Polaris Innovations Limited, a subsidiary of Wi-LAN Inc., itself controlled by publicly traded Quarterhill Inc., has filed suit in the District of Delaware against Xilinx (1:22-cv-00174) over the provision of field-programmable gate arrays (FGPAs). The plaintiff asserts four patents from the large portfolio that it received from Infineon in July 2015, two of them for the first time. Over the years, Quarterhill has announced settlements with all four of the prior defendants in this campaign, which began back in 2016.