Accession Number : AD0005694


Title :   MEASUREMENT OF THE EFFECTIVE GAIN OF A RESONANT SLOT


Corporate Author : NORTHEASTERN UNIV BOSTON MA ELECTRONICS RESEARCH LAB


Personal Author(s) : Fagan, Peter


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/005694.pdf


Report Date : 10 Feb 1953


Pagination or Media Count : 46


Abstract : Research was conducted which indicates the agreement that can b e expected between theoretical predictions and several sets of carefully made experimental measurements. The estimated error in the experimental value of gain assigned to a thin lambda/2 resonant slot in a ground plane was + or - 0.3 db, and the assigned value of gain differed by less than 0.1 db from the theoretical value. The estimated error in gain assigned to a wave guide opening into a ground plane was + or - 0.5 db, and the assigned value differed from the theoretical value by less than 0.1 db. The amplitude of the periodic variation in received power caused by multiple scattering was considerably reduced by the use of absorbing cloth on the metallic parts behind the receiving horn. The results indicated the necessity for an averaging procedure to eliminate the effects of multiple scattering.


Descriptors :   *ANTENNA RADIATION PATTERNS , *SLOT ANTENNAS , EXPERIMENTAL DATA , OPENING(PROCESS) , PREDICTIONS , THEORY , WAVEGUIDES , ESTIMATES , VARIATIONS , ERRORS , GAIN , PARTS , SCATTERING , GROUND LEVEL , MEASUREMENT


Subject Categories : Radiofrequency Wave Propagation


Distribution Statement : APPROVED FOR PUBLIC RELEASE