APPLICATION OF ELECTROMAGNETIC ABSORBING MATERIALS AS INTERFERENCE REDUCTION TECHNIQUES.
Abstract
Means of controlling undesired radiation of antennas for reduction of radio frequency interference are given for three antennas: the horn, the parabola, and the Luneberg lens. The radiation mechanisms of each antenna are obtained and used as a guide line for this reduction. A new approach for finding the diffraction by thick edges has been developed and is used to determine the radiation patterns of horn antennas. It has been shown that back radiation for the horn may be reduced by reducing the energy incident on these edges. Choke joints have been used for this purpose, and are proposed as a method for increasing the effectiveness of shielding screens. A method is given for creating nulls in the Fresnel zone of an antenna by use of a small amount of absorber material. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1964
- Accession Number
- AD0600652
Entities
People
- Leon Peters Jr.
- Roger C. Rudduck
Organizations
- Ohio State University