Frequency-adaptive radio frequency energy rectifier

Abstract

The invention relates to a frequency-adaptive radio frequency energy rectifier comprising a matching network module, an N-stage cross coupling main rectifier and an N-stage auxiliary rectifier which are connected. The N-stage cross coupling main rectifier is connected with an analog amplifier, a signal output end of the analog amplifier is connected with a cathode input end of a high-speed comparator, an output end of the N-stage auxiliary rectifier is connected with one end of a resistor R1, the other end of the resistor R1 is connected with a cathode, a point where the other end of the resistor R1 is connected with the cathode is connected with a grid electrode of a transistor M1, an anode of a diode D1 is in short connection with a source electrode of the transistor M1 and is grounded, a drain electrode of the transistor M1 is connected with an anode input end of the high-speed comparator, an output end of the high-speed comparator is connected with a variable capacitor in the matching network module, and the high-speed comparator is connected with a reference voltage generator. By the above technical scheme, radio frequency-direct current conversion performance of the radio frequency rectifier can be stabilized effectively, the frequency-adaptive radio frequency energy rectifier can be widely applied to wideband radio frequency energy collection and application occasions.

Description

technical field [0001] The invention relates to the field of current conversion equipment, in particular to a frequency adaptive radio frequency energy rectifier. Background technique [0002] Previous traditional RF energy rectifiers, no matter active rectifier (ARC), voltage sampling active rectifier (VAR), or multi-stage Dickson charge pump rectifier, have no frequency adaptive function. For broadband RF energy harvesting applications, such as body area network (WBAN), WiFi, etc., it is necessary to collect RF energy with a frequency range of 350MHz to 3GHz, and the change of the frequency of the RF signal will cause a large change in the performance of the rectifier , resulting in instability of the RF-DC conversion. The instability of DC voltage obtained by traditional RF energy rectifiers will directly affect the normal operation of devices in communication nodes. Therefore, the adaptive matching circuit has become an urgently needed functional module for current rad...

AI Technical Summary

Problems solved by technology

For broadband RF energy harvesting applications, such as body area network (WBAN), WiFi, etc., it is necessary to collect RF energy with a frequency range of 350MHz to 3GHz, and the change of the frequency of the RF signal will cause a large change in the performance of the rectifier , causing RF-DC conversion instability

The instability of DC voltage obtained by traditional RF energy rectifiers will directly affect the normal operation of devices in communication nodes

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