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7623037 |
Multi-transducer/antenna surface acoustic wave device sensor and tag
A surface acoustic wave sensor or tag having multiple transducer/antenna pairs each having a different center frequency. The bandwidth of each transducer/antenna pair is inversely proportional to...
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7623009 |
Boundary acoustic wave filter device
A boundary acoustic wave filter device capable of increasing an out-of-band attenuation includes a dielectric film formed on a piezoelectric substrate, at least one longitudinally coupled resonator...
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7620094 |
Spread spectrum clock generator
Disclosed is a spread spectrum clock generator which includes: a first delay control type oscillator that variably controls an oscillation period at a control period interval according to a control...
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7619491 |
Elastic wave duplexer
An elastic wave duplexer includes a transmission filter chip and a reception filter chip each defined by an elastic wave filter chip and flip-chip bonded to a laminated board. A coil-shaped line...
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7612635 |
MEMS acoustic filter and fabrication of the same
A MEMS acoustic filter has a MEMS resonator and at least two acoustic I/O ports to alter an input acoustic signal to an output acoustic signal. The first I/O port is adapted for interfacing with a...
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7609129 |
Surface acoustic wave device, surface acoustic wave apparatus, and communications equipment
A second substrate 21 composed of a material having a lower dielectric constant than that of a piezoelectric substrate 2 having a transmission-side filter region 12 and a receiving-side...
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7606294 |
Channel quality estimation method and receiving apparatus
Channel quality can be detected accurately in a wireless transmission system such as an HSDPA method. In the case of estimating a channel quality of a signal transmitted by a Code Division...
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7602264 |
Filter device, multiband filter, duplexer and communications equipment using the filter device
A filter device includes a circuit board having a pattern electrode; a substrate having a filter to which a signal line for inputting or outputting a signal and a reference potential line having a...
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7602263 |
Branching filter package
A branching filter package has a SAW filter chip housing area which houses a piezo electric base, on which a transmitting SAW filter and a receiving SAW filter having a different frequency passing...
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7602262 |
Elastic wave device and manufacturing method of the same
An elastic wave device formed by bonding at least two surface acoustic wave devices by filling a resin therebetween is disclosed. Each of surface acoustic wave (SAW) devices includes a substrate; a...
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7593450 |
Dynamic frequency hopping
A frequency hopping communications system is disclosed. A server is adapted to have one or more radio head interface modules and a call processing software module. The call processing software...
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7589606 |
Electronic part utilizing a protective film on a comb-shaped electrode
An electronic part includes a substrate, a comb-shaped electrode having a plurality of electrode fingers arranged parallel to one another on the upper surface of the substrate, and a protective...
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7586992 |
Apparatus and method for channel estimation and cyclic prefix reconstruction in an OFDM-STBC mobile communication system
An apparatus and method for channel estimation and CP reconstruction in an OFDM-STBC mobile communication system are provided. An ISI canceller cancels ISI signal components from first and second...
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7586972 |
Code division multiple access enhanced capacity system
A code division multiple access (CDMA) communication system using spread spectrum signaling over a communication bandwidth uses two different signal spectra generated using two different respective...
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7583936 |
Circuit with reduced insertion loss and component comprising one such circuit
An electrical circuit has at least two parallel signal paths connected to one another on the antenna side and for which a band reject filter corresponding to the transmission range is implemented...
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7583162 |
Piezoelectric device and method for manufacturing the piezoelectric device
A piezoelectric device includes a piezoelectric substrate having a connection pad, a package having an electrode pad, and a connection member to connect the electrode pad to the connection pad, the...
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7583161 |
Surface acoustic wave device and boundary acoustic wave device
A piezoelectric substrate is joined to a cover with a support layer disposed therebetween and with a space maintained therebetween. A transmission surface acoustic wave filter and a reception...
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7581306 |
Method for producing a boundary acoustic wave device
In a method for producing a boundary acoustic wave device that includes a first medium, a second medium, and a third medium laminated in that order, and electrodes disposed at the interface between...
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7580444 |
Frequency hopping communication system
The invention provides an adaptive frequency hopping spread-spectrum (FHSS) transmission system and method, which efficiently utilizes available transmission bandwidth, whilst providing robustness...
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7579932 |
Resonator SAW filter having a control interdigital transducer between input and output interdigital transducers
A longitudinally coupled multi-mode SAW resonator filter includes input and output interdigital transducers (IDTs) with a control IDT therebetween to control a state of the surface acoustic wave....
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7579931 |
Surface acoustic wave filter element, surface acoustic wave filter and communication device using the same
A surface acoustic wave filter element has
a piezoelectric substrate; and a plurality of inter-digital transducer (IDT) electrodes formed on the piezoelectric substrate, wherein at least one...
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7579928 |
Surface acoustic wave device and communication device
A surface acoustic wave device includes front stage and rear stage surface acoustic wave elements, a signal wiring connecting between the front stage and rear stage surface acoustic wave elements,...
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7579927 |
Duplexer
A duplexer includes: a transmission filter and a reception filter that have different band center frequencies from each other; a phase matching circuit that performs phase matching on the...
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7573354 |
Duplexer and ladder type filter
A duplexer includes an antenna terminal, a first filter connected to the antenna terminal, and a second filter connected to the antenna terminal. At least one of the first filter and the second...
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7573350 |
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...
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7570149 |
Electronic circuit device including electric element and varistor on substrate and its manufacture method
An electronic element having at least a pair of electrodes is formed on a substrate. A varistor element is formed on the substrate, the varistor element including a pair of electrodes and a...
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7562451 |
Method of manufacturing actuator device for ink jet head
A method of manufacturing an actuator device configured to prevent separation of a vibration plate and to enhance durability and reliability, and a liquid-jet apparatus are provided. The method...
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7555824 |
Method for large scale integration of quartz-based devices
Methods for integrating quartz-based resonators with electronics on a large area wafer through direct pick-and-place and flip-chip bonding or wafer-to-wafer boding using handle wafers are...
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7555029 |
Method for decoding a plurality of standard radio waves and standard radio wave receiver
A method and a standard radio wave receiver for receiving a plurality of standard radio waves respectively having signal configurations in accordance with respective specifications which define...
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7554428 |
Boundary acoustic wave device comprising Ni diffused in Au and method for manufacturing the same
A boundary acoustic wave device includes a first medium, a second medium, and an IDT electrode disposed at an interface between the first medium and the second medium, the IDT electrode having an...
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7554419 |
Balanced filter and duplexer
A balanced filter includes: a filter that has at least one unbalanced signal terminal; a balun that is a lumped parameter balun that inputs or outputs signals with different phases generated based...
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7551665 |
Ultra wideband receiver architecture using high order Gaussian pulses and method of operation
An ultra wideband (UWB) receiver system operable to process a high order Gaussian pulse includes an integrator group, a correlator circuit and a comparator circuit. The integrator group includes an...
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7548135 |
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...
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7538637 |
Acoustic wave transducer with transverse mode suppression
An acoustic wave transducer includes an acoustic track having electrode fingers for different electrodes. The electrode fingers engage to form exciting finger pairs. The acoustic track also...
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7538636 |
Electronic part with a comb electrode and protective film and electronic equipment including same
An electronic part, object of which is to improve temperature characteristics and electrical properties, includes a substrate ( 1 ), a comb-type electrode ( 2 ) that is disposed on the upper...
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7528685 |
Lamb wave type high frequency device
A lamb wave type high frequency device includes: an interdigital transducer (IDT) electrode having an electrode finger interdigitated therein; a pair of reflectors having an electrode finger and...
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7528684 |
Edge chirping within series connected interdigitated transducers
The present invention provides a surface acoustic wave (SAW) architecture wherein two acoustic reflectors are formed on a piezoelectric substrate to define an acoustic cavity between the acoustic...
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7528683 |
Balanced acoustic wave filter device
A surface acoustic wave filter device includes an unbalanced terminal, first and second balanced terminals, and first, second and third IDTs. One end of the first IDT and one end of the third IDT...
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7525400 |
Band pass filtering circuit fitted with acoustic resonators
A band pass filtering circuit based on a quadripole includes a serial branch having a first acoustic resonator presenting a frequency of resonance and a frequency of anti-resonance and mounted in...
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7522894 |
Radio receiving apparatus
A radio receiving apparatus includes two receiving antennas, two upstream RF amplifiers, a SAW filter having two input IDTs and an output IDT, a downstream RF amplifier, and a detector circuit. The...
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7522020 |
Boundary acoustic wave device and method for manufacturing boundary acoustic wave device
A boundary acoustic wave device has a small thickness, which is suitable for thin apparatuses, and can be manufactured at low cost. The boundary acoustic wave device includes a first IDT electrode...
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7522016 |
Tunable surface acoustic wave resonators
A tunable SAW resonator circuit is disclosed. The tunable SAW resonator circuit includes a SAW resonator having a Q, a resistor coupled to the SAW resonator to reduce the Q, and a tuning component...
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7519097 |
Spread-signal multiplexing circuit
The invention relates to a spread-signal multiplexing circuit for frequency-multiplexing a plurality of spread signals that were generated in parallel according to the SSMA scheme. An object of the...
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7518470 |
Surface acoustic wave element, surface acoustic wave device and communication device including the same
A surface acoustic wave element 1 comprises a piezoelectric substrate 19 , IDT electrodes 3, 4, 5 of an odd number not less than three formed along a propagation direction of surface acoustic...
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7518410 |
Duplexer
A duplexer is provided. The duplexer includes a first band pass filter (BPF) coupled to a first signal port and a second signal port; and a second BPF coupled to the first signal port and a third...
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7511587 |
Oscillator comprising two one-port surface wave resonators
The invention relates to an oscillator containing two one-port surface wave resonators as frequency-determining elements. The aim of the invention is to modify known oscillators such that the...
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7505506 |
System and method for generating single sideband, constant envelope, spread spectrum signals with multiple spreading codes
A method of generating a composite signal includes the steps of: (a) generating a plurality of sub-carriers, each sub-carrier having a different frequency position in a frequency spectrum; (b)...
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7504911 |
Surface acoustic wave resonator, surface acoustic wave device, and communications equipment
A plurality of IDT electrodes 2 to 7 each having a large number of electrode fingers extending in a direction perpendicular to a propagation direction of a surface acoustic wave propagating on...
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7501912 |
General matching network for acoustic wave filters and acoustic resonators
A method and circuit matches a device to n filters, wherein each filter is a SAW filter, BAW filter, or FBAR filter. The method and system: (a) provide an inductor or transmission line connected...
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7498905 |
SAW filter and method of manufacturing the same
In an SAW filter on one side of a piezoelectric substrate are formed a pattern portion constituted by a conductor and provided on the outer circumferential portion of the surface acoustic wave...
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