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Passive radar - Wikipedia

Passive radar (also referred to as parasitic radar, passive coherent location, passive surveillance, and passive covert radar) is a class of radar systems that detect and track objects by processing reflections from non-cooperative sources of illumination in the environment, such as commercial … See more Conventional radar systems comprise a colocated transmitter and receiver, which usually share a common antenna to transmit and receive. A pulsed signal is transmitted and the time taken for the pulse to travel to … See more Passive radar systems have been developed that exploit the following sources of illumination: • Analog television signals • FM radio signals See more Receiver system A passive radar system must detect very small target returns in the presence of very strong, continuous interference. This contrasts with a … See more Advocates of the technology cite the following advantages: • Lower procurement cost • Lower costs of operation and maintenance, due to the lack of transmitter and moving parts • Covert operation, including no need for frequency allocations See more The concept of passive radar detection using reflected ambient radio signals emanating from a distant transmitter is not new. The first radar experiments in the United Kingdom in 1935 by Robert Watson-Watt demonstrated the principle of radar by detecting a See more In a conventional radar system, the time of transmission of the pulse and the transmitted waveform is exactly known. This allows the object range to be easily calculated and for a matched filter to be used to achieve an optimal signal-to-noise ratio in … See more Passive radar performance is comparable to conventional short and medium-range radar systems. The detection range can be determined using the standard radar equation, but ensuring proper account of the processing gain and external noise limitations is taken. … See more WebMany translation examples sorted by field of work of “passiverad yta” – Swedish-English dictionary and smart translation assistant. WebJan 27, 2024 · If unsure, use the quoted Sd for that radiator, then use the following equation to determine the effective radius: R = (Sd/PI)^0.5. In this case, we choose to use a … lake michaelatown