The Mutual Coupling Reduction between Two J-Shaped Folded Monopole Antennas for Handset
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概要
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In this study, we propose a method to reduce the mutual coupling between two J-shaped folded monopole antennas (JFMAs), which cover the IEEE 802.11 b/g (2400-2484MHz) band. First, the change in mutual coupling with the spacing between the two antenna elements is investigated by considering two feeding models, and the effects of changes in the coupling on the antenna efficiency are studied. Subsequently, we try the method to reduce mutual coupling, the method involves the use of a bridge line that links the two antennas. The mutual coupling can be significantly reduced and the total antenna efficiency can be improved by linking two shorting strips with the bridge line. In a past study, we had found that in the case of L-shaped folded monopole antennas (LFMAs), the mutual coupling and antenna efficiency vary with the linking location on the bridge line. Moreover, we compare the characteristics of the LFMA and JFMA and show that the JFMA is effective when miniaturized.
- 2011-05-01
著者
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MORISHITA Hisashi
Dept. of Electrical and Electronic Engineering, National Defense Academy
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Morishita Hisashi
Dept. Of Electrical And Electronic Engineering National Defense Academy
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Morishita Hisashi
Dept. Of Electrical & Electronic Eng. National Defense Academy
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Tuan Hung
Dept. Of Electrical And Electronic Engineering National Defense Academy
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Itoh Jun
Dept. Of Electrical And Electronic Engineering National Defense Academy
関連論文
- Characteristics of Built-In Folded Monopole Antenna for Handsets(2004 International Symposium on Antennas and Propagation)
- Analysis of Built-In Antennas for Handsets by the Electromagnetic Simulators(Analytical and Simulation Methods for Electromagnetic Wave Problems)
- A Folded Loop Antenna System for Handsets Developed and Based on the Advanced Design Concept(Special Issue on Innovation in Antennas and Propagation for Expanding Radio Systems)
- Analysis of Handset Antennas in the Vicinity of the Human Body by the Electromagnetic Simulator
- Downsized Bow-Tie Antenna with Folded Elements
- A Balance-Fed Loop Antenna System for Handset (Special Section on Multi-dimensional Mobile Information Networks)
- Compact Built-In Handset MIMO Antenna Using L-Shaped Folded Monopole Antennas
- A numerical study on handset MIMO antenna by using folded monopole antennas (マイクロ波)
- The Mutual Coupling Reduction between Two J-Shaped Folded Monopole Antennas for Handset
- Broadband Characteristics of a Planar Folded Dipole Antenna with a Feed Line
- A study on wideband L-shaped folded monopole antenna with parasitic element