Preamble This is the final report to Lockheed Martin on the requirements for a phased array weather radar. Discussed herein are those meteorological requirements that need to be met by weather radars having either reflector type antennas or active phased array elements. These requirements impact the design of the antenna, the transmitter-receiver, and signal processor. Justifications for these ...

A MIMO (multi-input multi-output) radar system, unlike a standard phased-array radar, can transmit via its antennas multiple probing signals that may be correlated or uncorrelated with each other. We provide herein an overview of our recent result, showing that this waveform diversity enables the MIMO radar superiority in several fundamental aspects, including: 1) significantly improved paramet...

In this paper we report on t h e relationship between track update intervals and track accuracy in a Multifunction phased array radar system. Strategies for selecting the update rate are highlighted and the degradation o f performance as update rate reduces is demonstrated. It is shown that using suitable techniques considerable radar resources can be liberated f o r non-tracking tasks.

Antenna tilt angles having a relation to element spacings are among the important radar design parameters. The optimum tilt angles are derived theoretically: four types of uniform and nonuniform linear arrays are considered and Chebyshev array factors are used as a nonuniformly excited array case.

Tripulse is a novel orientation/attitude estimation system that is designed to accurately estimate the orientation of a satellite borne phased array relative to one or more earth stations. This system has an accuracy potential that is signi cantly better than conventional Earth-Moon-Sun attitude sensors. Tripulse has conceptual similarities to amplitude comparison monopulse systems used in trac...

Modern microwave and millimeter wave phased array antennas are attractive because of their ability to steer wave beams in space without physically moving the antenna element. A typical phased array antenna may have several thousand elements fed by a phase shifter for every antenna, which can steer the resulting array beam to different directions. Their low loss, low cost and lightweight phase s...

In this chapter we describe some of the ideas being pursued in sensor scheduling as they apply to radar. A modern phased-array pulseDoppler radar has several different parameters available for scheduling: waveform, beam-shape, beam direction, pulse repetition interval, etc. Choice of different values for these parameters provides different transmit modes for the radar and these modes in turn pr...

The scattering characteristics of a phased array depends on its feed network. The variation of scattered fields within the feed network affects the antenna mode scattering. In this paper, an attempt is made to determine the radar cross section (RCS) of a planar array with parallel-feed network. The scattered field of the array is obtained by following the path of the signals through the antenna...