An efficient way to combine outputs from multiple solid-state amplifiers uses a cavity structure. their advantages include: low loss, amplitude and phase balance, large number of input ports, broad bandwidth and high power handling. their major disadvantage, however,is that they mode. moding, which… More

A low cost broadband microwave power divider has the potential for significantly reducing the cost of threat environment generators used in ew test systems. the objective of this project is to design a low cost power divider specifically for use in laboratory ew test systems in the 0.5 to 4.0 ghz… More

Near-field antenna measurement systems provide a powerful, and often the only feasible, method of determining the far field of very large aperture antennas or of spaceborne antennas. existing near-field measurement facilities require precise positioning systems for the probe antenna and as a… More

Human experts in the field of radar cross section (rcs) data analysis are scarce and in high demand, as are the facilities required to make such measurements. in addition, these facilities are very expensive to operate and many are located in remote areas where it may be impractical to post a… More

Degradation of communication and data links by the presence of intentional and unintentional interfering signals is a major problem in tactical environments. the use of high speed digital processors to control adaptive nulling arrays and interference cancellers is a necessary complement to current… More

Degradation of communication and data links by the presence of international and unintentional interfering signals is a major problem in tactical environments. the use of high speed digital algorithms to control adaptive nulling arrays and interference cancellers is a necessary complement to current… More

An outline for the design of a transportable high speed telemetry tracking system is described. the transportable system receives s-band telemetry data, determines the actual trajectory, provides uplink control of payloads, and provides flight termination capability. two systems are required to… More

The proposed program will apply the well-developed technology of isar (inverse synthetic aperture radar) imaging to the detection, location and evaluation of voids and void aggregates in resin-matrix composite structures. if good correlation is obtained between the electromagnetic scattering of void… More

Just as with other on-board counter measures systems, the rcs of lo aircraft requires performance verification prior to mission deployment. this phase i proposal outlines a program of study that will define the specifications for an rcs validation radar suite and its hardware realization. this… More

The ability to measure the strength of electromagnetic fields is of extreme importance in many areas. today's frequency spectrum is crowded. electromagnetic fields are everywhere and at all frequencies. of particular importance is the measurement of fields at an air/metal boundary because much… More

The characterization of clutter is critical to the design, development, and test of modern military seeker and radar systems. the nature of clutter is such that it can be characterized analytically only on a generalized basis; this is often inadequate to use in the assessment of system performance… More

Many government weapons testing facilities such as the kwajalein missile range depend on c band tracking radars such as the an/fpq-19 to provide angle tracking and range data during missile tests. these types of radars are still the primary instruments used for test support, although the state of… More

Millimeter waveradars are small and have narrow antenna beams. They are potentially well-suited for close-range fire control and target tracking. In particular, the Army is interested in a groung-based millimeter wave missile launcher radar that will track its missile and the target, then issue… More

1To produce and maintain product quality we contend that one must control the development and maintenance processess through the collection, examination and analysis of both process and product indicators. Process indicators provide measures that reflect the effectiveness of software development and… More

Modern seeker systems that employ multispectrum technology to optimize missile guidance performance are limited by the available volume. Specifically, placement of an IR seeker in the nose of an RF seeker radome creates blockage effects that vary as a function of the angle of the gimballed RF… More

A unique and beneficial configuration for a multiple input omnidirectional microwave antenna is described, in which a circulat phased array of eight antenna elements is fed by an eight input butler network. proper design of the array geometry and network will allow up to seven transmitters to share… More

Existing radars are very powerful and perform many functions. However, they have difficulty resolving multiple targets in the same range cell with similar doppler shifts when the targets are close in angle. Typically, targets closer than one beamwidth of the radar\'s aperture cannot be resolved with… More