In this project patch antenna has been used for Radio Frequency Identification (RFID) applications. Due to the advancement in the field of wireless communications day by day, RFID is the most attractive technology being used as an identification technology and is far better than other sources of identification and tracking i.e. Bar code technology. Different frequency bands are assigned for RFID antenna. But in this project work has been made in Microwave band ranging from (2.400- 2.483) GHz and (5.7250- 5.8750) GHz due to a number of applications and due to the higher transfer rate. In order to design slotted dual band patch for RFID 2.45GHz and 5.800 Ghz applications, a 1.58 mm thicker RT/duroid-5880 is selected for substrate material having a relative permittivity and loss tangent of Ɛr=2.2 and δ=0.0009 respectively. To achieve dual band response different techniques can be adopted. First a conventional patch for 2.45GHz has been designed and then with the help of slotting techniques another frequency band was achieved that was radiating at 5.8 GHz. The dual band frequency of the antenna has been achieved by introducing the slot in the upper most layer patch with coaxial feed. The gain, efficiency and bandwidth of the antenna at (2.45 and 5.80) GHz are {6.661 dB, 89 %, 36 MHz} and {6.661 dB, 97 % and 341MHz}, respectively. The antenna can be potentially use for RFID and WLAN applications. All the simulations are carried out using CST MWS. The prototype has been fabricated to validate the results.
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Researcher own contribution – May 2019.
