Accession Number : AD0270503

Title :   INTERACTIONS BETWEEN NESTED RHOMBIC ANTENNAS

Corporate Author : NATIONAL BUREAU OF STANDARDS BOULDER CO

Personal Author(s) : VIEZBICKE, P.P.

Report Date : 12 SEP 1961

Pagination or Media Count : 35

Abstract : Consideration was given to the operation of antennas in close proximity to one another. Mutual coupling between 2 nested rhombics and the effect of one rhombic on the radiation pattern of the other were measured. For a ratio of antenna sizes of 2 to 1, the presence of either a coplanar or non-coplanar antenna had no influence on the gain and radiation pattern of the reference rhombic. To determine the maximum acceptable separation, measurements were extended to include rhombics almost equal in size and as close as practicable to each other. For wire separations of 0.5 lambda, the gain of the reference rhombic was reduced by 0.5 db. For 0.2 lambda separation the gain was reduced by 1 db, and for 0.04 lambda, by approximately 4 db. Except for very close spacings, the radiation patterns remained substantially unchanged. (Author)

Descriptors :   *ANTENNAS, *COUPLED ANTENNAS, ANTENNA COMPONENTS, ANTENNA RADIATION PATTERNS, COMMUNICATION EQUIPMENT, COUPLINGS, HIGH FREQUENCY, MEASUREMENT.

Distribution Statement : APPROVED FOR PUBLIC RELEASE