Abstract: An antenna receiving system having an array of dual sense antenna elements for receiving both right hand and left hand circular polarized radiation from each of one or more targets, a right hand and a left hand polarized radiation attenuator and a right hand and a left hand polarized radiation phase shifter connected to each antenna element, a direction finding computer for controlling the attenuators and phase shifters connected to each antenna element and for processing outputs from selected pairs of phase shifters in order to find a direction to each of the one or more targets, and a beam forming computer for control the attenuators and phase shifters in order to select a cluster of antenna elements for each of one or more targets, each cluster for receiving data from a target.

Abstract: A radio frequency (RF) thermal isolator and method of manufacture for same. According to one embodiment, the RF thermal isolator includes a first transmission line; a second transmission line of nominally the same dimensions as the first transmission line and axially aligned with the first transmission line, wherein the ends of the transmission lines are separated by a gap having a width that is a very small fraction of the center operating wavelength of the transmission lines; and an electrically conductive sleeve electrically attached to the end of the first transmission line and surrounding the end of the second transmission line and separated from the second transmission line by a gap having a width that is a very small fraction of the center operating wavelength of the transmission lines; wherein the sleeve extends along the second transmission line from the end of the first transmission line for a distance of nominally ¼ of the center operating wavelength of the transmission lines.

Abstract: A radio frequency (RF) thermal isolator and method of manufacture for same. According to one embodiment, the RF thermal isolator includes a first transmission line; a second transmission line of nominally the same dimensions as the first transmission line and axially aligned with the first transmission line, wherein the ends of the transmission lines are separated by a gap having a width that is a very small fraction of the center operating wavelength of the transmission lines; and an electrically conductive sleeve electrically attached to the end of the first transmission line and surrounding the end of the second transmission line and separated from the second transmission line by a gap having a width that is a very small fraction of the center operating wavelength of the transmission lines; wherein the sleeve extends along the second transmission line from the end of the first transmission line for a distance of nominally ¼ of the center operating wavelength of the transmission lines.