Diffraction Radiation Antenna for 8-mm Waveband Radar Meant for Airfield Observation
High-resolution millimeter wave radars become an essential part of ground safety systems. Among them, radar systems for airfield traffic control are of special interest. The diffraction radiation antenna has been designed for it, using novel technology. The antenna consists of a ridged dielectric waveguide, diffraction grating, and focusing lens. The eigenwave of the ridged dielectric waveguide excites resonant oscillations in the elements of the diffraction grating.
A novel W-band radar for airport traffic monitoring: implementation, first operational results, perspectives
High resolution requirements for airport surface traffic monitoring with lightweight, small, all-weather sensors call for the use of a network of millimetre-wave radars to perform the surveillance function in the surface movement control and guidance system. In this paper a W-band radar employed as the basic sensor is described. Some results of recent and present field trials are reported.
Experimental study of thermal modeling for stratospheric platform airships
R&D work on the Japanese stratospheric platform airship is discussed from the viewpoint of the thermal modeling. The work includes two experiments on the thermal characteristics of the 25m-long airship and the 35m-long PV-equipped airship model. The validity of the current thermal model was confirmed by comparing the calculated results with the measured data. The other important work is the Ground-to-Stratosphere (GTS) flight test. A 47mlong airship-shaped balloon was flown to the stratosphere. The flight simulation program into which the thermal model was integrated, was developed and applied successfully to predict the ascent behavior and the flight trajectory.