Design of ellipsoidal reflector antennas for near-field RFID applications at UHF band

Abstract

This paper presents the design of an ellipsoidal reflector antenna for the RFID applications at UHF band, which can be potentially integrated with a dome-shape building structure. Due to the dual-focus radiation characteristics in the ellipsoid near-field region, the feed located at one of the two foci can create a focused field distribution around the other focus, which is located in the ground area covered by the dome. In this case, the radiated energy will be confined so minimizing the interference effects outside of the targeted area