Millimeter wave cell radiation experimental apparatus assembled with planar choke ring

Abstract

The invention discloses millimeter wave cell radiation experimental apparatus assembled with a planar choke ring. The millimeter wave cell radiation experimental apparatus comprises a radiator, a plane bracket and a cell sample; the radiator consists of a solid-state source and an aperture antenna and is located below the plane bracket; the cell sample is placed on the plane bracket and is coaxially arranged with the radiator in the vertical direction; the millimeter wave cell radiation experimental apparatus further comprises the planar choke ring, a lifting sliding saddle, a high-precision three-dimensional sliding table and an industrial microscope; the planar choke ring is fixed to the lower surface of the plane bracket and is located between the radiator and the cell sample; the plane bracket is installed on the lifting saddle; the high-precision three-dimensional sliding table bears the radiator; the industrial microscope is arranged on the uppermost portion of the apparatus; the planar choke ring includes two layers of metal plates; and an upper elliptical hole and a lower elliptical hole are formed in the center of the upper metal plate and the center of the lower metal plate respectively to form a stepped structure. The planar choke ring of the millimeter wave cell radiation experimental apparatus can effectively reduce radiation nonuniformity of a cell experiment and improve radiation efficiency, and has good adaptability to mechanical manufacturing tolerance, installation deviation, frequency drift and electromagnetic parameters of the cell sample.

Description

technical field [0001] The invention belongs to the technical field of bioelectromagnetics, and in particular relates to a millimeter-wave cell radiation experiment device equipped with a planar choke coil. Background technique [0002] The possible harm of millimeter wave electromagnetic radiation to living things has been widely concerned. The determination of safety limits quantified with incident power density IPD is mainly based on experimental studies of the radiation effects of millimeter waves on cells. In the study, the performance of the millimeter-wave cell radiation experimental setup has a significant impact on the experimental results. [0003] The millimeter wave cell radiation experiment device mainly includes radiator, cell sample and plane bracket. The radiator is usually composed of a solid-state source connected to an aperture antenna, the solid-state source is located below, and the aperture antenna radiates millimeter waves upward along the axial dire...

AI Technical Summary

Problems solved by technology

There are four problems with the choke coil antenna: First, the design and optimization of the choke coil antenna takes IPD as the dose reference. Although the distribution of IPD in the radiation space is relatively concentrated and uniform, the loaded cell sample will significantly change the distribution of IPD, resulting in the following The radiation inhomogeneity and radiation efficiency of SAR as the dose reference are not optimal; secondly, the application of the choke coil antenna requires major changes to the existing radiator, replacing the aperture antenna with the choke coil antenna, and Redesigning the matching, isolation and assembly between the solid-state source and the choke coil antenna is technically difficult and costly; again, the slotted structure parameters of the choke coil antenna are many, and the parameter coupling is complicated, resulting in the choke coil antenna The operating frequency band is very narrow, and the frequency stability of the solid-state source is very high. When the frequency of the solid-state source drifts, it will destroy the radiation inhomogeneity and radiation efficiency with IPD as the dose reference; finally, the difference in the electromagnetic parameters of the cell sample will change. Multiple reflections of millimeter waves between cell samples and choke coil antennas, affecting radiation inhomogeneity and radiation efficiency with SAR as dose reference

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