Millimeter-wave beam former using liquid crystal

Hirokazu Kamoda, Takao Kuki, Hideo Fujikake, Toshihiro Nomoto

研究成果: Article査読

5 被引用数 (Scopus)


By using liquid crystal, a beam former is fabricated and evaluated that can electrically steer the beam direction at millimeter wave frequencies. The beam former is constructed by alternately stacking liquid crystal and copper foil layers. By using a membrane impregnated with liquid crystal as the liquid crystal layer, a simple configuration is realized that does not require a solid substrate or spacer. In the experiment, it is found that the maximum phase shift is about-420° at 60 GHz and the beam steering angle is about ±13°. The structure works in a broad bandwidth from 50 to 75 GHz. The structure is also used as a dielectric lens to correct the phase distribution of electromagnetic waves fed from a pyramidal horn antenna. It is therefore demonstrated that various beam forming functions can be obtained. On the other hand, the insertion loss is 5 to 8 dB. To reduce the loss, it may be necessary to reduce the dielectric loss of the liquid crystal at millimeter wave frequencies.

ジャーナルElectronics and Communications in Japan, Part II: Electronics (English translation of Denshi Tsushin Gakkai Ronbunshi)
出版ステータスPublished - 2005 8月 1

ASJC Scopus subject areas

  • 物理学および天文学(全般)
  • コンピュータ ネットワークおよび通信
  • 電子工学および電気工学


「Millimeter-wave beam former using liquid crystal」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。