UHF RFID Wireless Communication System for Real Time ECG Monitoring

2022

Sensors

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Wireless sensor networks (WSNs) systems based on Internet of Things (IoT) have developed rapidly in recent years. However, interference is a major obstacle to relatively long-distance communications in such networks. It is also very complicated and challenging to fix the exact location of tags in the IoT sensor networks. To overcome these problems, in this paper, an electronic steering parasitic array radiator (ESPAR) antenna used as a beamformer to handle the interference and extend the communication range from the sensors or tags is suggested. In addition, an efficient method, namely beam scanning (BS), is proposed to find the directions of tags. The beam scanning method (BSM) can be used for the selective beam switching (SBS) system by designing an ESPAR or array of ESPAR antennas with the help of CST studio. The antennas exhibit higher gain (8.17 dBi, 11.40 dBi) and proper radiation pattern at a particular direction. In addition, the MATLAB simulation findings indicate that the proposed BSM algorithm provides longer communication range, i.e., 25 m. In order to maximize range while avoiding interference, it is necessary to determine the direction and precise orientation of the tag in the WSN communication systems. Consequently, this work could be applied to an IoT sensor network such as an electrocardiogram system by providing better advantages such as higher localization accuracy and longer operating range.

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Section: Introductionmentioning

confidence: 99%

IoT Sensor Network Using ESPAR Antenna Based on Beam Scanning Method for Direction Finding

2022

Sensors

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“…There are many methods to minimize this interference problem, but the most effective one is to apply high gain directional antenna‐like electronically steerable parasitic array radiator (ESPAR) antenna. ESPAR antennas have lower design complexity, higher gains, and could operate at the ISM band of 2.40 GHz frequency 8–12 …”

Section: Introductionmentioning

confidence: 99%

“…ESPAR antennas have lower design complexity, higher gains, and could operate at the ISM band of 2.40 GHz frequency. [8][9][10][11][12] Utterly, the array type antennas were introduced in 1940s. This revolutionary development was benevolent for wireless communication systems as it facilitates the reception and delivery of information with minimum interference.…”

mentioning

confidence: 99%

ESPAR array design for the UHF RFID wireless sensor communication system

2023

Int J Communication

In this paper, in order to improve the received signal strength (RSS) and signal quality, three arrays of electronically steerable parasitic array radiator (ESPAR) antennas are suggested for the ultra-high frequency (UHF) radio frequency identification (RFID) communication and sensing system applications.Instead of the single antenna, the array antennas have recently been widely used in many communication systems because of their peak gains, better radiation patterns, and higher radiation efficiency. Also, there are some important issues to use the antenna array like high data rates in wireless communication systems and to better understand the many targets or sensors. In this article, a wireless sensor network (WSN) is being investigated to overcome multipath fading and interference by antenna nulling technology that can be achieved through beam control ESPAR array antennas. The proposed ESPAR array antennas exhibit higher gains like 9.63, 10.2, and 12 dBi and proper radiation patterns from one array to another. Moreover, we investigate the mutual coupling effect on the performance of array antennas with different spacing (0.5λ, 0.75λ, λ) and configurations. It is found that the worst mutual coupling reduced by À28 to À34 dB for 2 Â 2 array, À3 to À43 dB for 2 Â 3 array, and finally À42 dB to À51 dB due to the antenna spacing from 0.5λ to λ. Thus, these suggested antennas could effectively be applied in the WSN communication systems, internet of things (IoT) networks, and massive wireless and backscatter communication systems.

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Design of ESPAR Antenna Array for High Gain Communication Services

2022 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (AP-S/URSI)

2022