Free-Space Millimeter-Wave Electro-optic Modulators Using Quasi-Phase-Matching Gap-Embedded-Patch-Antennas on Low Dielectric Constant Substrate

  • Yusuf Nur Wijayanto
  • Atsushi Kanno
  • Hiroshi Murata
  • Tetsuya Kawanishi
  • Naokatsu Yamamoto
  • Yasuyuki Okamura
Conference paper
First Online:
Part of the Springer Proceedings in Physics book series (SPPHY, volume 181)

Abstract

Conversion devices between free-space microwave/ millimeter-wave and lightwave signals are required in Fiber-Wireless (Fi-Wi) links. In this paper, we propose a free-space millimeter-wave Electro-Optic (EO) modulator using Quasi-Phase-Matching (QPM) gap-embedded-patch-antennas on a low dielectric constant substrate. Free-space millimeter-wave signals can be received and converted directly to lightwave signals using the proposed device. It can be operated passively with no external power supply and operated with extremely low millimeter-wave losses. The QPM array structure can be adopted for improving modulation efficiency by considering the transit-time effects. The proposed device is easy connected to optical fiber, therefore Fi-Wi can be realized using the proposed device. Basic structure, analysis, and experimental results of the proposed device are discussed and reported for 40 GHz operational millimeter-wave bands.

Keywords

Electro-optic modulator Patch-antenna Quasi-phase-matching Narrow gap 
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Notes

Acknowledgements

The authors would like thanks to Dr. T. Umezawa and Mr. S. Nakajima from National Institute of Information and Communications Technology (NICT) Japan and Dr. H. Shiomi from Osaka University Japan for their constructive comments and suggestions during discussion. Thanks to Dr. Y. Ogawa from NICT Japan for his helpful supports during device fabrication.

This research activity was partly supported financially by the Ministry of Internal Affairs and Communications, Japan, for the financial support partly thru the project entitled “Research and Development of high-precision imaging technology using 90 GHz band linear cells” funded by the “Research and Development to Expand Radio Frequency Resources.”

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Copyright information

© Springer International Publishing Switzerland 2016

Authors and Affiliations

  • Yusuf Nur Wijayanto
    • 1
    • 2
  • Atsushi Kanno
    • 1
  • Hiroshi Murata
    • 3
  • Tetsuya Kawanishi
    • 1
    • 4
  • Naokatsu Yamamoto
    • 1
  • Yasuyuki Okamura
    • 3
  1. 1.National Institute of Information and Communications TechnologyKoganeiJapan
  2. 2.Indonesian Institute of SciencesCisituIndonesia
  3. 3.Osaka UniversityToyonakaJapan
  4. 4.Waseda UniversityShinjukuJapan

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