DID YOU KNOW? DTIC has over 3.5 million final reports on DoD funded research, development, test, and evaluation activities available to our registered users. Click HERE
to register or log in.
W-Band Polarimetric Monopulse Tracking Receiver
MICHIGAN UNIV ANN ARBOR DEPT OF ELECTRICAL ENGINEERING AND COMPUTER SCIENCE
Pagination or Media Count:
A planar 94 GHz monopulse receiver has been integrated on a single chip. The receiver is based on four planar antennas followed by four planar subharmonic mixers. The output of the mixers is taken to an IF monopulse processor at 2-4 GHz so as to achieve very deep nulls. The performance of the monopulse receiver has been measured at 94 GHz and resulted in a system NF of around 15 dB, and better than -40 dB nulls in the elevation and difference patterns. Furthermore, the null is maintained at lower than -20 dB over 2 GHz bandwidth. This represents the highest performance monopulse receiver to-date in a planar implementation and is competitive with waveguide systems at W-band frequencies. Also, we have developed novel distributed wideband MEMS phase shifters suitable for 2-100 GHz applications. The distributed MEMS phase shifters resulted in excellent performance at 40-100 GHz. with an insertion loss of better than 4 dB for a 360 deg. phase shift. To our knowledge. this represents the best phase shifter performance at these frequencies using any technology diode, HEMT, MEMS.
APPROVED FOR PUBLIC RELEASE