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Non-invasive measurement of electrically small ultra-wideband and smart antennas.

Loh, T H (2013) Non-invasive measurement of electrically small ultra-wideband and smart antennas. In: 2013 Longhborough Antennas & Propagation Conference (LAPC), 11-12 November 2013, Loughborough, UK.

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The rapid increase in the number of compact wireless communication systems coupled with the desired to make optimum use of the limited available spectrum is driving research into a number of areas, such as electrically small and smart antennas, and wireless networks incorporating these antennas. However, there are particular challenges in assessing their antenna radiation performance when using a coaxial cable and hence the reliability of the radio links in such networks, in particular, if the coaxial cable is not part of the final product. This is due to the large distortion associated with the unwanted common mode effect from a coaxial cable. This paper presents a study on non-invasive measurement of electrically small and smart antennas. To ensure accuracy and repeatability throughout traceable measurements of the radiation pattern performance of these antennas an electro-optical (EO) transducer and an Opto-Electric Field Sensor (OEFS) system were employed within a fully anechoic chamber. An electrically small ultra-wide band (UWB) antenna and an electrically small electronically beam-steerable parasitic array radiator (ESPAR) smart antenna were assessed. Numerical results for their radiation patterns are compared with the measured results using an EO transducer or a cable.

Item Type: Conference or Workshop Item (UNSPECIFIED)
Subjects: Electromagnetics
Electromagnetics > Wireless Communications
Identification number/DOI: 10.1109/LAPC.2013.6711941
Last Modified: 02 Feb 2018 13:14
URI: http://eprintspublications.npl.co.uk/id/eprint/6087

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