A new compact multiband antenna for stroke diagnosis system over 0.5–3 GHz

Abtahi, Shirin; Yang, Jian; Kidborg, Stefan

doi:10.1002/mop.27073

Cited by 19 publications

(15 citation statements)

References 12 publications

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“…Hence, in order to provide a more practical way to use and make benefit from coupling medium in MWI systems, the local use of coupling medium only in the direct path between the antennas and the human body was considered. In References 9 and 10, a compact self‐ground bowtie and a V‐shaped slot and short‐circuiting wall triangular patch using a water‐filled cylinder and a water bag as the coupling medium are introduced. Although these antennas provide a relatively small footprint, neither of them provides wideband characteristics.…”

Section: Introductionmentioning

confidence: 99%

Miniaturized on‐body antenna for small and wearable brain microwave imaging systems

Arayeshnia

Amiri

Keshtkar

2020

Int J RF Microw Comput Aided Eng

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A miniaturized inset‐fed on‐body meandered bowtie antenna designed for brain microwave imaging systems is presented in this article. The proposed on‐body antenna can contribute to the realization of a wearable and portable brain microwave imaging system. The size of 18 × 18 mm2 is achieved at a frequency range of 0.75 to 4 GHz by the simultaneous use of self‐complementary structures and meandered lines. The frequency band is a trade‐off between penetration depth and spatial resolution. The proposed antenna performance was studied at different positions on the human head voxel model in terms of several parameters such as reflection coefficient, near‐field directivity, and fidelity factor. In addition, the antenna bandwidth was surveyed on several volunteers using a wearable measurement setup. It has been found that the averages of measured reflection coefficients in different scenarios are in good agreement with the corresponding simulation results, and the antenna shows stable performance under different practical situations. The proposed antenna takes advantage of a small footprint and body matching, which make it an eligible choice for compact, portable, and wearable head microwave imaging systems.

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Section: Introductionmentioning

confidence: 99%

Miniaturized on‐body antenna for small and wearable brain microwave imaging systems

Arayeshnia

Amiri

Keshtkar

2020

Int J RF Microw Comput Aided Eng

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“…The perpendicular component of E-field should be small in order to reduce the power absorption at the fatmuscle transitions and heating of subcutaneous tissues. An attempt to utilise the design for stroke diagnosis system resulted in a multiband antenna operating in frequency band of 0.5-3 GHz [20]. This antenna is, however, not appropriate for hyperthermia, due to the limited number of available frequencies below 1 GHz and inability to handle self-heating effect at high powers.…”

Section: Introductionmentioning

confidence: 99%

Compact self-grounded Bow-Tie antenna design for an UWB phased-array hyperthermia applicator

Takook

Persson

Gellermann

et al. 2017

International Journal of Hyperthermia

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Using UWB hyperthermia systems has the potential to improve the heat delivery to deep seated tumours. In this paper, we present a novel self-grounded Bow-Tie antenna design which is to serve as the basis element in a phased-array applicator. The UWB operation in the frequency range of 0.43-1 GHz is achieved by immersing the antenna in a water bolus. The radiation characteristics are improved by appropriate shaping the water bolus and by inclusion of dielectric layers on the top of the radiating arms of the antenna. In order to find the most appropriate design, we use a combination of performance indicators representing the most important attributes of the antenna. These are the UWB impedance matching, the transmission capability and the effective field size. The antenna was constructed and experimentally validated on muscle-like phantom. The measured reflection and transmission coefficients as well as radiation characteristics are in excellent agreement with the simulated results. MR image acquisitions with antenna located inside MR bore indicate a negligible distortion of the images by the antenna itself, which indicates MR compatibility.

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“…Due to the flexibility and good performance, the selfgrounded antennas have been applied or under investigation to the following areas: i) UWB indoor and through-wall radar with precise ranging and tracking due to the wideband performance, fast time-domain impulse response and the compact size [14]; ii) wideband MIMO systems due to the large coverage, good polarization balance and high diversity gain [8], [15]; iii) stroke diagnosis system due to the good near field aperture distribution [16]; iv) UWB SAR imaging of near field object for industrial process [17], [18]; v) breathing and heartbeat detection [19]. vi) receiving antenna on moving vehicles, such as on boats, trains and cars, because of its good Axial Ratio over large elevation angles and low profile.…”

Section: Applicationsmentioning

confidence: 99%

Arrangements and applications of self-grounded antennas

Yang

Al-Rawi

Raza

et al. 2014

The 8th European Conference on Antennas and Propagation (EuCAP 2014)

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Abstract-The self-grounded antenna is a new type of compact ultra-wideband antennas with simple geometries. One of the characteristics of this type antenna is its high flexibility: the configuration of the antenna can be arranged in many different ways for different applications. In this paper, we overview the typical arrangements of the self-grounded antennas, and their performance for different applications.

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A new compact multiband antenna for stroke diagnosis system over 0.5–3 GHz

Cited by 19 publications

References 12 publications

Miniaturized on‐body antenna for small and wearable brain microwave imaging systems

Miniaturized on‐body antenna for small and wearable brain microwave imaging systems

Compact self-grounded Bow-Tie antenna design for an UWB phased-array hyperthermia applicator

Arrangements and applications of self-grounded antennas

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