Low power broadband rectifier with wide dynamic input power range for RFEH
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1.College of Information and Communication Engineering, Harbin Engineering University,Harbin 150001, China; 2.School of Electronic and Information Engineering, Anhui University,Hefei 230601, China

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TP2

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    Abstract:

    This paper proposes a broadband rectifier with wide dynamic input power range, which is mainly used in low input power condition. The proposed rectifier uses unidirectional conductivity of Schottky diodes and a parallel-type circuit topology for rectification. In the proposed structure, a broadband impedance matching network consisting of a twostage microstrip lines and a matching inductance are adopted to reduce the mismatch loss and achieve high radio frequency (RF) to DC power conversion efficiency (PCE) over the operating range, where the matching inductance is to offset the capacitance of the diode. The proposed rectifier is designed, optimized, simulated, fabricated and measured. The measured results agree well with the simulations. With an input power range of -1~10 dBm and a bandwidth of 1.8~2.8 GHz (fractional bandwidth of 43.4%), the PCE is greater than 50%. Besides, a peak PCE of 76.4% is obtained at an input power of 10 dBm. Comparing with previous similar work, this proposed rectifier operates at the lowest power level, making it amazing in the development of RF-harvesting.

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History
  • Received:
  • Revised:
  • Adopted:
  • Online: February 05,2024
  • Published: