Sector nulling in planar irregular sub‐arrayed sparse array antennas. Issue 1 (1st January 2016)

• Record Type: Journal Article
• Authors: Khan, Asim Ali; Brown, Anthony Keith
• Is Part Of: IET microwaves, antennas & propagation. Volume 10:Issue 1(2016)
• Page Start: 25
• Page End: 30
• Publication Date: 2016-01-01
• Subjects: planar antenna arrays -- interference suppression -- optimisation -- jamming; planar irregular subarrayed sparse array antenna -- angular sector null synthesis -- aperture distributed subarray -- hybrid optimisation tool -- array element excitations -- interference jamming -- 2D sector null synthesis -- 1D sector null synthesis; Microwaves -- Periodicals; Microwave antennas -- Periodicals; Antennas (Electronics) -- Periodicals; Radio wave propagation -- Periodicals; Microwave communication systems -- Periodicals; 621.381305
• DOI: 10.1049/iet-map.2014.0712
• Languages: English
• ISSNs: 1751-8725

Abstract

Abstract : This study concerns wide angular sector (higher order) null synthesis in planar irregular sparse antenna arrays when aperture distributed sub‐arrays are used to reduce the computational load. A hybrid optimisation tool has been used to find array element excitations to achieve as low as possible sector nulls for the desired sector width. Performance comparisons have been made for three sub‐array configurations based on the obtained numerical results. Various interference jamming scenarios have been considered including single and dual sectors for single‐dimensional ( θ ) (1D) and two‐dimensional ( θ, ϕ ) (2D) nulls. The proposed optimisation scheme has shown to be successful for the synthesis of 1D and 2D sector nulls with depths as low as −100 dB for the given configuration with reduced computational time when compared with the full array. The comparison of achieved null depths for different sub‐array sizes and convergence time has also been presented and discussed.