Accession Number : ADD005243

Title :   Multiple Frequency Microstrip Antenna Assembly.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C

Personal Author(s) : Kaloi,Cyril M

Report Date : 14 Feb 1978

Pagination or Media Count : 11

Abstract : A very thin antenna assembly consisting of three electric microstrip antenna systems arrayed on a single dielectric substrate over a ground plane and tuned to three different frequency bands. The low physical profile of the antennas and the assembly hollow conformal arraying capability about an aircraft body without disrupting the aerodynamics of the vehicle. A phase difference of 90 deg between two elements of the UHF antenna system is used to obtain a wider bandwidth with good matching and also improves the radiation patterns of the array. Button type tuning capacitors in each of the elements of the UHF array permits compensation for variations in the center frequency of the UHF antenna system that are caused by the variation in the substrate dielectric constant, fabrication processes, etc. Also, close spacing of three antennas systems with minimum coupling is possible since most of the reactive energy from each antenna element is contained substantially within the volume bounded by the element and the portion of the ground plane beneath the element. (Author)

Descriptors :   *Patents, *Antenna arrays, *Assembly, Frequency, Dielectrics, Substrates, Conformal structures, Fuselages, Aerodynamics, Ultrahigh frequency

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE