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7619494 |
Ladder type piezoelectric filter
In a ladder-type piezoelectric filter, the attenuation in the stop bands on a low frequency side and a high frequency side are increased while the pass band is widened. The ladder-type...
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7619493 |
Bulk acoustic resonator and filter element
A bulk acoustic resonator has an acoustic reflector portion formed on a substrate and including one or more low acoustic impedance layers and one or more high acoustic impedance layers having a...
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7616079 |
Bulk acoustic wave resonator and circuit comprising same
The invention relates to a resonator operating with bulk acoustic waves (BAW resonator, BAW=Bulk Acoustic Wave) and band-pass filters constructed of such resonators. To increase the edge steepness...
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7612636 |
Impedance transforming bulk acoustic wave baluns
A bulk acoustic wave device includes an acoustic decoupler between first and second film bulk acoustic resonators (FBARs). The first FBAR is resonant at a resonant frequency of the device and...
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7608978 |
Sensing systems utilizing acoustic wave devices
A sensing system includes an acoustic wave device comprising a body of piezoelectric material, and a first electrode assembly mounted on the piezoelectric body whereby an appropriate input applied...
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7602101 |
Piezoelectric thin-film resonator and filter using the same
A piezoelectric thin-film resonator includes: a lower electrode supported by a substrate, a space being defined below the lower electrode; a piezoelectric film provided on the lower electrode and...
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7598827 |
Harmonic termination of power amplifiers using BAW filter output matching circuits
A system, apparatus and method for providing filtering functionality and impedance transformation within a BAW resonator network are disclosed. In particular, a BAW resonator network is designed to...
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7598826 |
Piezoelectric thin film device having a drive section with a weighted portion
There is provided a piezoelectric thin film device with its frequency impedance characteristic unsusceptible to spuriousness. A film bulk acoustic resonator has a configuration where an adhesive...
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7586392 |
Dual path acoustic data coupling system and method
A data coupler includes first and second acoustic isolation transformers that develop first and second isolated output signals in response to first and second modulated input signals. A first and a...
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7586391 |
Switchable filter with resonators
A switchable filter may include a first acoustic resonator including first electrodes, and a first resonant layer between the first electrodes and having electrostrictive material. The switchable...
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7586390 |
Bulk acoustic wave resonator, bulk acoustic wave filter, RF module including bulk acoustic wave resonator and/or filter, and bulk acoustic wave oscillator
A bulk acoustic wave resonator which has excellent elasticity and high electromechanical energy conversion efficiency. A bulk acoustic wave resonator comprises a substrate, a lower electrode formed...
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7586389 |
Impedance transformation and filter using bulk acoustic wave technology
A system, apparatus and method for providing filtering functionality and impedance transformation within a BAW resonator network are disclosed. In particular, a BAW resonator network is designed to...
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7583163 |
Acoustic wave filter and manufacturing method of the same
A technique capable of integrally forming SMR type acoustic wave filters corresponding to multiple bands on the same chip at low cost is provided. In SMR type acoustic wave filters including...
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7579926 |
FBAR band pass filter, duplexer having the filter and methods for manufacturing the same
A duplexer including an FBAR band pass filter that can be easily embodied in single chip, and a method for manufacturing the same are disclosed. The duplexer of a mobile communication device...
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7579662 |
MEMS resonator and method of enhancing an output signal current from a MEMS resonator
The resonator comprises two capacitively coupled electrodes. One of the electrodes is made of a p-type doped semiconductor material, whereas the other electrode is made of an n-type doped...
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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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7570134 |
Micro-resonator and communication apparatus
The present invention provides a micro-resonator in which it is possible to lower synthesized impedance and it is possible to apply it to devices to be desired. Also, the present invention provides...
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7567148 |
Frequency shunt
A frequency separating unit includes an antenna unit, a first signal path, a second signal path, first band-pass filter in the first signal path, a second band-pass filter in the second signal...
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7557677 |
Cascaded monolithic crystal filter with high out-of-band rejection
In one embodiment, a cascaded monolithic crystal filter is provided. A first filter includes two resonators having a pair of electrodes with the monolithic crystal between. At least one electrode...
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7554426 |
Resonator, apparatus having the same and fabrication method of resonator
A resonator includes a substrate, and a resonating unit formed on the substrate, and having a lower electrode, a piezoelectric film, and an upper electrode. The lower electrode is formed of at...
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7554422 |
Filter module using piezoelectric resonators, duplexer, communication device, and method for fabricating filter module
A filter module includes a substrate and a plurality of resonators formed on the substrate and utilizing longitudinal vibration along the thickness of a piezoelectric layer. A plurality of external...
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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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7548140 |
Bulk acoustic wave (BAW) filter having reduced second harmonic generation and method of reducing second harmonic generation in a BAW filter
In a filter having a half-ladder structure comprising an alternating series of series branches and shunt branches, including a signal input and a signal output related to a common ground, at least...
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7548139 |
Coupled resonator filter and fabrication method thereof
A coupled resonator filter and a method of fabricating the coupled resonator filter are provided. The method includes: sequentially stacking a first electrode, a first piezoelectric layer, a second...
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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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7545077 |
Filter having multiple piezoelectric thin-film resonators
A filter includes multiple piezoelectric thin-film resonators each having a substrate, a lower electrode formed on the substrate, a piezoelectric film formed on the lower electrode, and an upper...
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7541722 |
Electronic component and manufacturing method thereof
An electronic component has a structure which prevents corrosion caused by moisture intrusion through an electrode pattern extending inwardly from an edge connecting a side and one of main surfaces...
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7535324 |
Piezoelectric resonator structure and method for manufacturing a coupled resonator device
A method for manufacturing a coupled resonator device includes forming a first part of a plurality of layers, trimming an exposed layer of the first part and forming a remaining part of the...
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7535323 |
Bulk acoustic wave filter with reduced nonlinear signal distortion
A filter circuit includes at least one series resonator having a first terminal and a second terminal, where the first and second terminals of the at least one series resonator are coupled to an...
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7535322 |
Monolithic RF filter
A filter formed of film bulk acoustic resonators has a topology that enables a trimming inductor to be fabricated on the same substrate as the resonator arrays. The entire filter can be fabricated...
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7535319 |
Band pass filter and duplexer having the same
A band pass filter for improving filtering, realizing high integration, and reducing manufacturing costs, and a duplexer having the band pass filter. The band pass filter comprises a first resonant...
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7535154 |
Piezoelectric thin-film resonator
In a piezoelectric resonator, a portion of a thin film unit is supported by a substrate. A portion of the thin film unit acoustically isolated from the substrate includes a) a vibration unit and b)...
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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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7525399 |
Thin-film piezoelectric resonator, filter and voltage-controlled oscillator
A thin-film piezoelectric resonator includes a substrate, and first and second excitation portions. The substrate includes first and second cavities. The first excitation portion is disposed over...
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7525398 |
Acoustically communicating data signals across an electrical isolation barrier
In one aspect, a data communication system includes a modulator, an integrated acoustic data coupler, and a demodulator. The modulator modulates a carrier signal having a frequency in an operating...
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7522018 |
Electro-acoustic resonator with a top electrode layer thinner than a bottom electrode layer
An electro-acoustic resonator ( 1, 8, 17 ) of the membrane or FBAR type ( 1 ) or the solidly-mounted or SBAR type ( 8 ), with electrodes comprising a single conducting layer or multiple conducting...
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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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7508286 |
HBAR oscillator and method of manufacture
An oscillator comprises a substrate and a high tone bulk acoustic resonator (HBAR), which includes a portion of the substrate. The oscillator also comprises a film bulk acoustic resonator (FBAR)...
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7504910 |
Thin-film piezoelectric resonator utilizing a second or higher harmonic mode
A thin-film piezoelectric resonator having a thin-film portion with a piezoelectric thin film disposed between a pair of opposing electrodes, an insulating layer formed on one of the pair of...
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7504760 |
Surface acoustic wave element and method of manufacturing the same
A surface acoustic wave element having power resistance is provided. In the surface acoustic wave element, upper dispersion preventing layers and side dispersion preventing layers each made of...
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7498904 |
Piezoelectric thin film resonator and devices provided with the same
A piezoelectric thin film resonator includes a substrate in which a cavity is formed, a first electrode having a first electrode edge and partly spanning the cavity on the substrate; a...
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7498899 |
Duplexer with filters including film bulk acoustic resonators
A duplexer includes: first and second filters including film bulk acoustic resonators (FBARs) arranged in a ladder form; first and second integrated-passive devices (IPDs) provided between a common...
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7492242 |
Integrable tunable filter circuit comprising a set of BAW resonators
A tunable filter circuit having inputs IN 1 -IN 2 and outputs OUT 1 -OUT 2 , comprising at least a primary four-pole circuit including in cascade: a first varactor having a first electrode...
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7492241 |
Contour-mode piezoelectric micromechanical resonators
A contour mode micromechanical piezoelectric resonator. The resonator has a bottom electrode; a top electrode; and a piezoelectric layer disposed between the bottom electrode and the top electrode....
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7486003 |
Polymer bulk acoustic resonator
A polymer bulk acoustic resonator that includes an active semiconductor layer, a first thin film electrode layer applied to the semiconductor layer, a thin film electro-active polymer layer applied...
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7479851 |
Piezoelectric component and method for producing it
A piezoelectric component comprises at least two stacked crystal filters on a substrate. Each stacked crystal filter comprises a bottom electrode, a first piezoelectric layer arranged above the...
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7479850 |
Miniaturised half-wave balun
A miniaturised half-wave balun comprises a single-ended I/O port comprising a first signal carrying terminal for connection to a source impedance and a differential I/O port comprising second and...
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7479848 |
Acoustic wave filter device
In an acoustic wave filter device, a first filter circuit portion includes a first inductor provided in a series arm that couples an input terminal and an output terminal is serially connected to a...
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7477115 |
Piezoelectric resonator, method of manufacturing piezoelectric resonator, and filter, duplexer, and communication device using piezoelectric resonator
A piezoeletric resonator includes: a substrate; a lower electrode formed on or above the substrate; a piezoeletric body formed on or above the lower electrode; an upper electrode formed on or above...
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7474174 |
Ladder-type thin-film bulk acoustic wave filter
A ladder filter comprising a plurality of bulk acoustic wave resonators, the resonators comprising a plurality of series resonators series resonators in series between an input terminal and an...
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