Dual-Polarized Antenna with Dual-Differential Integrated Feeding for Wideband Full-Duplex Systems

Maksim Kuznetcov, Symon Podilchak, Ariel McDermott, Mathini Sellathurai

Research output: Contribution to journalArticlepeer-review

Abstract

A new two-port dual-polarized planar antenna with an integrated feeding circuit for in-band full-duplex (IBFD) applications is presented. The antenna consists of four H-shape slots, stacked patches for enhanced bandwidth (BW), and a separate layer of two differential (0° and 180° split) power dividers connected using vertical transmission lines which define the feeding system. The multilayer antenna is well matched from about 2.2 to 2.5 GHz with isolation values from about 40 to 60 dB. When compared to similar IBFD antenna systems, the proposed configuration provides a higher isolation BW (10%) and higher gain (7.8 dBi) whilst adopting a simple feeding network. Also, by using the proposed feeding circuit, the manufactured antenna does not require any external cables and couplers. This simplifies the structure and reduces the amount of cable connections. This allows for other analog-based self-interference reduction schemes for further improvements in the transmit and receive data link. In addition, the proposed antenna design was extended to a 4×1 array. These dual-differential IBFD antenna systems are a good alternative to more conventional full-duplex designs which typically require external coupler-based feeding. In addition, the operating BWs and isolation values offered by these S-band systems can support new data link possibilities for beam steering and future IBFD wireless networks by low-cost antenna and feeding circuit integration.
Original languageEnglish
Pages (from-to)1-10
Number of pages10
JournalIEEE Transactions on Antennas and Propagation
Early online date26 Jul 2021
DOIs
Publication statusE-pub ahead of print - 26 Jul 2021

Keywords

  • Dual-polarization
  • double-differential antenna
  • full duplex
  • isolation
  • simultaneous transmit and receive (STAR)

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