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Design of a miniaturized geodetic-grade GNSS reference antenna covering Bs band

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Abstract

We present the design of a miniaturized multiple-band geodetic-grade GNSS reference antenna covering the Bs band of the Chinese Beidou System. The proposed antenna combines a spiral antenna operating in the L band (1160–1610 MHz) and a four-point-fed patch antenna operating in the Bs band (2477–2507 MHz). A miniaturized vertical choke ring with a serrated cavity is applied to mitigate multipath signals functioning in both the L and Bs bands. The modified choke ring ground plane ensures the geodetic-grade multipath suppression capability of the antenna, and its far smaller size compared with a conventional choke ring ground results in a relative gain increase at low elevation angles. The proposed antenna features a millimeter-grade phase center variation, an axial ratio of less than 4 dB above an elevation of 10°, and front back ratios of 30 dB and 25 dB in the L band and Bs band, respectively. The gain roll-off is reduced by approximately 3 dB compared to the conventional choke ring antenna, which means better reception of satellite signals. The volume of the proposed antenna is one-tenth that of the state-of-the-art 3-dimensional choke ring antenna. All these results show that the proposed antenna is an appropriate choice for geodetic-grade GNSS reference antennas.

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Acknowledgements

This work was supported by the Key Basic Research Projects of Shenzhen Science and Technology Commission (Grant No. 2020N259) and the Shenzhen Science and Technology Program (Grant Nos. GXWD20201231165807008, 20200830225317001).

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Authors and Affiliations

  1. Sun Yat-Sen University Shenzhen Campus, Shenzhen, 518107, China

    Du Li, Bingrui Yu, Qixiang Fu & Jiangwei Sui

  2. National University of Defense Technology, Changsha, 410139, China

    Zhenshi Zhang

  3. Sun Yat-Sen University, Guangzhou, China

    **angwei Zhu & Jiangwei Sui

Authors
  1. Du Li
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  2. Zhenshi Zhang
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  3. Bingrui Yu
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  4. Qixiang Fu
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  5. **angwei Zhu
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  6. Jiangwei Sui
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Contributions

Jiangwei Sui inspired the idea of the design and reviewed the manuscript. Du Li conducted most of the simulations and analysis. Bingrui Yu designed the PCB drawings, and Qixiang Fu designed the structural processing drawing of the modified choke ring. Zhenshi Zhang completed the antenna testing. Du Li and Zhengshi Zhang wrote the main manuscript text.

Corresponding author

Correspondence to Jiangwei Sui.

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Li, D., Zhang, Z., Yu, B. et al. Design of a miniaturized geodetic-grade GNSS reference antenna covering Bs band. GPS Solut 27, 180 (2023). https://doi.org/10.1007/s10291-023-01521-6

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