03-07-2012, 15:39
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מנהל פורום צבא ובטחון
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חבר מתאריך: 04.05.02
הודעות: 22,953
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JY-11B תוצרת סין
ציטוט:
ECRIEE / CETC JY-11/JY-11B HUNTER-1, XINDI
This radar is carried in the 2004 CRIA listing of Chinese indigenous products.
A modern, highly mobile F-band radar with an integrated D-band IFF sub-system designed as a low-to-medium altitude 3D surveillance gap-filling system, capable of military air traffic control (ATC). This radar was first declared (as HUNTER1) at the International Radar Symposium in Munich 1998, where it was stated to be a highly mobile, solid-state, frequency-scanning, target indication radar. For mobility it locates very quickly piggy-back fashion on a flat-back 4x4 truck.
The JY-11 is a 3D radar, mechanically scanned in azimuth and frequency scanned in elevation where it has five groups of beams: one long range and four medium range groups. The five groups forming a total of 14 electronically scanned beams providing 30º of vertical cover. Facilities and capabilities include a narrow-beam, low sidelobe antenna with dual, slow-wave structure enabling the radar to operate over two sub-frequency bands separated by 100 MHz, which overcomes the disadvantage of weak anti-active jamming capability in a single band. Digital pulse compression with a relatively low power output, across a large dynamic range, is achieved by a fully coherent highly reliable frequency synthesizer.
There is a JY-11B but it appears to have significantly newer attributes. This radar is not carried in the 2004 CRIA listing of Chinese indigenous products. The JY-11B Mobile, Low-Altitude Radar is believed to have been advertised for the first time in the CETC 2007 catalogue of products and is claimed to be a solid-state, mobile, low-altitude 3D air surveillance radar, operating in the E/F-band. It employs ‘reconfigurable’ transmission beams and Digital Beam Forming (DBF) for reception to provide low-altitude and good sea-surface detection, with modern processing techniques including AMTI and pulse Doppler sampling. Unlike the forgoing JY-11, this is not a dismountable system but the antenna can be raised on a hydraulically controlled tower to improve the system’s low altitude coverage, very similar in concept and design to the German TRM-S system, or ByeloRussian Vostok E.
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נערך לאחרונה ע"י סירפד בתאריך 03-07-2012 בשעה 15:44.
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