Dr.-Ing. Mohammed Ali

For modern wireless systems such as high-resolution imaging and high data-rate communication applications, wide bandwidth becomes crucial. This increases the need for broadband Front-Ends at frequencies beyond 100GHz. The D-Band (110 - 170GHz) is licensed for 6G communications and mm-resolution radar. The unity current gain frequency and the maximum oscillation frequency of modern technologies are becoming closer to the operation frequency. This imposes challenges on the design of PAs with reasonable gain and high output power. Due to the fact that the output power is limited with increasing frequency, and the signal routing losses due to the back-end-of-line, the efficiency is decreased proportional. Employing techniques to improve the power efficiency at the output 1dB compression point as well as at 6dB back-off is the scope of this research. One of the techniques is called current clamping amplifier. The idea is to control the bias point of the amplifier transistor in accordance to the input signal amplitude. This way the DC current is proportional to the signal swing. And therefore, the power added efficiency is improved. Current clamping technique as well as any other technique is to be proven and emphasized.