A 60 GHz Polarization-Duplex TX/RX Front-End with Dual-Pol Antenna-IC Co-Integration in SiGe BiCMOS

摘要

In this work, a 60 GHz simultaneous transmit and receive (STAR) TRX front-end with co-integrated antennas to achieve efficient polarization-duplex mm-wave front-end is presented. The proposed antenna approach provides broadside radiation through the substrate and is compatible with low-res silicon substrates. On-chip slot structures are driven by PAs with antenna power combining for increased output power and efficiency. The orthogonal-polarization feeds provide >40 dB simulated isolation between TX and RX around 60 GHz. Subsequent TX self-interference cancellation (SIC) at the LNA output is achieved with part of the TX signal coupled to a cancellation path, includes a reflection-type attenuator (RTA) and reflection-type phase shifter (RTPS) that provides >20 dB gain variation and full 360° variable phase shift. Overall, total average SIC >40 dB is achieved for 1.07 GHz RF bandwidth at 60 GHz in the presence of a reflector.