Engineering topics
Publications and source records attributed to Moussessian, A..
This paper discusses the challenges of placing Transmit/Receive (T/R) modules on a membrane array to achieve an active phased array.
We will show that a dramatic improvement in overall T/R module efficiency is possible using the results of current research in high-efficiency Class-E/F amplifiers.
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One method to dramatically reduce the weight, volume and associated cost of space-based SyntheticAperture Radars (SAR) is to replace the conventional rigid manifold antenna architecture with a flexible thin-film membrane. This has been successfully demonstrated as a passive array. To further reduce the cost and weight and provide 2D scanning required by space-based applications we also need to integrate the Transmit/Receive (TR) function into the inflatable antenna elements. This paper explores the constraints that must be placed on the active electronics of a flexible antenna array as well as some of the preliminary work in this area.
This paper will discuss a new multifrequency dual channel coherent radar depth sounder for sounding ice. This sounder is unique since it is a fully coherent chirp radar design to operate at low (1500') as well as high altitudes (30,000').
An extension to Deschamps's theorem for a class of 3-terminal bounded structures with one axis of symmetry is presented.
We present a 144-element terahertz quasi-optical grid frequency doubler. The grid is a planar structure with bow-tie antennas as a unit cell each loaded with a planar Schottky diode.
Deschamps's theorem for n-terminal complementary structures is reviewed. An extension to Deschamps's theorem for a class of 3-terminal bounded structures with one axis of symmetry is presented.