ion:The calculable dipole antennas available designed with commingler Balun is very costly,although this kind of antenna is very accurate. By designing a broadband gradual Balun,proposing open circuit⁃short circuit⁃load(OSL)way to get accurate S parameters,and using tested S parameter in the calculable antenna theory,a low⁃cost calculable dipole antenna co⁃vering the frequency of 1~2 GHz was developed. An acceptable computability of the calculable antenna was obtain in low cost, though the accuracy of the calculable antenna was reduced to some extent. This kinds of calculable antenna has higher cost⁃per⁃formance ratio.%现有的可计算偶极子天线主要使用混合器式巴伦设计。虽然这种可计算天线的准确性很好，但是成本极高。通过设计宽带渐进巴伦，并且提出开路⁃短路⁃负载（OSL）的方式准确测试巴伦的S参数，并将测试的S参数用于可计算天线理论中，研制覆盖1~2 GHz频段的低成本可计算偶极子天线。在一定程度上降低了可计算天线的准确性，但是却以低成本获得了可以接受的可计算性。这种可计算偶极子天线的性价比较高。
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