Abstract
Radars and their associated antennas evolved more or less independently for a number of years, but a gradual marriage began in the 1960s with the advent of improved and relatively cheap signal-processing techniques. Today's advanced radars with electronically steered beams, incorporating T/R modules and signal-processing equipment at the array elements, appear to be the realisation of the early pioneers' pipe dreams. Part 1 of this paper provides a brief review of developments to date and examines some of the trade-offs required in the design of radar systems for various functions. Part 2* concentrates on antenna characteristics affecting radar design and provides some pointers to future trends.
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