Detuning Study of Implantable Antennas Inside the Human Body

Vidal, N.; Curto, Sergio; López-Villegas, J.M.; Sieiro, J.; Ramos, F.

doi:10.2528/pier11120515

Cited by 52 publications

(34 citation statements)

References 32 publications

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“…Wearable antennas are usually used in body centric communications [9][10][11][12], until recently. Although wearable antennas suffer performance distortion when applied to human body, this field is still widely explored by researchers.…”

Section: Introductionmentioning

confidence: 99%

Textile Artificial Magnetic Conductor Waveguide Jacket for on-Body Transmission Enhancement

Kamardin¹,

Rahim²,

Samsuri³

et al. 2013

PIER B

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Abstract-Diamond dipole antennas with textile Artificial Magnetic Conductor (AMC) sheet-like waveguide were designed to investigate the possibility of improving transmission between antennas. Fleece fabric is used as the substrate of the textile AMC while SHIELDIT fabric is used as the conductive patches and ground plane. The AMC surface is designed to resonate at 2.45 GHz with the goal to enhance the transmission between antennas. A small textile AMC waveguide sheet as well as an AMC waveguide jacket were fabricated. The S-parameters performance of the two antennas with textile AMC sheet was investigated in a free space environment and near to human body setting. The effect of different antennas' orientations was also considered. Measurements were conducted thoroughly to validate the simulated findings. Compared to free space environment, S 21 transmission between two dipoles is improved up to maximum −10 dB when having textile AMC waveguide sheet beneath them. For both off-body and on-body placements, significant transmission enhancement has been observed with the introduction of the AMC sheet-like waveguide. Directive radiation patterns with high gain have also been achieved with the proposed AMC waveguide jacket.

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Section: Introductionmentioning

confidence: 99%

Textile Artificial Magnetic Conductor Waveguide Jacket for on-Body Transmission Enhancement

Kamardin¹,

Rahim²,

Samsuri³

et al. 2013

PIER B

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“…The detuning of the antenna has also to be considered if the antenna is in touch or in close proximity to a dielectric medium. Vidal et al [30] observed, for example, a detuning by the maximum offset of 70 MHz for an antenna that was first optimized for 403 MHz and then implanted into the human body.…”

Section: (A) Additional Influences On Transmission Rangementioning

confidence: 99%

Communication techniques and challenges for wireless food quality monitoring

Jedermann

Pötsch

Lloyd

2014

Phil. Trans. R. Soc. A.

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Remote measurement of product core temperature is an important prerequisite to improve the cool chain of food products and reduce losses. This paper examines and shows possible solutions to technical challenges that still hinder practical applications of wireless sensor networks in the field of food transport supervision. The high signal attenuation by water-containing products limits the communication range to less than 0.5 m for the commonly used 2.4 GHz radio chips. By theoretical analysis of the dependency of signal attenuation on the operating frequency, we show that the signal attenuation can be largely reduced by the use of 433 MHz or 866 MHz devices, but forwarding of messages over multiple hops inside a sensor network is mostly unavoidable to guarantee full coverage of a packed container. Communication protocols have to provide compatibility with widely accepted standards for integration into the global Internet, which has been achieved by programming an implementation of the constrained application protocol for wireless sensor nodes and integrating into IPv6-based networks. The sensor's battery lifetime can be extended by optimizing communication protocols and by in-network pre-processing of the sensor data. The feasibility of remote freight supervision was demonstrated by our full-scale ‘Intelligent Container’ prototype.

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“…In order to operate as such systems, the antenna must be in small size and provide better performances than antenna operating in free space environments [6][7][8][9][10][11]. Based on the previously reported research works, printed monopole antenna has become a major field of interest due to its compact size, omni-directional radiation patterns, large bandwidth (BW) and high radiation efficiency [12][13][14][15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

A 6.0 GHZ Small Printed Monopole Antenna for Wireless Implantable Body Area Network (Wiban) Applications

Ramli

Kamarudin²,

Samsuri³

et al. 2013

PIER C

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Abstract-Wireless implantable body area network (WiBAN) is useful for monitoring vital human parameters in medical diagnosis such as breast cancer, heart attack and high blood pressure. The main objective of this paper is to design a small printed monopole antenna for WiBAN applications at 6.0 GHz. The small implantable antenna was tested in a lossy environment by being submerged into canola oil that mimics the dielectric properties of human breast fat tissue. The antenna performances were measured by using vector network analyzer (VNA) in order to evaluate the return loss and operating bandwidth of the antenna. The other parameters such as efficiency, radiation pattern and gain are evaluated by simulation of CST Studio 2012 software. When compared, there is good agreement between the simulation and measurement results. The simulated antenna gain and efficiency are 5.8 dBi and 97%, respectively, when submerged into canola oil. The antenna radiation pattern is directional, and it has 6 lobes implying its coverage in more directions which is of good benefit due to body movement. The antenna's polarization was tested by placing a wideband antenna at several degrees around the proposed

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Detuning Study of Implantable Antennas Inside the Human Body

Cited by 52 publications

References 32 publications

Textile Artificial Magnetic Conductor Waveguide Jacket for on-Body Transmission Enhancement

Textile Artificial Magnetic Conductor Waveguide Jacket for on-Body Transmission Enhancement

Communication techniques and challenges for wireless food quality monitoring

A 6.0 GHZ Small Printed Monopole Antenna for Wireless Implantable Body Area Network (Wiban) Applications

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