Wave transmission lines and networks inventions 10/06

20060238268 - Random beamforming method for a mimo system: A transmission method based on random beamforming. A base station receives, from mobile stations, feedback information including channel-by-channel transmission rates for a weight vector arbitrarily set by the base station. The base station compares transmission rates of identical channels received from the mobile stations. The base station allocates an associated...

20060238269 - Reflection loss suppression circuit: An object is to suppress a reflection loss in any desired frequency band outside a required band, without affecting circuit characteristics in the required frequency band. The output impedance of a circuit in a specified frequency band is transformed into a high impedance by a transmission line 15. A resistance...

20060238270 - Wideband attenuator circuits an methods: Embodiments of the present invention include wideband attenuator circuits and methods. In one embodiment the present invention includes a first divider circuit coupled in series with two or more second divider circuits. The divider circuits include resistance and capacitance values that may be set according to particular relationships. In one...

20060238271 - Low temperature co-fired ceramic 90 degree power splitter: A power splitter that has a small package size and good electrical performance at frequencies less than 1 GHz. The power splitter includes a low temperature co-fired ceramic substrate that has several layers. A pair of transformers are formed by circuit lines that are interleaved on alternate layers. The circuit...

20060238272 - Filter and duplexer: A filter includes a filter chip, a laminated portion on which the filter chip is mounted, an input/output terminal provided in the laminated portion, a first U-shaped line pattern provided on a first layer and coupled to the filter chip, the first layer being included in the laminated portion between...

20060238273 - Common mode choke coil: A common mode choke coil has a first coil element and a second coil element. The first coil element is configured of a first coil pattern and a second coil pattern. Each of the first and second coil patterns has two ends and is spiral-shaped therebetween. The spirals of the...

20060238274 - Surface acoustic wave device: A SAW device includes: a SAW chip having a piezoelectric substrate and transmitting and receiving transducers; a circuit board formed with conductive inner contacts, each of which is connected electrically to a respective one of the transmitting and receiving transducers; a first adhesive-confining curb interconnecting the circuit board and the...

20060238275 - Block filter: The present invention relates to a method of constructing a microwave filter (1, 10) comprising a plurality of coupled resonators (2) and to a microwave filter manufactured by the method. A microwave filter (1, 10) is constructed by providing a plurality of individual resonators (2) and mechanically connecting the plurality...

20060238276 - Slotted dielectric resonators and circuits with slotted dielectric resonators: In accordance with the principles of the present invention, a resonator puck is provided with one or more vertical and/or horizontal, radial slits that improve the quality factor, Q, of circuits constructed from the resonators. In some embodiments of the invention, the surfaces of the resonators that define the slit...

20060238277 - Phase change control devices and circuits for guiding electromagnetic waves employing phase change control devices: A circuit for guiding electromagnetic waves includes a substrate for supporting components of the circuit. The circuit includes a control device which includes a first conductive element on the substrate for connection to a first component of the circuit and a second conductive element on the substrate for connection to...

20060232353 - Latching ferrite waveguide circulator without e-plane air gaps: An apparatus, system, and method of and for a microwave circulator. The apparatus, system, and method includes a non-reciprocal element for coupling microwaves from an input port to at least one output port, wherein the non-reciprocal element is capable of isolating at least one of the at least one output...

20060232354 - Variable reluctance ferrite core: A device, system, and method for suppressing electromagnetic interference (EMI). In one embodiment, an EMI suppression device includes a compound ferrite core having an inner ferrite core and an outer ferrite core. The inner core includes a through hole in which a conductor may be mounted, and the outer core...

20060232355 - Transmission line transformer: A transmission line transformer is disclosed. The transformer improves efficiency and a dynamic range of a power amplifier. The transformer is formed to have a plurality of load impedances as the primary side of the transmission line transformer is separated to form a plurality of primary transmission lines with parasitic...

20060232356 - Temperature and frequency equalizer: The present invention is an absorptive-type cable temperature and frequency equalizer that offsets changes in the gain of the other circuit components cables with increases in temperature and/or frequency. The equalizer comprises a temperature variable filter network having component values and a temperature coefficient of resistance that vary over temperature...

20060232357 - Temperature and frequency variable gain attenuator: A temperature and frequency variable gain attenuator comprises a temperature variable attenuator and a temperature variable filter network whose resistances changed to c generate different responses that vary over temperature and frequency. At least three different thick film thermistors are used, with two of these used on the attenuator and...

20060232358 - Antenna switch with adaptive filter: An antenna switch (31) that is arranged to alternately operate in a receive mode and a transmit mode, comprises adaptive filter (30). Herewith, signal processing means (Rx1, Rx2 and Rx3) can be coupled to an antenna (1) during the receive mode and be insulated from the antenna during the transmit...

20060232359 - Quadrature hybrid circuit: Four variable reactance means (10-13) are connected, respectively, to the four ports (1-4) of a quadrature hybrid circuit which is composed of four ring-linked two-port circuits (180-183) each composed of a transmission line or multiple lumped reactance elements, so that by changing the reactance values of the four variable reactance...

20060232360 - Waveguide frequency-band/polarization splitter: The invention proposes an optimized solution of a frequency/polarization splifter that requires no adjustment after production and can be produced entirely by moulding. The polarized-wave splitter comprises various components, including a polarization splitter 1 coupled to two filters 3 and 5 via transition regions 2 and 4. The overall dimensions...

20060232361 - Acoustically coupled resonators and method of making the same: An apparatus includes a substrate with a cavity and a two-stage resonator filter fabricated over the cavity. The two-stage resonator filter includes a first stage and a second stage. The first stage includes a first resonator and a second resonator, the second resonator acoustically coupled to the first resonator. The...

20060232362 - Resonator matching network: An input-matching network including an acoustic resonator providing a virtual impedance to match impedance between a first component and second component. As an example, the first component may be an antenna and the second component may be an amplifier. The acoustic resonator provides a virtual impedance to match impedance between...

20060232363 - Radio frequency filter systems and methods: Systems and methods are disclosed herein to provide filters for radio frequency applications. For example, in accordance with an embodiment of the present invention, a radio frequency filter includes a first dielectric layer having a first dielectric constant and a second dielectric layer having a second dielectric constant and disposed...

20060232364 - Coupled resonator filters formed by micromachining: A resonator filter assembly is provided having a first wafer (102), a second wafer (104) and a third wafer (106). A plurality of pits are etched in the first and second wafer (102, 104) and arranged such that a plurality of resonant cavities (108) are formed with a coupling cavity...

20060226926 - A ferro magnetic metal-insulator multilayer radio frequency circulator: A directional R.F. circulator directs radio frequency signals without an external biasing magnetic field. Layers of ferromagnetic materials and insulating materials form a laminated nano-structure. The layers are selected to have a thickness smaller than the wavelength of the radio frequency signals, and smaller than the skin depth of the...

20060226924 - Multi-channel circulator/isolator apparatus and method: A multi-channel circulator or isolator well suited for use in phased array antennas or other RF devices where space and packaging constraints make the implementation of a conventional circular or isolator difficult or impossible. The multi-channel circulator/isolator can be configured as an isolator by the inclusion of one or more...

20060226925 - Non-reciprocal circuit device: m

20060226927 - Method of terminating bus,bus termination resistor and wiring subtrate having terminated buses and method of its manufacture: A terminal resistor is provided at the end of a bus formed on a wiring substrate. An insulator having a large dielectric loss angle is provided in the vicinity of the terminal resistor to absorb high frequency electromagnetic waves in the vicinity. This arrangement permits successful transmission of digital signals...

20060226928 - Ball coax interconnect: A pseudo-coaxial vertical transition (10) includes a substrate (16). A bump array is disposed in a substantially concentric bump pattern upon the substrate (16) for simulating a pseudo-coaxial vertical electromagnetic wave propagation. The bump array is formed from a centrally disposed bump (32) having a predetermined bump diameter, and a...

20060226929 - Tunable microwave devices with auto-adjusting matching circuit: An embodiment of the present invention provides a power amplifier, comprising tunable impedance matching circuit including a plurality of tunable dielectric varactors and a DC voltage source interface capable of providing voltage to said plurality of saud tunable dielectric varactors....

20060226930 - Impedance-matching coupler: An impedance-matching coupler (1) comprises a dielectric substrate (10) onto which a conducting strip (12) is disposed. A dielectric layer (14), preferably a dielectric film, is formed on top of the conducting strip and the first dielectric layer to encircle the conducting strip. A metallic layer (16, 18) is finally...

20060226931 - Orthomode transducer: A waveguide orthomode transducer. In a first layer a turnstile junction having a main waveguide and four waveguide ports, and four hybrid tees each have an e-port, two opposed side-ports, and an h-port. The hybrid tees are ring-arranged around the turnstile junction so the waveguide ports each communicate with one...

20060226932 - Acoustic resonator performance enhancement using filled recessed region: An acoustic resonator that includes a substrate, a first electrode, a layer of piezoelectric material, a second electrode, and a fill region. The first electrode is adjacent the substrate, and the first electrode has an outer perimeter. The piezoelectric layer is adjacent the first electrode. The second electrode is adjacent...

20060226933 - Surface acoustic wave filter: A surface acoustic wave filter (cascaded dual mode SAW filter) includes three IDT electrodes disposed adjacent to each other along the propagation direction of a surface wave on a piezoelectric substrate and two primary-tertiary longitudinally-coupled dual mode SAW fliers cascaded and constructed by arranging grating reflectors on both sides of...

20060220760 - Ultra-broadband integrated balun: An ultra-broadband balun is provided. The balun comprises: a first unbalanced transmission line comprising a first ground trace and a signal trace; and a balanced transmission line comprising a first and second signal trace, wherein the first signal trace of the balanced transmission line is connected to the first ground...

20060220761 - Distributed constant circuit and impedance adjustment method: According to a conventional art, a large number of adjustment pads are necessary if impedance mismatching is large or characteristic impedance is low. Such a large number of the adjustment pads needs to secure a large area for arrangement of the adjustment pads preliminarily. However, occupation of a large area...

20060220762 - Pulse transport apparatus, systems, and methods: Apparatus and systems, as well as methods and articles, may operate to transmit an initial pulse to a directional coupler, where the initial pulse has an initial amplitude and a timed overshoot of a selected duration. Further activities may include stepping down the initial amplitude to an amplitude approximately equal...

20060220763 - Acoustic mirror type thin film bulk acoustic resonator, and filter, duplexer and communication apparatus comprising the same: A thin film bulk acoustic resonator (507b) comprises a substrate (101b), an acoustic mirror layer (508b) provided on the substrate (101b), including a plurality of impedance layers (502b, 503b) alternatively having a high acoustic impedance and a low acoustic impedance, and a piezoelectric thin film vibrator (509b) provided on the...

20060220764 - Method of manufacturing surface acoustic wave device which prevents sticking of foreign matters: According to the method of manufacturing a surface acoustic wave device of the invention, since a conductor layer is formed on electrode sections in a state where the entire regions of inter digital transducer and reflectors are covered with an insulating film, the inter digital transducer and the reflectors are...

20060220765 - Microwave band-pass filter: The present invention relates to a microwave band-pass filter comprising a plurality of coupled resonators including at least one coaxial resonator (1). For suppression of higher order or spurious pass-bands the filter is characterised in that a central hole (9) extends from the upper end of the inner conductor (6)...

20060220766 - Dielectric resonator rf interconnect: A RF interconnect comprising a dielectric resonator is disclosed. The dielectric resonator may be included in an interconnect housing. The dielectric resonator includes metalized side surfaces useful for securing the dielectric resonator in an aperture formed in the interconnect housing. The dimensions or material selected for the dielectric resonator may...

20060220767 - Micro-electro mechanical switch designs: A capacitive RF switch and DC RF switch include a fixed electrode having a thin layer of metal and at least one pull-down electrode. A moving plate has a plurality of corrugations and a selective finger design. The capacitive switch includes a selective finger that comes into contact with the...