Journal
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
Volume 65, Issue 7, Pages 2321-2329Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TMTT.2017.2658562
Keywords
Decoupling network; multiple input multiple output (MIMO) antenna array; mutual coupling; network synthesis
Categories
Funding
- Research Grants Council of the Hong Kong Special Administrative Region, China [CUHK 410713]
- Development and Reform Commission of Shenzhen Municipality [Shen Fa Gai (2013) 1673]
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This paper presents an LC low-pass p network to decouple a pair of coupled antennas working at low frequencies. Comparing with existing decoupling techniques, the proposed decoupling network provides a wideband but compact decoupling solution. Moreover, a generalized one-fit-all scheme is justified to implement the decoupling network with an antenna independent core network. By adjusting a few external components, the same core network can be applied to a collection of antenna pairs with different coupling levels and antenna form factors. Four design examples are given to demonstrate the unique features of the proposed network for low-frequency applications. In all cases, the decoupling network significantly improves the isolation between two antennas over a wide frequency band while the intrinsic matching bandwidth of the antennas is maintained.
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