Temperature Behavior and Compensation of Diode-Based Pre-Distortion Linearizer

This letter presents temperature behavior and compensation technique of Schottky diode and p-i-n diode based pre-distortion linearizer operating at microwave frequency. We have theoretically analyzed and experimentally demonstrated the temperature behavior of the linearizer and proposed a simple but effective temperature compensation technique. The proposed temperature compensation technique provides temperature dependent control bias to the diodes to achieve temperature invariant amplitude and phase expansion of the linearizer. Here design, simulation and test results of a temperature compensated linearizer is presented that compensates amplitude and phase variation from 6 dB and 50
$^{\circ}$
to less than 0.7 dB and 4.5
$^{\circ}$
, respectively, over a temperature range of
$-20 ^{\circ}{\rm C}$
to
$+80 ^{\circ}{\rm C}$
.