Abstract
In this paper, a high-efficiency rectifier based on a transmission-line transformer with wide input power and frequency ranges is presented. The proposed rectifier was configured with a voltage multiplier and transmission lines connected to each diode. Both the connected transmission lines were coupled and configured in the form of a transformer for a high Q-factor and low insertion loss. Further, the rectifier was optimized to match the source impedance for wide input power and frequency ranges. The size of the proposed rectifier was 34.4 mm × 12.8 mm, and its performance was verified through measurements. The proposed rectifier exhibited a high power conversion efficiency of over 70% in a wide frequency band of 2.0 GHz–2.8 GHz. The rectifier exhibited a power conversion efficiency of 50% or more in the power range of 4.6 dBm–22.8 dBm at a center frequency of 2.45 GHz.
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