Patent application number | Description | Published |
20090134951 | BROADBAND RECIPROCAL ACTIVE BALUN STRUCTURE - The present invention relates to the field of electronic devices known as baluns. It concerns an active balun which is broadband and reciprocal. Embodiments of the invention integrate an active splitter balun with an active combiner balun so as to form three transmission lines. A first active coupling is provided between the first and second transmission lines and a second active coupling is provided between the first and third transmission lines. The active couplings are provided by means of amplifier cells distributed along the transmission lines. Embodiments of the invention have configurable means for polarizing the different amplifier cells so as to create a specific coupling direction between the various transmission lines. The device according to the invention can be applied in the field of broadband mixers which are used, notably, in radio transmission and reception circuits. | 05-28-2009 |
20090286492 | RF SWITCH AND TRANSMIT AND RECEIVE MODULE COMPRISING SUCH A SWITCH - The present invention relates to a device for switching an RF signal. It also relates to a transmit and receive module comprising such a switch. The device includes at least one branch linking a first pole to a second pole, a branch comprising a conducting line coupled to a reference potential, it comprises at least one Gallium Nitride (GaN) semi-conductor elementary switch, for example a transistor, linking the line to the reference potential, the RF signal propagating along the line when the semi-conductor is driven to the on state. In the transmit and receive module, the device links the transmit pathway and the receive pathway to an antenna. The invention applies notably in transmit and receive modules of airborne systems operating in a broad band of frequencies or in a narrow band. | 11-19-2009 |
20100052788 | BROADBAND MICROWAVE DEVICE WITH SWITCHABLE GAIN - The invention relates to a broadband microwave device with switchable gain comprising a microwave signal input E and output S, a distributed amplifier with a plurality of amplifying cells comprising an input transmission line for an input signal applied to the microwave signal input E, said input transmission line having one of its two ends linked to the microwave signal input E, an output transmission line for said amplified input signal having an output end of the distributed amplifier, the cells of the distributed amplifier settable either to an amplifying state or to a blocked state. A switch switches the microwave signal output S either to a non-amplification position linked to the other end of the input transmission line, or to an amplification position linked to the output end of the distributed amplifier. A control unit supplies switch position control and amplifying cell status control signals. | 03-04-2010 |
20100052814 | Controlled RF Active Duplexer - A controlled RF active duplexer comprises two distributed amplifiers and means for controlling them. Each distributed amplifier comprises an input line and an output line, the output line of the first distributed amplifier being common to the input line of the second distributed amplifier. An end of the input line of the first distributed amplifier forms the input port, an end of the output line of the second distributed amplifier forms the output port and an end of the line common to the two distributed amplifiers forms the input/output port. The distributed amplifiers are placed in the on state or in the off state in opposition to one another as a function of the ports to be made to communicate. The invention makes it possible to carry out the splitting of the RF signals within a compact space and isolation between input port and output port. | 03-04-2010 |
Patent application number | Description | Published |
20100064552 | Ice crampon for mountaineering with adjustable front spike - An ice crampon comprises a metal armature composed of a horizontal support plate, at least one front spike in the form of a blade, and means for adjusting the length of said front spike between a withdrawn position and an advanced position. In the intermediate part, each front spike comprises two circular apertures for passage of a fixing screw in both the withdrawn and advanced positions, and in the rear part comprises a sliding link operating in conjunction with a positioning cross-member securedly attached to the armature when adjustment is performed. The sliding travel corresponds to the longitudinal distance between the two apertures, and the positioning cross-member is notched over its whole width with a succession of rectangular notches and indentations further enabling transverse positioning of the front spike. | 03-18-2010 |
20100122873 | Multifunctional belay device for a rope - A belay device for a rope, comprising a plate having at least one slot for a loop of the rope to pass through, a retaining element integral to the plate, and a carabiner connected to the retaining element by means of a securing part rendering it captive with respect to the plate. The carabiner is fitted with bidirectional sliding in the securing part to come up against the stop formed by the plate when blocking the rope or to move away from the latter when releasing is performed. | 05-20-2010 |
20100125984 | CARABINER WITH MOVING GATE IN THE FORM OF A WIRE - A carabiner equipped with a swivelling gate formed by a rigid metal wire of smaller diameter than that of the body. The wire is provided with a protuberance at one of the ends to form a male latching element and an articulation loop at the opposite end for passage of the swivel-pin. A flexible return device for returning the gate to the closed position comprises a compression spring operating in conjunction with an intermediate transfer stirrup inside a housing of the body. | 05-27-2010 |
20100205813 | ICE-AXE SHAFT EQUIPPED WITH A GRIP WITH AN ADJUSTABLE FINGER BRACE - An ice-axe gripping shaft comprising a grip made from plastic material, equipped with a stop for the user's hand to rest against, and an intermediate finger brace for positioning the user's finger, Adjustment means of the finger brace comprise a locking lever articulated on the finger brace, and a plurality of notches staggered at regular intervals along a positioning zone to form a rack. The locking lever is equipped with a cam designed to engage in the locked position in one of the notches to immobilize the finger brace in a predefined adjustment position. | 08-19-2010 |