Design of miniaturized fractal quasi-self complimentary antenna for UWB applications

Wahab, M. G.; El-Hameed, Anwer S. Abd; Swelam, W.; ElAzeem, Mohamed H. Abd

doi:10.1109/aps.2016.7696611

Cited by 9 publications

(2 citation statements)

References 3 publications

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“…Ultra-wideband (UWB) and NB antennas are increasingly being used for vital sign detection (VSD) due to their ability to operate at low power and their ability to provide accurate and reliable measurements. UWB antennas are capable of transmitting and receiving short pulses of electromagnetic waves that can penetrate through obstacles and reflect off the human body to provide highly precise measurements of vital signs such as heart rate and respiration rate [ 2 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 ].…”

Section: Introductionmentioning

confidence: 99%

A Comparative Study of Narrow/Ultra-Wideband Microwave Sensors for the Continuous Monitoring of Vital Signs and Lung Water Level

Abd El-Hameed,

Elsheakh,

Elashry

et al. 2024

Sensors

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This article presents an in-depth investigation of wearable microwave antenna sensors (MASs) used for vital sign detection (VSD) and lung water level (LWL) monitoring. The study looked at two different types of MASs, narrowband (NB) and ultra-wideband (UWB), to decide which one was better. Unlike recent wearable respiratory sensors, these antennas are simple in design, low-profile, and affordable. The narrowband sensor employs an offset-feed microstrip transmission line, which has a bandwidth of 240 MHz at −10 dB reflection coefficient for the textile substrate. The UWB microwave sensor uses a CPW-fed line to excite an unbalanced U-shaped radiator, offering an extended simulated operating bandwidth from 1.5 to 10 GHz with impedance matching ≤−10 dB. Both types of microwave sensors are designed on a flexible RO 3003 substrate and textile conductive fabric attached to a cotton substrate. The specific absorption rate (SAR) of the sensors is measured at different resonant frequencies on 1 g and 10 g of tissue, according to the IEEE C95.3 standard, and both sensors meet the standard limit of 1.6 W/kg and 2 W/kg, respectively. A simple peak-detection algorithm is used to demonstrate high accuracy in the detection of respiration, heartbeat, and lung water content. Based on the experimental results on a child and an adult volunteer, it can be concluded that UWB MASs offer superior performance when compared to NB sensors.

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Section: Introductionmentioning

confidence: 99%

A Comparative Study of Narrow/Ultra-Wideband Microwave Sensors for the Continuous Monitoring of Vital Signs and Lung Water Level

Abd El-Hameed,

Elsheakh,

Elashry

et al. 2024

Sensors

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“…The combination of fractal technology and self-complementary structure can achieve miniaturization and adjust impedance matching performance better, but it will make the structure more complex and increase the difficulty of fabrication. [16][17][18] In this letter, a miniaturized broadband QSCA comprising a branch patch and a wide slot is presented. With a coplanar waveguide (CPW)-like matching technique, a wide frequency band property of QSCA is achieved, which can cover frequency bands of 1.05-1.28 GHz and 2.13-4 GHz.…”

Section: Introductionmentioning

confidence: 99%

A printed multiband quasi‐self‐complementary antenna for broadband applications

Guo

Feng

Bai

et al. 2022

Int J RF Mic Comp-Aid Eng

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A miniaturized multiband broadband quasi-self-complementary antenna (QSCA) is presented, which mainly consists of a third-step radiation patch on the right and a third-step wide slot on the left. With the help of an L-shaped metal ground patch, a coplanar waveguide (CPW)-like matching technique is used to improve the impedance matching of the antenna. To further compress the antenna, a U-shaped slot and a branch patch are loaded in the antenna, which makes the proposed antenna exhibit a broadband property with a compact size. The measured results show that the proposed antenna can cover 698-960 MHz (low band), 1427-1518 MHz, 1710-2690 MHz (middle band), and 3300-3800 MHz (high band) successfully. The compact size (100 mm Â 25 mm) and simply printed geometry is suitable for wireless broadband devices.

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Miniaturized triple band-notched quasi-self complementary fractal antenna with improved characteristics for UWB applications

El-Hameed

Wahab

Elboushi

et al. 2019

AEU - International Journal of Electronics and Communications

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Design of miniaturized fractal quasi-self complimentary antenna for UWB applications

Cited by 9 publications

References 3 publications

A Comparative Study of Narrow/Ultra-Wideband Microwave Sensors for the Continuous Monitoring of Vital Signs and Lung Water Level

A Comparative Study of Narrow/Ultra-Wideband Microwave Sensors for the Continuous Monitoring of Vital Signs and Lung Water Level

A printed multiband quasi‐self‐complementary antenna for broadband applications

Miniaturized triple band-notched quasi-self complementary fractal antenna with improved characteristics for UWB applications

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