机载多卜勒导航系统中往往需要一个波束开关来控制多个单独指向地面的波束。在现有的微波元件中,用铁氧体开关来完成此任务是最稳定和可靠的,而且控制也方便。一般,用多个铁氧体开关组合即可使来自发射机的微波能量在天线阵列上形成方向依次变换、时间分割的波束。本文对各种铁氧体开关作了比较,着重介绍±45度法拉弟旋转 Airborne Doppler navigation systems often require a beam switch to control multiple beams pointing individually to the ground. In the existing microwave components, with ferrite switch to complete this task is the most stable and reliable, but also easy to control. In general, the combination of multiple ferrite switches allows the microwave energy from the transmitter to be directionally converted, time-divided, in the antenna array. This article compares a variety of ferrite switches, focusing on ± 45 degrees Faraday rotation