基于区间方法的天线及其电性能分析.docx

Abstract
In manufacturing and installation process or in an actual working condition, there
is always something uncertain for an antenna. For the reflector antennas, these
uncertainties would make the antenna surface distorted as well as the position and
pointing angel of the feed phase center. And for the array antennas, it will cause the
units position and work amplitude and phase of uncertainty, which will further
led to the electrical performance range in a certain interval. In this paper, intervals are
used to express the uncertain parameters of antennas. The influences of the uncertain
errors on antenna structure and electrical performance are analyzed based on
non-probabilistic interval method.
The effect of the uncertain errors of reflector antenna on the electrical
performance is analyzed based on the non-probability interval method in this paper.
The relationship between the position errors as well as the pointing angel errors of the
feed phase center and the aperture ic field is deduced. An interval
numerical model, which reflects the effect of the uncertain errors of reflector antenna
on the far field pattern, is established. The trigonometric function is used to express the
complex exponential and its numerical results are solved so as to calculate interval
complex exponential. Meanwhile, the lower and upper bounds of the power pattern
function is obtained according to the method above.
In this paper, the effect of the uncertain random errors of array antenna on the
electrical performance is also analyzed based on the non-probability interval method.
Array antenna random errors including work amplitude and phase errors and
the unit position error. The relationship between random uncertainty errors and the
aperture ic field is given. And an interval model, which reflects the effect
of the random uncertain errors of array antenna on the far field pattern, is established.
According to the interval arithmetic rule, the upper and low