White Papers

This application note provides a description of the basic operation of the autotrack modulator (ATM) including an overview of antenna tracking systems, descriptions of the error terms and specifications associated with ATMs and descriptions of several typical ferrite-based ATMs built by EMS.

EMS designed and built the programmable beam forming networks for DSCS, MILSTAR and Advanced EHF. This white paper addresses the alternative for providing on-orbit reconfigurability for next-generation commercial communications satellites and describes the implementation options for MBAs and BFNs, including typical performance values for EMS’ BFN components.

This white paper discusses the reliability of ferrite devices in military and commercial microwave antenna applications using interference theory (stress vs. strength analysis used to determine mechanical and electromechanical component reliability).

This white paper outlines the problems inherent in active phased array antennas, and discusses the advantages of passive phased array antennas for radar systems including the cost-performance trade and how it affects the entire phased-array antenna architecture.

This application note describes an EMS-patented polarization switch that can be applied from X-band through Ka-band and enables several operational capabilities that are not present in single-polarization radars including Target Enhancement, ECCM, Target Identification and Rain Clutter Suppression.