Design of high-efficiency microwave wireless power transmission system

Abstract

Microwave wireless power transmission (MWPT) is a new-style transmission mode, which has wide application on Space Solar Power Station (SSPS), Payload Spacecraft Module, high power weapon, and so on. Based on the requirement of space application, one MWPT system has been presented. The solid source provides microwave power. The diameter of transmitting paraboloid antenna is 2.4 m. The receiving antenna is an array rectenna, with the scale of 2.4 m*2.4 m. The transmission distance is 11 m. And the DC-to-DC transmission efficiency is better than 16.5%, which is admirably agreed with the estimation results. The experimental results could promote the theory studyengineering application conversion of MWPT technique.

Structure design and wireless transmission application of hybrid nanogenerators for swinging mechanical energy and solar energy harvesting

“…The former typically works under high-power conditions involving microwave and lasers, and can transmit energy up to several thousand meters with the use of expensive and high-precision equipment. 21,22 The operating mechanism of the near-field mode mainly includes resonant or non-resonant inductive coupling and capacitive coupling, [12][13][14][15][16][17][18][23][24][25][26][27] which is more suitable for inexpensive IoT applications. Although the transmission distance is relatively short, near-field wireless transmission has the advantages of low cost, flexible layout and simple construction, making it easily integrated with nanogenerators.…”

Design of a microwave power transmission demonstration system for space solar power station

“…They should be as small as possible. Recently, the ground experiment and demo systems of microwave power transmission (MPT) have been realized for SSPS application 14–15 . In summary, the system efficiency of existing MPT experiments is still low, which is far from practical applications demands, and the power density of the transmitted beam have not been seriously considered in these ground demo systems.…”

“…Recently, the ground experiment and demo systems of microwave power transmission (MPT) have been realized for SSPS application. [14][15] In summary, the system efficiency of existing MPT experiments is still low, which is far from practical applications demands, and the power density of the transmitted beam have not been seriously considered in these ground demo systems. According to URSI's views on SSPS and MPT, the recommended limit for the power density of the transmitted microwave beam center is about 23 mW/cm 2 in order to ensure atmosphere health and safety.…”

Conjunction of triboelectric nanogenerator with induction coils as wireless power sources and self-powered wireless sensors

“…The transmission range of these techniques is relatively short, and strongly depends on the size and shape of the “antenna” used. The far-field WPT technologies are typically based on microwaves 29 and lasers 30 etc. and are able to transmit power up to a few kilometers.…”