An SRFT Tool to Design Broadband Microwave Amplifiers for Complex Impedance Conditions

This study introduces a sophisticated tool for designing broadband microwave amplifiers, leveraging the Simplified Real Frequency Technique (SRFT). Notably, the improved SRFT-based program now enables the design of microwave amplifiers between a 50 Omega generator and a complex load, such as an antenna, or vice versa. The tool achieves simultaneous optimization of input and output matching networks by integrating customized objective functions, regarding precise matching requirements. This breakthrough allows for the direct design of transmitter or receiver amplifiers, addressing real-world impedance matching challenges. Focusing on sub-6GHz applications of 5G and beyond communication systems, a demonstration of a broadband microwave amplifier design is presented. In the provided design example, a minimum 7.4dB gain and input/output reflections below -12dB are achieved over the 1.8-6.0GHz bandwidth.