A Dual-Band On-Body Repeater Antenna for Body Sensor Network

Xu, Lijie; Duan, Zhu; Tang, Yiming; Zhang, Ming

doi:10.1109/lawp.2016.2520023

Cited by 30 publications

(17 citation statements)

References 12 publications

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“…Repeater antennas integrate off‐body mode are shown in Refs. 4 and 5. However, the gain at off‐body mode is quite low in Refs.…”

Section: Introductionmentioning

confidence: 96%

“…However, the gain at off‐body mode is quite low in Refs. 4 and 5, which are −18.5 and −4.46 dB, respectively. Moreover, repeater antennas equip on‐body mode are presented in Refs.…”

Section: Introductionmentioning

confidence: 97%

“…In order to solve this problem, frequency or polarization or pattern reconfigurable antennas are proposed for WBAN applications. 2,[4][5][6][7][8][9][10][11][12][13][14][15] Antennas with repeater property reconfigure on-body mode or off-body mode are researched in recent years, 2,4-8 and on-/off-body modes wearable reconfigurable antennas are commonly found in articles. [9][10][11][12][13][14][15] Innovatively, we present a wearable antenna combined all these three modes for more practical application, which will make information exchange more flexible between devices near or implant in the body.…”

Section: Introductionmentioning

confidence: 99%

“…Most implantable antennas are operating at medical implant communication service (MICS) band (402-405 MHz) due to the lower propagation losses in this band. 2,[4][5][6] However, industrial, scientific and medical (ISM) band is popular for WBAN applications. 2,[4][5][6][7][8][9][10][11][12][13][14] .…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

A triple‐mode reconfigurable wearable repeater antenna for WBAN applications

Tong

Liu

Guo

et al. 2018

Int J RF Microw Comput Aided Eng

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A reconfigurable wearable repeater antenna (RWRA) for wireless body area network (WBAN) applications is proposed. The RWRA can work at triple‐mode by controlling the state of PIN diodes, which are repeater, on‐body and off‐body modes. The antenna is fed by a single port at side instead of bottom for the sake of reducing the profile and improving the coupling strength between the RWRA and an implantable antenna. The total size of the antenna is π × 282 × 4.8 mm3. To validate the performance, the RWRA is fabricated and measured on minced pork. Measured bandwidths at repeater and on‐/off‐body modes are 5.8, 84, and 54 MHz, respectively. Radiation patterns are omnidirectional with vertical polarization at on‐body mode and broadside at off‐body mode, which measured peak gains are 1.2 and 5.4 dBi, respectively. Specific absorption rate (SAR) values at all three modes are analyzed in this article as well. Coupling strength between the RWRA and an implantable antenna is also measured. Besides, the effect of distance and misalignment between them are analyzed.

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“…Repeater antennas integrate off‐body mode are shown in Refs. 4 and 5. However, the gain at off‐body mode is quite low in Refs.…”

Section: Introductionmentioning

confidence: 96%

“…However, the gain at off‐body mode is quite low in Refs. 4 and 5, which are −18.5 and −4.46 dB, respectively. Moreover, repeater antennas equip on‐body mode are presented in Refs.…”

Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A triple‐mode reconfigurable wearable repeater antenna for WBAN applications

Tong

Liu

Guo

et al. 2018

Int J RF Microw Comput Aided Eng

View full text Add to dashboard Cite

show abstract

“…Owing to significant demand for these frequency bands, several efforts have been made to design dualband antennas with compact size, flexibility and good operating characteristics [4]. To place the antenna on human body there are some limitations to be considered such as size, safety and low propagation losses inside the conductive layers [5]. The antenna is placed on high dielectric constant layers like skin which leads to frequency disturbance and back radiation influence by the human layers and causes biological effects.…”

Section: Introductionmentioning

confidence: 99%

Asymmetric Ground Structured Circularly Polarized Antenna for Ism and Wlan Band Applications

Nadh¹,

Madhav²,

Kumar³

et al. 2018

PIER M

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This article presents the design and analysis of a dual-band antenna with circular polarization for ISM and WLAN band applications. The proposed antenna operates at two frequencies ranging from 2.1-3.1 GHz and 4.4-7.7 GHz with resonating frequencies at 2.45 GHz industrial, scientific and medical band (ISM) and 5.8 GHz wireless local area network band (WLAN). The antenna is fed by coplanar waveguide feeding (CPW) with an asymmetric ground structure, and the radiating element consists of 24 spokes in the design. The current antenna providing the impedance bandwidths of 38.4% and 49% at two operating bands. The proposed antenna exhibiting circular polarisation with 3 dB axial ratio bandwidth of 150 MHz at 2.33-2.48 GHz and 1600 MHz at 5.14-6.74 GHz. The designed antenna is fabricated on an RT Duroid 5880 substrate with dimensions of 40 × 28 × 0.4 mm 3 . The intension behind the design of this antenna is to use it for wearable applications in conformal nature with low specific absorption rate (SAR). The SAR values observed at two operating frequencies are 1.09 W/Kg and 1.47 W/Kg on hand and 0.946 W/Kg and 1.12 W/Kg on head, respectively. The placement and radiation characteristics analysis is done with Ansys Savant tool, and the subsequent measured results provide good correlation with simulation results.

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Quarter‐Wave Plates to Improve Rotational Misalignment Robustness in Medical Telemetry

Blauert

Kiourti

2021

Bioelectromagnetics

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A major challenge in developing robust wireless links to implanted/ingestible antennas is the potential for rotational misalignment. In this paper, we present an artificially anisotropic quarter‐wave plate (QWP) capable of developing a circularly polarized wave from a linearly polarized wave. Without loss of generality, our QWP is composed of plastic and hydrogel, while the linearly polarized wave is developed by a bio‐matched antenna—a high gain, broadband antenna with a dielectric engineered to match to biological tissues. Using a basic implanted patch antenna, we demonstrate a 1.00 dB (1.26) variance in transmission coefficient over a 90° variance, with a remarkable average measured transmission coefficient of −34.4 dB (3.63 × 10−4) at 2.4 GHz. Without the QWP, the rotational variance is 12.52 dB (17.9). Notably, the QWP increases the maximum input power to comply with specific absorption rate limitations. In our case, this allows for −15.0 dBm (31.6 µW) of power to be received by the implant, which is comparable to the −15.7 dBm (26.9 µW) received without the QWP. Additionally, we demonstrate that with the QWP, the standard deviation from the mean transmission for rotational misalignments remains below 3 dB (2.00) from 2 to 3.62 GHz, resulting in a simulated 57.7% fractional bandwidth. © 2021 Bioelectromagnetics Society.

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A Dual-Band On-Body Repeater Antenna for Body Sensor Network

Cited by 30 publications

References 12 publications

A triple‐mode reconfigurable wearable repeater antenna for WBAN applications

A triple‐mode reconfigurable wearable repeater antenna for WBAN applications

Asymmetric Ground Structured Circularly Polarized Antenna for Ism and Wlan Band Applications

Quarter‐Wave Plates to Improve Rotational Misalignment Robustness in Medical Telemetry

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