Design of Quad-port Circular MIMO Antenna With Isolation Improved by Shorting Walls

Toktaş A., Ustun D., Tekbas M.

24th International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory (DIPED), Lviv, Ukrayna, 12 - 14 Eylül 2019, ss.93-96 identifier identifier

  • Yayın Türü: Bildiri / Tam Metin Bildiri
  • Doi Numarası: 10.1109/diped.2019.8882634
  • Basıldığı Şehir: Lviv
  • Basıldığı Ülke: Ukrayna
  • Sayfa Sayıları: ss.93-96
  • Anahtar Kelimeler: antenna design, microstrip antennas, MIMO antennas, quad-port, co-located antenna, circular antennas
  • Ankara Üniversitesi Adresli: Evet

Özet

A compact co-located quad-port circular multiple-input-multiple-output (MIMO) antenna system operating at a wide frequency range of 3.0 - 5.0 GHz is designed in this study. The antenna system comprises a 20 mm radius circular patch composed of four co-located elements fed by 50 Ohm probe and a 50 x 50 mm(2) ground plane. To alleviate the mutual coupling among the antenna elements, the circular patch is split into four quadrants using two orthogonal shorting walls (SWs). In order to further improve the impedance matching, two circular slots are etched on the edge of the elements. The mutual coupling reducing performance of the SW is examined through the surface current and E-field distributions. The performance analysis of the MIMO system, regarding the radiation patterns, envelope-correlation-coefficient (ECC) and peak gain is thoroughly investigated. The antenna system is eligible for especially the access points due to being compact and versatile.