Active Q factor improvement of microstrip antenna

With recent developments in microwave communications, a great attention has been paid to “Active Microstrip Antennas”. For some specific applications, such as “Oscillating Active Integrated Antenna”, an active device functions as oscillator and the antenna plays the role of a resonator. Furthermore, the whole system coupled to another oscillating circuit presents better Q-factor qualifications. In this paper we present antenna application of active Q factor improvement by “Active Loop Method” which has been used to develop microwave active filters