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Class 333/133 - Utilizing electromechanical transducer


Subclass of Class 333 - Wave transmission lines and networks
Definition: Subject matter wherein an electrical wave driven mechanical
No. of patents: 570
Last issue date: 05/22/2012


1                      
NumberTitleIssue Date
8183958Elastic-wave ladder filter
An elastic-wave ladder filter significantly reduces loss within a passband while also increasing the passband and attenuation. The elastic-wave ladder filter includes a series arm that connects an input end and an output end and a parallel arm that connects the seri...
05/22/2012
8179207Resonator device, filter including the same, and duplexer
A resonator device includes a plurality of resonators which are connected in series. An inductor and a capacitor are connected in parallel with at least one of the plurality of resonators. At least another one of the plurality of resonators has no inductor or capaci...
05/15/2012
8169278Surface acoustic wave device and duplexer
A surface acoustic wave device in which miniaturization and a flat design implemented, is resistant to a deformation responsive to a pressure of a molten resin in the formation of a mold resin layer, and is less susceptible to a characteristic degradation. In the su...
05/01/2012
8164398Resonator, filter and electronic device
A resonator includes a substrate, a lower electrode, a piezoelectric film provided on the lower electrode, and an upper electrode provided on the piezoelectric film. The lower electrode includes a first film provided on the substrate, and a second film that is provi...
04/24/2012
8138855Device with an electroacoustic balun
A device has an electroacoustic interface between interfaces for balanced electrical signals and unbalanced electrical signals (i.e. a balun) includes a film of piezoelectric material having a first and second pair of electrodes on a first surface a common electrode...
03/20/2012
8130058Switchable tunable acoustic resonator using BST material
An acoustic resonator includes a first electrode, a second electrode, and a barium strontium titanate (BST) dielectric layer disposed between the first electrode and the second electrode, where the acoustic resonator is switched on as a resonator with a resonant fre...
03/06/2012
8125297Filter, duplexer, and communication apparatus
A filter includes: a first filter unit includes: a series resonators connected in series to each other between a first input terminal and a first output terminal; a parallel resonators each having one end connected to one terminal of each of the series resonators; a...
02/28/2012
8125298Acoustic wave filter, duplexer using the acoustic wave filter, and communication apparatus using the duplexer
An acoustic wave filter having excellent steepness is provided without adding any exterior components or any new manufacturing steps. A plurality of filters (10-1) each having a first resonator (2a-1) placed in a serial arm and hav...
02/28/2012
8093962Filter, duplexer and communication apparatus
A filter has a plurality of piezoelectric thin film resonators formed by sandwiching a piezoelectric film with a lower electrode disposed on a substrate and an upper electrode. Each of the piezoelectric thin film resonators has an electrode region formed with the up...
01/10/2012
8093961Duplexer formed on piezoelectric substrate
To provide a duplexer which is small in size and excellent in separation characteristic of transmission/reception signals. An antenna port is disposed on a center of a rearward side in a disposition area of a duplexer, a high band side filter and a low band side fil...
01/10/2012
8093960Filter duplexer and communication device
A filter has a filter section that is provided with a balanced input terminal including a terminal 1 and a terminal 2 and a balanced output terminal including a terminal 3 and a terminal 4, and that passes a signal in a passband out of in...
01/10/2012
8081049Band-pass filter device, method of manufacturing same, television tuner, and television receiver
A band-pass filter device includes: a plurality of band-pass filter elements on a principal plane of a substrate; wherein the band-pass filter elements correspond to a plurality of respective channels divided by frequency regions, and each have a plurality of piezoe...
12/20/2011
8072293Surface acoustic wave filter, antenna duplexer and method for manufacturing them
A surface acoustic wave filter comprised of a plurality of surface acoustic wave resonators having different resonance frequencies, the filter comprising a substrate made of lithium niobate, comb electrodes (1201 and 1202) formed on the substrate, and ...
12/06/2011
8063718Duplexer, communication module, and communication device
A duplexer of the present invention includes a reception filter (3) for passing signals in a predetermined frequency band and attenuates signals in the other frequency bands among reception signals input to an antenna port, and a transmission filter (4...
11/22/2011
8063717Duplexer having resonator filters
A duplexer interfacing a receiver and a transmitter with an antenna includes first and second filters. The first filter includes at least four first series resonators, four first shunt resonators respectively connected between the four first series resonators and gr...
11/22/2011
8049577Elastic wave device, duplexer using the same, and communication apparatus using the duplexer
An elastic wave device includes resonators having a piezoelectric substrate, a resonation unit formed on the piezoelectric substrate, and reflectors formed on respective sides of the resonation unit on the piezoelectric substrate, and bumps formed on the piezoelectr...
11/01/2011
8040205Duplexer having specified relationship of the minimum distances between signal pads and specific ground pads
A duplexer includes a substrate including an insulation layer, an upper interconnection layer provided on an upper surface of the insulation layer, a lower interconnection layer provided on a lower surface of the insulation layer, and an inner interconnection layer ...
10/18/2011
8035460Surface acoustic wave device, surface acoustic wave filter and antenna duplexer using the same, and electronic equipment using the same
A surface acoustic wave device includes a substrate including lithium niobate; a IDT being provided on an upper surface of the substrate and including a plurality of electrode fingers; and a protective film covering the IDT and having an uneven shape on an upper sur...
10/11/2011
8026776Acoustic wave device, duplexer, communication module, and communication apparatus
An acoustic wave device includes a ladder-type filter in which resonators are connected in a ladder configuration. In the acoustic wave device, series-connected resonators are connected in a parallel line in the ladder-type filter, and the resonators connected in th...
09/27/2011
8018298Acoustic wave device, filter and duplexer
An acoustic wave device includes a first resonator having a piezoelectric substance sandwiched between a pair of electrodes in a direction of an c-axis orientation or a polarization axis, and a second resonator that is connected in series and has another piezoelectr...
09/13/2011
8004370Surface acoustic wave element, surface acoustic wave apparatus, and communication apparatus
The invention provides a surface acoustic wave element having improved heat dissipation and power durability. These characteristics are achieved by configuring the SAW such that either of an input or ground electrode is disposed between serial arm portions of the SA...
08/23/2011
8004371Band reject filters
Distributed band reject filters are disclosed. A first radio frequency band reject filter is disclosed having a splitter having a first input port, a first output port and a second output port, the splitter being operable on an input signal applied to the first inpu...
08/23/2011
7999632Branching filter and method for manufacturing the same
A branching filter that is capable of being reduced in size, particularly in height, has a configuration in which a transmitting filter chip and a receiving filter chip include a first piezoelectric substrate and a second piezoelectric substrate, respectively, and a...
08/16/2011
7986198Frequency-variable acoustic thin film resonator, filter and communication apparatus using the same
An acoustic thin film resonator including: a first piezoelectric thin film 101; a pair of primary electrodes 103 and 104 for applying an electric signal, which are formed on the first piezoelectric thin film; a second piezoelectric thin film ...
07/26/2011
7978025Film bulk acoustic resonator, filter, communication module and communication device
There is provided a film bulk acoustic resonator which has a substrate, a lower electrode formed on the substrate, a piezoelectric membrane formed on the lower electrode, an upper electrode formed on the piezoelectric membrane, and an insulating film disposed adjace...
07/12/2011
7965155Surface acoustic wave resonator, and surface acoustic wave filter and antenna duplexer in which the surface acoustic wave resonator is used
The present invention provides a surface acoustic wave resonator capable of improving a leak of a surface acoustic wave in the transverse direction and reducing the spurious and having superior characteristics. In a surface acoustic wave filter according to the pres...
06/21/2011
7924118Duplexer and elastic wave device
In a duplexer, a transmission elastic wave filter and a reception elastic wave filter are mounted on a laminated substrate, a coil connected between an antenna terminal and a ground potential is provided on the laminated substrate, the reception elastic wave filter ...
04/12/2011
7915972Balance filter and duplexer
A balance filter includes a first filter having first multimode surface acoustic wave (SAW) filters connected in parallel, a second filter that is connected to the first filter and includes a second multimode SAW filter, a first terminal connected to the first filte...
03/29/2011
7902940Duplexer
A duplexer includes a transmission filter having a ladder circuit configuration and a reception filter. The reception filter includes an input terminal connected to an antenna terminal, a first reception output terminal, and a second reception output terminal. A fir...
03/08/2011
7898360Surface acoustic wave filter and surface acoustic wave duplexer
A surface acoustic wave filter which includes a first terminal at the input side, a second terminal at the output side, a plurality of resonators electrically connected between the first and the second terminals, and a piezoelectric substrate provided on the upper s...
03/01/2011
7893794Branching 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 band with each other, are formed, and an impedance matching circuit a...
02/22/2011
7893793Film bulk acoustic wave resonator and method for manufacturing the same
A film bulk acoustic wave resonator including a piezoelectric body 1, and a first electrode 2 and a second electrode 3 that are provided respectively on the main surfaces of the piezoelectric body, the piezoelectric body being applied an electri...
02/22/2011
7893792Duplexer using an embedded PCB and method of fabricating the same
A high-integrated duplexer and a fabrication method thereof. The duplexer has a first filter to pass a signal of a transmitted frequency band, a second filter to pass a signal of a received frequency band, an embedded PCB having the first and second filters bonded o...
02/22/2011
7889024Single cavity acoustic resonators and electrical filters comprising single cavity acoustic resonators
A single cavity acoustic resonator comprises: a first electrode; a second electrode; a third electrode disposed between the first electrode and the second electrode. The single cavity acoustic resonator also comprises: a first piezoelectric layer disposed between th...
02/15/2011
7884686Component operating on acoustic waves
A component operating with acoustic waves is described herein. The component includes a substrate having an underside subdivided into a center area and an edge area surrounding the center area on all sides. The component also includes a plurality of outer terminals ...
02/08/2011
7880561Surface acoustic wave filter device and duplexer
A surface acoustic wave (SAW) filter device includes first and second longitudinally coupled SAW filter units. The first and second filter units are cascade-connected to each other. A phase of a signal flowing through a first signal line electrically connecting seco...
02/01/2011
7876176Acoustic wave filter device and duplexer
An acoustic wave filter device includes first to fourth longitudinally coupled resonator type surface acoustic wave filters that are configured such that the first and second filters are connected to a first balanced signal terminal, the third and fourth filters are...
01/25/2011
7872548Antenna duplexer
An antenna duplexer is provided, which can be built with a smaller size and lower height than ever without compromising out-of-band attenuation characteristic and isolation characteristic between a transmit terminal and a receive terminal. The antenna duplexer inclu...
01/18/2011
7868716Acoustic wave filter apparatus
An acoustic wave filter apparatus where first balance input/output terminals of first and second acoustic wave filter sections are commonly connected to each other and then connected to a first balance terminal, second balance input/output terminals thereof are comm...
01/11/2011
7868715Duplexer and communication apparatus using the same
The present invention provides a duplexer using a ladder-type filter, which has a small size and is superior in isolation characteristic, and a communication apparatus using such a duplexer. A series resonator (R1) contained in a first filter element (F1
01/11/2011
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