Wave transmission lines and networks inventions 09/06

20060208823 - Tunable dielectric radio frequency microelectromechanical system capacitive switch: The invention is a tunable RF MEMS switch developed with a BST dielectric at the contact interface. BST has a very high dielectric constant (>300) making it very appealing for RF MEMS capacitive switches. The tunable dielectric constant of BST provides a possibility of making linearly tunable MEMS capacitive switches....

20060208822 - Bi-crystal heterostructure electronic isolator: A bi-crystal heterostructure includes a first, substantially uniaxial, crystal layer; a second, substantially uniaxial, crystal layer positioned adjacent to the first crystal layer, and wherein the first and second crystal layers have mutually opposite rotations of their respective principal cross-sectional axes of a degree sufficient to impart negative refractivity in...

20060208824 - Compact balun: A distributed backwards-wave balun comprising first and second pairs of coupled transmission line sections 10A, 10B and 12A, 12B having one line section 10A of the first coupled pair connected in series with one line section 12A of the second coupled pair. A differential port 14 is connected across the...

20060208825 - Transmission line transition: A first dielectric substrate 1 has an electromagnetically coupling conductor for a coplanar strip transmission line 4 disposed on a surface close to a dielectric layer 7, a second dielectric substrate 2 has a grounding conductor 12 disposed on a surface close to the dielectric layer, the grounding conductor 12...

20060208826 - Electronically controllable rf switch: An RF switch circuit (10) and a turner (12) comprising an RF switch circuit are described. The switch circuit comprises at least two input terminals and one output terminal. The input terminals are connected to different RF signal sources, e. g. a terrestrial TV antenna (16) and a TV cable...

20060208827 - 90-degree 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 parallel to each other and whose ends form gate connections, and whose dimensions and mutual separations...

20060208828 - Dc isolated phase inverter and a ring hybrid coupler including the dc isolated phase inverter: A direct current (DC) isolated phase inverter and a ring hybrid coupler including the DC isolated phase inverter is provided. The ring hybrid coupler including the DC isolated phase inverter comprising: a first, second, third and fourth transmission line arm; a first port connected to the first arm, second port...

20060208829 - System and method for timer windows: A system and method for timer windows is provided. A mechanism is provided for managing actions that need to be started within a specified interval. By exploiting windows of acceptable times for events, timer expirations can be grouped and processed in batches to improve the throughput of the system. For...

20060208830 - Adjustable delay transmission line: A transmission line includes a signal conductor and at least one varactor diode capacitively coupled to the signal conductor. The transmission line's signal path delay is a function of its shunt capacitance, and the varactor's capacitance forms a part of the transmission line's shunt capacitance. The transmission line's signal path...

20060208831 - Digital filter, design method thereof, design device, and digital filter design program: An original filter is connected to an adjustment filter in the longitudinal way. The original filter has a first filter coefficient of a symmetric numeric string. The adjustment filter has a contact point at a position where the maximum value is acquired in the original filter frequency amplitude characteristic A...

20060208832 - Radio frequency inductive-capacitive filter circuit topology: A filter circuit topology for filtering a radio frequency input signal includes one or more inductor devices, such as, for example, discrete chip or air coils. The inductor devices are center tapped into a capacitor coupled to the ground. The center-tapped inductor configuration splits the output voltage across the inductor...

20060208833 - Method of forming film bulk acoustic wave filter assembly: A film bulk acoustic wave filter assembly includes a film bulk acoustic filter and an RF circuit. The film bulk acoustic filter unit cell includes a plurality of film bulk acoustic wave resonators. The number, area and arrangement of the resonators depend on the characteristics of the filter. In the...

20060208834 - Balanced surface acoustic wavefilter: In a balanced-type surface acoustic wave filter, IDTs in the center of each of first and second longitudinally coupled resonator type surface acoustic wave filter sections are connected to an unbalanced input terminal, first and third IDT sections on both the sides of the center IDT are connected to first...

20060208835 - Signal transmission structure: A signal transmission structure is provided. The signal transmission structure includes a circuit board, a coaxial cable connector, and a conductive layer; the aforementioned circuit board includes at least one alignment through hole, a signal pad, and a signal trace connected to the signal pad. Additionally, the signal pad and...

20060202775 - Systems and methods for tuning filters: Methods, systems and apparatus for filter design, analysis and adjustment are provided. Various embodiments may include, for example, methods, systems and apparatus for electric signal filter tuning. Embodiments may also include design techniques for planar electric signal (e.g., RF signals) filter tuning. In at least an embodiment of the present...

20060202776 - On-chip balun and transceiver using the same and method for fabricating on-chip balun: Provided are an on-chip balun, a transceiver using the on-chip balun, and a method for fabricating the on-chip balun. The on-chip balun includes: a first metal winding including a port grounded and a port to which an unbalanced signal is input; a second winding outputting an induced current generated by...

20060202777 - 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 characteristics to overcome differences in field intensity across the slotline module configuration...

20060202778 - Pole-zero elements and related systems and methods: According to one aspect, the subject matter described herein includes a tunable duplexer. The tunable duplexer can include a common node for communicating signals comprising a plurality of frequencies. Further, the tunable duplexer can include first and second band nodes for communicating first and second predetermined frequency bands, respectively, of...

20060202779 - Monolithic vertical integration of an acoustic resonator and electronic circuitry: Monolithic devices that include an acoustic resonator vertically integrated with electronic circuitry are described. In one aspect, a monolithic integrated device includes a substrate, electronic circuitry supported by the substrate, an acoustic isolator over the electronic circuitry, and an acoustic resonator on the acoustic isolator. A method of fabricating the...

20060202781 - Saw component with adhesive location and use thereof: The invention is an adhesive, in particular, for components that operate with surface acoustic waves, including a polymer matrix filled with mineral filler particles. The filler is selected from non-conductive or semi-conductive materials and is contained in the adhesive in such a proportion that the total density of the adhesive...

20060202780 - Surface acoustic wave filter and manufacturing method thereof: A surface acoustic wave filter includes a device chip, one principal surface of a piezoelectric substrate having a wiring pattern including IDTs and pads electrically connected to the IDTs, that is disposed so as to oppose a mount board, with the pads being electrically connected to lands of the mount...

20060202782 - Oscillator with acoustic surface wave resonators: An oscillator or a sensor comprising a unit including two frequency determining elements each of which comprises at least one interdigital converter for acoustic surface waves and a back-coupling circuit comprising an amplifier, wherein the frequency determining elements are distinguished by a temperature dependence of a synchronous frequency. The frequency...

20060202783 - Rf filter tuning system and method: An apparatus comprises a radio frequency filter and a dielectric material configured to alter the frequency response of the RF filter, wherein said dielectric material is located in proximity to said RF filter. The apparatus may be useful in a satellite antenna system wherein the RF filter is configured to...

20060202784 - Systems and methods for blocking microwave propagation in parallel plate structures: Systems and methods are taught for blocking the propagation of electromagnetic waves in parallel-plate waveguide (PPW) structures. Periodic arrays of resonant vias are used to create broadband high frequency stop bands in the PPW, while permitting DC and low frequency waves to propagate. Some embodiments of resonant via arrays are...

20060197624 - Extended matching range tuner: In a T network tuner, a variable shunt capacitor is provided between the signal input and ground that is ganged to the variable input matching capacitor. The operation is mechanically arranged such that, as one decreases the capacitance of the variable input matching capacitor, one increases the capacitance of the...

20060197625 - Transmission line and wiring forming method: To provide a transmission line capable of absorbing the reflection caused by mismatching between impedances and restraining the attenuation value of a signal. The following wiring patterns are formed out of a connector mounting area in which a connector is mounted: a wiring pattern designed so as to gradually increase...

20060197626 - Integrated directional bridge: A directional bridge for measuring propagated signals to and from a source device to a load device where both the source device and load device are in signal communication with the directional bridge is disclosed. The directional bridge may include a first bridge circuit network and a first sensing element...

20060197627 - Low-loss directional bridge: A low-loss directional bridge for measuring propagated signals from a source device to a load device or from a load device to a source device, where both the source device and the load device are in signal communication with the low-loss directional bridge. The low-loss directional bridge may include a...

20060197628 - Bow tie coupler: A wide bandwidth coupler has two outer elements around a center element. The outer elements are rectangular at their outside portions and each have a tapered nose portion next to the center element. A matching network electrically connects the two outer elements and the center element. The center element is...

20060197629 - 3db coupler: A 3 dB coupler includes at least one first and one second electric conductor that are spaced apart from each other and are capacitively and inductively coupled to each other in a coupling region. The first conductor represents the primary side of a transformer, and the second conductor represents the...

20060197630 - Surface acoustic wave device: A surface acoustic wave device has a structure in which a surface acoustic wave element (11) provided with two kinds of surface acoustic wave filter structures having different center frequencies on the same piezoelectric substrate (12) is disposed on a package (16). The surface acoustic wave element (11) comprises a...

20060197631 - Method and mechanism for tuning dielectric resonator circuits: The invention comprises a technique and associated mechanisms by which dielectric resonator circuits, such as filters, can be tuned in both frequency, bandwidth or both without the need for irises, tuning screws and/or tuning plates. In accordance with the invention, the positions of the dielectric resonators are adjustable relative to...

20060197632 - Gyrator with feedback resistors: A gyrator includes a gyrator core and at least one common mode feedback circuit. The gyrator core includes four inverters mutually connected in a loop configuration between a pair of input ends and a pair of output ends. The common mode feedback circuit is provided between the pair of input...

20060197633 - Magnetic resonance imaging method and system: Apparatus, process and a volume strip array can be provided, e.g., for use in connection with magnetic resonance imaging (“MRI”). The apparatus includes an arrangement adapted to transmit a signal to generate a magnetic field in a particular mode, and to receive a signal in response to the generated field...

20060197624 - Extended matching range tuner: In a T network tuner, a variable shunt capacitor is provided between the signal input and ground that is ganged to the variable input matching capacitor. The operation is mechanically arranged such that, as one decreases the capacitance of the variable input matching capacitor, one increases the capacitance of the...

20060197625 - Transmission line and wiring forming method: To provide a transmission line capable of absorbing the reflection caused by mismatching between impedances and restraining the attenuation value of a signal. The following wiring patterns are formed out of a connector mounting area in which a connector is mounted: a wiring pattern designed so as to gradually increase...

20060197626 - Integrated directional bridge: A directional bridge for measuring propagated signals to and from a source device to a load device where both the source device and load device are in signal communication with the directional bridge is disclosed. The directional bridge may include a first bridge circuit network and a first sensing element...

20060197627 - Low-loss directional bridge: A low-loss directional bridge for measuring propagated signals from a source device to a load device or from a load device to a source device, where both the source device and the load device are in signal communication with the low-loss directional bridge. The low-loss directional bridge may include a...

20060197628 - Bow tie coupler: A wide bandwidth coupler has two outer elements around a center element. The outer elements are rectangular at their outside portions and each have a tapered nose portion next to the center element. A matching network electrically connects the two outer elements and the center element. The center element is...

20060197629 - 3db coupler: A 3 dB coupler includes at least one first and one second electric conductor that are spaced apart from each other and are capacitively and inductively coupled to each other in a coupling region. The first conductor represents the primary side of a transformer, and the second conductor represents the...

20060197630 - Surface acoustic wave device: A surface acoustic wave device has a structure in which a surface acoustic wave element (11) provided with two kinds of surface acoustic wave filter structures having different center frequencies on the same piezoelectric substrate (12) is disposed on a package (16). The surface acoustic wave element (11) comprises a...

20060197631 - Method and mechanism for tuning dielectric resonator circuits: The invention comprises a technique and associated mechanisms by which dielectric resonator circuits, such as filters, can be tuned in both frequency, bandwidth or both without the need for irises, tuning screws and/or tuning plates. In accordance with the invention, the positions of the dielectric resonators are adjustable relative to...

20060197632 - Gyrator with feedback resistors: A gyrator includes a gyrator core and at least one common mode feedback circuit. The gyrator core includes four inverters mutually connected in a loop configuration between a pair of input ends and a pair of output ends. The common mode feedback circuit is provided between the pair of input...

20060197633 - Magnetic resonance imaging method and system: Apparatus, process and a volume strip array can be provided, e.g., for use in connection with magnetic resonance imaging (“MRI”). The apparatus includes an arrangement adapted to transmit a signal to generate a magnetic field in a particular mode, and to receive a signal in response to the generated field...