A Broadband High Gain Planar Vivaldi Antenna for Medical Internet of Things (M-IoT) Healthcare Applications (original) (raw)

A novel compact broadband and radiation efficient antenna design for medical IoT healthcare system

AIMS Press, 2022

This paper investigates and develops a novel compact broadband and radiation efficient antenna design for the medical internet of things (M-IoT) healthcare system. The proposed antenna comprises of an umbrella-shaped metallic ground plane (UsMGP) and an improved radiator. A hybrid approach is employed to obtain the optimal results of antenna. The proposed solution is primarily based on the utilization of etching slots and a loaded stub on the ground plane and rectangular patch. The antenna consists of a simple rectangular patch, a 50 Ω microstrip feed line, and a portion of the ground plane printed on a relatively inexpensive flame retardant material (FR4) thick substrate with an overall compact dimension of 22 × 28 × 1.5 mm 3. The proposed antenna offers compact, broadband and radiation efficient features. The antenna is carefully designed by employing the approximate calculation formulae extracted from the transmission line model. Besides, the parameters study of important variables involved in the antenna design and its influence on impedance matching performance are analyzed. The antenna shows high performance, including

Design and Parametric Study of Microstrip-fed Vivaldi Antenna for Body Area Network

IRJET, 2022

Vivaldi antenna with high-frequency selectivity is organized and examined. This paper consolidates the effects of antenna plan parameters on its execution. 3D electromagnetic generation programming CST was used to reenact distinctive sizes of three important structure parameters. By looking at a couple of antenna basic parametric results, including return loss (S-parameter), voltage standing wave ratio (VSWR), reference impedance and substrate parameters expect a basic occupation in antenna execution. Results exhibit that incredible frequency selectivity of the multiband from 4.546GHz to 5.784GHz is recognized, and the antenna shows extraordinary impedance arrange, high radiation gain, and wonderful radiation directivity in the multiband. Both the proliferation and estimation results give incredible understanding.

A Compact CPW-fed Multiband Bow-tie Slot Antenna for IoT Smart Healthcare Wireless Communication Applications

IEEE, 2022

This paper designs, simulates and investigates a compact multiband bow-tie slot antenna (BTSA) for an internet of things smart healthcare (IoT-SH) wireless communication applications. The intended antenna prototype is simple in design and aimed to achieve the multiband response at specific microwave frequencies. The five distinct frequency bands were achieved by selecting an appropriate laminate material and dimensions / positions of the rectangular / triangular slots etched out from the metal conducting sheet. The designed antenna has the compact dimensions of 3.0 × 6.0 cm 2 and fed with an standard 50 Ω coplanar waveguide (CPW) feedline. A flame retardant (FR4) epoxy substrate material is used in the antenna design model with constant values of dielectric loss tangent δ = 0.02 and relative permittivity ε r = 4.4. Moreover, multiple frequency tuning and impedance matching performance were analyzed by varying the dimensions / position of CPW feedline. The key performance features of the proposed antenna such as impedance bandwidth, return loss, VSWR, surface current distribution and radiation patterns across the standard planes are analyzed and discussed. The group delay performance parameter is also provided in order to validate the proposed antenna results in time domain which has proven the overall baseline < 2.5 nano seconds at the specific resonances. Finally, the simulation results have been carefully analyzed, presented and their comparison with the recent reported literature is provided. The proposed antenna exhibited the promising results and suitable for IoT-SH wireless communication applications.

Comparative Analysis of Microstrip Patch Antenna of Wearable IOT Devices for Health Care

2021

The Advances in the biomedical applications demands an antenna having highefficiency and gain, low return losses and Specific Absorption Ratio (SAR) to beassociated with the wearable and implantable devices for the accurate data transferwithout any data drift. For this, multi-band MIMO (multi-input multi output)applications, the antenna design with the target parameters is a challenging task toestablish a rich and reliable wireless communication setup with the monitoring systemin SHM of both biomedical and industrial sectors. Higher SAR will create the hazardsto the human body. The gain of the antenna and return loss figures depends on thesignal loss in the human tissues. Another important design challenge is the antennasize, which should be convenient to carry. Usually, Micro strip patch antenna is usingfor such type of applications as it satisfies most of the design parameters. But thebandwidth and gain of MSP are very limited. Hence there is huge scope to enhancethe gain and band...

A Miniaturized Broadband and High Gain Planar Vivaldi Antenna for Future Wireless Communication Applications

International Journal of Antennas and Propagation

This paper presents a new miniaturized planar Vivaldi antenna (PVA) design. The proposed antenna structure consists of an aperture tapered profile and cavity stub fed with a simple 50 Ω strip line feeding network. The designed PVA offers versatile advantages, including the miniaturized size and simple design, and exhibited an outstanding performance compared to the latest reported literature. The antenna occupies a minimal space with an electrical size of 0.92λ0 × 0.64λ0 × 0.03λ0. The antenna achieves an excellent relative impedance bandwidth 117.25% at 10 dB return loss, peak realized gain of 10.9 dBi, and an excellent radiation efficiency of 95% at the specific resonances. The antenna’s optimal features, that is, broadband, high gain, and radiation efficiency, are achieved with efficient grooves based approach. Besides, the proposed antenna results are also analyzed in the time domain, which shows the excellent group delay performance <2 ns in the operational band. The proposed...

A compact triband antipodal Vivaldi antenna with frequency selective surface inspired director for IoT/WLAN applications

Wireless Networks, 2021

In this paper, an antipodal triband Vivaldi antenna operating in 2.4/5.2/5.8 GHz bands has been presented for WLAN/IoT applications. The proposed antipodal Vivaldi antenna has meander line shaped slotted lines, which are structured on the edges of exponentially tapered antipodal metallic branches and frequency selective surface (FSS) inspired director in the front part of the exponentially tapered patches on both top and bottom sides of the substrate. The meander line shaped slots on the tapered antipodal metallic branches have been utilized to improve the impedance bandwidth whereas FSS inspired director has RF performance effect on the enhancement of the gain and suppression of the side lobe levels in WLAN/IoT frequency bands. This FSS inspired director has the structural geometries in the form of meta-material based FSS consisting of an array of the sub-wavelength rectangular patches. These FSS structures are designed by global and local optimization processes using fast and efficient meta-heuristic algorithms, honey bee mating optimization (HBMO) and Differential Evolutionary. The optimized antenna model has been prototyped with the use of 3D printed substrate material based on PLA Filament-Polar White RBX-PLA-WH002 having predetermined filling form factor to obtain the desired substrate permittivity in the operating frequency bands. The simulated results of the proposed antenna design are in good agreement with the measured results. Furthermore the experimental results verify that the propotyped antipodal Vivaldi antenna has better RF performance as compared with the counterpart alternative designs in the literature. It can be concluded that the proposed antipodal Vivaldi antenna is a promising candidate for WLAN/IoT applications with high RF performance and easy integration into the microwave circuits.

Array Antenna for Wireless Access Points and Futuristic Healthcare Devices

Electronics

A design of a low-profile and printed array antenna for wireless access points and futuristic healthcare devices is presented in this manuscript. The antenna design is derived from a printed dipole configuration and is optimized using an empirical design approach to achieve enhanced bandwidth, gain and efficiency performances. The antenna is printed on Rogers RT-5880 laminate with a permittivity of 2.2 and a thickness of 0.508 mm. The overall footprint of the design covers 27.5 × 39.1 mm2 on a substrate of 36 × 42 mm2. Results have shown that the design covers a wide bandwidth of more than 7 GHz, making it capable of covering 40.5–42.5 GHz, 42.5–43.5 GHz, 45.5–47 GHz and 47–47.2 GHz 5G bands as recommended in WRC-15. The design shows an average gain of 11.5 dB and an average efficiency of 84% over the entire bandwidth. The simulation and measurement results mostly agree, with minor disparities which might have been caused due to substrate tolerance and testing setup.

A Novel Antenna Design for Telemedicine Applications

2013

To develop a reliable and cost effective communication platform for the telemedicine applications, novel antenna design has been presented using bacterial foraging optimization (BFO) technique. The proposed antenna geometry is achieved by etching a modified Koch curve fractal shape at the edges and a square shape slot at the center of the radiating element of a patch antenna. It has been found that the new antenna has achieved 43.79% size reduction and better resonating characteristic than the original patch. Representative results for both simulations and numerical validations are reported in order to assess the effectiveness of the developed methodology. Keywords—BFO, electrical permittivity, fractals, Koch curve.

Miniaturized Ultrawideband Microstrip Antenna for IoT-Based Wireless Body Area Network Applications

Wireless Communications and Mobile Computing

In this paper, we present an extremely compact ultrawideband (UWB) monopole microstrip patch antenna for a wireless body area network (WBAN). The proposed antenna is fabricated on a flexible Rogers RT-5880 dielectric substrate of thickness 0.5 mm and has an overall size of 20 × 15 × 0.5 m m 3 . The proposed antenna achieves a wideband characteristic with the help of a modified ground plane with a monopole pair. The monopole antenna is fed through a microstrip line and has a good impedance matching over a frequency band of 3.2 to 15 GHz (and beyond), with an axial ratio below 3 dB and a high efficiency of 77–95%. This antenna is designed to cover almost the complete UWB range; bandwidth for antenna is 11.52 GHz (3.48-15 GHz). The antenna has a realized gain of 2.3–7.2 dBi throughout the frequency band and has been tested for conformality. Measured results are found to be in good correlation with the simulated results. The antenna has also been tested for specific absorption rate (S...

A Novel Wideband and Multi-band Implantable Antenna Design for Biomedical Telemetry

The Applied Computational Electromagnetics Society Journal (ACES)

In this work, a novel multi-tracks wideband and multi-band miniaturized antenna design for implanted medical devices biomedical telemetry is proposed. This antenna entirely covers seven frequency bands which are the bands (401−406) MHz of the Medical Device Radiocommunications Service (MedRadio), the three bands (433.1−434.8), (868.0−868.6), and (902.8−928.0) MHz of the Industrial, Scientific, and Medical (ISM), and the three bands (608−614) MHz, and (1.395−1.400) and (1.427−1.432) GHz of the Wireless Medical Telemetry Service (WMTS). The antenna possesses a compact full size of (19.5 × 12.9 × 0.456) mm3. The antenna miniaturization and impedance bandwidth enhancement are achieved using two techniques: the patch slotting and insertion of open-end slots in the ground plane, respectively. Prototype of proposed antenna with multi-tracks has been fabricated and tested in free space. The comparison between the simulated and measured reflection coefficient has been done and found in good ...