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Comprehensive Design and Propagation Study of a Compact Dual Band Antenna for Healthcare Applications [PDF]

open access: yesJournal of Sensor and Actuator Networks, 2015
In this paper, a dual band planar inverted F antenna (PIFA) has been investigated for cooperative on- and off-body communications. Free space and on-body performance parameters like return loss, bandwidth, radiation pattern and efficiency of this antenna
Mohammad Monirujjaman Khan   +2 more
doaj   +4 more sources

Adaptive antenna system by ESP32-PICO-D4 and its application to web radio system

open access: yesHardwareX, 2018
Adaptive antenna technique has an important role in the IoT environment in order to establish reliable and stable wireless communication in high congestion situation. Even if knowing antenna characteristics in advance, electromagnetic wave propagation in
Toshiro Kodera
doaj   +4 more sources

Study on deployment mechanism of the satellite umbrella antenna

open access: yesHangkong gongcheng jinzhan, 2023
The relaxation and jumping from slot of the power rope of the antenna deployment mechanism are likely to occur in the process of antenna deployment and folding.
LIU Tingting   +3 more
doaj   +1 more source

Limiting Accuracy of Height Measurement for a Precision Radar Altimeter in a Low Altitude Flying Vehicle above the Sea Surface

open access: yesRemote Sensing, 2021
This study presents mathematical analysis and numerical modeling for the estimation of measurement errors of height estimation over the sea surface for a precision radar altimeter installed in a low altitude flying vehicle.
Aleksandr I. Baskakov   +3 more
doaj   +1 more source

Sub-terahertz silicon-based on-chip absorption spectroscopy using thin-film model for biological applications

open access: yesScientific Reports, 2022
Spectroscopy in the sub-terahertz (sub-THz) range of frequencies has been utilized to study the picosecond dynamics and interaction of biomolecules. However, widely used free-space THz spectrometers are typically limited in their functionality due to low
Seyed Ali Hosseini Farahabadi   +5 more
doaj   +1 more source

WGM-Based Sensing of Characterized Glucose- Aqueous Solutions at mm-Waves

open access: yesIEEE Access, 2020
A newly-developed commercial coaxial probe kit (DAK-TL) is used to characterize the electromagnetic properties of glucose-loaded samples prepared at a range of concentrations 0.7-1.2 mg/ml similar to Type-2 normal diabetics in a broad range of ...
Ala Eldin Omer   +3 more
doaj   +1 more source

Simulation of Small Radio Telescope Antenna Parameters at Frequency of 1.42 GHz

open access: yesIraqi Journal of Physics, 2022
The paper presents an overview of theoretical aspects of small radio telescope antenna parameters. The basic parameters include antenna beamwidth, antenna gain, aperture efficiency, and antenna temperature.
Uday E Jallod   +2 more
doaj   +1 more source

Effect of Beam Angle of the Transmitting Antenna on Radio Wave Coverage in the Region Containing Tunnel Entrance

open access: yesIEEE Access, 2022
Radio wave coverage in open-confined mixed space along the railway is studied in this paper. The space along the railway can be classified into three kinds of spaces, that are, open space, confined space and the open-confined mixed space.
Zhenyu Zhao, Junhong Wang, Weibin Hou
doaj   +1 more source

Blood Glucose Level Monitoring Using an FMCW Millimeter-Wave Radar Sensor

open access: yesRemote Sensing, 2020
In this article, a novel sensing approach is presented for glucose level monitoring where a robust low-power millimeter(mm)-wave radar system is used to differentiate between blood samples of disparate glucose concentrations in the range 0.5 to 3.5 mg/mL.
Ala Eldin Omer   +3 more
doaj   +1 more source

Safe Helicopter Landing on Unprepared Terrain Using Onboard Interferometric Radar

open access: yesSensors, 2020
This letter proposes a radar interferometric survey system for the ground surface of helicopter landing sites. This system generates high-quality three-dimensional terrain surface topography data and estimates the slope of the site with the required ...
Pavel E. Shimkin   +3 more
doaj   +1 more source

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