Broadband circularly polarized Z‐shaped dipole antenna with parasitic strips |
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| Authors: | Wei Hu Zhao‐Yang Tang Peng Fei Ying‐Zeng Yin |
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| Affiliation: | 1. National Laboratory of Science and Technology on Antennas and Microwaves, Xidian University, Xi'an, Shaanxi, China;2. Collaborative Innovation Center of Information Sensing and Understanding, Xidian University, Xi'an, Shaanxi, China;3. Science and Technology on Metrology and Calibration Laboratory, Beijing Institute of Radio Metrology and Measurement, Beijing, China |
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| Abstract: | A Z‐shaped dipole antenna with parasitic strips is proposed for wideband and unidirectional circular polarization operation in this article. The dipole arms are bent into L‐shape for circular polarization, and printed balun is used to achieve good impedance matching. To further extend the axial ratio bandwidth, two parasitic strips are employed to introduce an additional band of circularly polarized operation at the high frequency. Measured results demonstrate that the proposed antenna has a 10‐dB impedance bandwidth of 63.3% (1.64‐3.16 GHz) and a 3‐dB axial ratio bandwidth of 51.1% (1.72‐2.9 GHz). Stable radiation patterns with gain around 9 dBic along +z‐axis are also observed. |
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| Keywords: | broadband circularly polarized parasitic strips Z‐shaped dipole antenna |
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