Accession Number : AD0818631

Title :   RESONANT GRIDDED REFLECTOR OPTIMIZATION STUDY.

Descriptive Note : Final rept. 23 May 66-30 Jan 67.

Corporate Author : DORNE AND MARGOLIN INC WESTBURY NY

Report Date : MAY 1967

Pagination or Media Count : 290

Abstract : This report describes the work performed on a K-band gridded reflect-array (dipole elements). The theory of operation has been developed. This theory, corroborated by measurements, shows that the gridded reflectarray possesses certain limitations when the diameter exceeds several wavelengths. Notably, the aperture blocking by the peripheral elements becomes unduly large. Phase error also contributes to a loss in gain. A convenient four-dimensional phase error plot has been conceived and used, which yields even further insight into the operation of the gridded reflectarray. An alternate approach, using dipole layers to simulate a parabola has been evolved. Again the theory and measurements show this technique to be superior in gain and overall beamshape characteristics. This dish was tested alone, and by using it as the bottom feed in a flyswatter application, and was found to meet the project goals. Extensive use of IBM programming and computing services was made in studying the techniques applied to both approaches. (Author)

Descriptors :   (*ANTENNA ARRAYS, RESONANT FREQUENCY), K BAND, ANTENNA RADIATION PATTERNS, ANTENNA FEEDS, ANTENNA APERTURES, PHASE(ELECTRONICS), PARABOLIC ANTENNAS, DIPOLE ANTENNAS, COMPUTER PROGRAMMING, BACKSCATTERING.

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE