Navy Technology Transfer Navy Technology Transfer

Communications

Compact Antenna Assembly

Naval Information Warfare Center Atlantic (formerly Space and Naval Warfare Systems Center Atlantic)

This antenna from Naval Information Warfare Center Atlantic requires much less height and installation real estate than either the conventional one-quarter wavelength or the inefficient shortened version of the conventional one-quarter wavelength antenna. This allows the installation of compact and effective antennas in restricted areas, thus reducing installation and maintenance costs. This compact antenna assembly can be sized for efficient operation from the extremely low frequency through extremely high frequency bands.


Electrically Conductive Resonator for Communications

Naval Information Warfare Center Atlantic (formerly Space and Naval Warfare Systems Center Atlantic)

The purpose of this patented invention is to radiate or receive electromagnetic waves on an arbitrary electrically large conductive area to act as an ad hoc antenna. The invention’s assembly and associated electronics allows a radio transceiver to determine the resonance frequency that allows transmission and reception of electromagnetic waves at resonance, per-determined, or ad hoc frequencies between 3 MHz and 1 GHz.


Frequency Agile Electronically Small Tactical Amplitude Modulation Broadcast Band Antenna System

Naval Information Warfare Center Atlantic (formerly Space and Naval Warfare Systems Center Atlantic)

Typical antenna systems require a broadcast engineer to set up and maintain the antenna system, which is expensive. In addition, typical antenna systems require power shutdowns to tune the antenna system. Naval Information Warfare Center Atlantic holds two patents for a frequency agile electrically small tactical amplitude modulation (AM) broadcast antenna system that includes a transmitter, an antenna tuning unit (including the second patent for the method to tune the antenna), and a quick-erecting antenna mast that allows for the quick and efficient deployment of this system.


Gateway Router with Automatic Network Selection

Naval Postgraduate School

The Tactical Networked Communication Architecture Design (TaNCAD) laboratory at the Naval Postgraduate School has patented a methodology for integrating traditional Internet Protocol (IP) networks with Disruption-Tolerant Networks (DTNs). This is accomplished via a gateway router and software for application-aware automatic network selection, which translates data between networks and provides application-specific feedback. The router and method selects between an IP network and a DTN (or other network module supported via plugins). This is accomplished by monitoring the state of both networks, intercepting IP packets which could otherwise not be delivered, responding to the application that sent the packet, and translating a group of such packets into a DTN bundle. The software implementing this system resides on a network router that functions as a node on both the IP and DTN networks. In other scenarios, the system selects between or among wide area network accelerators, tactical networks, mobile ad hoc networks, sensor networks, vehicular networks, and satellite and deep space networks. This bridges the gap between the vast array of legacy IP-based applications, and a number of domain-specific networking paradigms that are not natively IP-compatible.


Live to Virtual Communication Bridge

Naval Air Warfare Center Training Systems Division

The live to virtual communication bridge provides distributed control of operational communication equipment (i.e., service radios) and relays the communications between different networks. This allows for adjustments of radio settings (i.e., frequency, presets, power) to be changed on a remote live radio from a local virtual radio interface. Virtual radios can be connected to operational radio switching systems (e.g., line-of-sight equipment, satellite communications equipment) to allow for seamless live and virtual training and tactical operations. This technology can provide the interface between operational satellite communications systems with encryption and other live radio frequencies in the field. A “makeshift” command center can utilize this technology to “link” multiple services (i.e., fire, police, medical) during an emergency operations scenario.


Method and Apparatus for Automated Secure One-Way Data Transmission System

Naval Surface Warfare Center, Port Hueneme Division

The present disclosure relates to a method and system for one-way data transmission from an open network to a closed network. A data transmission controller on an open network provides a data stream to first, second, and third transmitter nodes on the open network. The first and second transmitter nodes transmit the data stream to corresponding receiver nodes on a closed network. The third transmitter node transmits the data stream to a receiver node on the open network. Data transmission verification is performed at both the open network and the closed network.


Microstrip Patch Antenna Using a Highly Anisotropic Superstrate

Naval Undersea Warfare Center, Division Newport

Microstrip patch antennas are widely used in a variety of communications systems. They have the advantages of low weight and low profile, but typically can only support low bandwidth applications. Increased demands on legacy systems call for increased antenna bandwidth to support emerging requirements. It is generally not feasible to accommodate these new requirements in legacy form factors, and making the antenna larger is not a desirable option. This approach uses highly anisotropic materials for a novel solution to the problem retrofitting legacy antennas within the existing radome volume. A two-layer anisotropic superstrate sits on top of the patch antenna. Through proper design of the superstrate, and proper orientation of its polarization axis, improved bandwidth can be obtained. The primary advantage is that there is no need to redesign the antenna. The superstrate can be optimized for a given design and applied as a modification kit. This invention has applications to radio and satellite communications systems including automotive, commercial aviation, and satellite telephone, that use microstrip patch antennas and where improved antenna bandwidth is needed.


Minimal Reactance Vehicle Antenna for Department of Defense Vehicles

Naval Information Warfare Center Atlantic (formerly Space and Naval Warfare Systems Center Atlantic)

Mounting multiple antennas on a vehicle results in radio frequency cosite interference. This Naval Information Warfare Center Atlantic patent is for an optimized performance tactical antenna that operates on platforms and vehicles in the very high frequency (VHF) and ultra high frequency (UHF) bands along with other co-located VHF and UHF antennas. The minimal reactance vehicle antenna (MRVA) provides superior vocal communication over close spaced (<5 MHz) radio frequency transmissions on the co-located antennas to other non-local antennas. The MRVA antenna utilizes a structure which significantly reduces the height and footprint of the antenna as compared to traditional vertically polarized antennas on vehicle platforms.


Mobile Underwater Acoustic Communications

Naval Research Laboratory

Naval Research Laboratory (NRL) researchers have developed a method for mobile underwater acoustic communications that encodes a communication signal for transmitting a doubly differential (DD) spread spectrum (SS) communication output signal. The DD-SS method results in a highly reliable and efficient system for long range acoustic communications (LRAC). The innovative NRL DD-SS encoding methodology increases the signal-to-noise ratio through a processing gain, eliminates inter-symbol interference via multipath suppression, and enables bandwidth efficiency improvement with data multiplexing. Additionally, the use of DD coding/decoding obviates the need for explicit phase/Doppler tracking and correction. Thus, a system incorporating a DD-SS technique performs robustly against unpredictable fluctuations in underwater communication environments, making it particularly suitable for mobile LRAC. Advantages of this technology include: reliable signal reception at extremely low signal-to-noise ratios; very robust against unpredictable fluctuations in underwater communication environments; and lower system cost requiring less receiver components than existing systems. A potential application of this technology includes mobile long range acoustic communications achieved for remote unmanned underwater vehicles.


Nanosatellite Support and Technologies

Naval Information Warfare Center Pacific (formerly Space and Naval Warfare Systems Center Pacific)

Nanosatellites are important to the Department of the Defense and the Department of the Navy as they are cost-effective, quick to deploy, and can possibly perform many of the functions currently performed by expensive larger satellites such as global positioning system navigation, communications, surveillance, and earth imagery. Naval Information Warfare Center Pacific (NIWC Pacific) has developed several nanosatellite technologies including a patent-pending planar retro-reflector for tracking nanosatellites, various antennas, optical communications technologies, a deployable heat radiator, a multi-domain firewall router, and a store-and-forward method. NIWC Pacific launched the Accelerated Capability for Integration and Testing of Nanosats laboratory, or ACTION, in 2016. ACTION’s five-year mission is to match payloads made by small and large companies or government agencies with nanosatellite platforms and quickly integrate, test and launch them. NIWC Pacific has also developed a small-satellite communication constellation testbed for autonomous scheduling algorithms to enable mission performance analysis and demonstration. These technologies and capabilities may be available for licensing, use, or further development.


Optical Time Domain Reflectometer Calibration Standard and Instrument

Naval Surface Warfare Center, Corona Division

Naval Surface Warfare Center, Corona Division seeks partners to license and commercialize an optical time domain reflectometer (OTDR) calibration standard and instrument. Fiber optic cables must be tested by OTDRs for quality and inspected for potential defects which can be caused by spooling of the cable or other events. Navy researchers have developed a fiber optic cable calibration standard in combination with a device for calibrating distance and attenuation parameters of an OTDR. The attenuation and distance fiber optic cable calibration standard utilizes spooled fiber optic cable with a well-known length and well-known index of refraction assembled into a single, rack-mountable enclosure which also includes a visual inspection scope for checking fiber optic cable connectors for cleanliness. By use of this invention, well-known lengths of fiber optic cables are measured allowing for a direct comparison in units of length, rather than time. This Navy invention is calibrated against a National Institute of Standards and Technology model, an index of refraction for each of the spooled length of fiber optic cable is carefully characterized, and it allows for in-house testing thereby avoiding the shipping of expensive equipment to test centers.


Portable and Inflatable Antenna Device

Naval Information Warfare Center Atlantic (formerly Space and Naval Warfare Systems Center Atlantic)

Ultra high frequency satellite communications and mobile user objective systems are becoming an even more portable means of communication due to the current development of Joint Tactical Radio System hand held and manpack radios that support these wave-forms. A small, light, easy to pack, inflatable antenna developed by Naval Information Warfare Center Atlantic will allow more users access to satellite communications for quick beyond line-of-sight communications, in emergencies or as a backup when other communications fail. The wide beamwidth characteristics of the antenna require no pointing or knowledge of satellite position for basic satellite access. Additional gain is achieved when the antenna is pointed toward the satellite. Higher gain can be achieved by phasing multiple inflatable antennas together and/or adding a larger conductive reflector.


Secure Voice Over Internet Protocol to Analog and Digital Data, Extra-Vehicular Development

Naval Surface Warfare Center, Crane Division

Naval Surface Warfare Center, Crane Division has developed a device that allows a user to move away from their vehicle or base of operations while maintaining contact with multiple disparate voice and data networks. The device is currently used to transmit/receive crypto-secured voice/data between wideband tactical radio networks (PRC-117G), vehicle intercom systems, extravehicular remote computing units, and standard voice/data radio communication backbone. Several standard audio and network connections, a module for standard voice over internet protocol interactions, and an ability to use most worldwide standard voltages allow for rapid adaptability with other networks and devices. This technology is useful to fleet management, security organizations, and first responders because it reduces the amount of equipment a user carries and allows multiple organizations to combine voice and data onto a single device.


Smart Antenna Algorithm

Naval Air Warfare Center Training Systems Division

The smart antenna algorithm (SAA) is patented technology that provides frequency management capabilities across a spectrum of networked radio frequency communication devices. The tool determines the susceptibility of multiple radios to interference by mathematically modeling radio noise, nonlinearities, and image frequency. The SAA method uses antenna isolation, which varies between antenna elements, to map problem frequency nets to antenna pairs having greater isolation. The overall result is a boost to radio performance in order to balance and meet range coverage requirements. Even though the number of possible combinations for assigning frequency nets to antenna elements may be exhaustive, the algorithm runs in real-time with accurate results. The assignment algorithm/model may be used for automatic, intelligent, configuration and setup of distant, remote radios when incorporated into the remote interface control tool, an existing, fielded, radio-control baseline. The SAA can be used as a communications planner tool, for dynamic frequency trunking, and for rapid, ad-hoc communications set-up for emergency response units.