Abstract: Surrounding environment is one of the main factors which significantly affect the far-field antenna measurement system. To analyze the influences of high voltage wires on far-field antenna measurement, a method is provided that the amplitude and phase of transmission data are compared whether there are high voltage wires beside the antenna measurement field or not. The analysis method and the simulation results obtained by FEKO are given in this paper.

INTRODUCTION
With the rapid development and the application of phased array radar, monopulse antennas, large interferometers and adaptive technology, antenna measurements have become widely used[1]. Far-field measurement technique is one of the main measures to obtain the antenna radiation patterns. Compared with compact rangeand near-field measurement methods, it possesses the advantage of directly perceived, easy operation, fast scan velocity and high accuracy. But there are many difficulties in construction of far-field antenna measurement field and it is difficult to control the test environment around[4], especially the far-field sites for low-frequency and large-size antennas. Although the environment effects of the antenna under test, the test errors should be in an acceptable range. So the applications of far-field measurement techniques have been limited greatly.

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