Reduced mutual coupling in MIMO vivaldi antenna using orthogonal placement
In this work, we propose a high-isolation, wideband Vivaldi MIMO antenna that operates in the X-band. The antenna is proposed to be used in wireless systems like radar and satellites. The structure comprises two antenna elements spaced 5 mm (0.17 λ₀) apart and oriented perpendicularly to one another...
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| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-09-01
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| Series: | Results in Engineering |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2590123025029275 |
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| Summary: | In this work, we propose a high-isolation, wideband Vivaldi MIMO antenna that operates in the X-band. The antenna is proposed to be used in wireless systems like radar and satellites. The structure comprises two antenna elements spaced 5 mm (0.17 λ₀) apart and oriented perpendicularly to one another, where λ₀ is calculated at 10.25 GHz. With S11 ≤ -10 dB, the antenna operates in the 8 GHz to 12 GHz frequency band. A unique arrangement that places one antenna perpendicular to the other's taper zone successfully minimizes mutual interaction and guarantees an omnidirectional emission pattern without the need of additional decoupling structures. The proposed antenna prototype was constructed, and experimental data were used to confirm the modeling results. The measured findings show that, throughout the whole X-band, the isolation between the two antenna elements is at least -35 dB. Furthermore, the proposed design preserves an omnidirectional radiation pattern validated through both simulation and measurement. With possible uses in radar, millimeter-wave, ultra-wideband, and other communication networks, this work provides a workable way to achieve high isolation. |
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| ISSN: | 2590-1230 |