Conference Paper

Reduced groundplane shorted patch antenna for on-body communications

Inst. of Electron., Commun. & IT (ECIT), Queen's Univ. of Belfast, Belfast, UK
DOI: 10.1109/LAPC.2009.5352402 Conference: Antennas & Propagation Conference, 2009. LAPC 2009. Loughborough
Source: IEEE Xplore


This paper introduces a compact, low profile shorted patch antenna designed for on-body communication at 2.45 GHz. The proposed antenna operates with a small (~¿/5 dimension) groundplane yet maintains a reasonable radiation efficiency of 50.9 % when in close proximity to a muscle tissue phantom. The antenna has more than sufficient impedance bandwidth for the 2.45 GHz band (126 MHz for |S11|<-10 dB), yet its overall height is only 5.75 mm or ¿/21. For on-body communications, a maximum |S21| path gain of -44.7 dB was obtained at 2.45 GHz.

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    • "The knowledge of electromagnetic properties like permittivity, permeability and loss tangent, of the fabric/textile material are very much important and should be known for the design purpose. There are conductive fabrics like Flectron, Zelt and pure copper polyester taffeta textile material, that are used for radiations whereas non conductive fabrics like felt, fleece, jeans, silk, cotton etc are used as the substrate [1], Articles in [l]-[7] has demonstrated single band wearable antennas with acceptable performance. Some of these antennas have ground plane having and inherent advantage of having less interaction with human body when worn. "
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    ABSTRACT: This paper will review the evolution of wearable textile antennas over the last couple of decades. Particular emphasis will be given to the process of embroidery. This technique is advantageous for the following reasons: (i) bespoke or mass produced designs can be manufactured using digitized embroidery machines; (ii) glue is not required and (iii) the designs are aesthetic and are integrated into clothing rather than being attached to it. The embroidery technique will be compared to alternative manufacturing processes. The challenges facing the industrial and public acceptance of this technology will be assessed. Hence, the key opportunities will be highlighted. Keywords: wearable antennas; embroidered antennas; wearable technology; inkjet printing; textiles This paper is available here:
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