Anti-interference measuring device for environmental electromagnetic radiation of mobile communication base station

Abstract

An anti-interference measuring device for environmental electromagnetic radiation of a mobile communication base station comprises a square or cuboid shield body, wherein a square opening is formed in one side surface of the square or cuboid shield body; other five surfaces of the square or cuboid shield body are metal shielding surfaces; and wave-absorbing materials are paved on the surface of the whole inner cavity of the shield body. The width and the height of a net cavity of the shield body are two times of the longest wavelength of a downlink signal of the mobile communication; and the length of the net cavity is two times greater than or equal to the longest wavelength of the downlink signal of the mobile communication. The wave-absorbing materials comprise two kinds, wherein one kind of the wave-absorbing materials is paved at the center at the inner sides of the shielding surfaces and the wave-absorbing performance of the wave-absorbing material for a 1GHz frequency signal can reach or exceed -25dB; and the other kind of the wave-absorbing materials is paved on remaining gaps at the periphery of the inner sides of the shielding surfaces and the wave-absorbing performance of the wave-absorbing material for the 1GHz frequency signal can reach or exceed -12dB. The anti-interference measuring device further comprises a radio-frequency integrated field intensity indicator arranged on the wave-absorbing material on the bottom surface of an inner cavity of the shield body; and a measuring signal of the radio-frequency integrated field intensity indicator is output by optical fibers and is connected with a portable computer through a photoelectric conversion head. The anti-interference measuring device disclosed by the invention can be used for carrying out accurate anti-interference measurement on the environmental electromagnetic radiation level of the mobile communication base station.

Description

technical field [0001] The invention belongs to the technical fields of environmental electromagnetic radiation measurement, electromagnetic compatibility and electromagnetic shielding, and in particular relates to an anti-interference and accurate measurement device for the environmental electromagnetic radiation level of a mobile communication base station. Background technique [0002] Electromagnetic radiation pollution has become the fourth largest pollution after air, water and noise pollution. Mobile communication base stations are the main source of electromagnetic radiation in cities, and can reach every 0.09km in densely populated urban areas. 2 There is only one base station. The public is very concerned about the electromagnetic radiation generated by the base station antenna. Correspondingly, the environmental monitoring department has also carried out a lot of monitoring and research. The main monitoring methods are radio frequency integrated field strength met...

AI Technical Summary

Problems solved by technology

[0003] The main advantages of the radio frequency integrated field strength meter: rapid response, not in the form of frequency sweep, can measure the electromagnetic radiation level of all signals in the probe frequency band; disadvantages: can not perform frequency band measurement, when measuring a specific object (in a certain frequency band) , the signals of other frequency bands in the environment are also included, causing the measurement results to be too large

The main advantage of the spectrum analyzer: it can accurately measure a certain frequency point without interference from non-measurement frequency points; disadvantage: the measurement is carried out in the form of sweeping frequency, which is suitable for mobile communication such as fast (μs level) changing frequency objects , it is difficult to measure accurately and completely, and it is difficult to give the total electromagnetic radiation level of a certain frequency band

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