Antenna Array Developments: A Perspective on the Past, Present and Future

Abstract
This paper presents a historical development of phased-array antennas as viewed by the authors. Arrays are another approach to high-gain antennas as contrasted with reflector antennas. They originated a little over 100 years ago and received little attention at first. WWII elevated their importance through use in air defense. Since then, the development of computers and solid-state devices has made arrays a very valuable tool in radio-frequency systems. Radio astronomy and defense applications will continue to push the state of the art for many years.

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