147results about How to "Improve bandwidth performance" patented technology

An apparatus for converting a manned aircraft for unmanned flight, the aircraft including at least one pilot control capable of manipulation to affect operation of the aircraft, the apparatus comprising a first actuator and a second actuator each configured to selectively provide movement or resistance to movement in a first manner including linear or rotational motion, a first clutch and a second clutch each configured to selectively couple movement of the associated actuator to the pilot control, and a vehicle controller capable of being selectively enabled to operate the pilot control actuators and clutches providing unmanned operation of the aircraft or disabled providing manned operation of the aircraft. The first actuator has a first scope describing a first amount of allowable movement, while the second actuator has a second scope larger than the first scope.

An electrical power generation system includes a transducer that generates electrical energy under dynamic mechanical loading. A buffer is mechanically coupled to the transducer and adapted to be mechanically coupled to a structure. The buffer facilitates the transducer to operate within a predetermined mechanical loading range to allow the system to provide electrical energy. An electricity generator module includes a transducer that generates electrical energy under dynamic motion conditions. A circuit coupled to the electrically transducer converts the electrical energy into usable electricity at a circuit output. A planar housing encloses the transducer and circuit and (i) allows the transducer to be exposed to the dynamic motion conditions and (ii) provides electrical contacts that facilitate delivery of the useable electricity for external circuitry.

An inverse dispersion fiber having a large effective area and a transmission system that incorporates the fiber for providing dispersion and dispersion slope compensation in a transmission fiber. The large-effective-area inverse dispersion optical fiber (IDF) has a negative dispersion and a negative dispersion slope. The effective area, A_eff, of the IDF preferably is greater than approximately 31 micrometers squared (μm²) at a transmission wavelength of approximately 1550 nm. The large-effective-area IDF is suitable for use with super-large-effective-area (SLA) transmission fiber for compensating dispersion in the SLA transmission fiber while reducing nonlinear effects between wavelength channels and cabling loss, which is especially advantageous in transoceanic and long-haul terrestrial systems. These nonlinear effects are inversely related to the effective area of the fiber (i.e., nonlinearities˜1/A_eff). Thus, an increase in the effective area of the fiber translates into a decrease in nonlinear interactions, which increases bandwidth capabilities and limits signal degradation. Furthermore, the large-effective-area IDF of the present invention has very desirable transmission properties. The present invention also provides a transmission system comprising at least one of the large-effective-area IDF optical fibers of the present invention. Furthermore, A_eff can be made large without having to increase the ratio, R_a, of the diameter of the core to the diameter of the trench region.

A broadband loaded antenna and matching network with related methods for design optimization are disclosed. The loaded antenna structures may preferably be either monopole or dipole antennas, but the particular methods and techniques presented herein may be applied to additional antenna configurations. The load circuits positioned along an antenna may comprise parallel inductor-resistor configurations or other combinations of passive circuit elements. A matching network for connecting an antenna to a transmission line or other medium preferably includes at least a transmission line transformer and a parallel inductor. Various optimization techniques are presented to optimize the design of such broadband monopole antennas. These techniques include implementation of simple genetic algorithms (GAs) or micro-GAs. Component modeling for selected components may be effected through either lumped element representation or curved wire representation. Measured results are presented to ensure that certain design criteria are met, including low voltage standing wave ratio (VSWR) and high gain over a desired frequency band.

An antenna arrangement for mobile communication, the antenna arrangement comprising a plurality of radiators (202, 203) for at least two different frequency bands, the plurality of radiators being placed on a reflector (204), wherein the plurality of radiators comprises a first group of radiators arranged to operate in a first frequency band of the at least two different frequency bands, wherein the plurality of radiators comprises a second group of radiators arranged to operate in a second frequency band of the at least two different frequency bands, the first group of radiators forming a first antenna, the second group of radiators forming a second antenna, wherein the radiators are cross-polarized, wherein the radiators (203) of the first group are of cross-type, and wherein the radiators (202) of the second group are of four-leaf type.

This invention relates to an Open Wireless Architecture (OWA) unified airborne and terrestrial communications architecture providing optimal high-speed connections with open radio transmission technologies (RTTs) between aircrafts and ground cells, and between different aircrafts in Ad-Hoc or Mesh network group, to construct the multi-dimensional unified information delivery platform across the airborne networks and the terrestrial networks wherein the same OWA mobile device or OWA mobile computer can be used seamlessly and continuously both in the aircrafts and on the ground.

The present invention by propagates a traveling wave of electric current along a microstrip antenna structure rather than a standing wave. By loading an antenna with a series of capacitive gaps of the correct values, the shape of the electric current distribution can be tailored to suppress the resonant properties of the antenna, specifically the standing wave of electric current that normally forms along the antenna structure. A microstrip antenna having a “bulls-eye target” structure comprised of a center disk and concentrically larger capacitively coupled annular sections will tailor the shape of the electric current distribution to achieve a suppression of the resonant properties of the antenna, thereby increasing the antenna bandwidth.