Low-Power, Integrated Radar Proximity Sensor for Fuzing

Period of Performance: 03/06/2000 - 03/06/2002

$729K

Phase 2 SBIR

Recipient Firm

Hittite Microwave Corp.
20 Alpha Road
Chelmsford, MA 01824
Principal Investigator

Abstract

Single-chip MMICs that perform all RF Front-end functions of FN-CW radar's are used as proximity sensors in the new generation of fuses in artillery and mortar munitions. To extend this technology to proximity fuses in small to medium caliber munitions and sub-munitions, it is now necessary to develop novel techniques for lower power consumption and further miniaturization by expansion of scale of integration combining RF and signal processing techniques for lower power consumption and further miniaturization by expansion of scale of integration combining RF and signal processing circuits. This proposal describes Hittite'5 strategy of using both unique signal processing techniques and a newly emerging semiconductor process to provide an optimal solution to both power consumption and integration scale. The optimal process technology is identified as SiGe/CMOS. The new semiconductor process includes both bipolar and a CMOS device as is the case in traditional BiGMOS but the bipolar device has an enhanced Ft due to germanium doping. Thus, this process is ideally suited to incorporate SiGe bipolar circuits for the front end along with low power consumption CMOS circuits for IF and digital processing. Also Hittite has developed processing algorithms for accurately tracking target position using a single wide-angle antenna. The algorithm effectively increases the range resolution by a factor of 50 for a single target while maintaining the same frequency deviation. Thus, low frequency VCOs with only modest tuning ranges can be used to achieve the 6" HOB program goal. The proposed program will result in the development of a SiGe/CMOS FM-CW MMIC including RF and IF circuitry. Furthermore, the chip will be integrated in a bread board to demonstrate the fuzing performance. BENEFITS: Products to be derived from the proposed program are integrated sensors for proximity sensing, object detection, range sensing, etc. Commercial applications of those sensors include: vehicular sensors of approach control, blind-zone sensing, crash sensing, etc., area access control. liquid level control, traffic control, etc.