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Advanced Radiation Performance for Mobile Phone Antennas with Magneto-Dielectric Sheet

  • Journal of Knowledge Information Technology and Systems
  • Abbr : JKITS
  • 2016, 11(2), pp.87-93
  • Publisher : Korea Knowledge Information Technology Society
  • Research Area : Interdisciplinary Studies > Interdisciplinary Research
  • Published : April 30, 2016

Yong Jin Kim 1

1한국폴리텍 IV 대학 대전캠퍼스

Accredited

ABSTRACT

Due to the advanced development of wireless technologies, mobile communication systems have developed into a 4G LTE system, recently. It is important to implement the antenna with a small size and a broadband characteristic for the 4G LTE system. It have been considered to use magnetic materials for the mobile antenna implementation. However, because of the high loss of magnetic materials in the UHF band, it is in fact difficult to apply the antenna of cellular frequency bands. So, the magnetic materials is applied mainly to the low frequency antenna using several tens of MHz as like NFC antenna. To overcome the frequency limit according to the loss of the magnetic materials, it has been researched for low-loss magneto-dielectric materials available in the cellular frequency band. In this paper, the antenna structure with magneto-dielectric material sheet is proposed so as to minimize the loss of magnetic material in the cellular frequency band. The magneto-dielectric material sheet is shaped with hexa-ferrite composites which is fabricated by Samsung Electro-Mechanics Co., Ltd. By applying the magneto-dielectric sheet to the mobile phone antenna of the cellular frequency band, it is demonstrated by measuring the advanced performance characteristics of the antenna resulting a compact size and wide-band characteristics.

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