DocumentCode :
2323030
Title :
Amplitude-only beam scanning in linear antenna arrays
Author :
Sayidmarie, Khalil H. ; Jasem, Baedaa J M
Author_Institution :
Coll. of Electron. Eng., Univ. of Mosul, Mosul, Iraq
fYear :
2010
fDate :
27-30 June 2010
Firstpage :
1
Lastpage :
6
Abstract :
In phased arrays the mainbeam is scanned by either varying the phase excitations of the elements or varying the frequency of operation. In spite of their extensive use, these methods need either variable phase shifters or frequency sweeping. It is shown here that beam scanning is also feasible by varying magnitudes of the array element excitations thus alleviating the need for phase shifters or frequency variation. In this technique, the amplitude excitations of some side elements are reduced while those of the others are increased by proper power division or weighting in the feed network of the array. Theoretical analysis and computer simulations are presented to verify the proposed idea. A 3-element array is studied first, then the idea is extended to a 7-element array. Simulation results show appreciable scan angles with minor variation in the mainbeam level. Some degradation in the array pattern is noticed at large scan angles.
Keywords :
antenna phased arrays; antenna radiation patterns; beam steering; 3-element array; amplitude-only beam scanning; antenna phased arrays; beam steering; frequency sweeping; phase excitations; phase shifters; Computational modeling; Phased arrays; Amplitude scanning; Beam steering; Phased arrays; Scanned arrays; Smart arrays;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Systems Signals and Devices (SSD), 2010 7th International Multi-Conference on
Conference_Location :
Amman
Print_ISBN :
978-1-4244-7532-2
Type :
conf
DOI :
10.1109/SSD.2010.5585596
Filename :
5585596
Link To Document :
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