Microstrip diplexer design based on two square open loop bandpass filters for RFID applications

2018 ◽  
Vol 10 (4) ◽  
pp. 412-421 ◽  
Author(s):  
Hafid Tizyi ◽  
Fatima Riouch ◽  
Abdelwahed Tribak ◽  
Abdellah Najid ◽  
Angel Mediavilla
Keyword(s):  
Radio Frequency Identification ◽  
Patch Antenna ◽  
High Selectivity ◽  
Open Loop ◽  
High Isolation ◽  
Compact Size ◽  
Frequency Identification ◽  
Band Pass ◽  
Chebychev Approximation ◽  
Rfid Applications

AbstractIn this work, a simple and efficient approach to design a microstrip diplexer is proposed. It is based on the combination of two compact Square Open Loop Resonator band pass filters. These filters are designed for Radio Frequency Identification application at 2.45 GHz frequency. Using the Chebychev approximation, the two filters and diplexer are designed, simulated, fabricated, and measured. The results show that the diplexer presents a high selectivity, a good insertion loss and high isolation (>40 dB) with the compact size. The diplexer also shows a good performance when associated with the patch antenna operating at 2.45 GHz.

scholarly journals A rectangular CSRR based microstrip UHF reader patch antenna for RFID applications

2020 ◽  
Vol 17 (3) ◽  
pp. 1434
Author(s):  
Syamimi Mohd Norzeli ◽  
Ismarani Ismail ◽  
Norashidah Md Din ◽  
Mohd Tarmizi Ali ◽  
Ali Abd Almisreb ◽  
...  
Keyword(s):  
Radio Frequency Identification ◽  
Patch Antenna ◽  
Return Loss ◽  
Ring Resonator ◽  
Split Ring Resonator ◽  
Split Ring ◽  
Total Size ◽  
Complementary Split Ring Resonator ◽  
Frequency Identification ◽  
Rfid Applications

<span>This paper presents a compact microstrip ultra-high frequency (UHF) reader patch antenna with complementary split ring resonator (CSRR) for radio frequency identification (RFID). The total size of the antenna is 208 × 208 × 1.6 mm<sup>3</sup>. The proposed antenna is designed, fabricated and measured in order to verify the proposed concept. The characterization for radiation parameters, like return loss, radiation pattern and antenna gain have been done experimentally. The proposed antenna is operated at 921 MHz for and achieved a gain of 8.285 dBi. All simulations in this work have been carried out by means of the commercial computer simulation technology (CST) software. In compare to the simulated results, the measured outcomes are promised.</span>

Open Source Object Directory Services for Inter-Enterprise Tracking and Tracing Applications

2015 ◽  
pp. 1884-1902
Author(s):  
Konstantinos Mourtzoukos ◽  
Nikos Kefalakis ◽  
John Soldatos
Keyword(s):  
Open Source ◽  
Radio Frequency Identification ◽  
Open Loop ◽  
Object Naming ◽  
Enterprise Applications ◽  
Frequency Identification ◽  
Administrative Domains ◽  
Directory Services ◽  
The Internet Of Things ◽  
Rfid Applications

Despite the proliferation of RFID (Radio Frequency Identification) applications, there are still only a limited number of open-loop inter-enterprise applications that address global supply chains. The implementation of such inter-enterprise applications hinges on standards and techniques for discovering and accessing RFID tagged objects across different repositories of RFID information residing across different administrative domains. In this chapter, the authors introduce an open and novel implementation of an ONS (Object Naming Service) solution for inter-enterprise tracking and tracing RFID applications. The solution is part of the open source AspireRFID project and provides a sound basis for integrating tracking (“google-of-things” like) applications for the RFID and the Internet-of-Things (IoT). As part of the presentation of the solution, this chapter illustrates the main challenges associated with the integration of inter-enterprise applications, along with strategies for confronting them.

scholarly journals Compact Circularly Polarized Multiband Antennas for RFID Applications

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
H. M. El Misilmani ◽  
M. Al-Husseini ◽  
K. Y. Kabalan ◽  
A. El-Hajj
Keyword(s):  
Radio Frequency ◽  
Radio Frequency Identification ◽  
Microstrip Line ◽  
Ground Plane ◽  
Dual Band ◽  
Circularly Polarized ◽  
Multiband Antennas ◽  
Compact Size ◽  
Frequency Identification ◽  
Rfid Applications

This paper presents multiband circularly polarized (CP) antennas for radio frequency identification (RFID). A coax-fed and a microstrip-line-fed antennas having optimized cross-slots in their patches are first designed for dual-band CP operation. The microstrip-line-fed design is then modified, by incorporating a U-shaped slot in its partial ground plane, to achieve additional operation band with a CP characteristic. Simulation and measured results of the presented designs are reported. The measured results are in accordance with the computed ones. The compact size and CP property make these designs suitable for RFID applications.

Open Source Object Directory Services for Inter-Enterprise Tracking and Tracing Applications

2015 ◽  
pp. 80-97
Author(s):  
Konstantinos Mourtzoukos ◽  
Nikos Kefalakis ◽  
John Soldatos
Keyword(s):  
Open Source ◽  
Radio Frequency Identification ◽  
Open Loop ◽  
Object Naming ◽  
Enterprise Applications ◽  
Frequency Identification ◽  
Administrative Domains ◽  
Directory Services ◽  
The Internet Of Things ◽  
Rfid Applications

Despite the proliferation of RFID (Radio Frequency Identification) applications, there are still only a limited number of open-loop inter-enterprise applications that address global supply chains. The implementation of such inter-enterprise applications hinges on standards and techniques for discovering and accessing RFID tagged objects across different repositories of RFID information residing across different administrative domains. In this chapter, the authors introduce an open and novel implementation of an ONS (Object Naming Service) solution for inter-enterprise tracking and tracing RFID applications. The solution is part of the open source AspireRFID project and provides a sound basis for integrating tracking (“google-of-things” like) applications for the RFID and the Internet-of-Things (IoT). As part of the presentation of the solution, this chapter illustrates the main challenges associated with the integration of inter-enterprise applications, along with strategies for confronting them.

scholarly journals Compact Tri-band Bandpass Filter Based on Asymmetric Step Impedance Resonators for WiMAX and RFID Systems

2021 ◽  
Vol 21 (4) ◽  
pp. 316-321
Author(s):  
Abdul Basit ◽  
Muhammad Irfan Khattak ◽  
Ayman Althuwayb ◽  
Jamel Nebhen
Keyword(s):  
Radio Frequency Identification ◽  
Bandpass Filter ◽  
Coupled Resonators ◽  
Simple Method ◽  
Rfid Systems ◽  
Fundamental Frequencies ◽  
Half Wavelength ◽  
Frequency Identification ◽  
One Step ◽  
Rfid Applications

In this article, a simple method is developed to design a highly miniaturized tri-band bandpass filter (BPF) utilizing two asymmetric coupled resonators with one step discontinuity and one uniform impedance resonator (UIR) for worldwide interoperability for microwave access (WiMAX) and radio frequency identification (RFID) applications. The first and second passbands located at 3.7 GHz and 6.6 GHz are achieved through two asymmetric coupled step impedance resonators (SIRs), while the third passband, centered at 9 GHz, is achieved using a half-wavelength UIR, respectively. The fundamental frequencies of this BPF are implemented by tuning the physical length ratio (α) and impedance ratio (R) of the asymmetric SIRs. The proposed filter is designed and fabricated with a circuit dimension of 13.69 mm × 25 mm (0.02 λg × 0.03 λg), where λg represents the guided wavelength at the first passband. The experimental and measured results are provided with good matching.

scholarly journals Compact Dual-Band Circularly Polarized Stacked Patch Antenna for Microwave-Radio-Frequency Identification Multiple-Input-Multiple-Output Application

2021 ◽  
Vol 2021 ◽  
pp. 1-13
Author(s):  
Enze Zhang ◽  
Andrea Michel ◽  
Paolo Nepa ◽  
Jinghui Qiu
Keyword(s):  
Radio Frequency ◽  
Radio Frequency Identification ◽  
Patch Antenna ◽  
Multiple Input Multiple Output ◽  
Dual Band ◽  
Circularly Polarized ◽  
Multiple Input ◽  
Input Multiple Output ◽  
Frequency Identification ◽  
Stacked Patch Antenna

A compact, low-profile, two-port dual-band circularly polarized (CP) stacked patch antenna for radio-frequency identification (RFID) multiple-input-multiple-output (MIMO) readers is proposed, which employs the shared-aperture technique. The proposed antenna adopts a 1.524 mm thickness Rogers Ro4350b substrate with relative permittivity of 3.48. Two pairs of isolated ports are working at two microwave- (MW-) RFID bands (2.4–2.485 GHz and 5.725–5.875 GHz) with high port isolation of 25 dB and 30 dB, respectively. A shared metal slot layer is designed to separate two feeding structures of the lower band and upper band for port isolation enhancement as well as saving space. Corner-truncated square slot and patch configurations have been designed to obtain CP modes. In the lower and upper MW-RFID bands, the relative impedance bandwidths are 12.2% and 5.7%, and the maximum realized gains are higher than 7.3 dBic. Moreover, two-element configurations have been combined for an RFID MIMO system that occupies a dimension of 119 mm × 119 mm × 12.9 mm. The MIMO antenna performance of envelope correlation coefficient (ECC) is lower than 0.03, and diversity gain is close to 10 dB.

U-Patch Antenna for RFID and Wireless Applications

2011 ◽  
Vol 324 ◽  
pp. 434-436
Author(s):  
R. Abi Saad ◽  
Zeina Melhem ◽  
Chadi Nader ◽  
Youssef Zaatar ◽  
Doumit Zaouk
Keyword(s):  
Radio Frequency Identification ◽  
Patch Antenna ◽  
Impedance Matching ◽  
Dual Band ◽  
Antenna Structure ◽  
Wireless Applications ◽  
Microstrip Patch ◽  
Additional Layer ◽  
Quarter Wavelength ◽  
Frequency Identification

in this paper, we propose a new multi-band patch antenna structure for embedded RFID (Radio Frequency Identification) readers and wireless communications. The proposed antenna is a dual band microstrip patch antenna using U-slot geometry. The operating frequencies of the proposed antenna are chosen as 2.4 and 0.9 (GHz), obtained by optimizing the physical dimensions of the U-slot. Several parameters have been investigated using Ansoft Designer software. The antenna is fed through a quarter wavelength transformer for impedance matching. An additional layer of alumina is added above the surface of the conductors to increase the performance of the antenna.

scholarly journals Dual-Band Monopole Antenna for RFID Applications

2019 ◽  
Vol 11 (2) ◽  
pp. 31 ◽  
Author(s):  
Naser Ojaroudi Parchin ◽  
Haleh Jahanbakhsh Basherlou ◽  
Raed Abd-Alhameed ◽  
James Noras
Keyword(s):  
Radio Frequency Identification ◽  
Monopole Antenna ◽  
Dual Band ◽  
Rfid Technology ◽  
Antenna Structure ◽  
The Past ◽  
Frequency Identification ◽  
Rfid Applications ◽  
Significant Attention ◽  
Good Agreement

Over the past decade, radio-frequency identification (RFID) technology has attracted significant attention and become very popular in different applications, such as identification, management, and monitoring. In this study, a dual-band microstrip-fed monopole antenna has been introduced for RFID applications. The antenna is designed to work at the frequency ranges of 2.2–2.6 GHz and 5.3–6.8 GHz, covering 2.4/5.8 GHz RFID operation bands. The antenna structure is like a modified F-shaped radiator. It is printed on an FR-4 dielectric with an overall size of 38 × 45 × 1.6 mm3. Fundamental characteristics of the antenna in terms of return loss, Smith Chart, phase, radiation pattern, and antenna gain are investigated and good results are obtained. Simulations have been carried out using computer simulation technology (CST) software. A prototype of the antenna was fabricated and its characteristics were measured. The measured results show good agreement with simulations. The structure of the antenna is planar, simple to design and fabricate, easy to integrate with RF circuit, and suitable for use in RFID systems.

RFID Loop Tags for Merchandise Identification Onboard Ships

2014 ◽  
Vol 1036 ◽  
pp. 969-974
Author(s):  
Daniela Deacu
Keyword(s):  
Radio Frequency Identification ◽  
Block Diagram ◽  
Simulated Data ◽  
Open Loop ◽  
Closed Loops ◽  
Passive Tags ◽  
Received Power ◽  
Resonance Frequencies ◽  
Frequency Identification ◽  
Good Agreement

Radio frequency identification (RFID) is one of the most actual techniques employed to control the circuit of merchandises, as an alternative to the classical barecode. RFID tags should be cheap and easy to reproduct on a multitude of dielectric supports. There are several types of RFID systems, depending on whether tag and/or reader are active or passive. For cost reasons, merchandise identification should use active reader and passive tag, as the latter might be manufactured on a cheap FR4 support or printed directly on paper, by using a conductive ink. Passive tags can be shaped as straight dipoles, meandered dipoles, or loops. When a small area is required, loops are more appropriated. Codes are made different one from another by using on the same tag antennas with different resonance frequencies. Another advantage of loops is that they can be placed one inside other, so the occupied area is even smaller compared to other multi-resonant tags. Firstly, a single loop is analyzed, in order to model the resonant behaviour, correlated to the loop geometry and size. Open and closed loops are studied; the lowest resonance frequency for a given loop length is achieved for the open loop. In that case, the loop is resonating as a dipole. Next, a tag with three concentric loops is investigated. Separately, a small loop is used on the tag, in order to couple the received power in a resistor. When the tag is close to the reader, the latter is triggered if power is absorbed simultaneously on the three expected frequencies. The proposed tag was simulated and manufactured. Results show a good agreement between measured and simulated data. Finally, a block diagram for the reader was proposed.

scholarly journals Time-Efficient Cloning Attacks Identification in Large-Scale RFID Systems

2017 ◽  
Vol 2017 ◽  
pp. 1-9 ◽  
Author(s):  
Ju-min Zhao ◽  
Ding Feng ◽  
Deng-ao Li ◽  
Wei Gong ◽  
Hao-xiang Liu ◽  
...  
Keyword(s):  
Radio Frequency ◽  
Radio Frequency Identification ◽  
Large Scale ◽  
Emerging Technology ◽  
Current Form ◽  
Rfid Systems ◽  
Frequency Identification ◽  
Rfid Applications

Radio Frequency Identification (RFID) is an emerging technology for electronic labeling of objects for the purpose of automatically identifying, categorizing, locating, and tracking the objects. But in their current form RFID systems are susceptible to cloning attacks that seriously threaten RFID applications but are hard to prevent. Existing protocols aimed at detecting whether there are cloning attacks in single-reader RFID systems. In this paper, we investigate the cloning attacks identification in the multireader scenario and first propose a time-efficient protocol, called the time-efficient Cloning Attacks Identification Protocol (CAIP) to identify all cloned tags in multireaders RFID systems. We evaluate the performance of CAIP through extensive simulations. The results show that CAIP can identify all the cloned tags in large-scale RFID systems fairly fast with required accuracy.

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