Average electromagnetic radiation prediction method based on Gaussian model
A technology of electromagnetic radiation and prediction method, which is applied in the direction of electromagnetic field characteristics, measuring devices, and measuring electrical variables, etc., can solve problems such as large measurement burden, and achieve the effect of accurate prediction and large reference value
Active Publication Date: 2019-10-25
XIANGTAN UNIV
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Problems solved by technology
However, since the electric field in the human-occupied space is usually scanned to obtain the volume average, the measurement time is 6 minutes per scan point, which is a huge measurement burden
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[0030] The present invention will be further described in detail below in conjunction with specific embodiments. This embodiment is carried out on the premise of the content of the present invention, and detailed implementation steps are given, but the protection scope of the present invention is not limited to the following embodiments.
[0031] This embodiment predicts the GSM base station electromagnetic radiation intensity near the experimental building in the university campus. The experimental measurement equipment is a portable spectrum analyzer Keysight FieldFox N9918A and a periodic logarithmic antenna HyperLOG 60180. The antenna factor AF is 30dB / m, and the cable loss is A RF is 3dB, and the impedance Z of the radio frequency cable is 50Ω.
[0032] The invention provides a method for predicting average electromagnetic radiation based on a Gaussian model, comprising the following steps:
[0033] 1) Use the spectrum analyzer to measure in the time domain, set the swee...
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The invention discloses an average electromagnetic radiation prediction method based on a Gaussian model. The average electromagnetic radiation prediction method comprises the steps of: measuring to obtain an amplitude value by using a spectrum analyzer in a time domain, calculating an electric field value by means of the amplitude value obtained through measurement, calculating a probability anda cumulative distribution probability of the electric field value respectively by using the obtained electric field value, performing Gaussian probability density function fitting in MATLAB accordingto the obtained electric field value and the probability of the electric field value, performing Gaussian cumulative distribution function fitting in MATLAB according to the obtained electric field value and the cumulative distribution probability of the electric field value, and calculating average electromagnetic radiation intensity of a base station through analyzing parameters of the Gaussianmodels. The average electromagnetic radiation prediction method can predict the average electromagnetic radiation intensity of the base station quickly and precisely, has a great reference value for the research on the electromagnetic radiation exposure of the base station, and has certain social benefits.
Description
technical field [0001] The invention relates to an average electromagnetic radiation prediction method based on a Gaussian model. Background technique [0002] With the rapid increase in the number of base station antennas, more and more people are concerned about the health effects of electromagnetic radiation emitted by base stations. The basic safety limits for base station antennas are given based on specific absorption rates in the human body, but according to the evaluation procedure, the electric field strength in the absence of a human body is usually used as a reference level for compliance assessment. In the evaluation of electric field strength, it is generally necessary to measure the average root-square electric field within 6 minutes as the evaluation standard. However, since the electric field in the human-occupied space is usually scanned to obtain the volume average, the measurement time for each scanning point is 6 minutes, which is a huge measurement burd...
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Login to View More IPC IPC(8): G01R29/08
CPCG01R29/0857
Inventor 杨万春尹斐
Owner XIANGTAN UNIV