application in adaptive antenna systems, where variable phase shifters are used to steer the
directivity of the antenna array. The circuit is fabricated in 0.8/spl mu/m silicon bipolar
technology, with a 10 GHz f/sub T/. The resulting chip area is small enough to allow 16
complete phase shifter circuits to be included in a single package, thereby allowing control
of an array of 16 antenna elements. This approach in constructing adaptive antenna is …