Requirements of Direction Finder Indicator and Determination of Correct Scanning Rates for DF Collector Systems in the VHF, UHF and SHF Bands
Abstract
This report contains an analysis of the operation of four (4) basic direction finding systems against signals in the VHF, UHF and SHF bands. In particular, the parameters which determine the correct d-f scanning rate are discussed for the case where the signal is pulsed and emanates from a rotating, directional antenna. The mathematical probability of obtaining a bearing against radar signals with different d-f systems is presented and examples of such calculations are given. It is shown that the probability of obtaining a bearing during on (1) sweep of a scanning radar transmitter increases as the d-f scanning rate is increased. It is also shown that the maximum usable d-f scanning rate is determined by the pulse repetition frequency of the received signal. The requirements and limitations of d-f indicators for use with the above systems against pulsed signals are discussed. It is found that proper design of the indicator circuits will minimize deficiencies and possible bearing errors.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 11, 1946
- Accession Number
- AD1193024
Entities
People
- E. H. Flath
- J. R. Gruber
Organizations
- United States Naval Research Laboratory