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.
The Diminishing Role of Social Work Administrators in Social Service Agencies
ABSTRACT The social service industry in the United States has experienced tremendous growth and change since the early 1970s. Unfortunately, the social work profession has not kept up with this growth and change. This article explores several issues that have emerged in social work administration that may contribute to the seemingly diminished role of social workers in administrative positions in social service agencies. They include the role that schools of social work play in educating social workers for administration, competition for administrative positions in social service agencies, and the differences which exist between administration in social service agencies and other types of organizations.