Title :
A 2-D Van Atta Array Using Star-Shaped Antenna Elements
Author :
Wong, Ka Wai ; Chiu, Leung ; Xue, Quan
Author_Institution :
Dept. of Electron. Eng., City Univ. of Hong Kong
fDate :
4/1/2007 12:00:00 AM
Abstract :
A new passive 2-D Van Atta array is introduced with star-shaped antenna elements. The star-shaped antenna is proposed for low mutual coupling in the array. A single antenna element designed at 5.8 GHz has two orthogonal feeding ports with 23 dB port return loss and 28 dB isolation between ports. The mutual coupling among the antenna elements is less than -15.5 dB, which is 5 dB better than the conventional square patch antenna. Experimental results show that this array keeps a constant retrodirective characteristic at arbitrary injection polarization and direction. A stable bistatic radar cross section (BRCS) within 120deg angle can be achieved at 5.8 GHz
Keywords :
antenna feeds; antenna radiation patterns; electromagnetic coupling; electromagnetic wave polarisation; microwave antenna arrays; radar antennas; radar cross-sections; 2D Van Atta array; BRCS; bistatic radar cross section; injection polarization; mutual coupling; orthogonal feeding port; retrodirective characteristics; star-shaped antenna element; Antenna arrays; Antenna measurements; Antenna radiation patterns; Antennas and propagation; Impedance; Linear antenna arrays; Mutual coupling; Patch antennas; Phased arrays; Scattering parameters; Mutual coupling; retrodirective array; star-shaped antenna;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2007.893407
