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Title: New modal feed network for a compact monopole array with isolated ports
Authors: Coetzee, J.C.
Yu, Y. 
Keywords: Adaptive arrays
Antenna array feeds
Antenna arrays
Mutual coupling
Issue Date: 2008
Source: Coetzee, J.C., Yu, Y. (2008). New modal feed network for a compact monopole array with isolated ports. IEEE Transactions on Antennas and Propagation 56 (12) : 3872-3875. ScholarBank@NUS Repository.
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. © 2008 IEEE.
Source Title: IEEE Transactions on Antennas and Propagation
ISSN: 0018926X
DOI: 10.1109/TAP.2008.2007399
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