Miniaturization of Circularly Polarized Patch Antenna for RFID Reader Applications

This paper presents a new circular monopole antenna with triple-band characteristics that can operate in both ultra-high frequency (UHF) and ultra-wideband (UWB) and can be integrated into a radio-frequency identification (RFID) system reader board. The antenna was built with a patch and a coplanar waveguide (CPW) feed microstrip line to meet the UHF/UWB bandwidth requirements for RFID applications. The designed antenna has a size of 70 mm × 60 mm × 0.8 mm. CST Microwave Studio simulations were used to validate the proposed antenna, which had a maximum gain of 4.8 dBi. Furthermore, the designed antenna had a radiation pattern that spanned the full working band. To interact with RFID tags, the antenna was built and installed into the RFID reader board. The simulation and measurement findings showed good agreement. Experiments indicated that the UHF-RFID performance of the monopole antenna was comparable to that of existing commercial solutions.

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“…A circular patch disc monopole antenna with two-sided corner truncation and two circular and (+)-shaped slots make up this antenna [27].…”

Section: Rfid Reader Antenna Design With Triple Bandsmentioning

confidence: 99%

A UHF/UWB Monopole Antenna Design Process Integrated in an RFID Reader Board

Mekki

Necibi

Lakhdhar

et al. 2022

J Electromagn Eng Sci

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“…The CST Studio Suite [41] is used to simulate and analyze antenna parameters [42][43][44]. CST and all similar commercial software provide also a monitor function for computing the Specific Absorption Rate (SAR) of energy deposition in the tissues.…”

Section: Limitations Of Present Radiofrequency Softwarementioning

confidence: 99%

Magnetite Particle Presence in the Human Brain: A Computational Dosimetric Study to Emphasize the Need of a Complete Assessment of the Electromagnetic Power Deposition at 3.5 GHz

Vatamanu

Miclăuș

2021

Eng. Technol. Appl. Sci. Res.

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The growing evidence of increased magnetite nanoparticles (both endo- and exo-genic) in the human brain raises the importance of assessing the entire power deposition when electromagnetic waves at GHz frequencies propagate in such tissues. This frequency range corresponds to many popular portable communication devices that emit radiation close to a human's head. At these frequencies, the current dosimetric numerical codes can not accurately compute the magnetic losses part. This is due to the lack of an implemented computational algorithm based on solving the coupled Maxwell and Landau-Lifshitz-Gilbert equations, in the case of magneto-dielectrics, considering eddy currents losses and specific properties of magnetic sub-millimetric particles. This paper focuses on analyzing the limits and the inconsistencies when using commercial dosimetric numerical software to analyze the total absorbed power in brain models having ferrimagnetic content and being exposed to 3.5GHz electromagnetic waves. Magnetic losses computed using Polder’s permeability tensor as constitutive relation lead to unreliable results. However, using such software can provide a preliminary view of the electromagnetic impact of ultra- and super-high frequencies on magnetic-dielectric tissues.

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“…With the IoT, we can monitor a patient's health such and observing his severe or chronic disease [1] and tracking medical members and properties through smart application devices by using Wireless Sensor Network (WSN) nodes [2,3] or RFID tags that are connected to the server. RFID is a system that aims to exchange identification information or data from the tag to the RFID reader through an RF transceiver antenna [4] to carry out specific applications based on the data stored in the tag [5]. Presently, RFID technology system devices have been developed to accommodate low-power devices with enhanced data transfer capabilities [6].…”

Section: Introductionmentioning

confidence: 99%

A Fast Digital Phase Frequency Detector with Preset Word Frequency Searching in ADPLL for a UHF RFID Reader

Ishak

Sampe

Nayan

et al. 2022

Eng. Technol. Appl. Sci. Res.

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An All-Digital Phase-Locked Loop (ADPLL) is an architecture that is widely employed in the communication system due to the advancement of the Complementary Metal-Oxide-Semiconductor (CMOS) technology process. A 2.4GHz Radio Frequency Identification (RFID) system needs a frequency synthesizer in the local oscillator architecture of the transceiver to generate a stable frequency tuning range Therefore, in this paper, a Digital Phase-Frequency Detector (DPFD) is designed to achieve the phase and frequency acquisition in the ADPLL system. The proposed DPFD is divided into two main parts, the first is the Phase Detector (PD) and the second is the Frequency Detector (FD). The PD has managed to detect the presence of the phase difference by recognizing two different input signals. The FD, on the other hand, is capable to detect the higher frequency by identifying the output signals from the PD in digital formation. In addition, a control unit module is developed to control and adjust the Preset Word (PW) for the system by using a binary search scheme. Comparison results show that the final value of the PW from the simulation is the same as from the manual calculation (theoretical values). The digital PFD and the PW control modules are designed and simulated by using Verilog HDL code. These two designed modules will be integrated into the targeted ADPLL to achieve fast locking performance and ultra-low power for Ultra-High Frequency (UHF) RFID applications.

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Miniaturization of Circularly Polarized Patch Antenna for RFID Reader Applications

Cited by 20 publications

References 17 publications

A UHF/UWB Monopole Antenna Design Process Integrated in an RFID Reader Board

A UHF/UWB Monopole Antenna Design Process Integrated in an RFID Reader Board

Magnetite Particle Presence in the Human Brain: A Computational Dosimetric Study to Emphasize the Need of a Complete Assessment of the Electromagnetic Power Deposition at 3.5 GHz

A Fast Digital Phase Frequency Detector with Preset Word Frequency Searching in ADPLL for a UHF RFID Reader

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