Wideband Front-End Integration and Unification of Circuit-Antenna for Simultaneous Stabilized Amplification and Steered Radiation

A wideband front-end integration of amplifying transistor within array antenna is proposed, analyzed and demonstrated in this paper, for simultaneous stabilized amplification and beam steered radiation, in a unified space. Source degeneration inductance realized through via is studied, from which appropriate via is utilized for stabilization. In addition, E-shaped patch antenna is used as the input matching network to enhance the impedance matching bandwidth, which also radiates. The prototype model is fabricated, and the measured results agree very well with simulated counterparts. This unified prototype has the amplification gain varying form 10 dB to 8 dB across the matching bandwidth of 13.5 %, along with beam steered radiation at +35°, observed from experiments. Furthermore, frequency tuning and related radiation performance realized through varying DC bias from measurements are also presented.