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9041486 |
Ladder type surface acoustic wave filter and duplexer using same
An object of the present invention is to improve the passing characteristic at high temperature in a ladder-type elastic wave filter and a duplexer including the filter. The ladder-type elastic... |
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9041487 |
Surface acoustic wave filter and duplexer using same
An SAW filter and a duplexer excellent in electrical characteristics will be provided. An SAW filter has a piezoelectric substrate 40, a surface acoustic wave element 10 having a first IDT... |
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9035725 |
Acoustic wave device
An acoustic wave device includes a piezoelectric substrate, an interdigital transducer (IDT) electrode provided on an upper surface of the piezoelectric substrate, a first dielectric film covering... |
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9035722 |
Ladder filter, duplexer and module
A ladder filter includes at least one series resonator connected in series between an input terminal and an output terminal, at least one parallel resonator connected in parallel with the at least... |
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9019045 |
Filter circuit having improved filter characteristic
A ladder-type-like filter circuit is specified with improved filter behavior. Inductive elements that interconnect parallel resonators with ground are electromagnetically coupled to one another. |
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9013251 |
Acoustic wave device
An acoustic wave device has a substrate and adjacent IDT electrodes. One IDT electrode has a signal connecting bus bar at one side in a direction orthogonal to a propagation direction and is... |
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9009947 |
Methods for making a sensitive resonating beam accelerometer
A method of making a resonating beam accelerometer (RBA). In an example process, a proof mass device and resonators are created from a quartz material. A direct bond is formed between the proof... |
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9000867 |
Acoustic wave device and module
An acoustic wave device includes: a support substrate composed of lithium tantalate in multi-polarization condition; an element substrate that is provided on an upper face of the support substrate... |
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8991022 |
Method for manufacturing piezoelectric resonator device
A method for manufacturing piezoelectric resonator devices according to the present invention includes the following steps: a wafer forming step of preparing a thick-walled wafer 30 integrally... |
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8981872 |
Antenna duplexer with high GPS suppression
An antenna duplexer includes a transmission filter which operates in a transmission frequency band and has a transmission filter output. A reception filter operates in a reception frequency band... |
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RE45419 |
Surface acoustic wave device and method of fabricating the same
A surface acoustic wave device includes a piezoelectric substrate having a first surface on which comb-like electrodes, first pads connected thereto, and a first film are provided. The first film... |
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8975984 |
Micro-electro-mechanical transducer having an optimized non-flat surface
A micro-electro-mechanical transducer (such as a cMUT) having a non-flat surface is disclosed. The non-flat surface may include a variable curve or slope in an area where a spring layer contacts a... |
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8963655 |
Acoustic wave device and method for producing same
An acoustic wave device comprises a substrate and an acoustic wave element on one main surface of the substrate. Side surfaces of the substrate comprises a protruding portion which protrudes out... |
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8941451 |
Broadband SAW filter
A new type of very broad bandwidth filters with small insertion loss and high return loss are given. The new filter uses a substrate that can propagate a PSAW and fan shaped transducers of low... |
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8928432 |
Surface acoustic wave resonator, surface acoustic wave oscillator, and electronic apparatus
A surface acoustic wave resonator includes: an IDT which is disposed on a quartz substrate with Euler angles of (−1°≦φ≦1°, 117°≦θ≦142°, 42.79°≦|ψ|≦49.57°), which is made of Al or alloy including... |
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8923794 |
Temperature compensation of acoustic resonators in the electrical domain
Embodiments of apparatuses, systems and methods relating to temperature compensation of acoustic resonators in the electrical domain are disclosed. Other embodiments may be described and claimed. |
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8917520 |
Circuit substrate
A circuit substrate includes: a laminate substrate in which a conductive layer and an insulating layer are laminated; a filter chip that has an acoustic wave filter and is provided inside of the... |
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8907740 |
Duplexer
A duplexer includes: an insulation substrate having an upper surface on which a transmission filter and a reception filter are mounted, and a lower surface on which a foot pad layer electrically... |
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8907741 |
Acoustic wave power device
A power device comprises an output port and at least one first acoustic pathway and one second acoustic pathway, each acoustic pathway comprising at least one first input acoustic wave transducer... |
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8907747 |
Device using a filter with resonators
A filter device including an input electronic circuit having an input load admittance Yin, an output electronic circuit having an output load admittance Yout, a lattice filter with two types of... |
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8896397 |
Surface acoustic wave device and method of adjusting LC component of surface acoustic wave device
A surface acoustic wave device comprises a piezoelectric substrate (1), at least one inter-digital transducers (IDT) (2) provided on the piezoelectric substrate, at least one elongated electrode... |
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8881370 |
Method of fabricating an inertial sensor
Inertial sensor having a body with first and second cavities on opposite sides thereof, a sensing element in the first cavity, electronic circuitry in the second cavity, electrical conductors... |
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8872602 |
Filter module
In a filter module having excellent phase balance characteristics, a length of a signal path between a first balanced mount electrode and a first balanced terminal electrode is different from a... |
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8847700 |
Filter, duplexer, communication module, communication device
The filter includes one or more series resonators and one or more parallel resonators. An inductance is connected in series to at least a parallel resonator of the parallel resonators, and a... |
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8823469 |
Saw filter and a receiver for remote keyless entry and tire pressure monitoring systems using same
A SAW filter includes at least four electrically interconnected DMS tracks. First and second tracks of the at least four DMS tracks are connected in parallel in opposite directions to form a first... |
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8791773 |
Surface acoustic wave filter and duplexer
A surface acoustic wave filter and a duplexer are provided. In a surface acoustic wave filter, on a piezoelectric substrate, a first IDT electrode composed of an input/output electrode and a first... |
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8791774 |
Branching filter
A branching filter includes a ladder-type elastic wave filter unit connected between an antenna terminal and a transmission signal terminal and a longitudinally coupled resonator-type elastic wave... |
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8786384 |
Self-matched band reject filter
The present application describes a radio frequency band reject filter including an input port, an output port, a plurality of acoustic resonators and an inductor for matching the impedance of the... |
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8773221 |
Band rejection filter
An inexpensive compact band rejection filter realizes a high sharpness of a filter characteristic at ends of passbands and has a large attenuation. In the band rejection filter, at least one of a... |
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8756796 |
Method for producing an electric component
A method for producing an electric component including a dielectric layer on a substrate, includes the method steps of applying a metallic layer to the substrate and oxidizing the metallic layer... |
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8736149 |
Electronic component with metal plate above element and fabrication method of the same, and electronic device including the same
An electronic component includes: an element that is located on a substrate; a signal wiring that is located on the substrate and electrically connected to the element; a metal plate that is... |
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8732922 |
Parylene-C as a piezoelectric material and method to make it
A parylene C polymer that is electrically poled such that it is piezoelectric is presented. Methods for manufacturing the piezoelectric parylene C polymer with an optimal piezoelectric coefficient... |
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8736402 |
Elastic wave filter device with IDT electrodes that include a narrower-pitch portion
An elastic wave filter device having improved sharpness of filter characteristics includes a longitudinally-coupled resonator-type elastic wave filter section including first to third IDT... |
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8720022 |
Method of producing an acoustic wave device
A method of producing an acoustic wave device includes: forming an interdigital electrode on a piezoelectric substrate; forming a barrier film so as to cover the interdigital electrode; forming a... |
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8723392 |
Saw filter having planar barrier layer and method of making
Disclosed herein is a surface acoustic wave (SAW) filter and method of making the same. The SAW filter includes a piezoelectric substrate; a planar barrier layer disposed above the piezoelectric... |
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8723624 |
Elastic wave device having an insulating film with wiring thereon not arranged over the IDT electrodes
An elastic wave device that suppresses high-frequency spurious components caused by unwanted waves, such as bulk waves, and improves filter characteristics, includes a piezoelectric substrate, an... |
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8723621 |
Elastic wave device having pairs of filters that face each other
In an elastic wave device, a first piezoelectric substrate and a second piezoelectric substrate are joined to each other with a joining portion so as to face each other across a cavity. A first... |
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8710940 |
Elastic wave device having a capacitive electrode on the piezoelectric substrate
An elastic wave device includes a piezoelectric substrate, an IDT electrode located on the piezoelectric substrate, and a capacitive electrode that is located on the piezoelectric substrate and is... |
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8698580 |
Surface acoustic wave device and method for manufacturing the same
A surface acoustic wave device includes first interconnections and second interconnections connected to a potential different from a potential connected to the first interconnections that are... |
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8699544 |
System and method for wireless communications
System and method for enabling the cohabitation of licensed and unlicensed communications devices. A method comprises at a receiver, receiving transmitted data, demodulating the transmitted data... |
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8692630 |
Guided acoustic wave resonant device and method for producing the device
A guided acoustic wave resonant device is provided. The device comprises at least two filters (F1, . . . , Fi, . . . , FN), each filter comprising at least two acoustic wave resonators (R11-R12, .... |
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8686809 |
Ladder-type filter including a dielectric film having a side surface with a heightwise inclination
A ladder-type filter having plural elastic-wave resonators provided on a series arm and a parallel arm in a ladder shape on a piezoelectric substrate. Each of the elastic-wave resonators has an... |
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8677604 |
Method of manufacturing boundary acoustic wave device
A method of manufacturing a boundary acoustic wave device includes the steps of forming an electrode on a first medium layer, forming a second medium layer so as to cover the electrode on the... |
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8680931 |
Periodic signal generators having microelectromechanical resonators therein that support surface wave and bulk acoustic wave modes of operation with different temperature coefficients of frequency
A periodic signal generator is configured to generate high frequency signals characterized by relatively low temperature coefficients of frequency (TCF). This generator may include an oscillator... |
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8674790 |
Surface acoustic wave device, oscillator, module apparatus
A surface acoustic wave device includes: a sapphire substrate having a C-plane main surface; comb-like electrodes which excite surface acoustic waves formed on the main surface of the sapphire... |
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8669832 |
Acoustic wave device and acoustic wave filter
An acoustic wave device includes an interdigital transducer (IDT) electrode and a separate electrode facing the IDT electrode. The IDT electrode includes first and second comb-shaped electrode... |
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8660168 |
Method and system for communicating via a spatial multilink repeater
Aspects of a method and system for communicating via a spatial multilink repeater are provided. In this regard, a received signal may be frequency shifted to generate a plurality of repeated... |
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8648672 |
Filter, portable terminal and electronic component
An object is to obtain a steep and large attenuation amount in attenuation bands close to each other out of a band of a TV wave and to provide a filter in which the use number of inductors is... |
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8648673 |
Elastic wave apparatus with a floating wiring line on a base substrate
A small-sized elastic wave apparatus in which heat generated at a portion of a cascade connection between resonators is sufficiently dissipated includes on one main surface of a piezoelectric... |
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8648670 |
Filter, duplexer and communication module
According to an aspect of the invention, each of a filter, a duplexer and a communication module includes a plurality of series resonators connected to a signal line in series and a plurality of... |