2025年1月9日 · Radar, electromagnetic sensor used for detecting, locating, tracking, and recognizing objects of various kinds at considerable distance. It operates by transmitting …

2025年1月8日 · Since its initial application in meteorological work, radar has grown as a forecaster’s tool. Virtually all tornadoes and severe thunderstorms over the United States and …

2025年1月9日 · Radar - Detection, Military, Technology: Serious developmental work on radar began in the 1930s, but the basic idea of radar had its origins in the classical experiments on …

2025年1月9日 · Radar - Imaging, Detection, Navigation: Radar can distinguish one kind of target from another (such as a bird from an aircraft), and some systems are able to recognize …

2025年1月9日 · Radar - Doppler, Weather, Detection: For many years radar has been used to provide information about the intensity and extent of rain and other forms of precipitation. This …

2025年1月9日 · Radar - Pulse, Detection, Reflection: The most common type of radar signal consists of a repetitive train of short-duration pulses. The figure shows a simple representation …

2025年1月9日 · Serious application of the Doppler principle to radar began in the 1950s, and today the principle has become vital in the operation of many radar systems. As previously …

Applications. The main nonmilitary use of radar is in avoiding collision. Using radar, the navigator of a ship can see other vessels irrespective of light conditions. It is therefore safe for a craft to …

In radar: Airport surveillance radar 9 GHz (within the S band). Its klystron transmitter has a peak power of 1.3 megawatts, a pulse width of 1 microsecond, and an antenna with a horizontal …

The transmitter of a radar system must be efficient, reliable, not too large in size and weight, and easily maintained, as well as have the wide bandwidth and high power that are characteristic …