Single-Feed Circularly Polarized Super Realized Gain Antenna
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arXiv
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| Format: | Preprint |
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2026
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| author | Psychogiou, Georgia Lynch, Donal P. Daskalakis, Spyridon N. Tentzeris, Manos M. Goussetis, George Asimonis, Stylianos D. |
| author_facet | Psychogiou, Georgia Lynch, Donal P. Daskalakis, Spyridon N. Tentzeris, Manos M. Goussetis, George Asimonis, Stylianos D. |
| contents | This paper presents a super realized gain, circularly polarized strip-crossed dipole antenna operating at 3.5 GHz. Superdirective behavior is achieved by leveraging strong inter-element mutual coupling through careful adjustment of the strip dimensions. The antenna features a single driven element, with the other element passively loaded with a reactive impedance. The structure is optimized to maximize left-hand circularly polarized (LHCP) realized gain, ensuring high polarization purity and good impedance matching. The optimized design exhibits a 50 $Ω$ impedance bandwidth of 3.29 - 4.17 GHz (23.75%) and an axial-ratio bandwidth of 3.43 - 3.57 GHz (4%). At 3.5 GHz, the antenna achieves a peak realized gain of 6.1 dB ($ka \approx 1.65$), with an axial ratio of 1.4 dB. These results demonstrate that circular polarization and superdirectivity can be simultaneously realized in a geometrically simple, low-profile ($0.15λ$) antenna, rendering it suitable for integration into compact sub-6~GHz wireless and sensing platforms. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2601_10292 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Single-Feed Circularly Polarized Super Realized Gain Antenna Psychogiou, Georgia Lynch, Donal P. Daskalakis, Spyridon N. Tentzeris, Manos M. Goussetis, George Asimonis, Stylianos D. Systems and Control This paper presents a super realized gain, circularly polarized strip-crossed dipole antenna operating at 3.5 GHz. Superdirective behavior is achieved by leveraging strong inter-element mutual coupling through careful adjustment of the strip dimensions. The antenna features a single driven element, with the other element passively loaded with a reactive impedance. The structure is optimized to maximize left-hand circularly polarized (LHCP) realized gain, ensuring high polarization purity and good impedance matching. The optimized design exhibits a 50 $Ω$ impedance bandwidth of 3.29 - 4.17 GHz (23.75%) and an axial-ratio bandwidth of 3.43 - 3.57 GHz (4%). At 3.5 GHz, the antenna achieves a peak realized gain of 6.1 dB ($ka \approx 1.65$), with an axial ratio of 1.4 dB. These results demonstrate that circular polarization and superdirectivity can be simultaneously realized in a geometrically simple, low-profile ($0.15λ$) antenna, rendering it suitable for integration into compact sub-6~GHz wireless and sensing platforms. |
| title | Single-Feed Circularly Polarized Super Realized Gain Antenna |
| topic | Systems and Control |
| url | https://arxiv.org/abs/2601.10292 |