Experimental Study of Ring-Slot Active Antenna Integrated With Transistor-Based Oscillators

This paper proposes a self-oscillating active antenna consisting of two transistor-based oscillators and a ring-slot antenna. The ring slot acts not only as an antenna but also as a common resonator of the two oscillators. The performance of the antenna is experimentally evaluated and compared with simulation results. Effective isotropic radiated power (EIRP) of 24.7dBm and transmitted power of 20.0dBm are achieved at 5.86GHz.