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Abstract
60GHKz帯電子走査リフレクトアレーアンテナの試作・評価を行った.反射素子は,誘電体基板上に形成されたマイクロストリップパッチとPINダイオード1つが装荷されたスタブによって構成した.PINダイオードのON/OFF切替で,反射位相が159°変化できた.すなわち,反射素子は簡単な構造をもつ1ビットディジタル移相器として動作した.これを用いて,0.7λ間隔で配列した40×40素子で構成したリフレクトアレーアンテナを試作した.反射素子の反射係数とビーム走査特性,利得を評価した結果,測定と計算結果がほぼ一致し,1ビットディジタル移相器を用いたリフレクトアレーアンテナで,連続的な電子ビーム走査が可能であることを確認した.
A 60-GHz band electrically steerable reflectarray antenna has been investigated. Each reflecting element was printed on a dielectric substrate and had a rectangular microstrip patch and a stub loaded with a single PIN diode. The reflection phase was changed by 159° in accordance with the on/off state of the PIN diode; namely, the element worked as a single-bit phase shifter with, simple structure. A reflectarray consisting of 40×40 elements spaced at 0.7λ, was fabricated using the reflecting elements. The reflection coefficients of the elements, the radiation patterns, and the antenna gain were evaluated. Good agreement was observed between the results of the simulations and experiments and the reflectarray antenna using single bit phase shifters was confirmed to be able to electrically steer the antenna beam.
Journal
- IEICE technical report. Microwaves [List of Volumes]
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IEICE technical report. Microwaves 109(210), 7-12, 2009-09-18 [Table of Contents]
The Institute of Electronics, Information and Communication Engineers
