In modern aviation, navigation is a very important technology. Usually, we refer to the process of guiding a carrier to sail on a given route as navigation. The use of radio technology to navigate all (or part of) the process of carrier navigation, known as radio navigation. So far, the radio navigation system is the most widely used navigation device in the world's military and civil aviation. Nearly all military and civil aviation airports are equipped with radio navigation systems. At present, the current status of short-range navigation in China's civil and military aviation is still based on radio navigation, and since the existing aircraft landing system devices are still not perfect, the radio navigation system is used to guarantee the homing and approach guidance of the aircraft. It is especially important. Currently widely used civil airborne radio navigation systems include automatic orientation machines, VHF omnidirectional beacon systems, instrument landing systems, weather radars, transponders, rangefinders, low altitude radio altimeters, Doppler navigation systems and Omi Gamma navigation system.
The radio navigation system consists of a ground navigation platform and airborne equipment. The airborne equipment is mainly composed of a loop antenna, a vertical antenna, an antenna amplifier, a ring matcher, a receiver, a central control unit, a radio heading indicator, an earphone and a connecting cable. It can automatically and continuously measure the heading angle of the aircraft relative to the ground navigation platform, which is convenient for navigation.
