| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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Application of Ultra-Compact Single Negative Waveguide Metamaterials for a Low Mutual Coupling Patch Antenna Array Design |
| CAI Tong**, WANG Guang-Ming, LIANG Jian-Gang, ZHUANG Ya-Qiang |
Electromagnetic Field and Microwave Technique, Air and Missile Defend College of Air Force Engineering University, Xi'an 710051
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| Cite this article: |
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CAI Tong, WANG Guang-Ming, LIANG Jian-Gang et al 2014 Chin. Phys. Lett. 31 084101 |
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Abstract A novel ultra-compact single-negative waveguide metamaterial (WG-MTM) based on a complementary anti-parallel-spiral line (CAPAL) is proposed and investigated by circuit model analysis, electromagnetic simulation and extraction of the effective parameters. The cell is ultra-compact with dimensions of λ0/22.08×λ0/22.08, which advances a step further toward homogenized concept. Two band-gaps attributing to the negative permeability and negative permittivity appear when the CAPAL-WG-MTM cells response to the time-varying perpendicular E-field and parallel H-field, and thus a high decoupling efficiency is obtained. Mutual coupling reduction of about 8.27 dB is realized by inserting 7×1 CAPSL-WG-MTM cells between two closely placed antenna elements with an edge-to-edge separation of only λ0/19.23. Moreover, the radiation characteristics are improved for both the patch element and the antenna array. A higher front-to-back ratio is obtained for the patch element and an increase of 0.64 dB for the gain of the antenna array by using the CAPAL-WG-MTM structure.
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| PACS: |
41.20.Jb
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(Electromagnetic wave propagation; radiowave propagation)
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41.20.-q
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(Applied classical electromagnetism)
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84.40.Ba
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(Antennas: theory, components and accessories)
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