RF-DC Converter Using Loss Compensation and Adaptive Matching Network

Yang, Kee Hoon; Oh, Seob; Kim, Jae Bin; Jo, Jong Wan; Lee, Kang-Yoon

doi:10.1109/isocc53507.2021.9613891

Cited by 1 publication

(1 citation statement)

References 2 publications

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“…Adaptive matching technologies are categorized as radio-frequency (RF) and power-electronics-based. For RF-based technology, the use of mechanical variable reactances [3] ,switching of reactance bank [3][4][5][6][7][8][9][10][11] and mechanical control of inductance [12] improves high-power handling but limits the upper frequency limit and size. Additionally, a varactor diode [13,14] , voltage variable capacitor [15][16][17], or negative impedance circuit [18] is widely used owing to its high-frequency capability, small size, and full electric control, but has poor high-power handling.…”

Section: Introductionmentioning

confidence: 99%

RF-DC conversion circuit using quadrature hybrid for complex maximum power point tracking

Tanahashi,

Hirayama

2024

IEICE Electron. Express

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This paper proposes the concept of a complex maximum power point tracking (MPPT) circuit for adaptive conjugate impedance matching of wireless power transfer. The proposed circuit consists of an orthogonal power distribution circuit using quadrature hybrid and two rectifier circuits and DC-DC converters. By controlling the input impedance of two DC-DC converters, the complex impedance of RF input can be varied to satisfy complex conjugate matching. This circuit enables high-power and high-frequency handling for matching circuits because no variable device is used in the RF region, and control is done in the DC region. Measurements at 433 MHz confirm that complex impedance in the RF region can be controlled by adjusting the two real impedances.

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