Award Data

The Ka-/Q-band satellite systems offer potential for transportable and mobile communications through the effective use of the wide bandwidths available while requiring that adequate linearity performance be maintained. In environments where size and power conservation is of high importance, power consumption and heat dissipation in the power amplifier (PA) must be minimized. However, it is widely ...

Linearizer Technology Inc. produces analog predistortion linearizers. Integrated with a power amplifier (PA) and used for SATCOM applications they approach the performance of an ideal amplifier. Limitations of LTIs linearizers are the need for meticulous tuning to achieve the desired characteristics over frequency, and the need for adjustment to match a PAs specific characteristics. LTI has d ...

A novel sensor technology is suggested which has significant advantages in the areas of packaging and integration of sensors. It is proposed to develop this technology for pressure transducers. The key innovation of the process is the bonding of a sensor to a planar cover-wafer which contians through-wafer inteconnects. The sensor is hermetically sealed within the cover and is thus protected from ...

The objective of this proposal is to continue the development of an innovative filter design that combines cross-flow filtration, Dean Flow surface cleaning, a coiled tubular membrane filter (TMF), and an unhoused membrane module into an advanced, robust and simple reverse osmosis pretreatment system. Dean Flow is a secondary flow with a dual vortex form. The vortex profile generates a high shear ...

Accurate aerodynamic modeling is crucial to simulation, analysis and flight testing support of rotorcraft. In this regard, current analysis tools inadequately model key phenomena like blade dynamic stall, rotor tip loads, and rotor downwash because of their failure to predict the true unsteady three-dimensional nature of the aerodynamic environment near the rotor. Continuum Dynamics, Inc. (CDI) ...

A critical operational problem for Army rotorcraft is “brownout” caused by excessive dust and debris kicked up by helicopter rotorwash during take-off and landing. This can eliminate visibility and severely damage engine parts and rotor blades. Brownout is causing significant hazards for helicopter operations in Iraq and Afghanistan. The proposed effort will develop a physics-based aerodyna ...

This project will address the validation and testing of advanced processing techniques that are needed to support synthetic aperture radar (SAR) systems, particularly in the low-frequency UWB/UHF region for Navy littoral surveillance missions and for terrain characterization and mapping, especially in rugged forested regions. Underscoring this effort are MultiSpec's advanced signal processing algo ...

Silicone coatings are the system of choice for inflatable fabrics used in several space, military, and consumer applications, including airbags, parachutes, rafts, boat sails, and inflatable shelters. Commercial silicone coatings with improved mechanical, thermal and physical gas barrier properties are needed for a broad range of space, military, and commercial applications. The phase I program ...

Routine Metal-Organic Chemical Vapor Deposition (MOCVD) production of highly conductive and transparent ZnO films and application of these films in displays will be demonstrated in Phase I. We propose to grow highly conductive transparent ZnO films using MOCVD in a high speed rotating disk reactor (RDR). The goal of Phase I is to develop a low temperature (below 450oC) growth technique that econom ...

COMPUTATIONAL FLUID DYNAMICS (CFD) TOOLS HAVE NOW DEVELOPED TO THE POINT WHERE THEY CAN BE RELIABLY USED FOR THE DESIGN,EVALUATION, AND ANALYSIS OF SUCH HIGH-PERFORMANCE GAS TURBINES AS THOSE USED IN MODERN AERONAUTICAL PROPULSION SYSTEMS. FOR THESE APPLICATIONS, IT IS NECESSARY TO USE A THREE-DIMENSIONAL VISCOUS CFD CODE THAT COMBINES EFFICIENCY,ACCURACY, AND USER-FRIENDLINESS. FOR AXIAL TURBOMAC ...