Quotables
"The wireless music box has no imaginable commercial value. Who would pay for a message sent to nobody in particular?"
David Sarnoff, American radio pioneer ; 1921
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| Number | Title | Issue Date |
| 7411470 | Controlling coupling strength in electromagnetic bus coupling A controller sends signals to an electromagnetic coupler associated with a bus. The signals are arranged to set a coupling strength of the coupler. ... | 08/12/2008 |
| 7362033 | Surface-acoustic-wave device A surface-acoustic-wave device includes a piezoelectric substrate and first and second comb-shaped electrodes each having a bus-bar portion parallel to a propagation direction of a surface acoustic wave in the substrate. Respective electrode fingers are periodically... | 04/22/2008 |
| 7339366 | Directional coupler for a accurate power detection A power detection system implemented using a pair of directional couplers and a transmission line (or equivalent) disposed between the directional couplers, wherein the transmission line (or equivalent) provides a 90° phase shift between the directional couplers. A... | 03/04/2008 |
| 7307492 | Design, layout and method of manufacture for a circuit that taps a differential signal An apparatus that includes a first conducting strip having a narrowed width where the first conducting strip also acts as a first electrode for a first tapping capacitance. The first tapping capacitance has a second electrode that is: 1) parallel to the first conduc... | 12/11/2007 |
| 7283020 | Signal extracting arrangement A base station in a mobile communication network, includes at least one transmission line for transmitting a radio frequency signal. Each transmission line includes a coupling hole. A two-port coupled line includes one or more coupling holes. Each transmission line ... | 10/16/2007 |
| 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 |
| 7233299 | Multiple-beam antenna with photonic bandgap material A system includes a device for focusing electromagnetic waves, and a multiple-beam antenna. The antenna includes: a photonic bandgap material (20) having at least one band gap, at least one periodicity defect (36) of the photonic bandgap material so as... | 06/19/2007 |
| 7221239 | Variable power divider A variable power divider and method can vary the RF power between ports in a high power and multi-carrier RF environment, such as is used in controlling signals sent and received in a base station antenna. The variable power divider can include a single-control phas... | 05/22/2007 |
| 7212077 | Device for transmitting signals between movable units A device for signal transmission between units that are movable along given tracks comprises at least one transmitter for generating electrical signals, at least one conductor arrangement for conducting the electrical signals along a track of movement, and at least ... | 05/01/2007 |
| 7183876 | Variable coupling factor directional coupler A variable coupling factor directional coupler having a variable aperture positioned between a transmission line section and a coupling conductor connected at either end to a center conductor of a pair of connectors. The coupling factor of an RF signal in the transm... | 02/27/2007 |
| 7172813 | Zinc oxide crystal growth substrate A zinc oxide crystal growth substrate is disclosed. The zinc oxide crystal growth substrate includes a thin layer of single crystal zinc oxide deposited on an self supporting substrate surface by a chemical deposition process. The chemical deposition process is sele... | 02/06/2007 |
| 7173791 | Ferroelectric device including a unit element having a topological outline in a C-shape or a S-shape A unit element of a magnetic device or a ferroelectric device and magnetic particles of a magnetic recording medium are provided. The outline of the unit element and the magnetic particles is arranged so as to have a portion topologically identical to one of a lette... | 02/06/2007 |
| 7151422 | 90° hybrid A 90° hybrid for splitting or interconnecting radio frequency power includes four gate connections, capacitances and inductances for electric capacitive coupling and magnetic inductive coupling, an arrangement of strip conductors that are disposed approximately par... | 12/19/2006 |
| 7138887 | Coupler with lateral extension A coupler is disclosed that includes first and second mutually coupled spirals or loops disposed on opposite sides of a dielectric substrate. The substrate may be formed of one or more layers and the loops may have a number of turns appropriate for a given applicati... | 11/21/2006 |
| 7127808 | Spiral couplers manufactured by etching and fusion bonding A microwave circuit utilizes a spiral-like coupler configuration to achieve the functionality of a traditional coupler with higher density and lower volume. A plurality of substrate layers having metal layers disposed on them are bonded to form the package. A plural... | 10/31/2006 |
| 7126437 | Bus signaling through electromagnetic couplers having different coupling strengths at different locations Electromagnetic coupling locations are provided along a bus. Devices can be respectively coupled at the locations for communication on the bus. Electromagnetic coupling strengths associated with at least some coupling locations are caused to have different, selected... | 10/24/2006 |
| 7119633 | Compensated interdigitated coupler A coupler may include four ports, and first and second sets of conductive strips. Each set of conductive strips may include a plurality of interconnected conductive strips connected between two ports. Each conductive strip of the first set may be electromagnetically... | 10/10/2006 |
| 7109819 | Device for wideband electrical connection of two units that are movable relative to each other A device for signal transmission between units which are movable relative to each other along predetermined paths comprises at least one transmitter associated with a first unit for generating electrical signals, at least one conductor arrangement associated with th... | 09/19/2006 |
| 7098756 | Arrangement and method for combining electric signals The invention relates to an arrangement and method for combining electric signals. The arrangement comprises: an antenna element (270) for receiving first electric signals from the environment; a receiver cable (210) in connection with the antenna elem... | 08/29/2006 |
| 7091804 | Rotary joint The present invention aims at providing a rotary joint which is of a thin type and has broad band characteristics and which is low in loss and is excellent in power resistance as well. In order to attain the object, the rotary joint includes: first and second polari... | 08/15/2006 |
| 7088198 | Controlling coupling strength in electromagnetic bus coupling A controller sends signals to an electromagnetic coupler associated with a bus. The signals are arranged to set a coupling strength of the coupler. ... | 08/08/2006 |
| 7085872 | High frequency bus system A high frequency bus system which insures uniform arrival times of high-fidelity signals to the devices on the high frequency bus, despite the use of the bus on modules and connectors. A high frequency bus system includes a first bus segment having one or more devic... | 08/01/2006 |
| 7042309 | Phase inverter and coupler assembly A circuit assembly may include one or more coupler sections, and may include a phase inverter and/or a phase shifter. A coupler section may include a phase inverter. A coupler may include first and second mutually coupled spirals disposed on opposite sides of a diel... | 05/09/2006 |
| 7030713 | Miniature high performance coupler A coupler that has a small package size and is adjustable after manufacturing. A coupler has a substrate with several dielectric layers and a top and bottom surface. A ground plane is located on the top surface and another ground plane is located on the bottom surfa... | 04/18/2006 |
| 7015771 | Directional coupler A directional coupler uses non-metallic slotted spacers at the edges of a pair of coupled lines. The spacers are adjustable in their vertical position and thereby provide continuous coupling fine-adjustment. The spatial relationship between the coupled lines is ther... | 03/21/2006 |
| 6972639 | Bi-level coupler A coupler is disclosed that includes first and second mutually coupled spirals disposed On opposite sides of a dielectric substrate. The substrate may be formed of one or more layers and the coils may have a number of turns appropriate for a given application. Condu... | 12/06/2005 |
| 6951321 | Efficient cargo liner installation An apparatus and method for lining a cargo hold, and an aircraft cargo hold so lined are provided. A plurality of liner panels have formed edges angling away from facing sides of the liner panels. A mounting channel mounted on a supporting structure has an opening f... | 10/04/2005 |
| 6920334 | Method and apparatus for providing gain control feedback in RF amplifiers Methods and apparatus for providing gain control feedback in rf amplifiers in such transmitting devices as cell phones. In a cell phone application, the transmit level is set by the base station. In the cell phone, the transmit level received from the base station i... | 07/19/2005 |
| 6903625 | Microstrip RF signal combiner A microwave signal combiner having a dielectric board with a main line on one surface and a plurality of cascaded input lines on a second, and opposite surface. The second surface includes a ground plane while the first surface is devoid of any ground plane. The com... | 06/07/2005 |
| 6882244 | Switching system for broadcast transmission An apparatus directs two high-power UHF transmitter signals to one or the other or a combination of output destinations as determined by the setting of control components. Redirection between outputs can be performed continuously under full power. Using the apparatu... | 04/19/2005 |
| 6825737 | Device for broadband electrical signal transmission using a bi-directional transmission system An arrangement for broadband signal or energy transmission between at least two units mobile relative to each other along an optional trajectory, comprising a first unit with a symmetric open conductor structure consisting of a plurality of dummy elements that are t... | 11/30/2004 |
| 6788165 | Variable power divider A variable power divider and method can vary the RF power between ports in a high power and multi-carrier RF environment, such as is used in controlling signals sent and received in a base station antenna. The variable power divider can include a single-control phas... | 09/07/2004 |
| 6737934 | Directional Coupler, antenna device, and transmitting-receiving device A first transmission line and a second transmission line are caused to be partially opposite to each other, and by use of the opposite portions of the first transmission line and the second transmission line, the first transmission line and the second transmission l... | 05/18/2004 |
| 6624722 | Coplanar directional coupler for hybrid geometry A microwave coupler has a planar form with a transmission line segment oriented at an angle relative to a main transmission line. The planar form of the transmission line, such as in a printed circuit board, helps reduce the size and manufacturing costs f... | 09/23/2003 |
| 6476614 | Detector for detecting frequencies in more than one band A detector detects frequencies in two predetermined bands separately with respective predetermined coupling. The detector includes a first transmission line, and second and third transmission lines and disposed near the first transmission line. One end of... | 11/05/2002 |
| 6441699 | Directional coupler, antenna device, and transmitting-receiving device A first transmission line and a second transmission line are caused to be partially opposite to each other, and by use of the opposite portions of the first transmission line and the second transmission line, the first transmission line and the second tra... | 08/27/2002 |
| 6359530 | Switching waveguide directional coupler and method A switchable directional coupler in which a three position switch partitions the coupler into three distinct coupling paths among its four ports according to the status of a pair of quadrature phase input signals of amplitudes A and B. In one position wit... | 03/19/2002 |
| 6335662 | Ferroelectric-tunable microwave branching couplers The invention discloses the utilization of various transmission lines that entail a ferroelectric material as dielectric substrate to introduce an impedance shift by means of an externally applied d.c. bias, which alters the effective length between the i... | 01/01/2002 |
| 6320477 | Adjustable off-center coaxial coupler An energy coupler (10) includes a movably adjustable energy coupling sleeve (16), and a coupling transmission line (18) operatively coupled to the movably adjustable energy coupling sleeve (16) to provide adjustable coefficient coupling with a transmissio... | 11/20/2001 |
| 6285266 | Directional coupler having shiftable parallel dielectric transmission lines A first transmission line and a second transmission line are caused to be partially opposite to each other, and by use of the opposite portions of the first transmission line and the second transmission line, the first transmission line and the second tra... | 09/04/2001 |
