Theoretical and Experimental Studies of VLF and LF Waves
Final scientific rept. 1 Jan-31 Dec 1972
INNSBRUCK UNIV (AUSTRIA) ELECTRONICS LAB
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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.
- Radiofrequency Wave Propagation
- Non-Radio Communications