Abstract
This paper is focused on the development of wideband microstrip patch antenna for Ultra High Frequency (UHF) Radio Frequency Identification (RFID) Reader application. This RFID reader can read information from tags and allow the detection of objects. Usually, the RFID Reader has narrow bandwidth and can be used in certain country only. Therefore, this proposed antenna is designed with wideband frequency, low cost and simple structure which can be used worldwide. The operating frequency range for worldwide operation is between 860 MHz to 960 MHz. The structure of the antenna is composed of a Z-shaped feedline on the upper side of FR-4 substrate and a slotted patch on the lower side. The cutting slot method has been used in this antenna design in order to improve the antenna bandwidth as well as the size of the antenna. This RFID Reader was designed and simulated using CST Microwave Studio. The overall size of the proposed UHF RFID antenna is 100 × 100 × 1.6 mm3. The proposed RFID Reader antenna has the reflection coefficient (S11) below than -10 dB and has wideband frequency from 845 MHz to 1.09 GHz in simulation result. The measured and simulated result was compared in order to analyse the performance of the designed antenna. Other antenna parameters such as radiation pattern, bandwidth and gain has also been evaluated and analysed.
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