STUDY PROGRAM RELATED TO SHIPBOARD ANTENNA SYSTEM ENVIRONMENT
Abstract
Efforts concerned a study of the problems of shipboard radio interference and its reduction by antenna techniques. A serious shipboard problem is that of receiving weak signals while near-by antennas aboard the same vessel are transmitting at high power levels and coupling interference into the receiving system. One research approach to alleviate this situation has been directed toward examining antennas which would be inherently decoupled, such as traveling-wave antennas. A second approach has been to find an analytical formulation for the shipboard coupling problem from field theory. A third approach has been the introduction of a nulling signal to cancel the interference signal. Three decoupling techniques were investigated - covering the spectrum from the interior, confined type to the exterior, diffuse type. On the one extreme, a servo-controlled nulling loop system was devised and a prototype constructed. At the other extreme is the normal mode approach which views the entire ship and its environment as a network supporting modes which are orthogonal to one another.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 06, 1963
- Accession Number
- AD0464376
Entities
Organizations
- Ohio State University