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PIER PIER B PIER C PIER M PIER Letters PIER Photonics
2016-09-21
Broadband Circularly Polarized Slotted Patch Antenna Loaded with Short Pins
By
Xiangdong An,

    Dr. Xiangdong An

    National Laboratory of Antenna and Microwave Technology

    Xidian University

    China

    Homepage

Jianjun Wu,

    Dr. Jianjun Wu

    National Laboratory of Science and Technology on Antennas and Microwaves

    Xidian University

    China

    Homepage

Ying-Zeng Yin

    Professor Ying-Zeng Yin

    Xidian University

    China

    Homepage

Progress In Electromagnetics Research Letters, Vol. 62, 97-103, 2016
doi:10.2528/PIERL16052408 | Google Scholar

Abstract
In this letter, a design for broadband circularly slotted patch antenna fabricated on a single-layered printed circuit board (PCB) with unidirectional radiation is described. It is fed by a simple center-fed feeding scheme. Unlike conventional slotted patch antennas, the proposed antenna is loaded with four short pins such that both matching and axial-ratio (AR) bandwidths are improved. In addition to realize the CP radiation at higher frequencies, a cross slot with different arm lengths, which is cut from the center-fed patch is used. Then, the proposed antenna operates as magnetic dipoles to generate circular polarization at low frequencies after four short pins are added to connect the patch to the ground. Thus, by combining the two modes, bandwidths of 30.2% (1.83-2.48 GHz) for |S11| < -10 dB and 21.2% (1.98-2.45 GHz) for axial ratio (AR) < 3 dB around the center frequency of 2.15 GHz are measured. Moreover, stable gain of over 8 dBic and good radiation patterns are also observed across the operating band.
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Citation
Xiangdong An, Jianjun Wu, and Ying-Zeng Yin, "Broadband Circularly Polarized Slotted Patch Antenna Loaded with Short Pins," Progress In Electromagnetics Research Letters, Vol. 62, 97-103, 2016.
doi:10.2528/PIERL16052408
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