| 1. |
- Månsson, Daniel, et al.
(author)
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Comparing analytical and numerical calculations of shielding effectiveness of planar metallic meshes with measurements in cascaded reverberation chambers
- 2012
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In: Progress In Electromagnetics Research C. - 1937-8718. ; 31, s. 123-135
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Journal article (peer-reviewed)abstract
- Large electrical systems or facilities can be satisfactorily shielded by using low-cost meshed metallic nets. Here the shielding effectiveness for two such planar meshes is calculated analytically and verified both experimentally by using cascaded reverberation chambers as well as numerically with results computed using a full wave electromagnetic solver. It is shown that all three methods agree and, in addition, that non-square shaped aperture meshes can be handled with an equivalent square area shaped aperture.
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| 2. |
- Wang, L., et al.
(author)
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Design of fragment-type isolation structures for MIMO antennas
- 2014
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In: Progress In Electromagnetics Research C. - 1937-8718. ; 52, s. 71-82
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Journal article (peer-reviewed)abstract
- Fragment structure should find its application in acquiring high isolation between multiple-input multiple-output (MIMO) antennas. By gridding a design space into fragment cells, a fragment-type isolation structure can be constructed by metalizing some of the fragment cells. For MIMO isolation design, cells to be metalized can be selected by optimization searching scheme with objectives such as isolation, return losses, and even radiation patterns of MIMO antennas. Due to the exibility of fragment-type isolation structure, fragment-type structure has potentials to yield isolation higher than canonical isolation structures. In this paper, multi-objective evolutionary algorithm based on decomposition combined with genetic operators (MOEA/D-GO) is applied to design fragment-type isolation structures for MIMO patch antennas and MIMO PIFAs. It is demonstrated that isolation can be improved to different extents by using fragment-type isolation design. Some technique aspects related to the fragment-type isolation design, such as effects of fragment cell size, design space, density of metal cells, and efficiency consideration, are further discussed.
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| 3. |
- Xiao, Fei, et al.
(author)
-
Compact Third-Order Microstrip Bandpass Filter Using Hybrid Resonators
- 2011
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In: Progress In Electromagnetics Research C. - 1937-8718. ; 19, s. 93-106
-
Journal article (peer-reviewed)abstract
- In this paper, a novel microwave bandpass filter structure is proposed. By introducing a metallic via hole, the filter structure operates as one λ/2 and two λ/4 uniform impedance resonators and consequently form a triplet coupling scheme. The equivalent circuit model is analyzed in detail, which shows that there is a transmission zero in the low stopband. Based on that concept, three microstrip filters are designed, fabricated and measured, respectively. The first filter has no source/load coupling and only one transmission zero is created. By introducing source/load coupling, the second filter can create three transmission zeros. The third filter can create a controllable transmission zero in upper stopband. The simulated and measured results agree very well.
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