Improved Isolation Between Ports of MultiMode Antenna with a Reconfigurable Pattern by Decoupling Network

Tonga M., ALATAN L., Civi O. A.

17th European Conference on Antennas and Propagation, EuCAP 2023, Florence, İtalya, 26 - 31 Mart 2023 identifier

  • Yayın Türü: Bildiri / Tam Metin Bildiri
  • Doi Numarası: 10.23919/eucap57121.2023.10133487
  • Basıldığı Şehir: Florence
  • Basıldığı Ülke: İtalya
  • Anahtar Kelimeler: decoupling network, gain improvement, isolation enhancement, pattern reconfigurable antenna
  • Orta Doğu Teknik Üniversitesi Adresli: Evet

Özet

In this study, a decoupling network is designed and implemented to a concentric circular patch with a ring antenna whose two ports are strongly coupled. The ports of the antenna are excited with phase differences to have different radiation modes at same frequency for pattern diversity. Strong coupling between the ports is inevitable and a decoupling network consisting of a lumped element is inserted between the ports to improve the isolation. With inductive and capacitive decoupling network designs, the ports of the antenna are decoupled. Lower than -20 dB isolation (|S21|) is achieved which improves active |S11| substantially. As a result, realized gain values of the antenna are increased by 2-3 dB.