Abstract
This paper presents a circularly polarized (CP) slot antenna array using substrate integrated waveguide (SIW)–feeding network at Q-band. To achieve CP radiation and high-gain performance simultaneously, a metallic radiating slanted cross slot is stacked atop an SIW coupling slot in the CP antenna element design. The fabricated CP antenna element features 14.6% (42.6–49.3 GHz) measured impedance bandwidth for |S11| ≤ −10 dB, 9.1% (42–46 GHz) measured 3-dB axial ratio (AR) bandwidth for AR ≤ 3, and 8.3 dBic measured peak gain, respectively. Then, a 1 × 8 antenna array is designed, fabricated, and measured. The measured results demonstrated that the impedance bandwidth and 3-dB AR bandwidth of the proposed 1 × 8 array are 14.8% (41.9–48.6 GHz) and 11% (43–48 GHz), respectively. The measured peak gain of the 1 × 8 array is 14.7 dBic at 44 GHz.
Abbreviations
- SIW:
-
Substrate-integrated waveguide
- CP:
-
Circularly polarized
- MMW:
-
millimeter-wave
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Acknowledgements
The authors would like to thank Dr. Zihang Qi of Beijing University of Posts and Telecommunications, for his valuable suggestions and help. The authors would also like to thank Dr. Teni Ger for his help in the antenna measurements.
Funding
This work was supported by Natural Science Foundation of Fujian Province under Grant No. 2020J05149 and also supported by Project JAT190298 through the Education Department of Fujian Province.
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Xiao, J., Ding, T., Luo, D. et al. Circularly Polarized Antenna Array Using Metallic Slanted Cross Slot for 5G MMW Applications. J Infrared Milli Terahz Waves 43, 165–180 (2022). https://doi.org/10.1007/s10762-021-00837-z
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DOI: https://doi.org/10.1007/s10762-021-00837-z