Reconfigurable frequency with circular polarization for on-body wearable textile antenna

Shakhirul, M. S.; Jusoh, M.; Ismail, A. H.; Kamarudin, M. R.; Rahim, Hasliza A.; Sabapathy, Thennarasan

doi:10.1109/eucap.2016.7481619

Cited by 9 publications

(7 citation statements)

References 10 publications

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“…A challenge of the switching between these two ports is addressed by introducing a single pole single throw switch to the structure. DC circuits are integrated in different parts of antenna such as ground plane [1,58] or within the structure. In References [25,59], DC control circuits are integrated within commercial snap-on buttons.…”

Section: Antennas Based On Electrical Switchesmentioning

confidence: 99%

“…The antenna is placed on jeans substrate with ε r = 1.7 and an adhesive copper tape is used as a radiating element and ground plane (Figure 8). In References [1] and [58], the frequency reconfigurability is achieved by manipulating the slot size at the ground plane of the truncated edges of the rectangular patch textile antenna. In Reference [1], three diodes are integrated on a slot at the ground plane of a textile antenna to switch between six frequencies: 1.57 GHz, 1.67 GHz, 1.68 GHz, 2.43 GHz, 2.50 GHz, and 2.55 GHz.…”

Section: Frequency and Polarization Reconfigurabilitymentioning

confidence: 99%

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Recent Developments and State of the Art in Flexible and Conformal Reconfigurable Antennas

et al. 2020

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Reconfigurable antennas have gained tremendous interest owing to their multifunctional capabilities while adhering to minimalistic space requirements in ever-shrinking electronics platforms and devices. A stark increase in demand for flexible and conformal antennas in modern and emerging unobtrusive and space-limited electronic systems has led to the development of the flexible and conformal reconfigurable antennas era. Flexible and conformal antennas rely on non-conventional materials and realization approaches, and thus, despite the mature knowledge available for rigid reconfigurable antennas, conventional reconfigurable techniques are not translated to a flexible domain in a straight forward manner. There are notable challenges associated with integration of reconfiguration elements such as switches, mechanical stability of the overall reconfigurable antenna, and the electronic robustness of the resulting devices when exposed to folding of sustained bending operations. This paper reviews various approaches demonstrated thus far, to realize flexible reconfigurable antennas, categorizing them on the basis of reconfiguration attributes, i.e., frequency, pattern, polarization, or a combination of these characteristics. The challenges associated with development and characterization of flexible and conformal reconfigurable antennas, the strengths and limitations of available methods are reviewed considering the progress in recent years, and open challenges for the future research are identified.

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Section: Antennas Based On Electrical Switchesmentioning

confidence: 99%

Section: Frequency and Polarization Reconfigurabilitymentioning

confidence: 99%

Recent Developments and State of the Art in Flexible and Conformal Reconfigurable Antennas

et al. 2020

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“…Pattern reconfigurable antennas are directional in nature as they can change their beam direction, depending upon the requirements of the system. Directional antennas also have better signal sensitivity and long-range communication [7].…”

Section: Pattern Reconfigurable Antenna For On Body Communicationmentioning

confidence: 99%

“…Shakhirul et al [7] presented the design for reconfigurable frequency antennas with usage of textile material in addition to circular polarization. Radiating element in the described antenna was Shield it Super whereas the thickness of the fabric was 1.7 mm.…”

Section: Textile Integrated Wearable Antennasmentioning

confidence: 99%

An Overview of Reconfigurable Antennas for Wireless Body Area Networks and Possible Future Prospects

Munawar¹

2020

IJWMT

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The use of antennas in various fields and applications is gaining much importance because of their growing advancements and numerous facilities. Due to their vast advantages, now wearable antennas are used in fields of personal healthcare, entertainment, military and many others. For the fabrication of wearable antennas, many aspects need special consideration in order to manufacture a safe system for the user. As the applications of wireless body centric communication with antennas has a great variability, so enhancements are made in the systems by integrating reconfigurable antennas in it. These antennas work better than the single installed antennas because of their adjustable parameters thus increasing the performance of whole system. This paper provides an overview of the existing antennas and their applications, in order to better understand ways in which the limitations associated with wearable antennas could be overcome in the future. Certain design challenges which occur during the fabrication of wearable antennas like safety, cost and tolerance in addition to the recent advancements in this field are discussed. Designing a particular antenna for body area network mainly depends upon the application of the user and the place of installation. To build a review about the reconfigurable antenna for body centric communication, 15 papers from the last 6 years are consulted which fall under the domain of wearable antennas. There is still a margin of improvement in this field and better technologies will be introduced in coming years which include precision medicine.

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“…In the literature, there is a descent number of publications including smart and compact designs of reconfigurable textile wearable antennas that, for example, can switch between on/offbody modes, change the frequency of operation, vary their radiation patterns and/or polarisation, using flexible materials [11][12][13][14][15][16][17][18]. Most of the research publications deal with electrically reconfigurable antennas [19][20][21] in order to change the radiation pattern, polarisation, and resonant frequencies of the antenna between the on-body and off-body communication modes.…”

Section: Introductionmentioning

confidence: 99%

Use of conductive zip and Velcro as a polarisation reconfiguration means of a textile patch antenna

Tsolis

Michalopoulou

Alexandridis

2020

IET Microwaves, Antennas & Propagation

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Α feasibility study of using components such as conductive Velcro tape and zip fastener to change the polarisation of a textile patch antenna from linear (LP) to circular (CP) is presented. The antennas are designed to operate at 2.3–2.5 GHz frequency band, are made using felt substrate and conductive cloth and their size is 100.4 mm × 74.2 mm × 4.26 mm. It is proved, via simulations and measurements, that such components are strong candidates as means for polarisation reconfiguration of textile antennas. Both Velcro and zip textile patch antennas at the LP mode yield axial ratio (AR) larger than 10 dB at the operating frequency range. In the CP mode, the Velcro antenna gives AR equal to 3.1 dB at 2.35 GHz and the zip antenna 1 dB at 2.31 GHz. Repeatability measurements of interchanging polarisation modes (LP–CP) for both antennas have been conducted presenting acceptable repeatability. Great advantage of both antennas (Velcro and zip) is that the polarisation can be changed at will by a simple manipulation (detach the Velcro or unzip); thus, providing to the user the flexibility of adjusting the antenna characteristics depending on wearable application and environment of operation.

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Reconfigurable frequency with circular polarization for on-body wearable textile antenna

Cited by 9 publications

References 10 publications

Recent Developments and State of the Art in Flexible and Conformal Reconfigurable Antennas

Recent Developments and State of the Art in Flexible and Conformal Reconfigurable Antennas

An Overview of Reconfigurable Antennas for Wireless Body Area Networks and Possible Future Prospects

Use of conductive zip and Velcro as a polarisation reconfiguration means of a textile patch antenna

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