Variable Staircase Ground Structure Circularly Polarized Microstrip Antenna with an Irregular Slot UHF RFID Reader

Volume 7 Issue 4 June - August 2017

Research Paper

Variable Staircase Ground Structure Circularly Polarized Microstrip Antenna with an Irregular Slot UHF RFID Reader

Avaneesh Kumar Verma*, Deepam Dubey**

* Department of Electronics Design and Technology, NIELIT, Gorakhpur, India.

** Department of Electronics Design and Technology, NIELIT, Gorakhpur, India.

Verma, A.K., and Dubey, D. (2017). Variable Staircase Ground Structure Circularly Polarized Microstrip Antenna with an Irregular Slot UHF RFID Reader. i-manager’s Journal on Electronics Engineering, 7(4), 41-44. https://doi.org/10.26634/jele.7.4.13688

Abstract

A compact UHF range RFID antenna with Circular Polarization (CP), which is proposed in this paper consists of stair shaped edge with irregular slots on one side and L-shaped feed line on the other. The L-shaped structure improves the Circular Polarization of antenna and provides CP mode at 2.68 GHz under UHF frequency range which is suitable for RFID applications. This antenna also provides bandwidth for RFID reader with -10 dB return loss (reflection coefficient) and have 3 dB axial ratio (AR<3 dB) and impedance bandwidth (VSWR < 2) in the operating frequency band.