Abstract
A dual-band circular polarized antenna with broad bandwidth is proposed. Two circular grooves with different radii are carved on the ground to generate two frequency bands. Two rectangular slots are engraved on the outside of the circular groove. By adjusting the length of the two slots, this antenna can radiate right-handed circularly polarized (RHCP) waves at two frequency bands, which can cover GPS L5 (1.176 GHz), L2 (1.227 GHz), L1 (1.575 GHz), BDS, GALILEO, and GLONASS bands. The measured −10 dB bandwidth is 46.3 % (1.13–1.81 GHz) and 3 dB axial ratio bandwidths are 15.6 % (1.11–1.30 GHz) and 17.8 % (1.38–1.65 GHz). The measured gains are 2.51 dBi and 2.67 dBi at 1.2 GHz and 1.56 GHz, respectively.
Funding source: the open project of the state key laboratory of complex electromagnetic environment effects on electronics and information system
Award Identifier / Grant number: CEMEE2022Z0201B
Funding source: Natural Science Research Project for Universities in Anhui Province
Award Identifier / Grant number: KJ2021A0101
Funding source: University Synergy Innovation Program of Anhui Province
Award Identifier / Grant number: GXXT-2021-027
Funding source: National Natural Science Foundation of China
Award Identifier / Grant number: 61871003
Award Identifier / Grant number: 62101005
Funding source: Natural Science Foundation of Anhui Province
Award Identifier / Grant number: 2108085QF256
Award Identifier / Grant number: 2308085Y02
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Research ethics: The research described in this article adheres to all applicable ethical guidelines and was conducted in accordance with the principles of the School of Physics and Electronic Information, Anhui Normal University.
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Author contributions: The authors have accepted responsibility for the entire content of this manuscript and approved its submission.
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Competing interests: The authors state no conflict of interest.
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Research funding: This work is funded in part by, the Natural Science Foundation of Anhui province (2308085Y02, 2108085QF256), the University Synergy Innovation Program of Anhui Province (GXXT-2021-027), the National Natural Science Foundation of China (61871003, 62101005), the open project of the state key laboratory of complex electromagnetic environment effects on electronics and information system (CEMEE2022Z0201B) and Natural Science Research Project for Universities in Anhui Province (KJ2021A0101).
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Data availability: The raw data can be obtained on request from the corresponding author.
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