Ultra wide band power amplifier for miniaturized antennas

This work presents the design and the manufacturing of an ultra wide band power amplifier specially designed to deliver maximum available power to a miniaturized antenna developed for biomedical applications. The chip is designed using a low cost 0.25μm 95GHz f_max SiGe-HBT-BiCMOS process technology. The amplifier operates from 1.5GHz up to 10GHz that gives the advantage of having high resolution radar system. The amplifier has a low output impedance to match the antenna´s impedance. The measurements of the chip are performed in 50Ω system to extract the scattering parameters and simulate it with the antenna. The estimated gain is 11dB with input reflection coefficient less -10dB and serves as a matching network between the 50Ω input and the low impedance antenna. The maximum estimated output power of the amplifier is 5.5dBm at frequency 8GHz with power added efficiency of 3%. The chip consumes a low power of 96mW and has an area of 0.84mm².