四臂正弦天线是一种用途广泛的宽频带双极化天线。文中论述了正弦天线的工作原理、介绍了其主要特点和潜在的应用领域、以及四臂正弦天线的设计方法，并给出了一个0．5GHz-3GHz四臂正弦天线设计实例，测试表明该天线在6：1的带宽内具有很好的电性能。

As an important form of wide-band dual polarization antenna,the four-arm sinuous antenna has been widely used in EW equipments.In this paper,the operation principle and design method of the four-arm sinuous antenna are discussed,and the main characteristics and potential application field of this kind of antenna are also introduced.Finally,this paper gives an example of a four-arm sinuous antenna working at 0.5 to 3 GHz.The test result shows that this antenna has excellent electrical performance in a 6:1 bandwidth.

TN957.2