Four-Element Ring Framed Floral MIMO Antenna With High Isolation for UWB Applications
International Journal of Antennas and Propagation, cilt.2026, sa.1, 2026 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 2026 Sayı: 1
- Basım Tarihi: 2026
- Doi Numarası: 10.1155/ijap/7002182
- Dergi Adı: International Journal of Antennas and Propagation
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Aerospace Database, Applied Science & Technology Source, Compendex, INSPEC, Directory of Open Access Journals, Middle East & Africa Database (ProQuest), Engineering Source (EBSCO), Technology Collection (ProQuest)
- Anahtar Kelimeler: gain, isolation, MIMO, polarization diversity, UWB
- İstanbul Medipol Üniversitesi Adresli: Evet
Özet
A compact four-element UWB MIMO antenna system with pattern and polarization diversity is proposed to achieve wide impedance bandwidth and improved multiport performance. The antenna is designed on an FR4 substrate with a thickness of 1.575 mm and a relative permittivity of 4.4, while the overall size of the proposed structure is 48 × 48 mm2. The developed MIMO configuration covers a wide operating band from 2.5 to 20 GHz, corresponding to a fractional bandwidth of 146%. The mutual coupling between antenna elements is effectively controlled, and the measured isolation is better than 15 dB throughout the operating range. The proposed antenna also provides acceptable radiation characteristics, with efficiency varying from 50% to 84% and a peak gain of 4.8 dBi. The measured results of the fabricated prototype are in good agreement with the simulated data, confirming the validity of the design approach. Moreover, the evaluated MIMO performance parameters, such as envelope correlation coefficient and diversity gain, remain within standard acceptable limits. Compared with recently reported UWB MIMO antennas, the proposed design combines a compact four-port polarization-diversity configuration with a loop-fed clover-shaped radiator to achieve an ultra-wide operating bandwidth of 2.9–20 GHz while maintaining stable radiation characteristics, low mutual coupling, and excellent diversity performance. The compact geometry, simple planar structure, and experimentally validated performance make the proposed antenna a promising candidate for next-generation ultra-wideband wireless communication and sensing applications.