Abstract
Abstract. Short range inductive data transfer has become very popular in the last years with the increased interest in technologies like RFID and NFC. Additionally, wireless power transfer has been a field of intensive research and product development. In industrial applications, a combination of both is often needed to replace mechanical contacts, mainly for safety and reliability reasons, especially regarding spark prevention and maintenance reduction. In this paper, we present a compact inductive structure that can be implemented in an existing wireless energy transfer system. The structure is developed by field considerations, leading to a single structure comprising two signal ports that are decoupled from each other, but can be used to transfer a signal to a second structure of that kind with very small interference. An optimisation to achieve comparable channel characteristics is conducted by using 3-D field simulations. Subsequent measurements are conducted to verify the achieved performance.
Highlights
In a current research project, our goal is to develop an inductively coupled full-duplex data transfer system to be be implemented in an existing wireless power transfer system
Short range inductive data transfer has become very popular in the last years with the increased interest in technologies like RFID and near field communication (NFC)
1 Introduction In a current research project, our goal is to develop an inductively coupled full-duplex data transfer system to be be implemented in an existing wireless power transfer system
Summary
In a current research project, our goal is to develop an inductively coupled full-duplex data transfer system to be be implemented in an existing wireless power transfer system. Due to the given size of the power transfer system, the data coupling structure needs to be compact while achieving good crosstalk performance to enable full-duplex data transfer in the range of tens of megabit per second. The nearend crosstalk () is an important measure in this application, as the two sides of the transfer system have both a transmit and a receive path that can interact with each other due to their close proximity. The structure presented makes it possible to implement a full-duplex data transfer system with low crosstalk by shaping the magnetic field distribution to achieve a good decoupling of two channels
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