Title :
A compact W-shaped 2.45 GHz RFID tag antenna design for UHF RFID applications
Author :
Sarkar, Mohanchur ; ul Hoque, Md Reshad ; Hossain, Md Aynal ; Alam, Md Shamsul
Author_Institution :
Dept. of Electron. & Commun. Eng., Khulna Univ. of Eng. & Technol., Khulna, Bangladesh
Abstract :
This paper represents design, analysis & investigation of an radiator for UHF RFID applications. This antenna covered the frequency spectrum 2392.86-2457.14MHz with bandwidth 14.28MHz which is sufficient for RFID tag applications. We have designed as well as simulated this antenna using Numerical Electromagnetic Code (NEC) antenna modeling software package which is based on the method of moments solution and after simulation we have got SWR exactly 1.097 having reflection coefficient -26.68 without filtering and after passing through a low-pass L-network the SWR value is sharply 1.00054 with reflection coefficient -71.386 at 2.45 GHz band. The total antenna gain is excellent and it is approximately 22.3 dBi. We have achieved the decent impedance that is 48.36-j4.95 ohm before filtering and 49.99-j0.029 ohm after filtering. Afterward we have fabricated this designed antenna on a low-cost printed circuit board with ground plane including dielectric constant 4.4 & thickness of the metal 1.58mm. The efficiency of the proposed antenna is 99.96%. The measurement shows that the SWR value is 1.05404 at 0 dB attenuation.
Keywords :
UHF antennas; UHF filters; antenna radiation patterns; low-pass filters; method of moments; radiofrequency identification; NEC antenna modeling software package; SWR; UHF RFID application; bandwidth 14.28 MHz; compact W-shaped RFID tag antenna design; dielectric constant; frequency 2.45 GHz; frequency 2392.86 MHz to 2457.14 MHz; frequency spectrum; ground plane; low-cost printed circuit board; low-pass L-network; method of moments; numerical electromagnetic code antenna fabrication; radiator analysis; radio frequency identification; reflection coefficient; size 1.58 mm; standing wave ratio; Antenna measurements; Antenna radiation patterns; Bandwidth; Filtering; Impedance; Radiofrequency identification; Electrically Small Antenna (ESA); Low-pass L-network; Numerical Electromagnetic Code (NEC); RFID Tag Antenna; Standing Wave Ratio (SWR);
Conference_Titel :
Computer and Information Technology (ICCIT), 2013 16th International Conference on
Conference_Location :
Khulna
DOI :
10.1109/ICCITechn.2014.6997331
