Miniaturization of Circularly Polarized Microstrip Antenna for RFID Portable Reader at 900 MHz Band
نویسندگان
چکیده
منابع مشابه
Circularly Polarized Broadband RFID Microstrip Tag Antenna
In recent years, the application of radio frequency identification (RFID) operating in the ultra-high frequency (UHF) band (860-960MHz) are expanding exponentially, due to the advantages such as long reading distance, high data transfer rate, and small tag size. So the design of a CP tag antenna with broadband characteristic is presently one of the most challenging topics. This project presents...
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A compact single-feed dual-band circularly polarized (CP) microstrip antenna is evaluated numerically and experimentally. The dual-band performances with small frequency ratio (about 1 : 1.1) are achieved by a circular patch and a narrow annular-ring, which have small difference in radius. The CP characteristics are achieved by an unequal cross-slot embedded in the circular patch and two orthog...
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In very high frequency performances such as spacecraft, satellite & missile applications where the size, weight, cost, performance, ease of installation & aerodynamic profile are constraints microstrip antennas (MA) are used to meet these requirements. In spite of limitations such as small bandwidth, low gain and low power handling capability, microstrip antenna offers good performance over oth...
متن کاملCircularly Polarized Tag Antenna for UHF RFID
Design of a circularly polarized tag antenna for UHF RFID applications is discussed and a planar tag antenna, based on series connected loop topology is designed. Simulation based design process for axial ratio optimization is discussed and the simulation and measurement results for the proposed tag antenna are presented.
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In modern wireless communication systems, small circularly polarized microstrip antennas with good performance are desirable mainly at low microwave frequencies. The radio frequency identification (RFID) systems in the ultra-high frequency (UHF) band have gained much interest in many services [Finkenzeller2004]. The reader antenna is one of the important components in the RFID reader system and...
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ژورنال
عنوان ژورنال: The Journal of Korean Institute of Electromagnetic Engineering and Science
سال: 2008
ISSN: 1226-3133
DOI: 10.5515/kjkiees.2008.19.4.411