Compact Ka-band reconfigurable switch matrix with power failure redundancy

A compact 4×4 reconfigurable switch matrix with augmented functionality for Ka-band (17 - 22 GHz) space applications, based on Low-Temperature Co-fired Ceramic technology, is presented. In contrast to a preceding version, the matching networks were moved from the top layer to buried layers, and two external peripherals (digitally controlled bipolar current sources to bias PIN switches) were hybrid-integrated into the module. The module surface area measures only 25 mm × 25 mm, compared to former dimensions of 34 mm × 32 mm, corresponding to 40% size reduction. As an additional functionality, the vacant space in buried layers is exploited to furnish transparent paths bypassing the switch matrix module in case of power failure. The paper presents a promising approach for the design and implementation of transparent paths.