Raytheon Company

David L Hendry

Yueh-Chi Chang

Nathan A Liskov

Aravind B Movva

An antenna comprising a reflector have a center-fed shaped axially displaced elliptical (ADE) configuration with either an elliptical aperture or a truncated elliptical aperture is described.

Low profile high efficiency multi-band reflector antennas

A multiplexer system providing a transmission frame field containing information derived from the cumulative total of stuff bits used over a plurality of frames. The stuff bits which also have assigned positions in the transmission frame are generally used in asynchronous systems to compensate for the input data rate of a group not being a fixed submultiple of the transmission rate. The demultiplexer system uses the information derived from the cumulative total to improve the bit count integrity performance of data channeled out to a user device. Also, during transmission fade conditions, the demultiplexer uses information derived from the frequency of past stuff operations to maintain group bit count close to its expected value.

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Sudbury, MA, United States of America

David L Hendry