The reason why the early warning aircraft has a strong detection capability is inseparable from the invisible "thousand foot tentacles" of the early warning aircraft radar.

The working principle of radar (Radio Detectiori and Ranging): The typical radar is pulse radar, which is mainly composed of antenna, transceiver switch, transmitter, receiver, timer, display, power supply and so on. The transmitter produces a strong power high frequency oscillation pulse. A directional antenna converts such high-frequency oscillation into a beam-shaped electromagnetic wave (abbreviated as a beam) that propagates in space at the speed of light. When an electromagnetic wave encounters a target during propagation, the target is excited to generate secondary radiation, and a small portion of the electromagnetic wave in the secondary radiation returns to the radar and is collected by the antenna, which is called an echo signal. The receiver amplifies and transforms the echo signal and sends it to the display for detection to detect the presence of the target.

On the 70th anniversary military parade, the Air Police-500 uses a disc-shaped three-sided array active phased array antenna similar to the active air police-2000, with an elliptical cross section, and the lower part of the central section is fixed to the back of the machine by two pillars. The enemy and the enemy identification antenna, the high-speed tactical intelligence data transmission antenna, the radar antenna cooling system, and the radome air conditioning system are all installed in the central section.

Radar power supply plays an important role as the energy supply unit for the entire radar. The AWACS radar has a large transmitting power and is called an electric tiger. If the power supply is too large in size and weight, it cannot be installed on the aircraft. Therefore, how to develop an ideal high-voltage power supply for the early warning aircraft with a light weight is a real problem facing the research team of the early warning aircraft.

Foreign experts ridicule said: This is a task that the Chinese development team can‘t complete!

Tang Dengping, the engineer of the 14th Research Institute of China Electronics Technology Group Corporation, and his team have done more than a thousand tests. In the past three years, they have overcome many technical problems such as power, heat dissipation and electromagnetic interference. Breakthrough.

Characteristics of early warning aircraft radar and radar power supply

In traditional radar, centralized high-power, high-voltage transmitters are usually used. In recent years, active phased array radars have become the first choice for military radars due to continuous innovation and advancement in radar technology.

Due to the use of active phased array technology, traditional transmitters are also replaced by distributed components in solid-state active phased array radars, so low-voltage, high-current, high-power front-of-the-line power supplies replace traditional high-power, high-voltage Transmitter power.

In the parade-style air police-500 compared with the active air police-2000, the Yun-9 medium-sized transport aircraft was used as the modification platform. This is the first time in the history of the early warning aircraft to fully adopt the domestic processing platform, the domestic operating system and the database. However, the -9 is relatively small in size, so it has to abandon the characteristics of the large-scale early warning radar in active service, and use the world‘s leading digital phased array radar technology to achieve a significant drop in weight and radar antenna aperture. At the same time, the comprehensive performance of the intelligence processing capability and anti-interference ability of the early warning radar cannot be reduced. Therefore, the miniaturization of the radar is imminent, but the transmission power requirement is still very high. This is also the difference between the radar power supply and the ordinary switching power supply: power and volume. Small, lightweight and reliable.