Sending and receiving circuit design for ground-based coherent high-frequency radar

The sending and receiving circuit is designed in this paper for ground-based coherent high-frequency radar. The system has some functions such as antenna aperture standing wave detection, final-stage power amplifier temperature detection and detection of various power source voltages and currents; it is capable of outputting large standing-wave ratio protection and sending and receiving time sequence protection and detecting overheating, overvoltage and overcurrent, while it can also prevent wrong operations, effectively reduce failures and increase reliability of the whole system; the system can carry out sequential starting through remote control, so that the huge surge impacts brought by simultaneous starting to the power supply grid can be avoided.