被动探测是导弹导引头最理想的方式,因为它具有目前武器系统极为需要的各种性能,比如,成本低,尺寸和体积小,重量轻,并且不易被对方探测和干扰。对于探测目标飞机,红外波段是所有电磁波段中唯一可能的被动手段,因此,它广泛用于空对空和地对空的防御系统中。然而,红外导引头不具备全天候能力。随着飞机导航技术的提高,要求导弹能在有 Passive detection is the most ideal way of missile seeker, because it has the current performance of the weapons system in all kinds of needs, such as low cost, size and small size, light weight, and not easy to detect and interfere with each other. For the detection of the target aircraft, the infrared band is the only possible passive means of all electromagnetic bands, therefore, it is widely used in air-to-air and ground-to-air defense systems. However, infrared seekers do not have 24x7 capability. With the improvement of aircraft navigation technology, missiles can be required