A Triband Rectifier Toward Millimeter-Wave Frequencies for Energy Harvesting and Wireless Power-Transfer Applications

Abstract

This letter presents an efficient single-cell triband rectifier matched at millimeter-wave frequencies of 24, 28, and 38 GHz using a novel, compact multiband impedance matching network (IMN). The proposed multiband IMN is scalable and is used to design a miniaturized rectifier at the desired frequencies. The actual impedance of rectifier was measured using through-reflect-line (TRL) calibration for accurate design. A prototype of rectifier was realized on Rogers 5880 substrate. The rectifier is capable of harvesting dc output simultaneously from three different millimeter-wave frequency bands including two 5G communication bands and industrial, scientific and medical (ISM) band at 24 GHz. The maximum simulated efficiencies obtained at 24, 28, and 38 GHz are 44.3%, 42.7%, and 43.6% at an input power of about 15.6 dBm and the measured efficiencies are 44%, 41.3%, and 39.7% at an input power of 17.5 dBm, respectively. This rectifier finds its applications as an energy harvester and wireless power transmitter for self-sustainable low-power batteryless systems.