The detuning effects of a wrist-worn antenna and design of a custom antenna measurement system

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The detuning effects of a wrist-worn antenna and design of a custom antenna measurement system

Buckley, John; McCarthy, Kevin G.; O'Flynn, Brendan; Ó Mathúna, S. Cian
Date: 2010-09-30
Copyright: (c) 2010 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.
Related: http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=5616535&isnumber=5614756
Citation: BUCKLEY, J., MCCARTHY, K. G., O'FLYNN, B. & O'MATHUNA, C. The detuning effects of a wrist-worn antenna and design of a custom antenna measurement system. 2010 European Microwave Conference (EuMC), Paris, France, 28-30 Sept. 2010. 1738-1741.

Abstract:

This paper investigates the effects of antenna detuning on wireless devices caused by the presence of the human body,particularly the wrist. To facilitate repeatable and consistent antenna impedance measurements, an accurate and low cost human phantom arm, that simulates human tissue at 433MHz frequencies, has been developed and characterized. An accurate and low cost hardware prototype system has been developed to measure antenna return loss at a frequency of 433MHz and the design, fabrication and measured results are presented. This system provides a flexible means of evaluating closed-loop reconfigurable antenna tuning circuits for use in wireless mote applications.

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