Tile sub-array and related circuits and techniques

摘要

A tile subarray includes an upper multi-layer assembly (UMLA) provided from a first plurality of printed circuit boards and a lower multi-layer assembly (LMLA) provided from a second plurality of printed circuit boards. Each of the UMLA and LMLA includes one or more radio frequency (RF) interconnects between different circuit layers on different circuit boards which make up the UMLA and LMLA. The RF interconnects can include one or more RF matching pads which provide a mechanism for matching impedance characteristics of RF stubs to provide the RF interconnects having desired insertion loss and impedance characteristics over a desired RF operating frequency band. The RF matching pads allow the manufacture of circuit boards having RF interconnects without the need to perform any back drill and back fill operation to remove stub portions of the RF interconnects in the UMLA and LMLA.