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

fYear

2015

fDate

13-15 April 2015

Firstpage

1

Lastpage

4

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless and Microwave Technology Conference (WAMICON), 2015 IEEE 16th Annual

Conference_Location

Cocoa Beach, FL

Type

conf

DOI

10.1109/WAMICON.2015.7120398

Filename

7120398