Development of a high-efficiency push-pull Class-D MOSFET power amplifier tailored for RFID applications
International Journal of Microwave and Wireless Technologies · 2026
Abstract. Class-D amplifiers offer significant potential for achieving efficient and high-power RF amplification. By converting the collector dissipation of conventional amplifiers into load power components and employing filtering to eliminate unwanted frequencies, Class-D amplifiers achieve superior overall efficiency. This study proposes and investigates a high-efficiency push-pull Class-D power amplifier integrated with a carefully designed matching network. A proof-of-concept circuit was designed and fabricated; operating within 7.7 to 8.7 MHz, the amplifier achieved a power-added efficiency of 89.26% and an output power of 49.54 dBm. The consistency between simulated and measured results underscores the reliability of the design and its suitability for wireless RFID applications.
- RF amplifiers
- Class-D
- Power electronics
- RFID
