An All-Textile SIW Cavity-Backed Circular Ring-Slot Antenna for WBAN Applications

Hong, Yong-Geun; Tak, Jinpil; Choi, Jaehoon

doi:10.1109/lawp.2016.2549578

Cited by 101 publications

(69 citation statements)

References 16 publications

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“…The overall front‐to‐back‐ratio for each operating frequency is observed better than 14 dB. To highlight the contribution of the proposed work, the performance of the proposed geomery is equated with other reported works in Table . The proposed structure demonstrates the high value of gain and comparable fractional bandwidth with the other prototypes in a compact size.…”

Section: Measurement Resultsmentioning

confidence: 99%

“…By removing the substrate underneath the slot, the quality factor is decreased and corresponding bandwidth is enhanced in Reference . In Reference , a via is placed above the slot to excite the hybrid mode, a modified triangular ring slot is used in Reference , two cavity modes are merged by properly optimizing the dimensions of the cavity and circular ring slot, radiating and nonradiating (even‐odd) modes are coupled by using multiple shorted vias …”

Section: Introductionmentioning

confidence: 99%

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SIW cavity‐backed 24 ° inclined‐slots antenna for ISM band application

Chaturvedi

2020

Int J RF Microw Comput Aided Eng

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In this article, a novel resonant series slot linearly polarized antenna is realized using substrate integrated waveguide (SIW) technology for industrial scientific medical radio band (ISM) at 5.8 GHz. The proposed antenna consists of two 24° inclined slots and two metallic vias to produce alternate inductive and capacitive loads. The rectangular slots are introduced at the top metallic surface at an angle of 24° from the Y‐axis to excite a hybrid mode (TE110 + TE120) near to the modified cavity mode TE120. The resonant slots are excited with the help of an inset microstrip feedline which retain its planar integrability. The slots are excited to resonate in the TE120 mode at 5.8 GHz. To enhance the bandwidth, the location of two shorting vias are optimized in proximity to the slots. These vias help to couple the hybrid mode and the cavity modes in the desired frequency band, which leads to enhancement in the bandwidth significantly. The proposed geometry is fabricated and experimentally verified. The measured and simulated results depict a good co‐relation which show measured −10 dB fractional bandwidth of 5.2% with a maximum gain of 7.15 dBi and the front to back ratio better than 15 dB at 5.8 GHz.

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Section: Measurement Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

SIW cavity‐backed 24 ° inclined‐slots antenna for ISM band application

Chaturvedi

2020

Int J RF Microw Comput Aided Eng

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“…From the perspective of wearability, the antenna must exhibit a small footprint and should be mechanically flexible (Osman et al, ; Sanz‐Izquierdo et al, ). In addition, effects such as bending and the presence of the human body should not adversely affect antenna performance (Hong et al, ; Liu et al, ). Furthermore, the aforementioned limited availability of power in body‐worn systems requires a high radiation efficiency (Van Baelen et al, ).…”

Section: Introductionmentioning

confidence: 99%

Foldable All‐Textile Cavity‐Backed Slot Antennas for Personal UWB Localization

et al. 2020

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An all‐textile multimoded cavity‐backed slot antenna has been designed and fabricated for body‐worn impulse radio ultra‐wideband (IR‐UWB) operation in the 3,744–4,742.4 MHz frequency band, thereby covering Channels 2 and 3 of the IEEE 802.15.4a standard. Its light weight, mechanical flexibility, and small footprint of 35 mm × 56 mm facilitate integration into textile for radio communication equipment for first aid responders, personal locator beacons, and equipment for localization and medical monitoring of children or the elderly. The antenna features a stable radiation pattern and reflection coefficient in diverse operating conditions such as in free space, when subject to diverse bending radii and when deployed on the torso or upper right arm of a test person. The high isolation toward the wearer's body originates from the antenna's hemispherical radiation pattern with a −3 dB beamwidth of 120∘ and a front‐to‐back ratio higher than 11 dB over the entire band. Moreover, the antenna exhibits a measured maximum gain higher than 6.3 dBi and a radiation efficiency over 75%. In addition, orientation‐specific pulse distortion introduced by the antenna element is analyzed by means of the System Fidelity Factor (SFF). The SFF of the communication link between two instances of this antenna is higher than 94% for all directions within the antenna's −3 dB beamwidth. This easily wearable and deployable antenna is suitable to support IR‐UWB localization with an accuracy in the order of 5 cm.

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“…In recent years, substrate-integrated-waveguide (SIW) cavities have been widely studied for antenna designs, due to attractive advantages such as low profile, low-cost fabrication, and seamlessly planar integration [4][5][6]. However, these antennas have a drawback of large cavity size.…”

Section: Introductionmentioning

confidence: 99%

Compact Four-Element Mimo Antenna System Based on Substrate-Integrated-Waveguide Cavities

Niu¹,

Tan²

2020

PIER Letters

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A compact four-element multiple-input-and-multiple-output (MIMO) antenna system is proposed based on substrate-integrated-waveguide (SIW) cavities. By bisecting a square SIW cavity, two rectangle half-mode cavities with opened edges are formed. They are arranged side by side sharing a row of metallic vias. Then two narrow T-shaped slots are etched along symmetry planes to divide these two cavities into four quarter-mode sub-cavities. Excited by feeding ports, four antenna elements with compact size are constructed, which radiate incident wave through opened cavity edges and etched slots. Moreover, antenna isolation can be easily improved by adjusting slot length though these elements interconnect. A prototype with the cavity size of 0.22λ 0 × 0.86λ 0 × 0.04λ 0 has been fabricated. The fabricated MIMO antenna system exhibits the center frequency of 3.51 GHz, port isolation of 14 dB, envelope correlation coefficient of 0.03, peak gain of 4.9 dBi, and high efficiency of 77.4%. The compact size and effective isolation improvement make the proposed design attractive for practical applications.

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An All-Textile SIW Cavity-Backed Circular Ring-Slot Antenna for WBAN Applications

Cited by 101 publications

References 16 publications

SIW cavity‐backed 24 ° inclined‐slots antenna for ISM band application

SIW cavity‐backed 24 ° inclined‐slots antenna for ISM band application

Foldable All‐Textile Cavity‐Backed Slot Antennas for Personal UWB Localization

Compact Four-Element Mimo Antenna System Based on Substrate-Integrated-Waveguide Cavities

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