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This paper presents the implementation of multi-beam antenna for the effective coverage of RFID in the near-zone. The 2-D planar antenna array may radiate focused energy along the vertical dimension while in the meantime providing multiple focused spots along the horizontal dimensions for multiple coverages or switching the coverage in terms of time-sharing. Two systems have been implemented and presented...
Nowadays, in case of an emergency, and because of the more complicated interiors of buildings, people may not be able to easily find a safe escape route within limited time. An immediately available evacuation guide can improve safety in public buildings. In this research paper, we propose an intelligent guidance system that is a combination of image recognition and Digital Signage for conducting...
This paper presents a new RFID reader antenna design with its radiation beam switchable to track the tags in in the near-zone of array aperture. The antenna is realized by using microstrip antenna array with a beam-forming network based on Butler matrix. The radiation of array is focused in the near zone to avoid interferences resulted from the scatterers in the vicinity of antenna. The design approach,...
An antenna subsystem is presented for RFID reader applications at 2.45 GHz in the near-zone tag detection. The subsystem is programmable to adaptively steer the radiation beam from one spot to another inside the target zone, and allows the RFID to achieve a better signal reception by changing the beam patterns along the horizontal cut. The created beams have narrow spots, and may potentially reduce...
A Virtual Signal Location System (VSLS) is developed to overcome some drawbacks of LANDMARC, a promising indoor-sensing system which implements RFID technology. The concept of VSLS is based on the additional virtual signal tags as well as the characteristics of the normal distribution of signal strength, analysis of sampling rate and equalization to decrease signal intensity error. Some comparisons...
Application of automated material handling system (AMHS) to the semiconductor manufacturing factories is one of the most important steps in the automation process of semiconductor business. All cassettes in the vehicle of the transportation facility can send their positioning information through this system. Nevertheless, some positioning information may still be interfered or get lost if there is...
Radio frequency identification (RFID) technology has become more sophisticated in recent years and is being developed rapidly for a variety of applications. The problem of eliminating redundant readers has been reduced to the minimum cover problem and proved to be NP-hard. In this paper, a density-based redundant reader elimination algorithm (DRRE) is presented; DRRE eliminates the redundant readers...
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