Compact Size Wireless Power Transfer Using Defected Ground Structures

verfasst von: Dr. Sherif Hekal, Dr. Ahmed Allam, Dr. Adel B. Abdel-Rahman, Dr. Ramesh K. Pokharel

Verlag: Springer Singapore

Buchreihe : Energy Systems in Electrical Engineering

Enthalten in: Springer Professional "Wirtschaft+Technik" , Springer Professional "Technik"

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Über dieses Buch

This book addresses the design challenges in near-field wireless power transfer (WPT) systems, such as high efficiency, compact size, and long transmission range. It presents new low-profile designs for the TX/RX structures using different shapes of defected ground structures (DGS) like (H, semi-H, and spiral-strips DGS). Most near-field WPT systems depend on magnetic resonant coupling (MRC) using 3-D wire loops or helical antennas, which are often bulky. This, in turn, poses technical difficulties in their application in small electronic devices and biomedical implants. To obtain compact structures, printed spiral coils (PSCs) have recently emerged as a candidate for low-profile WPT systems. However, most of the MRC WPT systems that use PSCs have limitations in the maximum achievable efficiency due to the feeding method. Inductive feeding constrains the geometric dimensions of the main transmitting (TX)/receiving (RX) resonators, which do not achieve the maximum achievable unloaded quality factor. This book will be of interest to researchers and professionals working on WPT-related problems.

Inhaltsverzeichnis

Frontmatter

Chapter 1. Introduction

Abstract

Wireless power transmission (WPT) is defined as the transmission of electrical power from a power transmitter to one or more electrical loads, such as a network of wireless sensors or electronic devices, without the use of interconnecting cables or conductive wires. The wireless sensor networks hidden in bridges or buildings to track the effect of heavy loads and environmental changes on the structure strength [1‐4], are an example of the importance of WPT. WPT is crucial for implanted biomedical devices in order to avoid performing surgical procedures to replace the battery [5]. WPT systems can be implemented by different power transmission techniques that employ time-varying magnetic, electric, or electromagnetic fields. In these systems, the power transmitter (resonator or antenna) is connected to a power source, which transfers the field energy across an intermediate space to one or more receivers, where it is converted back to an electrical current and then exploited [6].