With all the interest in millimeter wave spectrum to expand 5G (and WiFi) capacity, this has moved rapidly up the agenda of major vendors’ R&D programs. Targeting the 28 GHz band, IBM and Ericsson have collaborated to produce a phased array antenna in silicon, measuring just 2.8-inches square, which would enable it to be deployed in a wide range of form factors. The joint research project has resulted in a silicon-based array of 64 antennas, which support concurrent dual polarization both in transmit and receive modes. The companies have demonstated their prototype in a module of the kind they expect to be integrated into future 5G base stations for mmWave bands. They showed off the device working in 28 GHz,…