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"Transmission of documents via telephone wires is possible in principle, but the apparatus required is so expensive that it will never become a practical proposition."
Dennis Gabor, British physicist
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| Number | Title | Issue Date |
| 8125295 | Orthogonal-mode coupler of the coaxial type having a branched central conductor The present invention relates to an orthogonal-mode junction coupler with an ultrabroad bandwidth or a wavelength waveguide noteworthy in that it includes what is called an external conductor (8) comprising a cavity (9) in which a central conductor ( | 02/28/2012 |
| 8125294 | Orthogonal-mode junction coupler having a dipole radiating structure and method of coupling Orthogonal-mode junction coupler with a medium to broad bandwidth for a waveguide (1) operating at a wavelength λ, characterized in that it includes a connector (5) projecting from the waveguide (1) and extending between a short circuit (3 | 02/28/2012 |
| 8125293 | Communication system using differential two-wire type of communication line A communication system includes a network, plural nodes, and a reducer. The network includes a main line and a plurality of branch lines branched from the main line respectively, the main line and each of the branch lines being respectively formed into a differentia... | 02/28/2012 |
| 8081046 | Ortho-mode transducer with opposing branch waveguides There is disclosed an ortho-mode transducer fabricated as a single piece. The ortho-mode transducer may include a first surface having an aperture defining a common port, a second surface having an aperture defining a vertical port, and a third surface having an ape... | 12/20/2011 |
| 8049576 | Method for pseudo-differential transmission using modal electrical variables The invention relates to a method and a device for pseudo-differential transmission in interconnections used for sending a plurality of electrical signals. The ends of an interconnection having 4 transmission conductors and a return conductor distinct from th... | 11/01/2011 |
| 8040204 | Radio frequency combiners/splitters Disclosed is a radio-frequency divider comprising: an input port; and two output ports, separated by a bridge bar, wherein the divider is arranged in microstrip form and the microstrip structure takes the form of a generally tapering section connecting the input por... | 10/18/2011 |
| 8031032 | Microwave combiner/splitter A power amplifier (power amplifier) having multiple solid state sub-amplifiers connected in parallel between the power amplifier input and the power amplifier output are described. The signal input to the power amplifier is provided to an RF splitter connected betwe... | 10/04/2011 |
| 8013687 | Ortho-mode transducer with TEM probe for coaxial waveguide An ortho-mode transducer may include an annular common waveguide defined by an outside surface of an inner conductor and an inside surface of an outer conductor, the outside surface and the inside surface concentric about a waveguide axis. A first port may couple a ... | 09/06/2011 |
| 7821356 | Ortho-mode transducer for coaxial waveguide There is disclosed an ortho-mode transducer. An annular common waveguide may be defined by an outside surface of an inner conductor and an inside surface of an outer conductor, the outside surface and the inside surface concentric about a waveguide axis. A first por... | 10/26/2010 |
| 7777591 | Variable power coupling device Systems and methods for a coupling device are shown. In various embodiments, a variable frequency divider comprises a first transmission line and a second transmission line. The first transmission line may comprise a first and a second end. The first end may compris... | 08/17/2010 |
| 7710218 | Variable power coupling device Systems and methods for a coupling device are shown. In various embodiments, a variable frequency divider comprises a first transmission line and a second transmission line. The first transmission line may comprise a first and a second end. The first end may compris... | 05/04/2010 |
| 7671703 | Coaxial orthomode transducer A coaxial orthomode transducer with improved port to port isolation, low higher order mode (“HOM”) coupling, and low transverse electromagnetic mode (“TEM”) coupling is disclosed. ... | 03/02/2010 |
| 7663449 | Divider/combiner with coupled section A divider may include a stem or first port, and two or more branch ports connected or coupled directly or indirectly to the first port. As mentioned, a divider may include multiple sections. In some examples, a divider may include at least an inductively uncoupled s... | 02/16/2010 |
| 7646262 | High speed wideband differential signal distribution An exemplary device that operates as a differential splitter includes a plurality of differential signal conductors. Each of the conductors is coupled to at least one other of the conductors by a connector and a resistor. The coupled conductors are impedance matched... | 01/12/2010 |
| 7573353 | Circuit topology for multiple loads A circuit topology for multiple loads includes a driving terminal, a first node coupled to the driving terminal via a main transmission line, a second node coupled to the first node via a first branch transmission line, a first receiving terminal coupled to the firs... | 08/11/2009 |
| 7535317 | Coaxial characteristic-impedance transformer having concentric quarter wavelength lines configured as a power divider A coaxial characteristic-impedance transformer for dividing RF power on a first terminal onto n second terminals situated in the same radial plane by multi-stage serial transformation via λ/4 lines is provided with a short overall size, where the λ/4 lines between... | 05/19/2009 |
| 7532089 | Microwave combiner/splitter A power amplifier (power amplifier) having multiple solid state sub-amplifiers connected in parallel between the power amplifier input and the power amplifier output are described. The signal input to the power amplifier is provided to an RF splitter connected betwe... | 05/12/2009 |
| 7518468 | Power divider-combiner circuit A power distribution and combination circuit for distributing a signal input from a first port to a second and third ports and combining signals input from the second and the third port so as to be outputted to the first port. A transmission line of the power distri... | 04/14/2009 |
| 7446627 | Compact stabilized full-band power amplifier arrangement High frequency power amplification modules comprise a dielectric substrate supporting a stepped impedance transition coupled to the input of a power amplifier and a symmetrically disposed stepped impedance transition connected to the output of the power amplifier. T... | 11/04/2008 |
| 7443266 | Variable power coupling device An apparatus and method for providing adaptive control of the output of a radio frequency coupler. Adaptive control may include providing a transmission line having a plurality of branches extending therefrom and terminating, correspondingly, with a plurality of ter... | 10/28/2008 |
| 7411472 | Low-loss integrated waveguide feed for wafer-scale heterogeneous layered active electronically scanned array A wafer-scale heterogeneous layered active electronically scanned array (ESA) utilizes a low-loss integrated waveguide feed. The ESA is formed from wafer-scale subarray modules each of which comprises a multilayer stack to form transmit/receive (T/R) modules. Wavegu... | 08/12/2008 |
| 7400215 | Method and apparatus for increasing performance in a waveguide-based spatial power combiner A power combining array and method of increasing performance in a power combining array includes a waveguide enclosure having a plurality of slotline modules disposed therein. The slotline modules include input and output antennas that have varying physical characte... | 07/15/2008 |
| 7388452 | Integrated branching network system and joint connector A network system is provided with a joint connector for branching a communication line to plural lines respectively linked with plural nodes, the joint connector is provided with terminals for respectively linking with plural nodes, and circuits respectively having ... | 06/17/2008 |
| 7385462 | Wideband radial power combiner/divider fed by a mode transducer A radial power combiner/divider capable of a higher order (for example, N=24) of power combining/dividing and a 15% bandwidth (31 to 36 GHz). The radial power combiner/divider generally comprises an axially-oriented mode transducer coupled to a radial base. The mode... | 06/10/2008 |
| 7369011 | High order mode electromagnetic wave coupler and coupling method using proportional distributing waves The high order mode electromagnetic wave coupler and coupling method uses one or more Y-shaped bifurcated waveguides to divide the wave to one or more order, so as to divide the target electromagnetic wave proportionally into equal shares. The waveguide is used to i... | 05/06/2008 |
| 7358604 | Multichip circuit module and method for the production thereof A multichip circuit module includes a main board, at least one carrier substrate mounted on and in electrical contact with the main board, and at least one semiconductor chip arranged on the carrier substrate and in electrical contact therewith. The carrier substrat... | 04/15/2008 |
| 7342467 | Variable power coupling device An apparatus and method for providing adaptive control of the output of a radio frequency coupler. A plurality of input signals is provided to a multi-prong divider/combiner, the divider/combiner having a first and a second input terminals communicating a first and ... | 03/11/2008 |
| 7324060 | Power divider having unequal power division and antenna array feed network using such unequal power dividers An RF power divider circuit unequally divides an input signal into first and second signal components of unequal power. The circuit includes a single input port, first and second output ports, and a combination of a plurality of quarter wave transformers and a plura... | 01/29/2008 |
| 7312673 | Radial power divider/combiner A radial power divider-combiner is disclosed. The divider-combiner includes a divider and a combiner. An input signal is provided to a transmission antenna that radiates the input signal inside the divider. Within the divider, the input signal is divided into a plur... | 12/25/2007 |
| 7292121 | RF combining device and method Two or more reflective isolator elements are joined at their outputs to produce an RF combining structure. An RF circulator element is used for each input RF signal as a reflective isolator element to provide a different phase delay according to the direction of pro... | 11/06/2007 |
| 7280080 | Multiple beam feed assembly A multi-beam feed assembly having a feed assembly housing with a plurality of input waveguide(s) formed in a front face. The housing may be adapted for manufacture via die casting. The housing also having at least two PCB mounting surface(s), a plurality of probe ap... | 10/09/2007 |
| 7280602 | Microwave signal edge detector circuit for improved clock recovery A signal edge detector circuit is described for the detecting the signal transitions in a stream of microwave signals at a predetermined clock signal rate, particularly for OC-768 data streams. Selected transmission lines in the signal edge detector circuit reflect ... | 10/09/2007 |
| 7274583 | Memory system having multi-terminated multi-drop bus Provided is a memory system having a multi-drop bus structure. The memory system includes a bus, a memory controller in which a port connected to the bus is terminated by a resistor having a first impedance value, a connector connected to a point having the first im... | 09/25/2007 |
| 7271680 | Method, apparatus, and system for parallel plate mode radial pattern signaling A method, system, and apparatus for high data rate parallel plate mode signaling. ... | 09/18/2007 |
| 7259640 | Miniature RF and microwave components and methods for fabricating such components RF and microwave radiation directing or controlling components are provided that may be monolithic, that may be formed from a plurality of electrodeposition operations and/or from a plurality of deposited layers of material, that may include switches, inductors, ant... | 08/21/2007 |
| 7256665 | Apparatus and method for in-process high power variable power division A power divider for a waveguide between a single electromagnetic microwave generator input and two output ports, the divider including two tuner networks, each comprising a moveable capacitive probe with a pair of fixed flanking inductive posts. ... | 08/14/2007 |
| 7253701 | Multiplexed amplifier Multiple sensor signals are used to modulate an equal number of frequency-spaced carrier signals in a directional parametric upconverting amplifier. Basically, the carrier signals are separated in a cascaded or parallel configuration of narrow frequency passbands, w... | 08/07/2007 |
| 7248129 | Microstrip directional coupler A microwave directional coupler includes a microstrip conductor formed on a dielectric substrate and forming a main transmission line having in and out ports that receive signals to be coupled. A substantially U-shaped microstrip conductor is formed over the dielect... | 07/24/2007 |
| 7245192 | Coupler with edge and broadside coupled sections Couplers are disclosed that include first and second mutually coupled conductors. The coupled conductors may be regular or irregular in configuration, and for example, may be linear, including rectilinear or with one or more curves, bends or turns, such as forming a... | 07/17/2007 |
| 7242266 | Distributed interconnect A distributed interconnect and a method is provided for interconnecting electrical components which minimizes coupling inductance and increases bandwidth. The interconnect includes a transmission line with a first and second conductive transmission element. The firs... | 07/10/2007 |
