A Low-Profile Broadband Circularly Polarized Slot Antenna Loaded With Metasurface for UHF-RFID Readers
A low-profile broadband antenna with high-gain circularly polarized (CP) radiation is proposed for ultra-high frequency (UHF) radio frequency identification (RFID) readers. The design is a sequentially rotated <inline-formula> <tex-math notation="LaTeX">$2\times 2$ </tex-mat...
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IEEE
2025-01-01
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| Online Access: | https://ieeexplore.ieee.org/document/11015972/ |
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| author | Thi Ngoc Hien Doan Hai Dang Le van Son Hoang Khac Kiem Nguyen Son Xuat Ta |
| author_facet | Thi Ngoc Hien Doan Hai Dang Le van Son Hoang Khac Kiem Nguyen Son Xuat Ta |
| author_sort | Thi Ngoc Hien Doan |
| collection | DOAJ |
| description | A low-profile broadband antenna with high-gain circularly polarized (CP) radiation is proposed for ultra-high frequency (UHF) radio frequency identification (RFID) readers. The design is a sequentially rotated <inline-formula> <tex-math notation="LaTeX">$2\times 2$ </tex-math></inline-formula> CP slot array. Each slot element utilizes two 45°-rotated stubs to introduce proper structural asymmetry, and consequently, achieve CP radiation. The array is fed by a sequential-phase feeding network for improving CP radiation in terms of gain and 3-dB axial ratio (AR) bandwidth. For a broadside radiation, the slot array is backed by a ground plane (GND). A metasurface, which is composed of <inline-formula> <tex-math notation="LaTeX">$6\times 6$ </tex-math></inline-formula> periodic metallic plates, is inserted between the array and GND to allow a low profile with high efficiency. The final design with overall size of <inline-formula> <tex-math notation="LaTeX">$210\times 210\times 32.4$ </tex-math></inline-formula> mm3 (<inline-formula> <tex-math notation="LaTeX">$0.6\lambda \times 0.6\lambda \times 0.09\lambda $ </tex-math></inline-formula> at 0.86 GHz) has been fabricated and measured. The measurements result in a 10-dB return-loss bandwidth of <inline-formula> <tex-math notation="LaTeX">$0.81-0.96$ </tex-math></inline-formula> GHz, a 3-dB AR bandwidth of <inline-formula> <tex-math notation="LaTeX">$0.86-0.93$ </tex-math></inline-formula> GHz, and broadside right-hand CP radiation with the peak gain of 8.7 dBic. |
| format | Article |
| id | doaj-art-0746bb4541a840f7ad1085d7de199151 |
| institution | OA Journals |
| issn | 2169-3536 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Access |
| spelling | doaj-art-0746bb4541a840f7ad1085d7de1991512025-08-20T02:04:00ZengIEEEIEEE Access2169-35362025-01-0113930579306210.1109/ACCESS.2025.357411711015972A Low-Profile Broadband Circularly Polarized Slot Antenna Loaded With Metasurface for UHF-RFID ReadersThi Ngoc Hien Doan0https://orcid.org/0009-0003-0924-0684Hai Dang Le1https://orcid.org/0009-0004-4308-3317van Son Hoang2Khac Kiem Nguyen3https://orcid.org/0000-0002-6420-3531Son Xuat Ta4https://orcid.org/0000-0002-4246-0107School of Electrical and Electronic Engineering, Hanoi University of Science and Technology, Hanoi, VietnamSchool of Electrical and Electronic Engineering, Hanoi University of Science and Technology, Hanoi, VietnamSchool of Electrical and Electronic Engineering, Hanoi University of Science and Technology, Hanoi, VietnamSchool of Electrical and Electronic Engineering, Hanoi University of Science and Technology, Hanoi, VietnamSchool of Electrical and Electronic Engineering, Hanoi University of Science and Technology, Hanoi, VietnamA low-profile broadband antenna with high-gain circularly polarized (CP) radiation is proposed for ultra-high frequency (UHF) radio frequency identification (RFID) readers. The design is a sequentially rotated <inline-formula> <tex-math notation="LaTeX">$2\times 2$ </tex-math></inline-formula> CP slot array. Each slot element utilizes two 45°-rotated stubs to introduce proper structural asymmetry, and consequently, achieve CP radiation. The array is fed by a sequential-phase feeding network for improving CP radiation in terms of gain and 3-dB axial ratio (AR) bandwidth. For a broadside radiation, the slot array is backed by a ground plane (GND). A metasurface, which is composed of <inline-formula> <tex-math notation="LaTeX">$6\times 6$ </tex-math></inline-formula> periodic metallic plates, is inserted between the array and GND to allow a low profile with high efficiency. The final design with overall size of <inline-formula> <tex-math notation="LaTeX">$210\times 210\times 32.4$ </tex-math></inline-formula> mm3 (<inline-formula> <tex-math notation="LaTeX">$0.6\lambda \times 0.6\lambda \times 0.09\lambda $ </tex-math></inline-formula> at 0.86 GHz) has been fabricated and measured. The measurements result in a 10-dB return-loss bandwidth of <inline-formula> <tex-math notation="LaTeX">$0.81-0.96$ </tex-math></inline-formula> GHz, a 3-dB AR bandwidth of <inline-formula> <tex-math notation="LaTeX">$0.86-0.93$ </tex-math></inline-formula> GHz, and broadside right-hand CP radiation with the peak gain of 8.7 dBic.https://ieeexplore.ieee.org/document/11015972/RFIDreaderbroadbandcircular polarizationmetasurfaceantenna |
| spellingShingle | Thi Ngoc Hien Doan Hai Dang Le van Son Hoang Khac Kiem Nguyen Son Xuat Ta A Low-Profile Broadband Circularly Polarized Slot Antenna Loaded With Metasurface for UHF-RFID Readers IEEE Access RFID reader broadband circular polarization metasurface antenna |
| title | A Low-Profile Broadband Circularly Polarized Slot Antenna Loaded With Metasurface for UHF-RFID Readers |
| title_full | A Low-Profile Broadband Circularly Polarized Slot Antenna Loaded With Metasurface for UHF-RFID Readers |
| title_fullStr | A Low-Profile Broadband Circularly Polarized Slot Antenna Loaded With Metasurface for UHF-RFID Readers |
| title_full_unstemmed | A Low-Profile Broadband Circularly Polarized Slot Antenna Loaded With Metasurface for UHF-RFID Readers |
| title_short | A Low-Profile Broadband Circularly Polarized Slot Antenna Loaded With Metasurface for UHF-RFID Readers |
| title_sort | low profile broadband circularly polarized slot antenna loaded with metasurface for uhf rfid readers |
| topic | RFID reader broadband circular polarization metasurface antenna |
| url | https://ieeexplore.ieee.org/document/11015972/ |
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