Active Integrated Empty SIW Cavity Backed Slot Antenna for Increased EIRP

In this paper, a novel active integrated antenna (AIA) is proposed with improved effective isotropic radiated power (EIRP). The antenna element is an empty substrate integrated waveguide (ESIW) cavity backed slot antenna to achieve excellent gain performance while having a very small antenna footprint. The antenna is integrated with a low phase noise feedback oscillator which oscillates at 11 GHz. The proposed AIA provides very high EIRP owing to the integration of a high gain antenna (∼9dBi) and the high RF power output (4.628 dBm) of the oscillator. The oscillator component has good DC to RF conversion efficiency of about 29%. The proposed AIA can be used for wireless power transfer and active wireless sensor tag or vital sign sensor designs.