TY - GEN
T1 - Ultrawide In-Band Self-Interference Suppression Using Bandpass Filter-Based RF Cancellers
AU - Martin, Kevin
AU - Psychogiou, Dimitra
N1 - Publisher Copyright:
© 2023 European Microwave Association (EuMA).
PY - 2023
Y1 - 2023
N2 - An RF front-end based self-interference (SI) cancellation technique is reported for in-band full duplex (IBFD) communications. It is based on a simple and compact single-stage cancellation method in which a tuneable bandpass filter (BPF) alongside a static attenuator and a static phase shifter are incorporated in the RF canceller. By tuning the centre frequency and the inter-resonator coupling of the BPF, high SI suppression (20-40 dB) can be obtained within more than 1.5:1 of the frequency range. The operating principles of the ultra-wide SI cancellation concept are presented via a thorough design analysis that considers practical realization aspects and tuning effects. For proof-of-concept validation purposes a two-antenna system comprising ultra-wideband monopole antennas, and a BPF-based RF canceller was designed, manufactured and tested at S-band. It exhibited a >20 dB of isolation between 2.21-3.41 GHz (1.5:1).
AB - An RF front-end based self-interference (SI) cancellation technique is reported for in-band full duplex (IBFD) communications. It is based on a simple and compact single-stage cancellation method in which a tuneable bandpass filter (BPF) alongside a static attenuator and a static phase shifter are incorporated in the RF canceller. By tuning the centre frequency and the inter-resonator coupling of the BPF, high SI suppression (20-40 dB) can be obtained within more than 1.5:1 of the frequency range. The operating principles of the ultra-wide SI cancellation concept are presented via a thorough design analysis that considers practical realization aspects and tuning effects. For proof-of-concept validation purposes a two-antenna system comprising ultra-wideband monopole antennas, and a BPF-based RF canceller was designed, manufactured and tested at S-band. It exhibited a >20 dB of isolation between 2.21-3.41 GHz (1.5:1).
KW - bandpass filter (BPF).
KW - In-band full-duplex (IBFD)
KW - RF canceller
KW - simultaneous transmit and receive (STAR)
UR - https://www.scopus.com/pages/publications/85177606256
U2 - 10.23919/EuMC58039.2023.10290356
DO - 10.23919/EuMC58039.2023.10290356
M3 - Conference proceeding
AN - SCOPUS:85177606256
T3 - 2023 53rd European Microwave Conference, EuMC 2023
SP - 98
EP - 101
BT - 2023 53rd European Microwave Conference, EuMC 2023
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 53rd European Microwave Conference, EuMC 2023
Y2 - 19 September 2023 through 21 September 2023
ER -