Phase control based 2.45 GHz microwave power transmission system

A power transmission system, microwave technology, applied in the direction of electrical components, circuit devices, etc., can solve the problems of low efficiency, ignoring the transmission characteristics of microwaves in the air, etc., and achieve the effect of high integration and small volume

Active Publication Date: 2018-04-20
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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AI Technical Summary

Problems solved by technology

At present, the key factor why microwave wireless power transmission is difficult to achieve practical application is that the efficiency of the whole microwave wireless power transmission system is still relatively low.
The reason for the low efficiency is the propagation characteristics of microwaves in the air. At this stage, when companies and research institutes study how to improve the efficiency of microwave power transmission, they mainly focus on antenna technology, rectification technology and filter technology, etc., while ignoring Research on the transmission characteristics of microwaves in air

Method used

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  • Phase control based 2.45 GHz microwave power transmission system
  • Phase control based 2.45 GHz microwave power transmission system

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Embodiment Construction

[0010] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0011] The application principle of the present invention will be described in detail below in conjunction with the system block diagram.

[0012] The 2.45GHz closed-loop microwave power transmission system based on phase control includes: frequency source, power amplifier, power divider, microwave transmitting microstrip antenna, microwave receiving microstrip antenna, digital phase shifter, rectifier diode, low-pass input elliptic filter, output Filter, matching circuit, sampling circuit, controller, WIFI module.

[0013] In an embodiment of the present invention: the digital phase shifter adopts the MAPS-010164 chip of ...

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Abstract

The invention discloses a 2.45GHz closed loop microwave power transmission system based on phase control. The 2.45GHz microwave power transmission system comprises a microwave transmitting microstripantenna, a microwave receiving microstrip antenna, a digital phase shifter, a rectifier diode, a low-pass input elliptic filter, an output filter, a matching circuit, a sampling circuit, a controllerand a WIFI module, wherein a flexible board uses hair felt cloth; and the transmitting microstrip antenna and the receiving microstrip antenna of the 2.45GHz microwave power transmission system adoptlinear polarization rectangular microstrip antennas with the center frequency of 2.45 GHz, and feeding is realized in a microstrip line side feed manner. According to the system, the microwave phase is changed by controlling the digital phase shifter in an MPPT manner, and the directionality of microwave transmission is improved, so that more energy can be received by a microwave receiving antenna, and the transmission efficiency of the microwave power transmission system is improved. The efficiency of the microwave power transmission system can reach 70% at most.

Description

technical field [0001] The invention belongs to the technical field of microwave power transmission, and in particular relates to a 2.45GHz closed-loop microwave power transmission system based on phase control. Background technique [0002] As an important part of wireless power transmission, microwave power transmission is still in the laboratory research stage at home and abroad. At present, the key factor that microwave wireless power transmission is difficult to achieve practical application is that the efficiency of the whole microwave wireless power transmission system is still relatively low. The reason for the low efficiency is the propagation characteristics of microwaves in the air. At this stage, when companies and research institutes study how to improve the efficiency of microwave power transmission, they mainly focus on antenna technology, rectification technology and filter technology, etc., while ignoring Conduct research on the transmission characteristics...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J50/20H02J50/80
CPCH02J50/20H02J50/80
Inventor 李晓宁宫大为申世军
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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