Characterization of ultra-wideband antenna with human body

Promwong, Sathaporn; Hachitani, Wataru; Ching, Gilbert Siy; Takada, Jun‐ichi

doi:10.1109/iscit.2004.1413911

Cited by 9 publications

(5 citation statements)

References 3 publications

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“…Most of them are focused on simple analytical antenna models, because of the lack of numerical capabilities at that time, and the scenario at boresight is only considered. Recently, some research activities on the Friis formula have been reported, but their effectiveness is limited to the far-field region [23][24][25].…”

Section: Introductionmentioning

confidence: 99%

Generalised correction to the Friis formula: quick determination of the coupling in the Fresnel region

Kim

Rahmat‐Samii

2013

IET Microwaves, Antennas & Propagation

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A simple yet effective correction term to the Friis formula is presented to improve its accuracy in the Fresnel region. Based on the concept of gain reduction factor, the proposed asymptotic term with an empirical coefficient can be widely applied to a variety of antennas without lengthy calculations. The information required in the computation is only the antenna gain, separation and wavelength for the boresight scenarios. Case studies of several representative antennas using full-wave simulations show that the accuracy of the estimated power transmission levels between two antennas in the Fresnel region can be improved by up to 2-5 dB, for both boresight and off-axis cases. Measurement results using two horn antennas also confirm the validity of the proposed correction term.

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Section: Introductionmentioning

confidence: 99%

Generalised correction to the Friis formula: quick determination of the coupling in the Fresnel region

Kim

Rahmat‐Samii

2013

IET Microwaves, Antennas & Propagation

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“…The UWB antenna and channel characterization considering human body effects were conducted for wireless personal area network (WPAN) applications [9]- [11]. The effect of the body on UWB signal propagation was measured for one antenna placed on the body and the other antenna kept away from the body.…”

Section: Introductionmentioning

confidence: 99%

Performance of UWB Impulse Radio With Planar Monopoles Over On-Human-Body Propagation Channel for Wireless Body Area Networks

Zhang

2007

IEEE Trans. Antennas Propagat.

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“…Those methods are different with respect to (a) possible antenna geometries, (b) required information, and (c) computational resources. The Friis formula can be expressed with a correction term of [11][12][13][14][15][16][17][18]. The formula can accommodate the instant computation with the basic information, such as gain at bore-sight and operational frequency while its effectiveness is confined within the Fresnel region.…”

Section: Friis Formula With a Correction Termmentioning

confidence: 99%

“…Most of scenarios were focused on simple boresight power transmission. Recent research activities related to the Friis formula were very handful, and its effectiveness was only valid in the far-field region [17,18].…”

Section: Friis Formula With Correction Term 41 Introductionmentioning

confidence: 99%

Electromagnetic Computation of the Short-range Wireless Linkbuget for Biomedical Communication

Kim¹

2018

Emerging Microwave Technologies in Industrial, Agricultural, Medical and Food Processing

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The biomedical monitoring and imaging system requires data and power transmission through short-range communication, and the interference between large antennas placed within near-field region becomes the important consideration in designing an entire system. For the short-range communication, the electromagnetic computation becomes more complex, which requires huge computational resources. The efficient numerical methods that can be used in short-range communication are (1) Friis formula with correction term and (2) integral coupling formula. Both formulas are similar in an aspect that far-field gain pattern is used to calculate the link budget in a short range. The range of the communication link between two antennas can be defined as reactive nearfield, radiating near-field including Fresnel region, a far-field region in the order of nearest distance. Friis formula with correction term can be useful for the simple on-axis antenna displacement in Fresnel region. The integral coupling formula is flexible to compute the mutual coupling of diverse antenna geometries within an entire radiating near-field and a far-field region. Those two methods are evaluated using several examples of short-range communication and interference, and indoor measurement evaluates the validity of the calculated results.

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Characterization of ultra-wideband antenna with human body

Cited by 9 publications

References 3 publications

Generalised correction to the Friis formula: quick determination of the coupling in the Fresnel region

Generalised correction to the Friis formula: quick determination of the coupling in the Fresnel region

Performance of UWB Impulse Radio With Planar Monopoles Over On-Human-Body Propagation Channel for Wireless Body Area Networks

Electromagnetic Computation of the Short-range Wireless Linkbuget for Biomedical Communication

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