TY - GEN

T1 - 2.4 GHz RF energy harvesting rectifier chip with harmonic backscattering detection capability

AU - Yang, Chiao Chieh

AU - Li, Dong Yan

AU - Huang, Tzuen His

PY - 2019/12

Y1 - 2019/12

N2 - In this paper, we design a 2.4 GHz RF energy harvesting rectifier chip which can be identified by a backscattering second-harmonic index signal. For the traditional RF energy harvester, the backscattered harmonic wave is often regarded as a loss part of available energy. Different from the traditional ones, we proposed a rectifier which is with a stronger backscattered harmonic when operated in location detection mode and followed with a better power conversion efficiency (PCE) in energy hunting mode. The energy harvesting rectifier has the maximum PCE up to 72% when the input power is-7.2 dBm and the output load is 10 mathrm{k} Omega. And the peak PCE is 60% with an input power of-19.4 dBm and an output load of 100 mathrm{k} Omega. The rectifier gives a sensitivity of-21.4 dBm for 1 V output voltage with a 10 mathrm{M} Omega probe load. When the input power is +5 dBm, the harvester can provide a 40 dB difference of second harmonic power between the above mentioned different modes for location detection. The effective input power range (IPR) is 14 dB which is defined as the power range limited by the PCE greater than 10% and the input power smaller than-10 dBm. We also newly proposed two figure of merit (FOM) expressions as the evaluation indexes of energy harvesting circuit performances.

AB - In this paper, we design a 2.4 GHz RF energy harvesting rectifier chip which can be identified by a backscattering second-harmonic index signal. For the traditional RF energy harvester, the backscattered harmonic wave is often regarded as a loss part of available energy. Different from the traditional ones, we proposed a rectifier which is with a stronger backscattered harmonic when operated in location detection mode and followed with a better power conversion efficiency (PCE) in energy hunting mode. The energy harvesting rectifier has the maximum PCE up to 72% when the input power is-7.2 dBm and the output load is 10 mathrm{k} Omega. And the peak PCE is 60% with an input power of-19.4 dBm and an output load of 100 mathrm{k} Omega. The rectifier gives a sensitivity of-21.4 dBm for 1 V output voltage with a 10 mathrm{M} Omega probe load. When the input power is +5 dBm, the harvester can provide a 40 dB difference of second harmonic power between the above mentioned different modes for location detection. The effective input power range (IPR) is 14 dB which is defined as the power range limited by the PCE greater than 10% and the input power smaller than-10 dBm. We also newly proposed two figure of merit (FOM) expressions as the evaluation indexes of energy harvesting circuit performances.

UR - http://www.scopus.com/inward/record.url?scp=85082985545&partnerID=8YFLogxK

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U2 - 10.1109/APMC46564.2019.9038289

DO - 10.1109/APMC46564.2019.9038289

M3 - Conference contribution

AN - SCOPUS:85082985545

T3 - Asia-Pacific Microwave Conference Proceedings, APMC

SP - 1688

EP - 1690

BT - Proceedings of the 2019 IEEE Asia-Pacific Microwave Conference, APMC 2019

PB - Institute of Electrical and Electronics Engineers Inc.

T2 - 2019 IEEE Asia-Pacific Microwave Conference, APMC 2019

Y2 - 10 December 2019 through 13 December 2019

ER -