Bandwidth enhancement of a wearable UWB antenna near a human arm. Issue 12 (23rd September 2013)

• Record Type: Journal Article
• Authors: Koohestani, Mohsen; Pires, Nuno; Skrivervik, Anja K.; Moreira, Antonio A.
• Is Part Of: Microwave and optical technology letters. Volume 55:Issue 12(2013:Dec.)
• Page Start: 2965
• Page End: 2967
• Publication Date: 2013-09-23
• Subjects: Microwaves -- Periodicals; Optics -- Periodicals; 621
• DOI: 10.1002/mop.27970
• Languages: English
• ISSNs: 0895-2477

Abstract

<abstract abstract-type="main"> <title>ABSTRACT</title> <p>A dielectric sandwich loading technique is proposed to enhance impedance matching bandwidth of an antenna when it is placed close to the human body. This technique mitigates the body influence by confining the reactive fields in the dielectric loads. This has no side effects on the antenna performance. Unloaded and loaded prototypes of a recently developed UWB antenna have been measured both in free space and near a human arm. Free space results confirm that loading the antenna neither detune |S₁₁| nor decrease efficiency. It was found that in a body proximity scenario, loading the antenna increases the impedance matching by 22% with respect to the unloaded antenna. These results show the suitability of this technique to design antennas for WBAN applications. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:2965–2967, 2013</p> </abstract>