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Unidirectional suspended fractal antenna for SHF RFID reader
Author(s)
Janpangngern, Pisit
Date Issued
November 3, 2017
Type
Conference Paper
Abstract
This paper presents the RF identification (RFID) reader antenna design for the frequency band of 2.4-2.5 GHz corresponding to the standard of universal SHF RFID. A suspended fractal antenna is introduced in this work. The antenna structure consists of two layers. The bottom plate is suspended above a ground plane. The antenna has a single feed by a tapered down feeding strip. The top layer consists of four identical fractal radiating plates and each plate is connected to the bottom plate by a vertical strip. A fractal technique is presented to reduce the antenna size. The total size of reader antenna is 130 mm × 110 mm fabricated by a copper with the thickness 6 mm. The measured results are shown that the proposed antenna achieves the of -10 dB, the gain at boresight direction is 10.33 dBi, considering at 2.45 GHz, VSWR < 2 of 2.365-2.530 GHz or 6.74 %, with unidirectional pattern. Therefore, the proposed antenna is useful for universal SHF RFID applications worldwide at the SHF band of 2.40-2.5 GHz.
Citation
Ecti Con 2017 2017 14th International Conference on Electrical Engineering Electronics Computer Telecommunications and Information Technology, 680-682, 2017