Electrically small ferrite antenna gain with dc magnetic field for mobile device application

Jaejin Lee, Yang Ki Hong, Woncheol Lee, Jihoon Park, Terumitsu Tanaka, Changhan Yun

Research output: Contribution to journalArticlepeer-review


We demonstrate that electrically small ferrite antenna gain is significantly increased with a small dc magnetic field of compact Nd-Fe-B permanent magnet (9.5 × 4.6 × 1.5 mm3). The experimental magnetic tangent loss of the Ni-Mn-Co ferrite decreased by about 62%, which was from 0.509 with 0 Gauss to 0.192 with 750 Gauss. The antenna gain increased by 54% (from -10.58 to -4.81 dBi) when the magnetic field of 1600 Gauss was applied to the antenna. The ferrite antenna has the volume of 0.346 cm3 and shows omnidirectional patterns, which are suitable for hand-held mobile device applications.

Original languageEnglish
Pages (from-to)1531-1534
Number of pages4
JournalMicrowave and Optical Technology Letters
Issue number7
Publication statusPublished - Jul 2014

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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