A multipurpose flush-mounted antenna system for satellite-land mobile communications and positioning

Abstract

An improved and compact design of an antenna system for full coverage of up to 15 degrees of elevation is presented. This system consists of a pair of antennas in microstrip technology (patch and ring), photoetched concentrically in the same substrate. A microstrip circuit is placed on the rear face. Its bandwidth, typical of microstrip radiators, makes it suitable for land-mobile communications. An interesting characteristic of this compact design is its versatility in supplying different coverage requirements including a positioning receiving output, if desired. The design problems and the experimental results both for the circuit elements and for the radiation pattern are discussed.<>