발간년도 : [2017]
| 논문정보 |
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| 논문명(한글) |
[Vol.12, No.2] Effect of Ferrite Sheet for Antenna Performance on Smart Phone |
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| 논문투고자 |
Yong-Jin Kim |
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| 논문내용 |
Recently, a lot of devices are built in a limited space on the smart phones or watches to support various multimedia functions. Especially, in the case of the smart watch supporting LTE communication, the antenna space is extremely small so that it is difficult to secure radiation performance. In addition, recently introduced smart phones are designed with a metallic frame on the outer surface, which makes it difficult to secure antenna mounting space and radiation performance. For this purpose, the numerous researches are being made to reduce a size of the antenna while improving the radiation performance of the antenna. A typical antenna using a magneto-dielectric material in a smart phone is an NFC antenna. The frequency of NFC is 13.56MHz, which uses a very low frequency compared to the cellular communication frequency. However, the magneto-dielectric materials are not used in an antenna for a cellular band because the magneto-dielectric materials have a characteristic that loss increases with an increase in frequency, which is difficult to use in a cellular communication frequency band. Recently, researches have been made to reduce the antenna volume and to improve the frequency bandwidth by using a magneto-dielectric materials for implementing the performance of MIMO antenna in a cellular communication terminals. In this paper, it is researched that the improvement of the antenna radiation efficiency is possible in the cellular frequency band by using ferrite sheet, which is one of the magneto-dielectric materials. |
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