Design method of electromagnetic energy far-field non-diffraction transmission system based on phased array
A design method and transmission system technology, applied in the direction of circuit devices, electrical components, etc., can solve the problem of insufficient transmission distance and achieve the effect of expanding the transmission distance of far-field focus
Active Publication Date: 2020-10-16
CHINA SHIP DEV & DESIGN CENT
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Problems solved by technology
However, the current traditional Gaussian electromagnetic wave wireless power transmission technology still has the bottleneck of insufficient transmission distance, and antenna array is a trend in the development of modern microwave or radio frequency systems
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[0035] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.
[0036] The design method of the electromagnetic energy far-field non-diffraction transmission system based on the phased array of the present invention comprises the following steps:
[0037] S1. Convert the spatial Gaussian distribution electromagnetic field from a Gaussian beam to a non-diffraction beam, and the electromagnetic wave of the non-diffraction-free beam (Diffraction-Free Beams) does not change along the propagation direction; according to the scalar wave equation (1) of the electromagnetic wave, in the Cartesian coordinate system It is assumed that the electromagnetic wave propagates along the z direction, if the field strength E(r, t) is separated into the form of multiplying the component along the z direction and the transverse component, that is, the field strength in the transverse component does not change with the component...
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The invention provides a design method of an electromagnetic energy far-field non-diffractive transmission system based on a phased array. The method comprises the steps that: a spatial Gaussian distributed electromagnetic field is converted from Gaussian beams into diffraction-free beams and the electromagnetic field of the electromagnetic wave of the diffraction-free beams does not change alonga propagation direction; a focus depth and a focus position change qualitatively since the electromagnetic field is converted from the Gaussian beams into the diffraction-free beams; based on an antenna interface of the phased array, a diffraction-free antenna region is formed, and electromagnetic energy focusing transmission is realized in a far field of electromagnetic energy by controlling thephase of the antenna surface. According to the method, a diffraction-free far-field focusing transmission scheme is achieved by using the phased array in a microwave frequency band for the first time,the far-field focusing transmission distance of the electromagnetic energy is greatly improved by controlling the phase of the antenna interface under the background that the size of the antenna interface is not changed, and the energy transmission distance is increased by more than 10 times compared with traditional Gaussian electromagnetic beams. Since the far-field diffraction-free focusing ofthe electromagnetic energy can be realized, it is expected to improve the electromagnetic energy power density by two orders of magnitude in a far field.
Description
technical field [0001] The invention belongs to the design field of high-power electromagnetic energy transmission system in the microwave frequency band, and in particular relates to a design method of a phased array-based electromagnetic energy far-field non-diffraction transmission system. Background technique [0002] Wireless power transfer technology includes two categories: non-radiative near-field coupling and radiative far-field transmission. Near-field wireless power transmission based on electromagnetic resonance coupling can only perform short-distance power transmission (about 2 meters) because the near-field itself is on the order of wavelength; wireless power transmission based on microwave transmission belongs to far-field With the advantage of performance, the transmission distance can reach the order of tens of meters or even thousands of meters. However, the current traditional Gaussian electromagnetic wave wireless power transmission technology still has...
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IPC IPC(8): H02J50/20H02J50/23
CPCH02J50/20H02J50/23
Inventor 肖龙谭辉刘其凤龚俊斌左宇王春
Owner CHINA SHIP DEV & DESIGN CENT