Millimetre-wave MMIC packaging compatible with surface-mount technology (SMT)

This paper presents an interconnect and packaging solution for millimetre-wave MMIC, based on collective wiring and surface mount technologies. The designed structure consists of an SMT CSP (Chip Scale Package) mounted on printed circuit board (PCB). This packaging concept has been applied to a millimetre-wave LNA and has been measured up to 60 GHz, exhibiting results close to bare die measurements (insertion loss per millimetre-wave transition lower than 0.5dB) and demonstrating the potential of this technology up to V-band

Optically beamformed beam-switched adaptive antennas for fixed and mobile broadband wireless access networks

In this paper, a 3-bit optical beamforming architecture based in 2×2 optical switches and dispersive media is proposed and demonstrated. The performance of this photonic beamformer is experimentally demonstrated at 42.7 GHz in both transmission and reception modes. The progress achieved for realizing these architectures with integrated optics is also reported. Due to its advanced features (i.e., potential fast-switching, huge bandwidth, and immunity to electromagnetic interference), the architecture is a very promising alternative to traditional beamforming technologies for implementing beamformed base-station antennas in fixed and mobile broad-band wireless access networks operating in the millimeter-wave band. The study presented here has been carried out in the frame of the IST 2000-25390 OBANET project