Smart Antennas for Automatic Radio Frequency Identification Readers

2009 ◽  
pp. 449-473 ◽  
Author(s):  
Nemai Chandra Karmakar
Keyword(s):  
Radio Frequency ◽  
Frequency Band ◽  
Radio Frequency Identification ◽  
Phased Array ◽  
Smart Antennas ◽  
Phased Array Antenna ◽  
Location Finding ◽  
Input Multiple Output ◽  
Frequency Identification ◽  
Rfid Readers

Various smart antennas developed for automatic radio frequency identification (RFID) readers are presented. The main smart antennas types of RFID readers are switched beam, phased array, adaptive beamfsorming and multiple input multiple output (MIMO) antennas. New development in the millimeter wave frequency band?60 GHz and above? exploits micro-electromechanical system (MEMS) devices and nano-components. Realizing the important of RFID applications in the 900 MHz frequency band, a 3×2-element planar phased array antenna has been designed in a compact package at Monash University. The antenna covers 860-960 GHz frequency band with more than 10 dB input return loss, 12 dBi broadside gain and up to 40° elevation beam scanning with a 4-bit reflection type phase shifter array. Once implemented in the mass market, RFID smart antennas will contribute tremendously in the areas of RFID tag reading rates, collision mitigation, location finding of items and capacity improvement of the RFID system.

Smart Antennas for Automatic Radio Frequency Identification Readers

2010 ◽  
pp. 648-677
Author(s):  
Nemai Chandra Karmakar
Keyword(s):  
Radio Frequency ◽  
Frequency Band ◽  
Radio Frequency Identification ◽  
Phased Array ◽  
Smart Antennas ◽  
Phased Array Antenna ◽  
Location Finding ◽  
Input Multiple Output ◽  
Frequency Identification ◽  
Rfid Readers

Various smart antennas developed for automatic radio frequency identification (RFID) readers are presented. The main smart antennas types of RFID readers are switched beam, phased array, adaptive beams forming and multiple input multiple output (MIMO) antennas. New development in the millimeter wave frequency band?60 GHz and above? exploits micro-electromechanical system (MEMS) devices and nano-components. Realizing the important of RFID applications in the 900 MHz frequency band, a 3×2-element planar phased array antenna has been designed in a compact package at Monash University. The antenna covers 860-960 GHz frequency band with more than 10 dB input return loss, 12 dBi broadside gain and up to 40° elevation beam scanning with a 4-bit reflection type phase shifter array. Once implemented in the mass market, RFID smart antennas will contribute tremendously in the areas of RFID tag reading rates, collision mitigation, location finding of items and capacity improvement of the RFID system.

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.

scholarly journals Elegant System for Library Management using RFID

2018 ◽  
Vol 7 (3.1) ◽  
pp. 133
Author(s):  
D Pradeepa ◽  
R Valarmady ◽  
S G Rajasekar
Keyword(s):  
Radio Frequency ◽  
Radio Frequency Identification ◽  
Rfid Tags ◽  
Library Management ◽  
Frequency Identification ◽  
Radio Frequency Waves ◽  
Rfid Readers

Radio Frequency Identification (RFID) implies a system that exchanges the data remotely, utilizing radio frequency waves. It is programmed identification innovation. This paper is about RFID based system for library management that permits quick exchange stream and will make simple to deal with the exercises like issue and return of books from the library absent much manual intercession. This system depends on RFID readers and detached RFID tags that can store the data electronically which can be perused by the RFID readers. This system will influence clients to issue to and return of books through RFID tags simple and furthermore ascertain the comparing fine connected with the timeframe the nonappearance of the book from the library.  

Radio Frequency Identification Technology and Its Security Concerns in the Manufacturing Industry

2020 ◽  
pp. 78-95
Author(s):  
Kamalendu Pal
Keyword(s):  
Radio Frequency ◽  
Customer Service ◽  
Radio Frequency Identification ◽  
Manufacturing Industry ◽  
Low Cost ◽  
Security And Privacy ◽  
Business Operations ◽  
Frequency Identification ◽  
Privacy Risks ◽  
Rfid Readers

The advent of Radio Frequency Identification (RFID) technique, low-cost wireless sensor devices, and web-based technologies are ushering new ways to take control of the plethora of data created by the Internet of Things (IoT) approach has gained popularity in the modern manufacturing industry. This mechanism provides an opportunity of remotely storing and retrieving data from RFID-tags. Products labelled with such tags can be scanned efficiently using RFID-readers that do not require line-of-sight. This type of identification and access to information on tags are used by manufacturing business operations, can lead to improving logistics, and better customer service. However, the widespread use of RFID technology also introduces serious security and privacy risks since the information stored in tags can easily be retrieved by hidden RFID-readers, eventually leading to the violation of genuine business operation privacy. This chapter discusses the open research challenges of RFID applications in the manufacturing supply chain operations.

Employing Ultrahigh-Frequency RFID Technology on Deer Farm Managment

2015 ◽  
Author(s):  
Liang Hsiao-Mei ◽  
Wang Chih-Hwa ◽  
Shann-Ren ◽  
Kang ◽  
Hsuuw Yan-Der ◽  
...  
Keyword(s):  
Radio Frequency ◽  
Radio Frequency Identification ◽  
Farm Management ◽  
Ultrahigh Frequency ◽  
Personal Digital Assistants ◽  
Rfid Technology ◽  
Uhf Rfid ◽  
Frequency Range ◽  
Frequency Identification ◽  
Rfid Readers

This project uses ultrahigh-frequency (UHF) ear tags and readers with a readable range of 3 to 5 m. Forty stags were tagged with radio-frequency identification (RFID) ear tags and allocated into 20 pens. When deer with RFID ear tags walked through the aisle, handheld RFID readers, used as personal digital assistants (PDAs), and stationary RFID readers in frequency range received signals from the tags, and individual deer tag data were transmitted immediately and completely through wireless PDAs to a computer. The inputted data were sent to the deer-farm management system to be collated and organized. Farmers obtained individual deer data without approaching the deer, which decreased the risk of the deer attacking. Employing UHF-RFID technology integrated with software contributes to enhancing the efficiency of deer identification and farm management.

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