On the Performance of Cartesian Feedback and Feedback and Linearization Structures Operating at 28 GHz.

Some performance results of the Cartesian feedback and feedforward linearization techniques applied to a class-A power amplifier operating at 28 GHz are presented. The performance of the combination of HMMC-5040 (driver) and HMMC-5033 (Power Amplifier) is used as benchmark for simulation analysis. This analysis is addressed. to show the key aspects on spectral regrowth due to phase margin and loop gain for Cartesian feedback, and time delay, phase and gain mismatch for feedforward. A 16 QAM digital signal at 10 Mbits/s filtered with a squared raised cosine filter with α = 0, 25 is used as test signal. [ABSTRACT FROM AUTHOR]