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Marine radars are used by ships for collision avoidance and navigation purposes. The frequency band of radar used on most ships is X band (9 GHz/3 cm), but S band (3 GHz/10 cm) radar is also installed on most oceangoing ships to provide better detection of ships in rough sea and heavy rain condition.
Named X band because the frequency was a secret during WW2. Diffraction off raindrops during heavy rain limits the range in the detection role and makes this suitable only for short-range roles or those that deliberately detect rain. K u: 12–18 GHz: 1.67–2.5 cm: High-resolution, also used for satellite transponders, frequency under K band ...
Frequency bands in the microwave range are designated by letters. This convention began around World War II with military designations for frequencies used in radar, which was the first application of microwaves. There are several incompatible naming systems for microwave bands, and even within a given system the exact frequency range ...
AN/APS-15 H2X 10 GHz/X band bombing and navigational radar nicknamed as Mickey (equivalent to 3 GHz frequency British H2S) by Philco for Boeing B-29 Superfortress Martin PBM-3C/5/5E/5S Mariner Boeing B-17 Flying Fortress Consolidated B-24 Liberator Consolidated PB4Y-2 Privateer and Lockheed PV-1 Ventura, unlike the British H2S radar; H2X could ...
X band is used in radar applications, including continuous-wave, pulsed, single-polarization, dual-polarization, synthetic aperture radar, and phased arrays. X-band radar frequency sub-bands are used in civil, military, and government institutions for weather monitoring, air traffic control, maritime vessel traffic control, defense tracking ...
The 30/20 GHz band is used in communications satellite uplinks in either the 27.5 GHz or 31 GHz bands, [5] and in high-resolution, close-range targeting radars aboard military airplanes. Some frequencies in this radio band are used for vehicle speed detection by law enforcement. [6]
Radar transmission frequency spectrum of a trapezoid pulse profile Recent advances in signal processing techniques have made the use of pulse profiling or shaping more common. By shaping the pulse envelope before it is applied to the transmitting device, say to a cosine law or a trapezoid, the bandwidth can be limited at source, with less ...
Height finder radar: AN/FPS-27: S-band Frequency Diverse (FD) search radar: Westinghouse Electronics: AN/FPS-30: Long range early warning radar: AN/FPS-35: Frequency diverse long range air defense search radar: Sperry Corporation: AN/FPS-41: S-band weather radar: AN/FPS-49: Ballistic Missile Early Warning System (BMEWS) five-horn monopulse ...