The objective of the phase i research is to study the development of various types of low noise 44ghz receiver front ends, and to identify developmental difficulties and technical risks associated with each design. a highly reliable, space quantifiable, low noise 44ghz is receiver needed. the study… More

The research proposed investigates the feasibility of small millimeter wave radios with servo driven antennas for emergency line-of-sight communications for both ground-to-ground and groundto-air use. the considerations impacting desirability of the concept include the search mode method, data… More

A broadband (5-20 ghz) high performance thin absorber that utilizes ferrites and is based on the ferromagnetic resonance (fmr) phenomena is proposed. crystalline structures that have a high residual magnetization (anisotropic field) and which will be used a mixture of ferrite materials with… More

The deleterious effects of randome depolarization on polarimetric processed seeker performance including corruption of the processed data wherein the ability to achieve target discrimination and/or classification is reduced. if the system uses monopulse tracking, a secondary implication of radome… More

The development of a remote means for detecting ice formation on pavement using a millimeter-wave radiometric sensor is proposed. a radiometric sensor has unique advantages over other remote-sensing schemes and has demonstrated ice detection capabilities in other, similar applications. the sensor… More

This research will quantify the theoretical basis and performance of a new class of antennas with beam steering capability. the approach is based on quasi-optical techniques in conjunction with a novel bulk phase shifter design concept. in one implementation, the phase shifter may be mechanically… More

The development of small, solid state sources at the 0.7-2 mm wavelength (150 to 430 ghz) region is required to replace tube-type sources which have large, bulky power supplies. we propose to develop a low cost, broadband and efficient technique using single and multiple diodes configured as… More

The development of fabrics capable of providing significant radar signature reduction is proposed. both thin and thick techniques are identified that can be used for uniforms, parachute applications and personnel items. these fabrics will be designed to be compatible with collateral visual and ir… More

In the past 10 years much progress has been made in the development of low noise receivers which can serve as imaging millimeter wave devices. the application of quasi-optical techniques has been one source of help to millimeter wave systems. developments in superconductor-insulator-superconductor… More

The current methodology of multispectral hardware-in-the-loop (hwil) target simulation is to mechanically position an ir/rf target head via a robot, for instance, located in a large anechoic chamber. the target hed includes an ir point source plus a three (or four) element antenna array to simulate… More

The availability of airborne sensors capable of detecting buried and surface minefields from altitudes of 100 feet, or higher, would be a significant asset to u.s. defense forces. this system would not only improve the effectiveness of our forces, but also reduce man and material losses which are of… More

Current phased array antenna technology utilizes discrete digital or analog ferrite phase shifters which are high cost and rf power limited when in the transmit mode due to the ferrite saturation phenomena. the research investigates macromolecule and electroheological suspensions (ers) as an… More

A submarine periscope is modeled as a cylindrical metal reflector poking out of a rough sea. The time variant component of its radar cross section (RCS) behaves as a Swerling Type I target whose magnitude can be reduced by application of RAM. Various options exist for incorporation of RAM into an… More

The objective of this basic research is to design and develop a low-frequency, ultra-wide band (UWE) antenna. Such an antenna combined with a pulse-generating radar system would be capable of penetrating and detecting targets through foliage, ice, snow, and even earth. Development of appropriate… More

Navy Applications of compact antennas span nearly all frequency bands, from ELF to SHF. In the short wavelength bands, electronically-steered array applications would benefit from small element-to-element spacing because in such geometries The effort begins with fundamental approaches to… More