Automatic Phase Alignment for High Bandwidth Cartesian Feedback Power Amplifiers
نویسنده
چکیده
Presently there exists a great demand for wireless systems that achieve high data transmission rates while using as little power and bandwidth as possible. Maximum data transfer for a given channel width demands sophisticated modulation techniques, the best of which require a linear power amplifier (PA). The strong tradeoff between linearity and power efficiency in PA’s has motivated research into linearization techniques, of which Cartesian feedback is an important and promising example [l], [2]. Figure 1 shows a t.ypical Cartesian feedback system.
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