Operational Mode of Millimeter-Wave Phase Shifter Using Liquid Crystal Materials with Coplanar Waveguide

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概要

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• A planar circuit type of a liquid crystal (LC) phase shifter is prepared using a coplanar waveguide (CPW) and an indium–tin-oxide (ITO) glass substrate. Since the upper ITO layer is set with a floating structure, the LC molecular orientation can be modulated by driving only the lower CPW electrodes. The upper floating electrode contributes extremely well to reducing the driving voltage of the device compared with the case without the electrode. However, the extra electrode increases the loss of the millimeter-wave (MMW) propagation and principle of the device operation has not been made clear yet. We investigate here the electric filed distribution phenomena of the propagating MMW inside the LC cell by finite difference time domain method (FDTD) calculation. Relationship between the LC molecular orientation and the MMW phase shifting properties are discussed in terms of the MMW propagation mode in the CPW device.

• Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
• 2007-03-15

著者

• Honma Michinori

  Akita Prefectural University

• NOSE Toshiaki

  Akita Prefectural University

• YANAGIHARA Susumu

  Akita Prefectural University

• Yanagihara Susumu

  Akita Prefectural University, Yuri-Honjyo, Akita 015-0055, Japan

• Honma Michinori

  Akita Prefectural University, Yuri-Honjyo, Akita 015-0055, Japan

関連論文

• Operational Mode of Millimeter-Wave Phase Shifter Using Liquid Crystal Materials with Coplanar Waveguide
• Improvement of Phase-Shifting Properties in Coplanar Waveguide-Type Liquid Crystal Millimeter-Wave Phase Shifter by Introducing a Resonant Phenomenon
• Operational Mode of Millimeter-Wave Phase Shifter Using Liquid Crystal Materials with Coplanar Waveguide

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