1201results about "De-icing/drying-out arrangements" patented technology

A patch antenna for operation within a high temperature environment. The patent antenna typically includes an antenna radiating element, a housing and a microwave transmission medium, such as a high temperature microwave cable. The antenna radiating element typically comprises a metallization (or solid metal) element in contact with a dielectric element. The antenna radiating element can include a dielectric window comprising a flame spray coating or a solid dielectric material placed in front of the radiating element. The antenna element is typically inserted into a housing that mechanically captures the antenna and provides a ground plane for the antenna. Orifices or passages can be added to the housing to improve high temperature performance and may direct cooling air for cooling the antenna. The high temperature microwave cable is typically inserted into the housing and attached to the antenna radiator to support the communication of electromagnetic signals between the radiator element and a receiver or transmitter device.

An inventory control system and method that tracks inventories of items with RFID tags, includes a reader unit and an intelligent station that tracks RFID tags to determine item information of items to be inventoried. The reader unit transmits and receives RF signals. The intelligent station includes a first RF antenna connected to the reader unit by a first transmission cable through a first switch, and one or more additional RF antennae connected to the reader unit by the same first transmission cable through additional switches. An inventory control processing unit receives item information from the intelligent stations to update inventory information regarding the items to be inventoried.

A mixed-signal, multilayer printed wiring board fabricated in a single lamination step is described. The PWB includes one or more radio frequency (RF) interconnects between different circuit layers on different circuit boards which make up the PWB. The PWB includes a number of unit cells with radiating elements and an RF cage disposed around each unit cell to isolate the unit cell. A plurality of flip-chip circuits are disposed on an external surface of the PWB and a heat sink can be disposed over the flip chip components.

A reflector antenna includes a feed configured to always point during operation in a direction that opposes ingress of water into the feed, and a reflector having a truncated spherical reflecting surface, wherein a relative orientation of the reflector and the feed is adjustable. Another reflector antenna includes a feed configured to always point during operation in a direction that opposes ingress of water into the feed, and a reflector spaced apart from the feed by a focal length at least as great as a diameter of the reflector. Another reflector antenna includes a feed and a reflector having a truncated spherical reflecting surface, wherein the reflector is spaced apart from the feed by a focal length at least as great as a diameter of the reflector.

In a portable radio communication apparatus including a housing, at least one part of at least one of the housing is formed as a housing electrical conductor portion by an electrically conductive material. The housing electrical conductor portion is connected with a radio communication circuit of the portable radio communication apparatus so as to operate as at least one part of an unbalanced type antenna of the radio communication circuit. Further, the portable radio communication apparatus further includes a boom portion coupled with the housing at least at two positions so as to provide at least one penetrating hole between the housing and the boom portion.

A radio wave lens antenna device including a semispherical Luneburg lens and a radio wave reflection plate. The radio wave lens antenna device prevents the signal reception sensitivity from being lowered in rain or snow. The radio wave lens antenna device includes a semispherical Luneburg lens 1, a radio wave reflection plate 2 that is larger than the diameter of the lens, an antenna element 3, and a holder 4 that holds the antenna element. The radio wave reflection plate 2 is arranged in an erected state. An ice-snow-water resistant means, which includes a first cover 5 and a second cover 6, prevents rain, snow, and ice from collecting and running off the Luneburg lens.

A system and method for communicating with a medical implant is disclosed. The system (10,210,310,410) includes on-board electronics, a signal generator (15,215), an amplifier (16,216), a coil (14,214), a receiver (22,222), and a processor (20,220). The on-board electronics (100, 110) include a power harvester, a sensor, a microprocessor, and a data transmitter. The signal generator (15,215) generates a first signal, the amplifier (16,216) amplifies the first signal, the coil (14,214) transmits the amplified signal, the power harvester receives the first signal and transmits a data packet (18,218) containing data, the receiver (22,222) receives the data packet (18,218), and the processor (20,220) either processes the data or sends the data to a data storage device.

A microwave ablation probe for providing microwave energy to tissue is disclosed. The probe includes a feedline having an inner conductor, a secondary inner conductor, an insulating spacer, and an outer conductor. The inner conductor is slidably disposed within the secondary inner conductor. The feedline also includes a radiating portion having an extruded portion of the inner conductor centrally disposed therein, wherein longitudinal movement of the inner conductor relative to the feedline tunes the radiating portion.

Anti-icing methods and aerodynamic structures having laminated resistive heaters for de-icing are described. Several of the inventive aspects utilize laminated resistive heaters comprising a carbon nanotube layer and / or capacitors to store and supply electricity. The invention also includes methods of making aerodynamic structures having de-icing or anti-icing functionality.

The invention provides an integrated millimeter wave active phased-array antenna. The integrated millimeter wave active phased-array antenna is reliable in performance, ensures that the number of chips can be reduced, and reduces cost. According to the technical scheme, an antenna bearing layer is integrally connected to a feed network through an antenna array surface and a TR assembly; micro-strip patches of the antenna array surface are arranged below the antenna bearing layer according to a rectangular grid array and are connected with power amplifier chips of the TR assembly according to a 8*8 array scale, and every four power amplifier chips are connected with a four-channel integrated phase shifter to constitute a 2*2 sub-array circuit to be integrally connected with the feed network downwards; a radio frequency signal is input to a power dividing network through the feed network and is disseminated into four paths of radio frequency signals through a plurality of four-channel integrated phase shifters, and the radio frequency signals are input into corresponding power amplifier chips, are transmitted to the micro-strip patches and are transmitted; sixteen four-channel integrated phase shifters and sixty-four power amplifier chips are controlled by control signals through a low-frequency signal network to finish radio frequency signal space power synthesis and beam scanning.

An apparatus includes a heat receiving portion which receives heat within a footprint from a heat generating structure, and a cooling arrangement which causes flow of a coolant that absorbs heat at the heat receiving portion, the cooling arrangement being disposed in its entirety within a width of the footprint in a particular direction. A different feature involves an apparatus which includes a heat receiving portion at which a coolant receives heat, and a coolant separating portion which receives coolant traveling away from the heat receiving portion, and which separates liquid coolant from vapor coolant.

A wireless power transmission system includes a transmitter configured to transmit power waves including printed circuit boards where a printed circuit board and antenna boards, where each antenna board comprises one or more antenna elements, at least one antenna board resides on a printed circuit board, and the at least one antenna board is connected with a power feeding line. The transmitter further includes a heat sink attached to the at least one printed circuit board, wherein placement of the heat sink with respect to the at least one antenna board comprising the one or more antenna elements and shape of the heat sink is configured such that the heat sink operates as a reflector to direct wireless power waves transmitted from the at least one antenna board in a pre-determined direction.

A panel antenna having an enclosure, an internal cover, one or more micro radios and RF modules, and a radome is provided. The enclosure may include a rectangular rear panel, side walls with an interior surface to mount micro radios and an external surface to receive heat sinks, and a hinged front cover providing an internal cover. The internal cover may also have a plurality of RF radiating modules fastened thereto. The internal cover may also provide environmental sealing and electromagnetic shielding. The plurality of micro radios are located inside the cavity of the enclosure, and each micro radio is coupled to an RF radiating module. The micro radios may be mounted inside the enclosure on the side walls. The radome encloses the RF radiating modules. The radome may be mounted to the internal seal. Additionally, the panel antenna may further include a heat sink mounted on an exterior side of the rear panel. The heat sink on the rear panel may dissipate heat from additional active electronics, such as a communications hub or calibration radio. The micro radios and active electronics may be mounted such that the heat sinks dissipate heat generated by the micro radios.

According to one aspect of the present disclosure, a microwave antenna assembly is disclosed. The antenna assembly includes a feedline having an inner conductor, an outer conductor and an inner insulator disposed therebetween and a radiating portion including a dipole antenna having a proximal portion and a distal portion. The antenna assembly also comprises a sheath disposed over the feedline and the radiating portion defining a chamber around the feedline and the radiating portion. The chamber is adapted to circulate coolant fluid therethrough. The antenna assembly further includes a connection hub having cable connector coupled to the feedline, an inlet fluid port and an outlet fluid port. The connection hub includes a bypass tube configured to provide for flow of the coolant fluid from the cable connector directly to the outlet fluid port.

A lightweight millimeter wave outdoor unit includes a lightweight housing with a heat sink and mounting member configured for mounting on the antenna to form a wireless link. A millimeter wave transceiver board is formed of ceramic material and mounted within the housing. It includes a millimeter wave transceiver circuit that has microwave monolithic integrated circuit (MMIC) chips and operable with the transmit and receive boards. An intermediate frequency (IF) board has components forming an intermediate frequency circuit operable with the millimeter wave transceiver circuit. A frequency synthesizer board has a signal generating circuit for generating local oscillator signals to the transceiver circuit. A controller board has surface mounted DC and low frequency discrete devices thereon forming power and control circuits that supply respective power and control signals to other circuits on other boards. A quick connect / disconnect assembly is operative with the housing for allowing the housing to be rapidly connected and disconnected to the antenna circuit contact members interconnect circuits between boards.

Described herein are improved configurations for a resonator for wireless power transfer that includes a conductor forming one or more loops and having an inductance L, a network of capacitors, having a capacitance, C, and a desired electrical parameter, coupled to the conductor, the network having at least one capacitor of a first type with a first temperature profile of the electrical parameter, and the network having at least one capacitor of a second type with a second temperature profile of the electrical parameter.

A phased array antenna apparatus has a plurality of circuit portions which are each coupled to a respective antenna element. Capillary pressure of a cooling fluid within a wick in a loop is utilized to urge the fluid to travel around the loop, the wick being disposed in the region of the circuitry. In a variation, there are plural wicks in respective evaporators, and cooling fluid is distributed among the evaporators through a series of T-junctions. In another variation, cooling fluid is distributed to a plurality of evaporators in a sequence corresponding to a progressive increase in the respective amounts of heat accepted by the evaporators from structure being cooled.

A cooling apparatus (10) includes a housing defined by two aluminum parts (12, 13) which are brazed to each other. A plurality of sector-shaped recesses (21–28) are provided within the housing, and collectively define a chamber having a plurality of ribs (41–48) extending therethrough. Each recess contains a sector-shaped piece of porous material (17, 18), which is brazed to surfaces of the housing parts. The remaining space within the chamber is filled with a phase change material. Each of the ribs has therein a respective radially extending opening (101–108) which contains a heat pipe (141). Expansion accumulators (151) are mounted on the housing, and communicate with the chamber therein, in order to accommodate expansion of the phase change material within the chamber as the phase change material is heated.

An element support and thermal control arrangement for an active array antenna, preferably modular, using line-replaceable units (LRUs), includes a radiating-side liquid-cooled cold plate lying parallel with a liquid-cooled TR coldplate. Antenna elements are supported and cooled by the radiating cold plate, and a beamformer lies between the radiating and TR coldplates. A plurality of column coldplates are attached to the rear of the TR coldplate and define bays or volumes in which power LRUs can be fitted in thermal communication with the TR coldplate, the column coldplates, or both.

Thermal barrier coated RF radomes and a method for making the same are provided. In an embodiment of the disclosure, there is provided a method for making a thermal barrier coated radio frequency (RF) radome. The method comprises providing a radio frequency (RF) radome. The method further comprises applying a thermal barrier coating having a dielectric constant less than about 2.0 onto a surface of the radome to form a thermal barrier coated RF radome. The thermal barrier coating reduces a structure temperature of the radome by greater than 300 degrees Fahrenheit to enhance thermo-mechanical properties and performance of the RF radome.

An electronic device includes a housing including a first plate, a second plate opposite to the first plate, and a side member surrounding a space between the first plate and the second plate, and including at least part of a conductive material, a flexible printed circuit board (FPCB) attached on an inner surface of the housing, a first antenna element which is included in the FPCB and in which a slot is formed, and a first radio frequency integrated circuit (RFIC) for the first antenna element. An opening is formed in the side member or the second plate of the housing. The FPCB is attached the inner surface of the housing such that at least part in which the slot of the first antenna element is formed is exposed through the opening. At least part of the opening is filled with an insulating material.

According to one embodiment, an apparatus includes a fluid coolant and structure which reduces a pressure of the fluid coolant through a subambient pressure at which the coolant has a cooling temperature less than a temperature of the heat-generating structure. The apparatus also includes structure that directs a flow of the fluid coolant in the form of a liquid at a subambient pressure in a manner causing the liquid coolant to be brought into thermal communication with the heat-generating structure. The heat from the heat-generating structure causes the liquid coolant to boil and vaporize so that the coolant absorbs heat from the heat-generating structure as the coolant changes state. The structure is configured to circulate the fluid coolant through a flow loop while maintaining the pressure of the fluid coolant within a range having an upper bound less than ambient pressure. The apparatus also includes a first heat exchanger for exchanging heat between the fluid coolant flowing through the loop and a second coolant in an intermediary loop so as to condense the fluid coolant flowing through the loop to a liquid. The apparatus also includes a second heat exchanger for exchanging heat between the second coolant in the intermediary cooling loop and a body of water on which the ship is disposed.

According to one embodiment of the invention, a method is provided for cooling heat-generating structure disposed in an environment having an ambient pressure. The heat-generating structure includes electronics. The method includes providing a coolant, reducing a pressure of the coolant to a subambient pressure at which the coolant has a boiling temperature less than a temperature of the heat-generating structure, and bringing the heat-generating structure and the coolant at the subambient pressure into contact with one another, so that the coolant boils and vaporizes to thereby absorb heat from the heat-generating structure. In a more particular embodiment the coolant is either pure water or pure methanol with an electrical resistivity level of greater than one million Ohms-cm. Further, in another particular embodiment the method includes filtering the coolant to maintain its purity above a particular level.

An inventory control system and method that tracks inventories of items with RFID tags, includes a reader unit and an intelligent station that tracks RFID tags to determine item information of items to be inventoried. The reader unit transmits and receives RF signals. The intelligent station includes a first RF antenna connected to the reader unit by a first transmission cable through a first switch, and one or more additional RF antennae connected to the reader unit by the same first transmission cable through additional switches. An inventory control processing unit receives item information from the intelligent stations to update inventory information regarding the items to be inventoried.

In certain embodiments, a structure for electronic components includes a baseplate having a substantially planar shape. The baseplate defines one or more openings allowing air flow. The structure includes a frame coupled to the baseplate. The frame includes a planar support with a substantially planar shape that is substantially parallel to the baseplate. Then planar support and baseplate at least partially defines one or more plenums. The planar support is also configured to support one or more transmit / receive integrated microwave modules. The frame also includes a plurality of frame supports that define one or more channels for air flow. Each channel corresponds to one of the plenums. Additionally, the frame includes a ventilated panel with a surface defining a plurality of air inlets. The air inlets allow air into one of the one or more plenums. Also, the frame includes one or more thermal interfaces configured to dissipate heat.

A system for transmitting energy comprises a controller operably coupled to a plurality of energy transmitters. Each of the transmitters comprises a microwave generator, a waveguide positioned for receiving the beam of electromagnetic energy from the microwave generator, an antenna positioned for receiving the guided beam of electromagnetic energy, and a radome disposed about the antenna. The microwave generator is configured for emitting a beam of electromagnetic energy. The waveguide is configured for receiving the beam of electromagnetic energy and emitting a guided beam of electromagnetic energy. The antenna is configured for forming a directional beam of microwave energy with a controlled phase, and the directional beam of microwave energy has controlled energy distribution properties. The controller is configured for modulating at least one attribute of the directional beam of microwave energy of each energy transmitter of the plurality of energy transmitters.