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PIER PIER B PIER C PIER M PIER Letters PIER Photonics
2023-07-29
Wideband Circular Polarized Fractal Antenna for RFID/WiMAX /WLAN Applications
By
Enchen Wang,

    Dr. Enchen Wang

    North China University of Technology

    China

    Homepage

Xiufeng Liu,

    Dr. Xiufeng Liu

    School of Information Engineering

    North China University of Technology

    China

    Homepage

Hu Chang

    Dr. Hu Chang

    Information Engineering College of North China University of Technology

    China

    Homepage

Progress In Electromagnetics Research Letters, Vol. 111, 111-120, 2023
doi:10.2528/PIERL23032601 | Google Scholar

Abstract
A novel wideband circularly polarized (CP) dipole antenna for RFID/WiMAX/WLAN applications is presented. A pair of crossed fan-shaped dipoles printed on both sides of the substrate are used as the primary radiating elements. The antenna achieves circular polarization by using a 90° phase shifted microstrip line between the dipoles. By changing the edge of fan dipoles into Minkowski fractal curve, miniaturization and wide bandwidth of the antenna can be realized. Besides, incorporating the U-slot into the fractal crossed dipoles can obtain a wider bandwidth. The test results show that the proposed antenna achieves a wide impedance bandwidth of 63.2% (1.9-3.7 GHz) for VSWR < 2 and a 3-dB axial ratio (AR) bandwidth of 42.9% (2.2-3.4 GHz). The maximum gain in the operating frequency band can reach 7 dBi. The proposed antenna has good radiation characteristics in both low and high frequencies, which makes it a candidate for applications of RFID, WLAN, WiMAX, and other communication systems.
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Citation
Enchen Wang, Xiufeng Liu, and Hu Chang, "Wideband Circular Polarized Fractal Antenna for RFID/WiMAX /WLAN Applications," Progress In Electromagnetics Research Letters, Vol. 111, 111-120, 2023.
doi:10.2528/PIERL23032601
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