Wetness experiment for compact CPW-fed ultra wideband antenna using textile material

Jalil, M. E.; Rahim, Mohamad Kamal A.; Samsuri, N. A.; Abdullah, Mohd Azman; Kamardin, Kamilia

doi:10.1109/apace.2012.6457680

Cited by 16 publications

(13 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…It is well known that the presence of water with high dielectric constant strongly influences the relative permittivity of substrate. From the previous research, the textile antenna does not work when placed in the water [24,25]. Therefore, it is important to choose a suitable substrate with low absorption to ensure that the antenna can perform well under wet conditions.…”

Section: Wet Condition Experimentsmentioning

confidence: 99%

Fractal Koch Multiband Textile Antenna Performance With Bending, Wet Conditions and on the Human Body

Jalil¹,

Rahim²,

Samsuri³

et al. 2013

PIER

Self Cite

View full text Add to dashboard Cite

Abstract-A multiband Fractal Koch dipole textile antenna is proposed for wearable applications. The antenna is designed to operate at 0.9 GHz, 2.45 GHz and 5.8 GHz. Denim materials as the substrate are selected aiming to obtain robustness, flexibility and a lightweight textile antenna. The antenna model is designed, simulated, optimized and analyzed using Microwave Studio CST software. Two types of multiband antenna prototypes are fabricated and evaluated with different conducting elements (Shield It fabric and copper foil tape). Antenna performance is observed in terms of return loss, bandwidth, radiation pattern and realized gain. Three different comprehensive analyses are taken into consideration: measurement antenna with different bending sizes, on-body measurement and under wet conditions. The antenna performances are evaluated based on resonant frequency (f o ) and bandwidth (BW). The antennas performance with bending on the human body (arm & forearm) is compared and investigated. A suitable placement on the body has been discovered between the chest and backside. The antennas have also been tested under wet conditions to ensure a stable characteristic under the influence of water.

show abstract

Section: Wet Condition Experimentsmentioning

confidence: 99%

Fractal Koch Multiband Textile Antenna Performance With Bending, Wet Conditions and on the Human Body

Jalil¹,

Rahim²,

Samsuri³

et al. 2013

PIER

Self Cite

View full text Add to dashboard Cite

show abstract

“…A CPW-fed UWB antenna is designed to operate between 2 and 13 GHz with the dimension of radius, rad a = 20 mm, rad b = 25 mm, h = 66 mm and l = 40 mm [18]. Then, the Koch-fractal multiband antenna is designed with dipole structures operating at 0.9, 2.5 and 5.8 GHz [19] with respective dimension, l 1 = 54.9 mm l 2 = 24.45 mm, l 3 = 7.05 mm and w = 3 mm. The permittivity of denim fabric is found to be 1.67 with tangent loss of 0.025.…”

Section: Types Of Planar Textile Antennamentioning

confidence: 99%

Planar Textile Antenna for Body Centric Wireless Communication System

Jalil¹,

Rahim²,

Ramly³

et al. 2014

PIER C

Self Cite

View full text Add to dashboard Cite

Abstract-One of the most important aspects for body centric communication is the development of the textile antenna for on-body communication. Antennas for on-body environment usually suffer performance degradation caused by the human body. Apart from that, textile antenna gets easily bent, flexed, wrinkled or wet. This paper presents an investigation on three different designs and types of planar antennas, which are single band textile dipole antenna, fractal Koch multiband dipole antenna and monopole ultra wide band antennas. The performance of the antennas has been evaluated in terms of bending, wetness condition and on-body simulation. The results show that the bending effect is not critical in free space for the planar antennas, but the performance is notably degraded under wet condition while the antenna reflection coefficient is shifted when placed on the human body.

show abstract

“…Although wearable antennas suffer performance distortion when applied to human body, this field is still widely explored by researchers. One of the most researched wearable antenna types is the wearable fabric based antenna [13][14][15][16][17][18], initially designed in the form of a helmet [19] as well as a vest [20,21], and since then, it is always meant to be a part of clothing. In general, fabrics have low dielectric constant, hence this property helps in getting a wide bandwidth from the antenna.…”

Section: Introductionmentioning

confidence: 99%

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

Kamardin¹,

Rahim²,

Samsuri³

et al. 2013

PIER B

Self Cite

View full text Add to dashboard Cite

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.

show abstract

Wetness experiment for compact CPW-fed ultra wideband antenna using textile material

Cited by 16 publications

References 4 publications

Fractal Koch Multiband Textile Antenna Performance With Bending, Wet Conditions and on the Human Body

Fractal Koch Multiband Textile Antenna Performance With Bending, Wet Conditions and on the Human Body

Planar Textile Antenna for Body Centric Wireless Communication System

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

Contact Info

Product

Resources

About