摘要:
Embodiments of apparatus for providing distributed airborne wireless communications are provided herein. In some embodiments, a distributed communication payload includes: a payload control electronics module; an air-to-user link module to provide wireless communication links between airborne platforms and end-user devices; and an air-to-air link module to provide wireless communication links between airborne platforms; wherein the air-to-user and air-to-air link modules are subdivided into multiple sections that can be disposed on different airborne platforms.
摘要:
A method is provided for fabricating a thin film semiconductor device. The method includes providing a plurality of raw semiconductor materials. The raw semiconductor materials undergo a pre-reacting process to form a homogeneous compound semiconductor target material. The compound semiconductor target material is deposited onto a substrate to form a thin film having a composition substantially the same as a composition of the compound semiconductor target material.
摘要:
Formation of stretchable photovoltaic devices and carriers is described. In some examples, a formation method includes: forming a stretchable carrier including a stretchable part having a given length, the given length being operable to change in response to a force being applied to the stretchable carrier; depositing a photovoltaic cell over a surface of the stretchable carrier; and interconnecting the photovoltaic cell to output terminals.
摘要:
A method and apparatus of forming compositionally homogeneous particles is provided. The method includes forming a homogenous melt from a plurality of constituent materials under a first pressure sufficient to prevent substantial vaporization of the constituent materials. Droplets are generated from the homogenous melt. The droplets are cooled under a second pressure sufficient to prevent substantial vaporization of the constituent materials at least until the homogeneous particles formed therefrom have stabilized.
摘要:
A method for forming a high purity, copper indium gallium selenide (CIGS) bulk material is disclosed. The method includes sealing precursor materials for forming the bulk material in a reaction vessel. The precursor materials include copper, at least one chalcogen selected from selenium, sulfur, and tellurium, and at least one element from group IIIA of the periodic table, which may be selected from gallium, indium, and aluminum. The sealed reaction vessel is heated to a temperature at which the precursor materials react to form the bulk material. The bulk material is cooled in the vessel to a temperature below the solidification temperature of the bulk material and opened to release the formed bulk material. A sputtering target formed by the method can have an oxygen content of 10 ppm by weight, or less.
摘要:
An aircraft assembly includes at least one first wing portion providing a lift force during a horizontal flight, at least one wing opening disposed on a vertical axis of the at least one first wing portion, at least one vertical thruster positioned inside the at least one wing opening to provide vertical thrust during a vertical flight, and a mounting system including an open frame portion in a frame of the aircraft and at least one attachment member disposed in the open frame portion to attach at least one pod to the open frame portion in the aircraft frame. The aircraft assembly can further include at least one pod including a mounting frame to attach to the mounting system and a cabin to contain at least one of cargo and passengers.
摘要:
A method and apparatus for forming a thin film of a copper indium gallium selenide (CIGS)-type material are disclosed. The method includes providing first and second targets in a common sputtering chamber. The first target includes a source of CIGS material, such as an approximately stoichiometric polycrystalline CIGS material, and the second target includes a chalcogen, such as selenium, sulfur, tellurium, or a combination of these elements. The second target provides an excess of chalcogen in the chamber. This can compensate, at least in part, for the loss of chalcogen from the CIGS-source in the first target, resulting in a thin film with a controlled stoichiometry which provides effective light absorption when used in a solar cell.
摘要:
Embodiments of methods and apparatus for close formation flight are provided herein. In some embodiments, an apparatus for close formation flight, comprises a plurality of sensors for collecting measurements characterizing airflow near an aircraft. The plurality of sensors are attachable to at least one of a wing, fuselage, or tail of the aircraft, and the measurements provide information about airflow velocity in a direction transverse to a direction of the aircraft flight.
摘要:
A mobile system includes a self-supporting platform, a tunable anti-reflective (AR) skin or film disposed on and secured to the mobile platform, one or more actuators and a controller. The tunable AR skin or film includes one or more layers that are at least partially transmitting to optical energy at one or more optical wavelengths. The skin or film is substantially flexible and/or stretchable and has an optical AR to incident electromagnetic radiation of a given wavelength which is selectively variable when flexed and/or stretched. The actuators are able to flex and/or stretch the skin or film in response to receipt of a control signal. The controller generates the control signal based on a measured value of the electromagnetic radiation transmitted through the tunable AR skin or film.
摘要:
Methods and apparatus for supplying power to an electrical line or grid by using high-frequency alternating current (HFAC) are provided herein. In some embodiments, an apparatus for collecting and transmitting electrical power to an AC line operating at a line frequency may include a plurality of high frequency AC power sources; a high frequency AC bus, connected to each of the high frequency AC sources; and a line frequency converter, the input of which is connected to the high frequency AC bus and the output of which is connectable to the AC line.