Unique techniques are being utilized to develop self-contained imaging radiometers operating at single and multiple frequencies near 35, 95 and 183 GHz. These techniques include medium to large antennas for high spatial resolution, low-loss open structures for RF confinement and calibration, wide bandwidths for good sensitivity, plus total automation of the unit operation and data collection. Applications include: detection of severe storms, imaging of motor vehicles, and the remote sensing of changes in material properties. The radiometric imaging system of principal interest in this report makes use of both 35 and 95 GHz receivers, both vertical and horizontal polarizations, an elevation-over-azimuth antenna positioner, highly automated scanning and data acquisition routines, real-time TV display of scene being scanned, and immediate color display of recorded radiometric images. The RF sections make use of Rexolite lenses for low loss beam confinement, and use low loss reflective metallic surfaces for both Dicke chopping and calibration beam selection.