Influence of nonlinear property for the microwave adaptive interference cancellation system

Several differences between the low-frequency interference cancellation mod el and the microwave interference cancellation model are investigated in th is paper; with emphasis on their effects on the interference cancellation r atio and weight converging speed. When comparing the results of the compute r imitation with measurements for a real microwave interference cancellatio n system, it can be seen that the nonlinear property of the microwave mixer s limits the weight converging speed, the finite maximum attenuation of the microstrip balun bipolar p-i-n diode voltage-controlled attenuator limits the interference cancellation ratio, and the weights oscillate because of t he mixers used in the system. (C) 1999 John Wiley & Sons, Inc.