DESIGN OF ANTENNAS FOR RECEPTION OF SIGNALS IN ADDITIVE NOISE FIELDS.
Abstract
The design of aperture antennas for the reception of signal fields in the presence of additive noise fields is considered. A gain expression is developed for the signal-to-noise power gain (referred to an isotropic point detector) for a plane circular aperture receiving the sum of independent, zero-mean, space and time stationary signal and additive noise fields. The design criterion is the maximization of the aperture gain with the aperture radius and amplitude weighting function as design parameters. In this approach to antenna design, the statistical properties of the signal and noise fields are considered. This represents a departure from classical antenna design theory which is based on the assumption of perfectly coherent fields. With uniform phase weighting and various types of amplitude weighting of the aperture, it is shown for certain signal/noise field combinations that optimum radii exist which maximize the aperture gain and for other combinations that the gain becomes essentially independent of aperture size for sufficiently large values of radius. This behavior is not predicted by classical antenna theory which specifies that apertures should be made as large as possible. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1968
- Accession Number
- AD0833302
Entities
People
- Clifton A. Calvez
Organizations
- Air Force Institute of Technology