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Miniaturisation of printed inverted-F antenna using chip coupler for Bluetooth applications

Miniaturisation of printed inverted-F antenna using chip coupler for Bluetooth applications

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A design for a printed inverted-F antenna (IFA) miniaturised by loading a ceramic chip coupler and to be used in Bluetooth applications is presented. The chip coupler is composed of printed meander lines on the surfaces of the ceramic (ɛr=21) chip. The proposed printed IFA with the chip coupler reduces the size of the general type printed IFA by up to 68.3%. The antenna has a volume of 35.1 mm3. The −10 dB bandwidth was measured as 90 MHz (3.68%). The measured radiation pattern shows omnidirectional patterns in the yz-plane and xy-plane.

References

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      • Zhao, A., Xue, J., Jing, C., Salo, A.: `The use of murata ceramic bluetooth antenna for wrist device based on flexible printed circuit boards', Proc. of 1st European Wireless Technology Conf., October 2008, Amsterdam, The Netherlands, p. 334–337.
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      • Lee, H., Kim, J., Woo, J.-M.: `Printed type inverted F antenna', Proc. of KEES Autumn Microwave and Propagation Conf., September 1999, Gwangju, Korea, 22, p. 253–256, 2.
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