A miniaturization technique of a compact omnidirectional antenna

Conference: EuCAP 2009 - 3rd European Conference on Antennas and Propagation
03/23/2009 - 03/27/2009 at Berlin, Germany

Proceedings: EuCAP 2009

Pages: 5Language: englishTyp: PDF

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Delaveaud, C.; Sufyar, S. (CEA-LETI MINATEC, 38054 Grenoble, France)

This paper discusses a miniaturization technique of a compact omnidirectional antenna. A slot loading technique is applied to a well-know low-profile antenna structure whose radiation characteristics are similar to equivalent monopole ones. The typical dimensions (width x height) of the obtained antenna are lambda0/11 x lambda0/75 (lambda0 being the free space operating wavelength) which makes it a miniature antenna that can be integrated inside small wireless sensor nodes using narrow band communication systems. Its performances are in accordance with classical fundamental limits, the operating bandwidth and efficiency are significantly reduced with the antenna miniaturization.