川﨑 繁男

本報告では、技術試験衛星VIII型(ETS-VIII)を利用した移動体通信を想定し、車載用通信機器として、アクティブ集積アンテナを用いた地上端末の試作及び通信実験をおこなった。試作したアクティブ集積アンテナは、車両の進行方向に関わらず送受信を可能にするため、リングアレイアンテナを用いた噴水型ビームを基本形とした。他の通信機器との干渉を防止するため、送信時にビーム切換え機能を付加し、ある方位に電力を集中させた。試作品の特性が、ほぼ設計値通りであることを確認し、無線LANを用いた走行通信実験もおこない、その有効性を確認した。

In this report, the implementation and characterization of a millimeter wave Active Integrated Antenna Array is demonstrated, utilizing second harmonics for the MMIC oscillator with the multiple 3D printed PBG structure by etching. The 3D PBG structure is laminated by 2D PBG structure. The PBG was designed by computer program based on the FDTD method. The PBG structure works to suppress the leaked fundamental wave and makes improve performance of the Active Integrated Antenna Array.

In this paper, experimental results and simulation results of operating frequency shift are reported by a 10GHz HEMT oscillator with illumination. Resulting from measurement of the illuminated oscillator, it is confirmed that the operating frequency shift depends on illumination intensity. Simulation results of the oscillating with illuminated FET model showed good agreement with experimental results. As a result, the operating frequency can be controlled with illumination intensity parameters.