Double-focusing field electromagnetic tweezer implementation method based on time reversal spatial and temporal focusing mechanism
A technology of time inversion and space-time focusing, which is applied in the direction of electromagnets and electromagnets without armatures, can solve the problems that the mechanical characteristics of TR focusing field have not been reported publicly, and achieve widening size range, high practical value, Improve the effect of quantity and scale
Inactive Publication Date: 2017-02-01
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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[0007] The above studies mainly focus on how to use TR technology to achieve electromagnetic energy focusing, but there are no public reports on the mechanical properties of the TR focusing field.
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[0031] The technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings and examples of implementation, so as to understand the features and advantages of the present invention more clearly.
[0032] The present invention proposes a method for realizing a double-focus field EMT based on the TR space-time focusing mechanism, and the system structure schematic diagram of the device is as follows figure 1 As shown, it specifically includes “plane TRM” 101 , “pre-detection antenna array” 102 , “manipulation plane” 103 , observation equipment 104 , computer 105 , and signal recording and generating equipment 106 . In this embodiment, the antenna unit used is a Vivaldi ultra-wideband antenna, the central working frequency used is 4.3 GHz, the corresponding wavelength λ=69.77 mm, and the working bandwidth is 2 GHz. The EMT simulation model of dual focus field based on TR space-time focusing mechanism is as follows: fig...
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Abstract
The invention discloses a double-focusing field electromagnetic tweezer implementation method based on a time reversal spatial and temporal focusing mechanism, and belongs to the technical field of electromagnetic wave non-contact operation and control. According to the implementation method, a TR electromagnetic wave spatial and temporal focusing transmission mechanism is used as foundation, and two parallel focusing spots are generated through a planar time reversal mirror; and a hollow region with extremely weak electromagnetic field strength generated by an electromagnetic interference cancellation mechanism is generated between the two focusing spots to form an electromagnetic field gradient trap to generate required thrust and gradient force, so as to catch or control tiny particles with electric neutrality or weak current. Compared with a single-spot electromagnetic wave focusing field, the double-focusing field can remarkably lower scattering force, improve the gradient force of the electromagnetic field trap, and overcome the shortcomings of relatively weak dynamic action of the electromagnetic wave at frequency band of less than optical frequency band; in addition, the trap depth of the electromagnetic field can be increased, and the stability of the electromagnetic field at frequency band of less than optical frequency band in catching and controlling particles can be improved; and in addition, a large amount of particles with electric neutrality or weak current can be constrained in the narrow and long hollow region at the same time.
Description
technical field [0001] The invention belongs to the technical field of electromagnetic wave non-contact control, and in particular relates to a method for realizing a double-focusing-field electromagnetic tweezers based on a time-reversal space-time focusing mechanism. Background technique [0002] Non-contact manipulation of objects belongs to remote control. There is no mechanical contact between the device and the sample, so it will not cause mechanical damage to the sample, nor will it pollute and interfere with the surrounding environment of the sample. These characteristics make the technology of non-contact manipulation of objects widely used in life sciences, Medicine, genetic engineering, chemistry, physics, materials and nanoscience have broad application prospects. These characteristics have attracted many scholars to invest in the research, development and utilization of this technology. With the unremitting efforts of many scientists, the non-contact control tec...
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IPC IPC(8): H01F7/20
CPCH01F7/20
Inventor 赵德双郭子珍
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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