Design and Analysis of Wideband Monopole Antennas for Flexible/Wearable Wireless Device Applications

Reddy, Bobbili Naga Balarami; Kumar, P Sandeep; Rao, T. Rama; Tiwari, Nishesh; Balachary, M.

doi:10.2528/pierm17092107

Cited by 17 publications

(4 citation statements)

References 15 publications

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“…This system can be installed inside any EMS vehicle without requiring an expert radiologist’s assistance for the diagnosis process. Some works 30 , 48 , 49 have investigated the sensor-type antenna design for medical applications by considering the acceptable amount of SAR 50 , 51 . In their work, the reflection characteristic of the antenna has a sharp resonance to assist easy distinction and interpretation in various medical applications.…”

Section: Discussionmentioning

confidence: 99%

Microwave bone fracture diagnosis using deep neural network

Beyraghi,

Ghorbani,

Shabanpour

et al. 2023

Sci Rep

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This paper studies the feasibility of a deep neural network (DNN) approach for bone fracture diagnosis based on the non-invasive propagation of radio frequency waves. In contrast to previous “semi-automated” techniques, where X-ray images were used as the network input, in this work, we use S-parameters profiles for DNN training to avoid labeling and data collection problems. Our designed network can simultaneously classify different complex fracture types (normal, transverse, oblique, and comminuted) and estimate the length of the cracks. The proposed system can be used as a portable device in ambulances, retirement houses, and low-income settings for fast preliminary diagnosis in emergency locations when expert radiologists are not available. Using accurate modeling of the human body as well as changing tissue diameters to emulate various anatomical regions, we have created our datasets. Our numerical results show that our design DNN is successfully trained without overfitting. Finally, for the validation of the numerical results, different sets of experiments have been done on the sheep femur bones covered by the liquid phantom. Experimental results demonstrate that fracture types can be correctly classified without using potentially harmful and ionizing X-rays.

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Section: Discussionmentioning

confidence: 99%

Microwave bone fracture diagnosis using deep neural network

Beyraghi,

Ghorbani,

Shabanpour

et al. 2023

Sci Rep

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“…Many other polymer-based flexible UWB antennas were reported in the literature. These include liquid crystal polymer [ 158 , 159 , 160 , 161 ], polydimethylsiloxane (PDMS) [ 162 , 163 , 164 ], graphene-assembled film [ 165 ], artificial magnetic conductor (AMC) [ 166 , 167 , 168 , 169 , 170 ], PET [ 171 , 172 , 173 ], paper [ 174 ], and polyamide [ 175 , 176 , 177 ].…”

Section: Applications Of Flexible Antennas Under Different Frequenmentioning

confidence: 99%

Flexible Antennas: A Review

et al. 2020

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The field of flexible antennas is witnessing an exponential growth due to the demand for wearable devices, Internet of Things (IoT) framework, point of care devices, personalized medicine platform, 5G technology, wireless sensor networks, and communication devices with a smaller form factor to name a few. The choice of non-rigid antennas is application specific and depends on the type of substrate, materials used, processing techniques, antenna performance, and the surrounding environment. There are numerous design innovations, new materials and material properties, intriguing fabrication methods, and niche applications. This review article focuses on the need for flexible antennas, materials, and processes used for fabricating the antennas, various material properties influencing antenna performance, and specific biomedical applications accompanied by the design considerations. After a comprehensive treatment of the above-mentioned topics, the article will focus on inherent challenges and future prospects of flexible antennas. Finally, an insight into the application of flexible antenna on future wireless solutions is discussed.

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“…The researchers for wireless applications have presented several wideband monopole antennas. For instance, Reddy et al in [26] designed a flexible wideband monopole antenna for body-centric wireless communications. While, Mohandoss et al in [27] designed a planar monopole fractal antenna to enhance the bandwidth for the personal wireless area and UWB applications.…”

Section: Infocommunications Journalmentioning

confidence: 99%

A Novel UWB Monopole Antenna with Reconfigurable Band Notch Characteristics Based on PIN Diodes

Alnaiemy¹,

Nagy²

2021

Infocommunications journal

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Our design for a novel UWB monopole antenna structure with reconfigurable band notch characteristics based on PIN diodes is presented in this paper. The proposed antenna is comprised of a modified circular patch and a partial ground plane. The band-notch characteristics are achieved by etching a slot on the partial ground plane and inserting three PIN diodes into the slots for adjusting the operating antenna bands. The reconfigurability is achieved by adding three PIN diodes to obtain eight states with UWB, dual and triple operating bands which can be obtained by changing the PIN state from ON to OFF, and vice versa. The proposed design shows a simple biasing process to switch the frequency bands with insignificant gain variation and low radiation efficiency reduction. The reconfigurability of the frequency is accomplished by adjusting the effective slot length through modifying the PIN diodes states at the desired operating bands. The desired operating frequency bands can be obtained by switching the diodes. A systematic parametric study based on a numerical analysis is invoked to verify and refine the proposed performance. The proposed antenna is fabricated on FR-4 substrate with dimensions of 50×60×1 mm3. The proposed antenna performance was tested experimentally and compared to the simulated results from CSTMW based on FIT. Experimental results were in concordance with simulated results. We found that the proposed antenna design had simple geometry and it was easy to control the frequency bands to suit the applications of WiMAX and WiFi systems.

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Design and Analysis of Wideband Monopole Antennas for Flexible/Wearable Wireless Device Applications

Cited by 17 publications

References 15 publications

Microwave bone fracture diagnosis using deep neural network

Microwave bone fracture diagnosis using deep neural network

Flexible Antennas: A Review

A Novel UWB Monopole Antenna with Reconfigurable Band Notch Characteristics Based on PIN Diodes

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