Broadband excitation of spin wave using microstrip line antennas for integrated magnonic devices

Kanta Mori, Taichi Goto, Toshiaki Watanabe, Takumi Koguchi, Yuichi Nakamura, Pang Boey Lim, Alexey B. Ustinov, Mitsuteru Inoue

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


Strong- and broadband-spin wave (SW) excitation/detection structures are useful for magnonic devices. In particular, such structures are essential for observing magnonic bandgaps of magnonic crystals (MCs). Therefore, this study proposes a manufacturable broadband-SW excitation/detection antenna structure suitable for evaluating MCs. The antenna structure comprises a microstrip line fabricated on a yttrium iron garnet on a metal-covered silicon substrate. Calculations were performed using a three-dimensional finite integration technique and dispersion curves of SWs. The proposed structure exhibited high performance because of the significantly short distance between the signal line and ground plane. The generated bandwidth was ∼1.69 GHz for the 8.9 μm-wavelength SW at a frequency of 4 GHz. This work proposed an appropriate antenna structure for observing magnonic bandgaps, showing high potential for the development of MCs in integrated SW devices.

Original languageEnglish
Article number115002
JournalJournal of Physics D: Applied Physics
Issue number11
Publication statusPublished - 2022 Mar 17
Externally publishedYes


  • forward volume spin wave
  • magnetostatic wave
  • magnonic crystal
  • YOM substrate
  • yttrium iron garnet

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Acoustics and Ultrasonics
  • Surfaces, Coatings and Films


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