Accession Number : AD0276888

Title :   THE DIELECTRIC PLATE ANTENNA

Corporate Author : ARMY ELECTRONICS LABS FORT MONMOUTH N J

Personal Author(s) : WAGNER,RUSSELL J. JR.

Report Date : JAN 1962

Pagination or Media Count : 1

Abstract : A flat dielectric plate placed in front of an antenna aperture increases the power gain of the aperture without increasing the physical area. The gain can be further increased by moving a single or double dielectric plate array graduallyAWAY FROM THE APERTURE. Polystyrene and Eccofoam dielectric plates varying in thickness were used in experiments to determine which plate or combination of plates, placed at different spacings before an aperture, would produce the greatest gain. Measurements were made over the frequency range of 8000 to 8500 mc. Eccofoam plates (dielectric constant, 5.0) were found to give greater power gains than polystyrene plates (dielectric constant, 2.55). Best results were obtained from an array comprised of two Eccofoam plates 1/4-in. and 5/16-in. thick at spacings of 1-1/2 and 2-1/4 in. from the aperture. Information derived from these experiments was given practical application in the construction and testing of a low-silhouette antenna. (Author)

Descriptors :   *ANTENNAS, *PARABOLIC ANTENNAS, *RADAR ANTENNAS, ANTENNA RADIATION PATTERNS, COMMUNICATION EQUIPMENT, DIELECTRICS, EXPANDED PLASTICS, MEASUREMENT, PLASTICS, POLYMERS, RADIOFREQUENCY POWER, SHEETS, STANDING WAVE RATIOS, STYRENES, SUPERHIGH FREQUENCY, X BAND

Distribution Statement : APPROVED FOR PUBLIC RELEASE