Accession Number : ADP007442

Title :   A Center-Fed Planar Antenna Using A Surface/Leaky Wave,

Corporate Author : GTE GOVERNMENT SYSTEMS CORP NEEDHAM HEIGHTS MA COMMUNICATION SYSTEMS DIV

Personal Author(s) : Carrillo, S. ; Ladds, J.

Report Date : FEB 1992

Pagination or Media Count : 16

Abstract : A new type of leaky-wave planar antenna for millimeter-wave applications is described. This low cost antenna is an alternative to microstrip arrays for which the transmission line losses seriously limit gain. The circularly polarized antenna uses a surface wave to feed perturbations over a planar dielectric aperture and thus, is not subject to transmission line losses. Also, conventional leaky-wave antennas are side or end fed, which inherently leads to beam scanning as the frequency is varied. This is due to an asymmetrical phase distribution and is undesirable for communication antennas. By center-feeding, the phase is symmetrical and the aperture radiates a broadside beam, the direction of which is independent of frequency.

Descriptors :   *ANTENNAS, *MILLIMETER WAVES, APERTURES, ARRAYS, DIELECTRICS, DISTRIBUTION, FEEDING, FREQUENCY, GAIN, LOSSES, LOW COSTS, PERTURBATIONS, PHASE, SCANNING, SURFACE WAVES, SURFACES, TRANSMISSION LINES.

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE