According to characteristics of any measured far-field antenna patterns, a side-lobe searching algorithm, based on a special integral method for calculating peak areas and a new decision rule, is proposed in detail, in which both time and space complexities are getting analyzed deeply and effectiveness of the algorithm is confirmed by some typical examples. The algorithm could be applied not only to search for side-lobes in measured far-field antenna patterns with serious spurs, but also to calculate other parameters of antenna patterns such as axis ratio etc. Some special examples show that it's a high-reliable, wide-applicable and high-speed algorithm.
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