Dual Circularly Polarized Bow-Tie-Shaped Stacked Yagi-Uda Antenna Arrays for Internet of Things Applications
This paper presents the design and analysis of two dual circularly polarized stacked Yagi-Uda antenna arrays, referred to as Type A and Type B. The proposed Type A Yagi-Uda antenna array consists of four printed bow-tie-shaped elements arranged at different angles: a director, a reflector, and two o...
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IEEE
2025-01-01
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| Online Access: | https://ieeexplore.ieee.org/document/10896653/ |
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| author | Tae-Hyeon Kim Mohamed Elhefnawy Kyoung-Hun Kim Wang-Sang Lee |
| author_facet | Tae-Hyeon Kim Mohamed Elhefnawy Kyoung-Hun Kim Wang-Sang Lee |
| author_sort | Tae-Hyeon Kim |
| collection | DOAJ |
| description | This paper presents the design and analysis of two dual circularly polarized stacked Yagi-Uda antenna arrays, referred to as Type A and Type B. The proposed Type A Yagi-Uda antenna array consists of four printed bow-tie-shaped elements arranged at different angles: a director, a reflector, and two orthogonal driven elements. The driven elements are connected to coaxial cables via LC baluns. The Type B configuration introduces a complementary slotted bow-tie director element in place of the printed one, while the driven and reflector elements remain unchanged. Exciting the upper driven element generates right-hand circular polarization (RHCP), whereas left-hand circular polarization (LHCP) is achieved when the lower driven element is excited. Both proposed antenna arrays share the same dimensions of <inline-formula> <tex-math notation="LaTeX">$0.39\lambda _{0} \times 0.39\lambda _{0} \times 0.27\lambda _{0}$ </tex-math></inline-formula>, where <inline-formula> <tex-math notation="LaTeX">$\lambda _{0}$ </tex-math></inline-formula> represents the free-space wavelength at the operating frequency of 2.45 GHz. Measured results confirm that Type B outperforms Type A in several aspects. The Type B antenna array achieves a fractional impedance bandwidth of 8%, a 3-dB axial ratio (AR) bandwidth of 19.6%, and a peak gain of 4.49 dBic. In comparison, Type A exhibits a fractional impedance bandwidth of 2.45%, a 3-dB axial ratio bandwidth of 2.45%, and a peak gain of 3.5 dBic. These findings highlight the effectiveness of the complementary slotted bow-tie director in enhancing antenna performance, making Type B a promising candidate for Internet of Things (IoT) applications. |
| format | Article |
| id | doaj-art-078f34d017e34ebf9d04a100869ae64f |
| institution | OA Journals |
| issn | 2169-3536 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Access |
| spelling | doaj-art-078f34d017e34ebf9d04a100869ae64f2025-08-20T02:03:31ZengIEEEIEEE Access2169-35362025-01-0113340703408010.1109/ACCESS.2025.354390910896653Dual Circularly Polarized Bow-Tie-Shaped Stacked Yagi-Uda Antenna Arrays for Internet of Things ApplicationsTae-Hyeon Kim0Mohamed Elhefnawy1Kyoung-Hun Kim2Wang-Sang Lee3https://orcid.org/0000-0002-6414-2150Department of Electronic Engineering, Gyeongsang National University, Jinju, South KoreaDepartment of Electronic Engineering, Gyeongsang National University, Jinju, South KoreaDepartment of Electronic Engineering, Gyeongsang National University, Jinju, South KoreaDepartment of Electronic Engineering, Gyeongsang National University, Jinju, South KoreaThis paper presents the design and analysis of two dual circularly polarized stacked Yagi-Uda antenna arrays, referred to as Type A and Type B. The proposed Type A Yagi-Uda antenna array consists of four printed bow-tie-shaped elements arranged at different angles: a director, a reflector, and two orthogonal driven elements. The driven elements are connected to coaxial cables via LC baluns. The Type B configuration introduces a complementary slotted bow-tie director element in place of the printed one, while the driven and reflector elements remain unchanged. Exciting the upper driven element generates right-hand circular polarization (RHCP), whereas left-hand circular polarization (LHCP) is achieved when the lower driven element is excited. Both proposed antenna arrays share the same dimensions of <inline-formula> <tex-math notation="LaTeX">$0.39\lambda _{0} \times 0.39\lambda _{0} \times 0.27\lambda _{0}$ </tex-math></inline-formula>, where <inline-formula> <tex-math notation="LaTeX">$\lambda _{0}$ </tex-math></inline-formula> represents the free-space wavelength at the operating frequency of 2.45 GHz. Measured results confirm that Type B outperforms Type A in several aspects. The Type B antenna array achieves a fractional impedance bandwidth of 8%, a 3-dB axial ratio (AR) bandwidth of 19.6%, and a peak gain of 4.49 dBic. In comparison, Type A exhibits a fractional impedance bandwidth of 2.45%, a 3-dB axial ratio bandwidth of 2.45%, and a peak gain of 3.5 dBic. These findings highlight the effectiveness of the complementary slotted bow-tie director in enhancing antenna performance, making Type B a promising candidate for Internet of Things (IoT) applications.https://ieeexplore.ieee.org/document/10896653/Bow-tie antennaInternet of Things (IoT)LC balunleft-hand circular polarization (LHCP)right-hand circular polarization (RHCP)slotted bow-tie antenna |
| spellingShingle | Tae-Hyeon Kim Mohamed Elhefnawy Kyoung-Hun Kim Wang-Sang Lee Dual Circularly Polarized Bow-Tie-Shaped Stacked Yagi-Uda Antenna Arrays for Internet of Things Applications IEEE Access Bow-tie antenna Internet of Things (IoT) LC balun left-hand circular polarization (LHCP) right-hand circular polarization (RHCP) slotted bow-tie antenna |
| title | Dual Circularly Polarized Bow-Tie-Shaped Stacked Yagi-Uda Antenna Arrays for Internet of Things Applications |
| title_full | Dual Circularly Polarized Bow-Tie-Shaped Stacked Yagi-Uda Antenna Arrays for Internet of Things Applications |
| title_fullStr | Dual Circularly Polarized Bow-Tie-Shaped Stacked Yagi-Uda Antenna Arrays for Internet of Things Applications |
| title_full_unstemmed | Dual Circularly Polarized Bow-Tie-Shaped Stacked Yagi-Uda Antenna Arrays for Internet of Things Applications |
| title_short | Dual Circularly Polarized Bow-Tie-Shaped Stacked Yagi-Uda Antenna Arrays for Internet of Things Applications |
| title_sort | dual circularly polarized bow tie shaped stacked yagi uda antenna arrays for internet of things applications |
| topic | Bow-tie antenna Internet of Things (IoT) LC balun left-hand circular polarization (LHCP) right-hand circular polarization (RHCP) slotted bow-tie antenna |
| url | https://ieeexplore.ieee.org/document/10896653/ |
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