Power management module for radio-frequency portable energy supply equipment

Abstract

The invention discloses a power management module for radio-frequency portable energy supply equipment, which comprises a multiband radio-frequency electric energy receiving circuit and a mode selector. The multiband radio-frequency electric energy receiving circuit is used for providing electric energy wide frequency range for a load circuit, and comprises a high-frequency receiving circuit, an ultrahigh-frequency receiving circuit and a microwave receiving circuit. Three input ends of the mode selector are connected with an output end of the high-frequency receiving circuit, an output end of the ultrahigh-frequency receiving circuit and an output end of the microwave receiving circuit. An output end of the mode selector is connected with the load circuit to transmit one of high-frequency wireless signal electric energy, ultrahigh-frequency wireless signal electric energy or microwave wireless signal electric energy to the load circuit. The portable electronic equipment can have the multiband radio-frequency electric energy receiving capacity within the wide frequency range by the aid of the power management module, the power management module can independently select out an optimal electric energy receiving mode to power the load, and accordingly voltage loss on a selection passage is reduced, and optimized power supply efficiency is realized.

Description

technical field [0001] The invention relates to a power management module of a portable device powered by radio frequency, in particular to a power management module of a portable electronic device which uses radio frequency power transmission to provide power. Background technique [0002] Recently, the development of wireless power transmission technology provides a new source of power for portable devices, which is more cost-effective, convenient and environmentally friendly than the solution powered by ordinary batteries. Portable electronic devices: consumer products such as radio frequency identification cards (RFID tags), wireless mice, medical products such as wireless ECG monitors (wireless ECG monitors), and cochlear implants have all achieved low-power designs, and these low-power portable devices Electronic devices provide a broad space for more RF-powered applications. [0003] RF power transmission for portable electronic devices can be divided into high-frequ...

AI Technical Summary

Problems solved by technology

[0008] The traditional voltage selector designed with diodes is not suitable for the work of the above-mentioned mode selector, because each diode has a PN junction forward voltage (0.7V), and it is noted that the ultra-high frequency receiving mode and microwave In the receiving mode, the electric energy received at the antenna end is usually relatively small, even if the output voltage is still in a relatively small range after the post-stage voltage doubler and rectification, if a PN junction conduction is subtracted from the current path through the mode selector The power management module may not be able to provide the normal working voltage required by the portable device, and it will also introduce waste of additional power consumption.

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