Title :
The Power Smith Tube: Joint optimization of power amplifier input power and load impedance for power-added efficiency and adjacent-channel power ratio
Author :
Barkate, Joseph ; Fellows, Matthew ; Barlow, Jennifer ; Baylis, Charles ; Marks, Robert J.
Author_Institution :
Wireless & Microwave Circuits & Syst. Program, Baylor Univ., Waco, TX, USA
Abstract :
A new visualization tool for design is introduced: the Power Smith Tube. It provides aid in designing for optimum power-added efficiency (PAE) while meeting adjacent-channel power ratio (ACPR) requirements. The Power Smith Tube is a three-dimensional cylindrical extension of the Smith Chart with input power as the vertical axis. As such, this Smith Tube allows the visualization of design metrics, such as PAE and ACPR, as a function of both input power and load impedance. Performance of load-pull measurements or simulations at multiple values of input power provides data for the design. Design examples using the Power Smith Tube based on both simulation and measurement data are presented to demonstrate selection of load impedance and input power providing the highest PAE under ACPR constraints.
Keywords :
circuit optimisation; integrated circuit design; power amplifiers; 3D cylindrical extension; ACPR; PAE; Power Smith Tube; Smith Chart; adjacent-channel power ratio; load impedance; load-pull measurements; optimum power-added efficiency; power amplifier input power; visualization tool; Electron tubes; Impedance; Impedance measurement; Load modeling; Power measurement; Visualization; Smith Chart; adjacent-channel power ratio; load-pull; optimization; power amplifiers; power-added efficiency;
Conference_Titel :
Wireless and Microwave Technology Conference (WAMICON), 2015 IEEE 16th Annual
Conference_Location :
Cocoa Beach, FL
DOI :
10.1109/WAMICON.2015.7120398
