of the measured effects over a large frequency range. The receiving characteristic of a ferrite rod antenna in the elliptically polarized field is investigated specifying a method that allows all ellipse parameters to be measured simultaneously. The phase measurement at VLF-wave propagation and the device built for this purpose are described and an improved universally usable digital phase measuring equipment for a large frequency range is particularized. The various pehnomena, e.g. reflection, refraction, and wave guiding, that are occurring at VLF and LF wave propagation are described and explained. A detailed description of a long-time registration of commercial VLF transmitters is given.

Subject Categories:

  • Radiofrequency Wave Propagation
  • Non-Radio Communications

Distribution Statement:

APPROVED FOR PUBLIC RELEASE