Miniaturized low-frequency magnetic annular moment near magnetic field focusing magnifying lens
A technology of magnifying lens and near magnetic field, applied in antennas, electrical components, etc., can solve the problems of complex structure of ring dipole, attenuation with distance, near magnetic field divergence, etc., to solve the problem of Joule and radiation loss, and small Joule heat loss , the effect of minimizing loss
Pending Publication Date: 2017-05-24
SOUTH CHINA UNIV OF TECH
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Problems solved by technology
[0002] In the prior art, the medical magnetic hardware system is still in the stage of physical experiments. The key problems are: near magnetic field divergence, insufficient field strength, and rapid attenuation with distance, such as medical imaging treatment, insufficient target tissue strength, depth, and normal tissue damage
Unlike electric dipoles and magnetic dipoles, although ring dipoles are also a basic electromagnetic response, the composition of ring dipoles is much more complicated than that of electric dipoles and magnetic dipoles
However, due to the weak electromagnetic response of ring dipoles, which are usually masked by electric or magnetic dipoles, they have been neglected for a long time.
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[0028] like figure 2 As shown, a miniaturized low-frequency magnetic ring moment near-field focusing magnifying lens is characterized in that it includes an odd number of metamaterial units, the odd number is greater than 1, and the odd number of metamaterial units are arranged asymmetrically, using plane wave excitation, The direction of the wave, the direction of the electric field and the direction of the magnetic field are perpendicular to each other.
[0029] like figure 1 As shown, the metamaterial unit includes a dielectric substrate 4, and a four-armed helical structure 5 is printed on the upper and lower surfaces thereof, and the four-armed helical structure is a rectangular helical structure or a circular helical structure. The four starting arms centered on the same starting point rotate n times clockwise or counterclockwise at the same time, where n is a natural number. The included angle between adjacent starting arms among the four starting arms is 90 degrees,...
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The invention discloses a miniaturized low-frequency magnetic annular moment near magnetic field focusing magnifying lens, comprising odd metamaterial units, wherein the odd is more than 1, the odd metamaterial units are arranged asymmetrically and excited by adopting plane wave, and the directions of the wave, electric field and magnetic field are perpendicular to each other. By adopting the lens in a wireless energy transmission system, the spatial magnetic field between a transmitting antenna and a receiving antenna is strengthened greatly, and minimum loss is simultaneously realized.
Description
technical field [0001] The invention relates to the field of magnetic wireless energy transmission, in particular to a miniaturized low-frequency magnetic ring moment near magnetic field focusing magnifying lens. Background technique [0002] The existing traditional Chinese medical magnetic hardware system is still in the stage of physical experiments. The key problems are: near-field divergence, insufficient field strength, and rapid attenuation with distance, such as medical imaging treatment, insufficient target tissue strength, insufficient depth, and normal tissue damage. The efficiency of wireless energy transmission decreases sharply as the distance increases. The same problem exists in other fields as well. The root of the problem is that the near field of the exciting antenna is an evanescent wave, which attenuates sharply as the distance increases, and the near field divergence is not focused. The radiated energy from hundreds of MHz to GHz frequency band is eas...
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Login to View More IPC IPC(8): H01Q15/02H01Q15/00
CPCH01Q15/0086H01Q15/02
Inventor 黄惠芬罗波
Owner SOUTH CHINA UNIV OF TECH