Accession Number : AD0629108

Title :   ERROR ANALYSIS OF FRESNEL-RING FOCUSING.

Descriptive Note : Final rept.,

Corporate Author : MELPAR INC FALLS CHURCH VA

Personal Author(s) : Murphy,A. P.

Report Date : FEB 1966

Pagination or Media Count : 67

Abstract : A general end-fire array design technique (called Fresnel-ring focusing) for direct extrapolation of far-field data from near-field data has been analyzed with regard to systematic and random errors. Criteria are developed for sufficiency of the Fresnel approximation with arbitrary array design, array element gain, and the restrictions of mutual coupling that demonstrate feasibility of the technique for a practical problem. Consideration is given to focusing processes and types of optimization synthesis. Array optimization is achieved by design variation to minimize random errors. The end-fire array designs attained have 'super-gain' properties that make the technique impractical. (Author)

Descriptors :   (*ANTENNA RADIATION PATTERNS, MEASUREMENT), ERRORS, FIELD THEORY, FOCUSING, OPTIMIZATION, SYNTHESIS

Subject Categories : Electrical and Electronic Equipment
      Radiofrequency Wave Propagation

Distribution Statement : APPROVED FOR PUBLIC RELEASE