A compact wireless passive sensing mechanism based on a seamlessly integrated resonator/antenna

Abstract

In this paper, a new wireless sensing mechanism is proposed based on the integration of a cavity resonator and a slot antenna. A compact structure can be achieved since this integration eliminates additional volume of the antenna and transition structure between the resonator and antenna. A resonator/antenna is demonstrated to verify the proposed technique. The resonator/antenna size is 14 by 13 by 3 mm. The resonant frequency of the resonator, i.e. 10.13 GHz, can be wirelessly detected at distances up to 55 mm. This approach can be useful in high-temperature wireless sensing applications where only passive sensors can survive.