Development of a resonant excitation coil of AC magnetometer for evaluation of magnetic fluid

Mohd Mawardi Saari, Nazatul Sharreena Suhaimi, Saifudin Razali, Nurul Akmal Che Lah, Kenji Sakai, Toshihiko Kiwa, Keiji Tsukada

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


A high-homogeneity excitation coil with a resonant circuit for AC magnetometer is developed. A solenoid coil is designed to produce a high-homogeneity and strong excitation field using a resonant frequency method. The solenoid coil is fabricated with a Litz wire to suppress the increase of AC resistance due to the skin and proximity effects in the high-frequency region. The Litz wire is composed of 60 strands of copper wires with 0.1-mm diameter. The resonant frequency method is applied to cancel the reactance component by connecting the excitation coil with a capacitor in a series configuration. To enable excitation of the magnetic field at multiple frequencies, a resonant circuit consists of multiple values of resonant capacitors is constructed. The fabricated excitation coil showed a high homogeneity of the magnetic field and was able to maintain a constant resonant current up to 32.5 kHz.

Original languageEnglish
Pages (from-to)127-130
Number of pages4
JournalJournal of Telecommunication, Electronic and Computer Engineering
Issue number1-2
Publication statusPublished - Jan 1 2018


  • Coil
  • Impedance
  • Magnetometer
  • Resonant Circuit

ASJC Scopus subject areas

  • Hardware and Architecture
  • Computer Networks and Communications
  • Electrical and Electronic Engineering


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