A polarization reconfigurable textile patch antenna for wearable IoT applications

Lee, Hojoo; Choi, Jaehoon

doi:10.1109/isanp.2017.8228882

Cited by 13 publications

(10 citation statements)

References 3 publications

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“…The mismatch is because of the alteration of position and orientation of the two antennas. The polarization reconfigurability is a feature that compensates this power loss by matching the antenna's polarization [101]. Polarization reconfigurability can be achieved by changing the shape of the radiating patch [101], switching between different radiators [102] and changing the antennas shape [103][104][105][106][107].…”

Section: Polarization-reconfigurable Antennasmentioning

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: Polarization-reconfigurable Antennasmentioning

confidence: 99%

“…In Reference [101], three polarization modes are created by controlling the truncations on the patch by using four diodes at 2.4 GHz. The proposed textile-based antenna is placed on felt substrate.…”

Section: Polarization-reconfigurable Antennasmentioning

confidence: 99%

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

et al. 2020

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“…Switchable antennas are highly recommended and are considered attractive due to their use in integrated circuits and applications. To achieve dual-band textile reconfigurable antennas, several techniques were used, such as cutting slots [10][11][12][13] where metal parts are implanted on the fabric to create additional resonance, although degrading the performance due to an uncontrolled SAR value and bending conditions. A flexible and compact antenna operating at 2.45 GHz and 5.25 GHz bands can be fabricated on a blue jean substrate, as discussed by Farooq et al [14].…”

Section: Introductionmentioning

confidence: 99%

Performance of Reconfigurable Antenna Fabricated on Flexible and Nonflexible Materials for Band Switching Applications

Reddy¹,

Darimireddy

Park

et al. 2021

Energies

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In this article, a novel frequency slot-based switchable antenna fabricated on flexible and nonflexible materials is presented for suitable reconfigurable radiations of Bluetooth, WiMAX, and upper WLAN applications. Initially, the performance of this structure was simulated using a CSTTM simulator and evaluated experimentally using a nonflexible FR4 structure. The same antenna was implemented on a flexible (jean) substrate with a relative permittivity of 1.7. The proposed textile antenna prototypes were fabricated by optimal dimensions of an E-shaped slot with a variation on the shape of the ground layer, integrated using a crossed T-shaped strip with ON/OFF switchable state operations. The proposed antenna prototype is compact (20 × 20 mm2), providing switchable radiations with tri bands, has frequencies ranged at 2.36–2.5 GHz for Bluetooth, 3.51–3.79 GHz and 5.47–5.98 GHz for the distinct bands of WiMAX and WLAN, respectively, as well as part of UWB operations.

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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. Although, such reconfigurable antennas could give a 'smart' profile to the wearable application they lack, in most of the cases, in terms of minimal circuitry challenge.…”

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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A polarization reconfigurable textile patch antenna for wearable IoT applications

Cited by 13 publications

References 3 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

Performance of Reconfigurable Antenna Fabricated on Flexible and Nonflexible Materials for Band Switching Applications

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

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