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Radiofrequency rectifying circuit of double-frequency double-branch structure

A rectifier circuit and dual-branch technology, applied in the field of radio frequency rectifier circuits, can solve problems such as high load voltage and low input power, and achieve the effects of increasing output voltage, suppressing fundamental frequency, and improving integration.

Inactive Publication Date: 2017-02-22
SUN YAT SEN UNIV +1
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Problems solved by technology

In the application of wireless energy harvesting, it is often necessary to meet the requirements of low input power, high energy conversion efficiency, and high load voltage. It is difficult for existing rectifier circuits to meet the above requirements at the same time.

Method used

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  • Radiofrequency rectifying circuit of double-frequency double-branch structure
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  • Radiofrequency rectifying circuit of double-frequency double-branch structure

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Embodiment 1

[0036] The principle of the RF rectifier circuit with dual-frequency dual-branch structure is as follows: figure 1 As shown, a microstrip line with a characteristic impedance of 50 ohms is used as the signal input terminal, and is divided into a high-frequency branch and a low-frequency branch of 100 ohms. Both branches include a short-circuit stub matching network, a two-stage cascaded voltage doubler rectifier branch and a harmonic suppression branch. Since the matching networks of the two branches work in two different frequency bands, after the RF energy passes through the input end, the high-frequency energy mainly enters the high-frequency branch, and the low-frequency energy mainly enters the low-frequency branch. Harmonic suppression is required after two-stage cascaded voltage doubler rectification to filter out high-order harmonic components in the output voltage. The two-stage cascaded voltage doubling rectification of one branch produces four times the output volt...

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Abstract

The invention relates to a radiofrequency rectifying circuit of a double-frequency double-branch structure. The radiofrequency rectifying circuit comprises an input joint, a high-band branch and a low-band branch, wherein the high-band branch comprises a high-frequency impedance matching network, a high-frequency double-voltage rectifying branch and a high-frequency harmonic suppression branch; an input end of the high-frequency impedance matching network is connected with the input joint; an output end of the high-frequency impedance matching network is connected with an input end of the high-frequency double-voltage rectifying branch; an output end of the high-frequency double-voltage rectifying branch is connected with an input end of the high-frequency harmonic suppression branch; the low-band branch comprises a low-frequency impedance matching network, a low-frequency double-voltage rectifying branch and a low-frequency harmonic suppression branch; an input end of the low-frequency impedance matching network is connected with the input joint; an output end of the low-frequency impedance matching network is connected with an input end of the low-frequency double-voltage rectifying branch; and an output end of the low-frequency double-voltage rectifying branch is connected with an input end of the low-frequency harmonic suppression branch.

Description

technical field [0001] The invention relates to the field of wireless energy transmission, and more specifically, to a radio frequency rectification circuit with a dual-frequency dual-branch structure. Background technique [0002] Wireless power transmission (WPT) and space solar power generation system (SSPS) have improved the requirements for the application of microwave power transmission technology. The concept of wireless power transmission (WPT) was first proposed by Tesla as early as the beginning of the 20th century. Since then, wireless power transmission ( WPT) technology has been developed rapidly and widely used. [0003] In the field of wireless sensor networks and intelligence, radio frequency energy harvesting technology has become the key to solving energy source problems; radio frequency energy harvesting technology collects the surrounding electromagnetic waves and converts them into usable electrical energy for use by electronic devices. Therefore, RF en...

Claims

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Application Information

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IPC IPC(8): H02M7/10H02J5/00
CPCH02J5/005H02M7/10
Inventor 谭洪舟黎梓宏曾淼旺刘先泺李宇陈荣军
Owner SUN YAT SEN UNIV
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