Shigeo Kawasaki

In t his report, as one of the applicable technique, an active integrated antenna in the automotive communication units for engineering test satellite VIII (ETS-VIII) was demonstrated with experimental data from test fabrication and communication experiment for mobile communication. The active integrated antenna provided fountain beam pattern by ring array alignment, so as to communicate without restriction of vehicle running direction. The six element active integrated antenna operated with function of beam switching to concentrate radiation power to optimum direction and to prevent interference to another communication units. Specification of the active integrated antenna as design performance was checked, and experiments of communication with automotive were carried out.

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.