ÆÓÐÍÀË ÐÀÄÈÎÝËÅÊÒÐÎÍÈÊÈ. ISSN 1684-1719. 2021. ¹ 3
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DOI https://doi.org/10.30898/1684-1719.2021.3.8
ÓÄÊ
621.396
Comparative analysis of cylindrical And planar Aesa in 3d suveillance radar
D. Paunović
MITEC doo, Branka Miljkovica 27, 11060, Beograd (Palilula)
Serbia
The paper was received on January 26 2021, after correction – on February 9, 2021
Abstract. A modern rotating 3D surveillance radars scan azimuth by mechanical rotation, and scan elevation using Active Electronic Scanning Array (AESA) in Multi Beam Receive Mode (MBM). Radars with fixed cylindrical AESA and four-sided prismatic antenna, with 4 flat AESA, scan azimuth electronically, without mechanical rotation. The most significant advantage of electronic scanning is the possibility of Multi-mode operation: surveillance targets in the far zone and targeting targets in the near zone. However, electronic scanning also brings problems. A main beam of planar AESA spreads and lateral lobes increase when the radiating direction increases. An original arrangement of shifted array to reduce lateral lobes has been proposed. The cylindrical array has a constant shape of pattern during azimuth scanning. But, for both prismatic and cylindrical AESA, the beam deforms during scanning in vertical plane, so limits the elevation scan. Also, the complexity and price of fixed AESA is significantly higher compared to the rotating one. In order to enable the selection of the optimal solution for a specific application, the comparative analysis of advantages and disadvantages for cylindrical, prismatic and rotating AESA is done. The original configuration of the cylindrical AESA for Very Fast Scanning in Near-zone has been proposed.
Key words: cylindrical array, scan speed, beam deformation, surveillance time, multi-mode, multiple beam forming, active electronically scanned array (AESA).
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Äëÿ öèòèðîâàíèÿ:
Paunović D. Comparative analysis of cylindrical and planar aesa in 3d suveillance radar. Zhurnal Radioelektroniki [Journal of Radio Electronics]. 2021. No.3. https://doi.org/10.30898/1684-1719.2021.3.8.