Shared-Aperture Reflectarrays and Antenna Arrays for In-Band Full-Duplex Systems
Aman Samaiyar, Mohamed A. Elmansouri, Dejan S. Filipović
Abstract
A novel quasi-monostatic in-band full-duplex (IBFD) planar array architecture is proposed. Codesigned reflectarray and antenna array, sharing a common dielectric substrate, are shown to be effective IBFD antenna subsystem. The reflectarray elements are interleaved between active radiating elements to modify the scattering behavior of the hybrid aperture by collimating the incoming signal toward the desired direction. The sequential rotated array (SRA) of the truncated corner patch antennas is used to enhance the polarization purity of transmitted and reflected waves. The isolation between Tx and Rx ports of the antenna is achieved by exploiting the cross-polarization wave formed internal to the system between reflectarray and its feed. The proposed concept is designed and implemented for 27–29-GHz bandwidth. The Tx and Rx subsystems have the directivity of 19.6 and 27.1 dBic, respectively, and the isolation larger than 40 dB over the frequency band.