Abstract: An active electronically scanned array (AESA) is disclosed. The AESA includes a linear-to-circular polarizer coupled to a radiating aperture and one or more transmit-receive modules coupled to radiating elements and a liquid cooling manifold having a plurality of distributed liquid cooling ducts disposed adjacent the one or more transmit-receive modules to provide cooling of the AESA during high-power operation.

Abstract: The present invention provides a method for automatically activating an optical light valve. The method includes providing a photorefractive cell having a birefringent medium which is doped with nanoparticles and transmitting light through the photorefractive cell to create an electric field in the photorefractive cell such that the alignment state of the birefringent medium and nanoparticles is changed to thereby reduce the intensity of the light being transmitted therethrough, wherein the intensity of light is reduces without an external power source.

Abstract: An optical filter structure for blocking radiation at or shorter than a preselected design wavelength is described which comprises a substantially transparent dielectric host material having dispersed therethrough a multiplicity of grains in preselected size and volume density within the dielectric, the grains comprising a material characterized by a transition between insulating and superconducting states at a characteristic transition temperature. The grains have diametric size substantially smaller then the longest wavelength of light to be absorbed, the filter absorbing resonantly via the dielectric anomaly and being tunable through selection of volume fraction of the grains within the dielectric.

Abstract: A target processor utilizing a feedback loop to maintain a constant false alarm rate for variable level video input signals with noise or noise plus clutter on the input signal. The processor includes three serially connected stages of binary coincidence detectors which comprise a threshold detector for processing video signals which exceed a threshold level, an M of N detector for providing an alarm for each range gate having a count of M or greater pulses, and a P of Q detector for generating a target alarm after at least P or greater frequencies have been transmitted.

Abstract: A system for communicating a time reference or clock signal to a plurality of processors over substantial distances where propagation time between units is significant compared to the processing time. The timing signal is in the form of two continuous sinusoidal waves of different frequency but equal amplitude, which are added to give equal contributions in the resultant composite, two frequency, sum signal. The resulting waveform has sharply defined nulls occurring at the difference frequency which are used as a precise time reference.

Abstract: A programmable arithmetic logic unit for performing high speed bit sliced, pipelined computations at very low power is fabricated as an LSI component using CMOS/SOS technology. It is microprogrammable and operates in conjunction with a fast microprogram store program memory and controller. Dual input ports which supply data from eight sources are latched and operated on while new data is simultaneously fetched. Instruction bits shift data in either port left or right, select complements and select an operand between device input and output data in one port. The data processed in each port is compared and is added to provide a latched tri-state output to an external device.

Abstract: Improvement to a fixed-wing airborne vehicle which results in significant delay drag rise well into the transonic regime. The fundamental features of the improvement include: fixedly skewing the wings at 45 degrees; shaping the outboard ends of the wing tips so that the trailing edge of the forwardly disposed wing is swept forwardly and the leading edge is straight relative to the trailing edge, and so that the leading edge of the rearwardly disposed wing is swept rearwardly and the trailing edge is straight relative to the leading edge; and, blending the leading and the trailing edges of the planform, so as to increase the local chord and control the longitudinal position of the maximum thickness in the root area (i.e., at the interface of the inboard tip end of each wing with the fuselage).

Abstract: A ferrimagnetic sphere that is biased to the subsidiary resonance mode and placed within a microwave slotted resonant structure functions as a frequency selective microwave power limiter. When the power level of a signal at the input port exceeds a threshold level, the device prevents the power level at the output port from increasing further. A weak signal present simultaneously passes with relatively little attenuation if it is slightly offset in frequency.

Abstract: A method for synthesizing perfluoropolyethers by effecting addition reactions under low temperature photolysis between perfluoroolefins, perfluorodialkyl peroxides and fluoroxyperfluoroalkanes resulting in the synthesis of new compounds.

Abstract: As new compositions of matter, ethynyl-substituted aromatic ortho-diamines. The compounds are useful as endcapping agents for thermally stable heterocyclic oligomeric compositions.