High Power Microwave Signal Generation Based on Recursive Balanced Power Amplifier

This paper presents a high-power microwave oscillator using recursive balanced amplification technique. The proposed architecture is configured by power amplifier (BPA) with class-AB operation and two feedback networks. Each circuit consists of phase shifter high-Q bandpass filter (BPF). BPA an input hybrid coupler (IHC) output (OHC) to divide recombine signals amplified through amplifiers (PAs) connected in parallel. outputs the OHC inputs IHC are form positive loop for oscillation. signal from each continuously alternately feedbacks IHC, resulting amplifications high was designed at 915 MHz measured 38.62 dBm. DC-to-RF conversion efficiency 44.43%. Furthermore, noises were -118.42 dBc/Hz -124 10 kHz 100 offsets, respectively.