Abstract: A microstrip antenna system having a GPS antenna for receiving GPS data and a telemetry antenna for transmitting telemetry data mounted on a dielectric substrate. The microstrip antenna system is designed for use on small diameter airborne projectiles which have a diameter of about 2.75 inches. A filter is integrated into the antenna system to isolate the transmitted telemetry signal from the received GPS signal.

Abstract: A one half wavelength microstrip antenna which has its structural feed po positioned in a location which is different from the location of its electrical feed point. The microstrip antenna comprises a disc-shaped dielectric which has a radiating patch mounted on its upper surface and a ground plane affixed to its lower surface. Attached to the bottom surface of the ground plane is a threaded coaxial cable connecter for receiving a coaxial cable which supplies a microwave signal to the microstrip antenna. Extending vertically upward from the connector is a center contact pin which electrically couples the antenna element to the coaxial cable. The antenna element includes a V-shaped element of etched copper which has its rounded bottom portion positioned adjacent the center contact pin.