谐波雷达是近十几年来发展的一种新雷达体制,目前在国内外已引起人们的注意。据报道,已经制成了汽车防撞用的谐波雷达,还制成并试验了若干舰载、地面和机载的雷达系统。谐波雷达的工作基于某些物体对所照射的电磁波产生谐波辐射的原理。许多金属的人造物体在高功率微波照射下会辐射出谐波频率,而大多数的自然物体,包括植物、大地和海面等,则不会产生谐波辐射。这种现象早期发生于船舶通信中,近来也在卫星通信中发生。对谐波辐射的物理构造目前尚不太明了,有人认为是由于物体的电磁转移特性中有非线性而引起的。具有指数电压-电流特性的半导体二极管能增强许多物体的谐波回波,它是谐波雷达的极好目标。文中将 Harmonic radar is a new radar system developed in recent ten years and has attracted people’s attention at home and abroad. It has been reported that a harmonic radar for vehicle crash prevention has been made and several shipborne, ground and airborne radar systems have also been manufactured and tested. The work of harmonic radar is based on the principle that some objects produce harmonic radiation on irradiated electromagnetic waves. Many metal man-made objects radiate harmonic frequencies under the irradiation of high-power microwaves, and most natural objects, including plants, earth and sea, do not generate harmonic radiation. This phenomenon occurred early in ship communications and has recently also taken place in satellite communications. The physical structure of the harmonic radiation is not yet clear, some people think that is due to the electromagnetic transfer properties of objects in non-linear caused. Semiconductor diodes with exponential voltage-current characteristics enhance the harmonic echoes of many objects and are an excellent target for harmonic radar. Text will