scholarly journals Field Optimization using Segmented Patch Antennas at High Frequencies

2019 ◽  
Vol 8 (4) ◽  
pp. 11259-11262
Keyword(s):  
Communication Technology ◽  
Radio Frequency Identification ◽  
Patch Antennas ◽  
Frequency Range ◽  
High Frequencies ◽  
Far Fields ◽  
Coefficient Of Reflection ◽  
Linearly Polarized ◽  
Reader Antenna ◽  
Frequency Identification

in recent day’s communication technology has increased in every field where in antenna propagation transmission of signals to the other end is dependent on antennas. This propagation should be appropriate in both the fields as near and far fields for effectively covering which RFIDs are used which abbreviate as radio frequency identification which are considered as reader antenna developed for operating in near and far fields with high frequency band range. Here in this paper segmented loop designed of patch antenna is developed and the fabrication of antenna is done where the frequency range will be 900 MHz approximately with coefficient of reflection as less than 8dB which covers major UHB frequency range of band. It has linearly polarized pattern of radiation which provides gain of 6dBi and the capacity of reading of antenna is from 12-15m for both the applications of near and far field.

scholarly journals A Compact RFID Reader Antenna for UHF Near-Field and Far-Field Operations

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
Lai Xiao zheng ◽  
Xie Zeming ◽  
Cen Xuanliang
Keyword(s):  
Radio Frequency Identification ◽  
Near Field ◽  
Split Ring Resonator ◽  
Impedance Bandwidth ◽  
Far Field ◽  
Uhf Rfid ◽  
Linearly Polarized ◽  
Reader Antenna ◽  
Frequency Identification ◽  
Linearly Polarized Radiation

A compact loop antenna is presented for mobile ultrahigh frequency (UHF) radio frequency identification (RFID) application. This antenna, printed on a 0.8 mm thick FR4 substrate with a small size of 31 mm × 31 mm, achieves good impedance bandwidth from 897 to 928 MHz, which covers USA RFID Band (902–928 MHz). The proposed loop configuration, with a split-ring resonator (SRR) coupled inside it, demonstrates strong and uniform magnetic field distribution in the near-field antenna region. Its linearly polarized radiation pattern provides available far-field gain. Finally, the reading capabilities of antenna are up to 56 mm for near-field and 1.05 m for far-field UHF RFID operations, respectively.

scholarly journals A High Throughput Anticollision Protocol to Decrease the Energy Consumption in a Passive RFID System

2017 ◽  
Vol 2017 ◽  
pp. 1-10 ◽  
Author(s):  
Hugo Landaluce ◽  
Laura Arjona ◽  
Asier Perallos ◽  
Lars Bengtsson ◽  
Nikola Cmiljanic
Keyword(s):  
Energy Consumption ◽  
Radio Frequency Identification ◽  
Rfid Technology ◽  
Existing Problems ◽  
Rfid System ◽  
Collision Problem ◽  
Low Energy Consumption ◽  
Reader Antenna ◽  
Frequency Identification ◽  
Passive Rfid

One of the main existing problems in Radio Frequency Identification (RFID) technology is the tag collision problem. When several tags try to respond to the reader under the coverage of the same reader antenna their messages collide, degrading bandwidth and increasing the number of transmitted bits. An anticollision protocol, based on the classical Binary Tree (BT) protocol, with the ability to decrease the number of bits transmitted by the reader and the tags, is proposed here. Simulations results show that the proposed protocol increases the throughput with respect to other recent state-of-the-art protocols while keeping a low energy consumption of a passive RFID system.

Investigation on the chipless RFID tag with a UWB pulse using a UWB IR-based reader

2021 ◽  
pp. 1-10
Author(s):  
Kawther Mekki ◽  
Omrane Necibi ◽  
Hugo Dinis ◽  
Paulo Mendes ◽  
Ali Gharsallah
Keyword(s):  
Radio Frequency Identification ◽  
Ultra Wideband ◽  
Rfid Tag ◽  
Triangular Patch ◽  
Chipless Rfid ◽  
Frequency Domains ◽  
Measurement Results ◽  
Reader Antenna ◽  
Frequency Identification ◽  
Working Principle

Abstract In order to encrypt/encode data based on the magnitude level of the radar cross-section (RCS), we propose an approach with a precise estimation considering the resonant characteristics of a multipatch backscatter-based chipless radio frequency identification (RFID) dedicated for chipless tags depolarization. The working principle is based on the polarization mismatch between the tag and the reader antenna to control the magnitude of the backscatter, which allows a reliable detection in real environments. We introduce in this paper a new 4-bit chipless RFID tag with an enhanced RCS, based on a triangular patch antenna with multiple resonators. Additionally, we propose an ultra-wideband impulse radar (UWB-IR)-based reader that interrogates the chipless tag with a UWB pulse, and the received backscatter was studied in both time- and frequency-domains. The antenna was operating from 4.7 to 6.1 GHz, a band allocated for RFID systems. The obtained experimental measurement results in the environment of anechoic chamber were exceptionally relevant to validate the simulation results.

scholarly journals Miniaturized Chipless RFID Tags Based on Periodically Loaded Microstrip Structure

2019 ◽  
Vol 9 (5) ◽  
pp. 4679-4684
Author(s):  
M. Added ◽  
K. Rabaani ◽  
S. Chabaan ◽  
N. Boulejfen
Keyword(s):  
Radio Frequency Identification ◽  
Low Cost ◽  
Resonant Circuit ◽  
Rfid Tags ◽  
Frequency Range ◽  
Rfid Tag ◽  
Chipless Rfid ◽  
Frequency Identification ◽  
Coding Capacity ◽  
Microstrip Structure

A compact chipless radio frequency identification (RFID) tag-based on slow-wave technology is introduced in this paper. The tag consists of a resonant circuit based on open stub resonators periodically loaded by shunt stubs allowing a coding capacity of 9 bits and operating in a frequency range from 2 to 4GHz. The receiving and transmitting antennas of the tag are particularly designed to minimize the tag size as much as possible. The proposed tag presents a robust bit pattern with a compact and fully printable structure using FR4 substrate for a low-cost tag.

scholarly journals An Internet of Things System Based on Device-to-Device Communication Technology and Radio-Frequency Identification

2018 ◽  
Vol 14 (10) ◽  
pp. 210
Author(s):  
Cheng Huang ◽  
Yongbo Lv
Keyword(s):  
Internet Of Things ◽  
Radio Frequency ◽  
Communication Technology ◽  
Mobile Communication ◽  
Radio Frequency Identification ◽  
Device To Device ◽  
Research Findings ◽  
Frequency Identification ◽  
Application Potential ◽  
Short Time

<span style="font-family: 'Times New Roman',serif; font-size: 10pt; mso-fareast-font-family: 'Times New Roman'; mso-fareast-language: DE; mso-ansi-language: EN-US; mso-bidi-language: AR-SA;">This paper aims to build a mobile communication system suitable for different application scenarios of the Internet of Things (IoT). For this purpose, an IoT system was developed based on device-to-device (D2D) communication technology and radio-frequency identification (RFID). The D2D-RFID-based IoT system combines the merits of mobile communication (e.g. 4G) and the RFID. The analysis shows that the proposed system boasts good mobility, stable transmission, short time delay, fixed IP, and no need of a central server. The research findings have a great application potential in different IoT scenarios.</span>

scholarly journals An UHF RFID Reader Antenna with Multitag Identification for Extremely Low-Temperature Medical Systems

2020 ◽  
Vol 2020 ◽  
pp. 1-11
Author(s):  
Ji S. Jung ◽  
Jung N. Lee ◽  
Joung M. Kim ◽  
Jong K. Park
Keyword(s):  
Radio Frequency Identification ◽  
Symmetric Design ◽  
Uhf Rfid ◽  
Medical Systems ◽  
Power Dividers ◽  
High Isolation ◽  
The North ◽  
Reader Antenna ◽  
Frequency Identification ◽  
Two Hybrid

A radio frequency identification reader antenna having multitag identification for medical systems is presented, which consists of four PIFAs, two hybrid couplers, and four power dividers. The high isolation is achieved by the symmetric design of the antenna geometry and four power dividers, which are fed by two hybrid couplers. The experimental results show an isolation of more than 40 dB in the North American (902–928 MHz), Korean (917–923.5 MHz), and Japanese (916.7–923.5 MHz) RFID frequency bands.

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