The growing reliance on wireless electronic systems presents us with a need for new diversity antennas for civilian and military platforms. These antennas must take account of platform curvature, material treatments and nearby interactions, all of which affect the antenna performance. To support… More

The growing reliance on wireless electronic systems presents us with a need for new diversity antennas for civilian and military platforms. These antennas must take account of platform curvature, material treatments and nearby interactions, all of which affect the antenna performance. To support… More

We propose the development of an ultrawideband 20-2000 MHz direction finding array for a Unmanned Aerial Vehicle (UAV) such as the Hunter and Shadow 200. An innovative, miniature broadband conformal aperture is proposed as the array element to minimizereal estate and increase the frequency… More

"There is a great need for multifunctional communication arraysthat are small and fit within a specified submarine enclosure.Concurrent low and high frequency functionality presents us withadditional challenges. We propose herein the development of abroadband multifunctional array for operation when… More

"With the availability of fast and powerful computational facilities, we are now able to characterize full-scale vehicles. However, recent developments in fast methods and the availability of new hybrid methods that combine integral, differential and highfrequency methods, have yet to be exploited… More

"Satellite communications has advanced remarkably and applications are now expanding rapidly, particularly in the use of very small aperture terminals (VSATs). In many instances, military forces are required to establish and maintain communications viaSATCOM (using VSATs) while stationed temporarily… More

There is a need for new innovative design concepts for developing conformal antennas for military, aerospace, and civilian applications. Conventional conformal antennas are designed to be `flush-mounted' to the shape of the aircraft, spacecraft, groundvehicles and personnel equipment for reasons… More

Radar signature prediction has been the focus of much research and development for the past 50 years. With the increasing CPU speeds, the focus over the past 15 years has been to develop fast and rigorous simulation tools for composite structures. Evenwith modern computational resources,… More

To avoid detection by enemy radar, military platforms are often coated with Radar Absorbing Material (RAM). RAM is intended to operate over a wide range of frequencies with a minimum amount of angular dependence to increase platform survivability. Themain objective of the proposed Phase II work is… More

Joint Tactical Radio System (JTRS) is a software radio capable of tuning from 2MHz to 2000MHz. A wideband antenna or a set of antennas are needed to support operation across the entire frequency spectrum of JTRS. To meet this need, Applied EM is proposingan innovative conformal design, which… More

To avoid detection by enemy radar, military platforms are often coated with Radar Absorbing Material (RAM). RAM is intended to operate over a wide range of frequencies with a minimum amount of angular dependence to increase platform survivability. Wepropose the development of a framework for… More

Rigorous modeling of topside ship apertures and finite arrays involving many thousands of array elements is a formidable computational task. The problem is further exacerbated by the presence of several such apertures and their interactions in the presenceother ship structures and scattering… More

There is a need for new innovative concepts for designing conformal antennas for a full spectrum of military, aerospace, and civilian applications. In many cases, the design of conformal antennas is severely limited due to the lack of new materials technologies that enable antenna designs that can… More

Submarines require a suite of antennas for communications, navigation, and identification of Friend or Foe (IFF). As compared to surface ship antennas, submarine antennas are unique in design, shape, materials, and performance due to space and weight limitations often in extreme environmental… More

Joint Tactical Radio System (JTRS) is a software radio capable of tuning from 2MHz to 2000MHz. A wideband antenna or a set of antennas are needed to support operation across the entire frequency spectrum of JTRS. To meet this need, Applied EM is proposing an innovative conformal design, which… More

Current anti Jam GPS antennas are approximately 14" in diameter making them too large for several platforms of interest such as unmanned aerial vehicles, missiles and fighter aircrafts. A modified version of this antenna array is significantly smaller in size (seven inch diameter) but incorporates… More

Providing accurate PVT (Position, Velocity and Time) information is very critical for systems like Joint Precision Approach and Landing System (JPALS). JPALS is a key component enabling U.S. military forces to be highly mobile and capable of "rapid response" on a global basis to a wide range of… More

The proposed research effort addresses two main shortcomings in the state-of-art GPS anti-jam systems. One of them relates to antenna size and the other pertains to performance limitation imposed by antenna electronics implementations. The current antenna array GAS-1 CRPA has seven antenna… More

Direction Finding (DF) systems on rotorcrafts vehicles and more specifically rotorcraft UAVs suffer from effects on rotorcraft blade modulations. Only coarse DF on rotorcraft has been achieved during the EH-60 QuickFix program. During this effort, Applied EM is proposing to develop very accurate… More

One of the greatest technical challenge facing submarine communications is fielding antennas capable of high data rates required by future broadcast circuits. Example antennas include those for communications, navigation, and Identification of Friend or Foe (IFF) capabilities. As compared to surface… More

Providing accurate PVT (Position, Velocity and Time) information is critical for network-centric warfare. The Global Positioning System (GPS) has become integral component for obtaining the PVT information on many DoD platforms. In addition of the weak signal power from GPS satellites, these GPS… More

There is an increasing need for novel antenna apertures and surveillance components to address the network-centric environment envisioned for future Navy combat operations. Given the lack of available real-estate, the only viable approach is to reduce antenna size and increase aperture bandwidth to… More

Body wearable antenna systems designed for Land Warrior/Ground Soldiers are vulnerable to signal cancellations due to multipath and higher losses . Diversity and MIMO techniques integrated with these antennas can mitigate multipath and shadowing effects to increase the overall link system… More

Numerical methods have proved very successful in low and mid frequency (VHF/UHF) regimes. However, these full wave methods are not efficient in handling electrically large problems dealing with radiation and coupling predictions for antennas on aircraft at higher frequencies (S/X/Ku/Ka bands).On the… More

Ubiquitous applications of Global Positioning System (GPS) systems imply a requirement for smaller GPS antennas and arrays to be adapted in all sorts of military and commercial platforms from missiles to small UAVs and even for hand-held applications. Current anti-jamming GPS antennas are… More

Much effort have been devoted in recent years to develop compact broadband antennas to address antenna congestion on small aerial platforms (including small Unmanned Airborne Vehicles) and the explosive growth of communication and connectivity needs. Over the past few years, Applied EM developed and… More

As NASA prepares for future space missions and the return to the moon by 2020, astronauts will be required to spend more time exposed to the hazards of performing Extra-Vehicular Activity (EVA). Providing and maintaining reliable communications and overall information transfer is imperative during… More

With rapid advances in JTRS, the demand for broadband conformal antennas has risen dramatically. Traditionally, emphasis has been given to size and shape optimization of antenna geometry and such methodology has limitations to reach the optimum limits. The proposed research stems from Applied EM's… More

Small antennas are required to support surveillance sensors, communication links, navigation systems, command and control systems, and precision strike capabilities on Unmanned Combat Aerial Vehicle (UCAV) .Research advancements in meta-materials show promise in the design of high efficiency small… More

This effort addresses the integration of antenna apertures for conformal installation. A goal is to provide a common or multiband conformal aperture covering the complete communication band (e.g. JTRS 20MHz-2GHz). To address the challenges of conformality, wide bandwidth and miniaturization, we… More

Numerical methods have proved to be very successful in low and mid frequency (VHF/UHF) regimes. Although these methods are based on rigorous integral or partial differential equation formulations, they cannot presently solve electrically large problems of EM radiation pattern and coupling prediction… More

As NASA prepares for the Constellation Space Missions and Extra-Vehicular Activity (EVA) on the moon by 2018, astronauts will be required to spend more time exposed to the hazards of EVA operations. Providing reliable communications is imperative during current EMU/ISS operations as well as future… More

Physical insights provided by the Characteristic Mode (CM) theory are utilized to optimize HF, VHF, and UHF antennas onboard small low-cost autonomous scouting/surveillance UAVs. Increasing demand for real-time high data rate communication links between mobile or short-term stationary network nodes… More

Much effort has been devoted in recent years to develop compact broadband antennas to address antenna congestion on small aerial platforms (including small Unmanned Airborne Vehicles) to address the explosive growth of communication and connectivity needs. Over the past decade, Applied EM has also… More

Small antennas are required to support surveillance sensors, communication links, navigation systems, command and control systems, and precision strike capabilities on Unmanned Combat Aerial Vehicle (UCAV). Research advancements in metamaterials show promise in the design of high efficiency small… More

Currently available communications antennas for aircraft have several problems. Blade antennas are inherently resonant structures that are difficult to extend to wider bandwidths, they impact the flight characteristics of faster aircraft, and they may present an ice accumulation problem on some… More

US Department of Defense is heavily dependent on the Global Positioning System (GPS) for geolocation, navigation, timekeeping and other military operations. Multipath due to the structure (platform on which the GPS receiver is mounted) scattering can degrade the accuracy of GPS measurements (code… More

The goal of this effort is to provide electromagnetic scattering tools (radar cross section/RCS codes) for small boats in littoral and deep ocean environments. This goal is within the larger scope of developing electromagnetic (EM) modeling and simulation (EMMS) tools for large scale simulations as… More

Body wearable antennas are needed in the context of Tactical Network Communications for the Land Warrior/Ground Soldier System ensembles. Specific bands of interest are 225-1000 MHz and 1350-2700 MHz. These frequency bands are particularly vulnerable to signal cancellations due to multipath.… More

Ubiquitous needs for Global Positioning System (GPS) systems implies a requirement for smaller GPS antennas and arrays that can be adapted in all sorts of military and commercial platforms from missiles to small UAVs and even for hand-held applications. Current anti-Jam GPS antennas are… More

Currently, there are two types of antenna configurations which are used with GPS receivers, fixed reception pattern antenna (FRPA) and controlled reception pattern antenna (CRPA). FRPA is a single element antenna and can not use angle of arrival as a discriminator to suppress interfering or jamming… More

The objective of this project is to develop a low-profile body-wearable VHF antenna (30MHz to 88MHz) for peer-to-peer communications. A requirement is that the antenna be fitted and practically integrated within the soldier's Improved Outer Tactical Vest (IOTV). Two antenna types are typically used… More

US Department of Defense is heavily dependent on the Global Positioning System (GPS) for geolocation, navigation, timekeeping and other military operations. Multipath due to the structure (platform on which the GPS receiver is mounted) scattering can degrade the accuracy of GPS measurements (code… More

Numerical methods have proved to be very successful in low and mid frequency (VHF/UHF) regimes. Although these methods are based on rigorous integral or partial differential equation formulations, they cannot presently solve electrically large problems of EM radiation pattern and coupling prediction… More

Antenna placement on electrically large aircraft bodies is becoming a critical issue. Use of full-wave solvers to assess the on-platform performance of an antenna or the interaction between two antennas is impractical, both in terms of computing resources required and length of execution time. The… More

Currently, two types of antenna configurations are in use with GPS receivers; fixed reception pattern antenna (FRPA) and controlled reception pattern antenna (CRPA). FRPA is a single element antenna and, thus, can not use angle of arrival as a discriminator to suppress interfering signals or… More

Currently, naval aircraft are covered with many antennas for VHF/UHF LOS communications, UHF satellite communications, L-band and GPS functions. Some of these antennas are of the blade type whose bandwidths are difficult to extend and whose form factor can impact the flight characteristics of the… More

ABSTRACT: The Global Navigation Satellite System (GNSS) includes a modernized Global Positioning System (GPS), the European Galileo, Russian Glonass, and the Chinese Beidou systems. At present, most systems are GPS only, but new GNSS receivers will use some of the additional GNSS systems becoming… More

Combined with the demands for UASs is the increasing demand for additional electronic systems, payload carrying capacity, and antennas that are required for each electronic/communication system on the platforms. Broadband conformal antennas offer unique solutions to the strict size weight and power… More

ABSTRACT: The Global Navigation Satellite System (GNSS) includes modernized global positioning system, the European Galileo, Russian Glonass, and the Chinese Beidou systems. Many next-generation receivers will include additional GNSS satellite signals to improve accuracy and satellite availability.… More

It is critical to accurately predict radiation pattern, near fields and co-site coupling associated with antennas installed on electrically large airborne platforms, which can be addressed by asymptotic high frequency techniques such as the uniform geometrical theory of diffraction (UTD). However,… More

Antenna placement on electrically large aircraft bodies is becoming a critical issue. Use of full-wave solvers to assess the on-platform performance of an antenna or the interaction between two antennas is impractical, both in terms of computing resources required and length of execution time. The… More

It is critically important to accurately predict radiation pattern, near fields and co-site coupling associated with antennas placed on electrically large airborne platforms, which can be addressed by high frequency techniques such as the uniform geometrical theory of diffraction (UTD). However,… More

The objective of this SBIR effort is to develop controlled-impedance ground planes with reduced weight and thickness, and apply them antennas capable of operation at frequencies from 30 MHz to 600MHz without significant impact on aerodynamics, and designed to occupy the smallest practical surface… More

Objective of the proposed research effort is to design, build and test an experimental AJ antenna for GPS receiver and Iridium transceiver functionality and to develop novel signal processing techniques without compromising the AJ suppression capability of either of the two systems. The AJ antenna… More