UBC, Inc., an engineering firm performing research, development, and limited production of advanced technology over the entire electromagnetic spectrum, specializing in millimeter wave and infrared sensors, proposes an SBIR program to provide design, supporting analysis and brass-board development leading to a w-band polarization diverse four plane monopulse radar with dynamically adjustable polarization and null planes. The proposed program builds on hardware already developed by UBC, Inc. In support terminal homing seekers for air to ground application. Additions to the existing technology provide for base band angle and polarization processing as well as preprocessing transmit receive isolation of 60 dB with post processing isolation of arbitrarily high levels when combined with signal processing techniques currently being developed by the Air Force. The near term benefit to the us government is large in that monopulse radars and trackers can be made higher performance, more versatile and cost effective in "one fell swoop". The proposed approach eliminates all RF receive hardware while adding polarization diversity and adaptive nulling to nnw radar at a reduction in cost. Phase I will provide component prove out, while Phase II will provide a full up sensor for integration with Air Force processing the proposed technique provides full MMIC compatibility.