Electromagnetic model of a near-field cable-free impedance and gain measurement technique for electrically small antennas

Jiaying Zhang, Sergey Pivnenko, Olav Breinbjerg

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Abstract

In this paper, a novel near-field cable-free impedance and gain measurement technique for electrically small antennas is proposed. In this technique, with the electrically small antenna placed in the near-field region of the probe, the properties of this antenna are extracted by measuring the signal scattered by it when it is loaded in turn with three known loads. The determination of the antenna impedance and gain is formulated by using the spherical wave expansion technique. The advantages of this measurement technique are summarized as follows. First, the limited dynamic range problem is avoided by the measurement close to the probe. As a result of this, the effect of noise is reduced and the measurement accuracy is improved significantly. Second, only a compact anechoic environment is required, which is easy to build. The expense of this technique is the increased complexity of the model.
Original languageEnglish
Title of host publicationProceedings of the 5. European Conference on Antennas and Propagation
PublisherIEEE
Publication date2011
Pages3596-3600
ISBN (Print)978-1-4577-0250-1
Publication statusPublished - 2011
Event5th European Conference on Antennas and Propagation - Rome, Italy
Duration: 11 Apr 201115 Apr 2011
Conference number: 5
http://www.eucap2011.org/

Conference

Conference5th European Conference on Antennas and Propagation
Number5
CountryItaly
CityRome
Period11/04/201115/04/2011
Internet address

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