摘要:
This invention relates to mechanisms for steering or pointing transmitted optical radiation beams and/or the look directions from which optical radiation beams are received. It also relates to optical communications systems incorporating such mechanisms, more particularly but not exclusively interspacecraft communications systems.
摘要:
A satellite antenna arrangement for a satellite communication system comprising: a reflector for producing a far field pattern with near-zero field strength at a predetermined location to reject unwanted signals from said predetermined location or minimise signal power transmitted to said predetermined location, the reflector having a surface comprising a stepped profile arranged to generate the near-zero field strength in the predetermined location. The stepped profile may comprise a radial step. The location of the near-zero field strength can be steered by moving the reflector or by adjusting the amplitude and phase of an additional beam that covers substantially the same region as the main beam reflected by the reflector.
摘要:
A satellite antenna arrangement for a satellite communication system comprising: a reflector for producing a far field pattern with near-zero field strength at a predetermined location to reject unwanted signals from said predetermined location or minimize signal power transmitted to said predetermined location, the reflector having a surface comprising a stepped profile arranged to generate the near-zero field strength in the predetermined location. The stepped profile may comprise a radial step. The location of the near-zero field strength can be steered by moving the reflector or by adjusting the amplitude and phase of an additional beam that covers substantially the same region as the main beam reflected by the reflector.
摘要:
A thermal ablation system comprises a fluid handling unit receiving fluid from a fluid source at a first pressure, the fluid handling unit including a heater heating the fluid to a desired temperature and a pump and an introducer including a sheath which, when in an operative position, is received within a hollow organ, the sheath including a delivery lumen introducing fluid heated by the heater to the hollow organ and a return lumen withdrawing fluid from the hollow organ and returning the withdrawn fluid to the console via a return lumen, wherein the pump increases a pressure of the fluid between the fluid source and the delivery lumen of the introducer.
摘要:
A system for ablating tissue includes a reusable control unit including a processor monitoring and controlling ablation and a control interface receiving input to and output from the processor in combination with a disposable procedure set releasably connectable to the control unit to couple to the control interface for communication with the processor.
摘要:
A thermal ablation system comprises a fluid handling unit receiving fluid from a fluid source at a first pressure, the fluid handling unit including a heater heating the fluid to a desired temperature and a pump and an introducer including a sheath which, when in an operative position, is received within a hollow organ, the sheath including a delivery lumen introducing fluid heated by the heater to the hollow organ and a return lumen withdrawing fluid from the hollow organ and returning the withdrawn fluid to the console via a return lumen, wherein the pump increases a pressure of the fluid between the fluid source and the delivery lumen of the introducer.
摘要:
A device for accessing a hollow organ comprises an elongated body sized for insertion into an opening into a hollow organ, the elongated body including a working channel extending therethrough from a proximal opening which, when the seal is in an operative position, is located proximally of the opening to a distal opening which, when the seal is in the operative position, opens into the hollow organ and a seal extending around a portion of the elongated body between the proximal and distal openings, the seal expanding from an insertion configuration to a sealing configuration.
摘要:
The present invention relates to an identification element having an integrated circuit and an antenna coil connected to the integrated circuit. The antenna coil comprises a lower conducting track and an upper conducting track. Each track includes a plurality of turns, with the two tracks being arranged on either side of a dielectric layer. The relative position of the two tracks is such that they overlap substantially only in one selected area or in two selected areas.
摘要:
The present invention is directed to a printer having a device for printing a data carrier. It is proposed providing the data carrier with at least one transponder chip and equipping the printer with a device for driving the transponder chip. This makes it possible to print the data carrier simultaneously or sequentially and to write data into, or read data out of, the transponder chip.