Novel Design Methodology for High Efficiency Class E Microwave Frequency Triplers

High efficiency Class-E Power Amplifiers (PA) are difficult to analytically design using the original design equations. We present a high frequency (HF) Class-E PA design methodology that simplifies design in this thesis. A high-efficiency Class-E PA was designed using a low-cost power FET by following this design-flow. Due to their small size, it’s difficult to design efficient MCR-WPT resonators for portable electronics. We propose a novel multi-layer MCR-WPT Printed Spiral Coil (PSC) design and design methodology. Two MCR-WPT PSC resonators were designed for smartphones and tablets to meet the Rezence Self-Resonant Frequency and efficiency specifications using this novel design and design methodology. The MCR-WPT resonators power transfer efficiency is reduced when their separation distance is below the optimal Critical Coupling Distance (CCD) due to frequency splitting. We present a novel maximum-peak detection and auto-tuning circuit that automatically improves efficiency using capacitive tuning when the separation distance is below the CCD.

Download Full-text

Magnetically coupled resonant wireless power transmission system that meets the Rezence efficiency and frequency specification

10.32920/ryerson.14661039.v1 ◽

2021 ◽

Author(s):

Jean-Claude Leslie Clarke

Keyword(s):

Design Methodology ◽

High Efficiency ◽

Power Transmission ◽

Low Cost ◽

Separation Distance ◽

Design Flow ◽

Original Design ◽

Spiral Coil ◽

Capacitive Tuning ◽

Class E

High efficiency Class-E Power Amplifiers (PA) are difficult to analytically design using the original design equations. We present a high frequency (HF) Class-E PA design methodology that simplifies design in this thesis. A high-efficiency Class-E PA was designed using a low-cost power FET by following this design-flow. Due to their small size, it’s difficult to design efficient MCR-WPT resonators for portable electronics. We propose a novel multi-layer MCR-WPT Printed Spiral Coil (PSC) design and design methodology. Two MCR-WPT PSC resonators were designed for smartphones and tablets to meet the Rezence Self-Resonant Frequency and efficiency specifications using this novel design and design methodology. The MCR-WPT resonators power transfer efficiency is reduced when their separation distance is below the optimal Critical Coupling Distance (CCD) due to frequency splitting. We present a novel maximum-peak detection and auto-tuning circuit that automatically improves efficiency using capacitive tuning when the separation distance is below the CCD.

Download Full-text

Design Methodology of the Class-E Power Amplifier with Finite Feed Inductance—A Tutorial Approach

Applied Sciences ◽

10.3390/app10248765 ◽

2020 ◽

Vol 10 (24) ◽

pp. 8765

Author(s):

Ingrid Casallas ◽

Carlos-Ivan Paez-Rueda ◽

Gabriel Perilla ◽

Manuel Pérez ◽

Arturo Fajardo

Keyword(s):

Analytical Model ◽

Power Amplifier ◽

Design Methodology ◽

High Efficiency ◽

Design Procedure ◽

Mathematical Tool ◽

Design Procedures ◽

Iterative Design ◽

Amplifier Design ◽

Class E

The Class-E with finite feed inductance is a high-efficiency power amplifier that generally uses complex, long, and iterative design procedures. In this paper, we detail a design methodology that is based on an analytical model of this amplifier. This methodology explores the power amplifier design by the use of a symbolic mathematical tool, which was developed in the software Maple™. This approach helps to understand the Class-E circuit topology and it offers a fast and easy design procedure without having to examine, in-depth, the model analytical equations.

Download Full-text