DocumentCode :
1041619
Title :
New Modal Feed Network for a Compact Monopole Array With Isolated Ports
Author :
Coetzee, Jacob C. ; Yu, Yantao
Author_Institution :
Sch. of Eng. Syst., Queensland Univ. of Technol., Brisbane, QLD
Volume :
56
Issue :
12
fYear :
2008
Firstpage :
3872
Lastpage :
3875
Abstract :
An element spacing of less than half a wavelength introduces strong mutual coupling between the ports of compact antenna arrays. The strong coupling causes significant system performance degradation. A decoupling network may compensate for the mutual coupling. Alternatively, port decoupling can be achieved using a modal feed network. In response to an input signal at one of the input ports, this feed network excites the antenna elements in accordance with one of the eigenvectors of the array scattering parameter matrix. In this paper, a novel 4-element monopole array is described. The feed network of the array is implemented as a planar ring-type circuit in stripline with four coupled line sections. The new configuration offers a significant reduction in size, resulting in a very compact array.
Keywords :
antenna feeds; eigenvalues and eigenfunctions; electromagnetic coupling; electromagnetic wave scattering; matrix algebra; monopole antenna arrays; antenna elements; compact monopole antenna array; eigenvectors; electromagnetic coupling; isolated ports; modal feed network; planar ring-type circuit; scattering parameter matrix; Adaptive arrays; Antenna arrays; Antenna feeds; Circuits; Degradation; Impedance; Jacobian matrices; Mutual coupling; System performance; Transmission line matrix methods; Adaptive arrays; antenna array feeds; antenna arrays; mutual coupling;
fLanguage :
English
Journal_Title :
Antennas and Propagation, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-926X
Type :
jour
DOI :
10.1109/TAP.2008.2007399
Filename :
4718004
Link To Document :
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