LF Field Measurements and Noise Suppression.
Abstract
Requirements toward the measurement of LF fields at TE and TM modes originating from a trailing wire antenna and received at a distant aircraft including means to suppress noise to permit discernibility of signals, are reported herein. Comparative field tests for the TE and TM modes indicate that the air-to-air long-range LF communication effectiveness can be significantly improved if the TE mode field is utilized at the receiver. The advantages obtainable from the TE mode field, however, cannot be fully realized unless the noise at the receiving antenna is suppressed from its normal level. Means to suppress 400 Hz harmonic noise, in general, and the use of the interference cancellation system in particular including experimental verification of its potential advantages, are outlined in the report.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1975
- Accession Number
- ADA016562
Entities
People
- Rabindra N. Ghose
- Walter A. Sauter