Did You Know...
...that the x-ray was discovered purely by accident? When German physicist Wilhelm Konrad von Roentgen was experimenting with cathode rays in 1895, he put an activated Crookes tube in a book and went out to lunch. When he returned, he discovered that a key that had also been placed in the book showed up as an image on the developed film!
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| Number | Title | Issue Date |
| 8188812 | Elastic wave device and ladder filter device An elastic wave device includes a first elastic wave resonator and a second elastic wave resonator that are connected in series to each other, and a resistor is connected in parallel with the first elastic wave resonator while no resistors are connected in parallel ... | 05/29/2012 |
| 8179211 | RF-filter with improved adjacent channel suppression The invention relates to a filter with a first partial filter (TF1), comprising a series resonator (S1) and at least two parallel resonators (P1, P2) that are arranged in respective parallel branches, and with a second partial filter (TF | 05/15/2012 |
| 8169279 | Notched saw image frequency rejection filter system A notched SAW image frequency rejection filter system includes a SAW filter having an input, an output and a ground output and an impedance matching network including a first matching inductance connected to the SAW filter output and a second matching inductance con... | 05/01/2012 |
| 8125300 | Surface acoustic wave filter comprising a band-pass filter and a band-stop filter An electric filter has a band-pass filter that includes a track with acoustically coupled electroacoustic transducers. The filter includes a band-stop filter with at least one electroacoustic series element and at least one electroacoustic parallel element. The seri... | 02/28/2012 |
| 8106725 | Acoustic wave filter device An acoustic wave filter device includes longitudinally coupled resonator-acoustic wave filters having a balanced-unbalanced conversion function, and increases the amount of attenuation in an attenuation band and improves the isolation characteristics when the acoust... | 01/31/2012 |
| 8085116 | Elastic wave device with a dielectric layer on the comb-shaped electrodes An elastic wave device is described which includes a piezoelectric substrate, comb-shaped electrodes having teeth electrodes that are disposed so as to face each other on the piezoelectric substrate, a non-overlapping area in which the teeth electrodes of the comb-s... | 12/27/2011 |
| 8085117 | Slotted boundary acoustic wave device A piezoelectric boundary acoustic wave (PBAW) device includes a slotted dielectric body disposed over one surface of a piezoelectric body and electrodes forming an IDT at the interface between the piezoelectric body and the dielectric body. The thickness of the elec... | 12/27/2011 |
| 8063722 | Balance filter comprising two acoustic wave filters connected to a single ground terminal A balance filter includes two acoustic wave filters connected between a single unbalanced terminal and two balanced terminals, and a ground terminal connected to the two acoustic wave filters via a first interconnection portion and a second interconnection portion. ... | 11/22/2011 |
| 8049582 | Transversal filter The filter includes at least one acoustic track formed on a piezoelectric substrate. At least one SAW input transducer and at least one SAW output transducer are arranged in each track. Each track has a RSPUDT structure and thus a distributed excitation. The excitat... | 11/01/2011 |
| 8035464 | Bonded wafer SAW filters and methods Improved coupling coefficients and desirable filter characteristics are exhibited in a SAW filter including an electrode pattern deposited on a piezoelectric substrate bonded directly to an anti-reflective layer, wherein the anti-reflective layer is bonded to a carr... | 10/11/2011 |
| 8031034 | Surface acoustic wave filter and method for improved rejection A SAW coupled resonator filter providing improved rejection outside the passband frequencies includes at least two filter tracks on a piezoelectric substrate with each track having a plurality of acoustically cascaded transducers disposed along a longitudinal axis o... | 10/04/2011 |
| 8026780 | Resonator filter working with surface acoustic waves A resonator filter working with surface acoustic waves is disclosed. The transfer function of this filter features a phase rotation of at least 400° within a passband. ... | 09/27/2011 |
| 8013692 | Boundary acoustic wave device A boundary acoustic wave device includes an electrode structure that is provided at the interface between a piezoelectric substrate and a dielectric layer. The electrode structure defines a ladder filter in which at least two ground pads of a plurality of ground pad... | 09/06/2011 |
| 7999636 | DMS-filter with connected resonators A surface acoustic wave filter arrangement is described herein. The surface acoustic wave filter arrangement includes a first gate configured to operate symmetrically or asymmetrically, and a second gate configured to operate symmetrically. The filter arrangement al... | 08/16/2011 |
| 7986200 | Acoustic wave filter including first and second multimode filters with different aperture lengths An acoustic wave filter includes: a first acoustic wave filter having a first group of multimode filters connected, a first unbalanced input node and two first balanced output nodes, a first multimode filter among the first group of multimode filters being connected... | 07/26/2011 |
| 7969259 | Electronic component operated with surface acoustic waves An apparatus includes a piezoelectric substrate having a signal line with a first electrical port and a second electrical port, and a first partial filter connected in series with a second partial filter. The partial filters are arranged between the electrical ports... | 06/28/2011 |
| 7948333 | Component operated by guided acoustic waves A component working with guided acoustic waves includes a layer system configured to guide waves in a lateral plane. The layer system includes a piezoelectric layer, electrodes on the piezoelectric layer for exciting the wave, a dielectric layer with an acoustic imp... | 05/24/2011 |
| 7944329 | Acoustic wave filter device with branched ground wiring sandwiching the IDT area An acoustic wave filter device has a balance-unbalance conversion function and has an increased out-of-band attenuation. The acoustic wave filter device includes a 5-IDT-type longitudinally coupled resonator-type acoustic wave filter unit including IDTs that are con... | 05/17/2011 |
| 7940146 | Boundary acoustic wave element, boundary acoustic wave device, and manufacturing methods for the same A boundary acoustic wave element includes an IDT electrode arranged at the interface between a piezoelectric substance and a dielectric layer, a heat dissipation film is arranged on the outer side surface of the dielectric layer or on the outer side surface of a sou... | 05/10/2011 |
| 7915975 | DMS filter with improved matching For improving the matching of a DMS track that is connected in series with a reactance element, it is proposed to connect a shunt branch to ground between the DMS track and reactance element parallel to the signal-carrying conductor section, where a capacitive eleme... | 03/29/2011 |
| 7898365 | Integrated saw device heater An integrated SAW device features an electronic assembly, a SAW device mounted to the electronic assembly, and a heater element on the SAW device to minimize thermal resistance between the SAW device and the heater element. ... | 03/01/2011 |
| 7876179 | Saw filter comprising a broadband band-stop filter A band-stop filter is described herein. The band-stop filter includes a piezoelectric substrate and a plurality of surface wave element (SAW) impedance elements on the substrate. The band-stop filter also includes at least one series branch comprising at least one s... | 01/25/2011 |
| 7876178 | Composite filter comprising a surface acoustic wave filter and an LC filter A composite filter downsized without degrading its characteristics is disclosed. The filter includes a surface acoustic wave filter and an LC filter coupled to the surface acoustic wave filter. The LC filter is formed by combining a π-shaped LC filter formed of two... | 01/25/2011 |
| 7868717 | Acoustic wave transducer and filter comprising said transducer A transducer includes an acoustic track in which an acoustic wave can be propagated, the acoustic track having a transversal fundamental mode, the acoustic track being subdivided in a transversal direction into an excitation area and two peripheral areas. The transd... | 01/11/2011 |
| 7855619 | Electronic part and electronic equipment with electronic part An electronic part, an 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 surface of the substrate (1), and a protective film ( | 12/21/2010 |
| 7847657 | Longitudinally coupled resonator-type surface acoustic wave filter Disclosed is a surface acoustic wave filter comprising two or more IDTs arranged in a propagation direction of the surface acoustic wave, wherein said two or more IDTs include at least one pair of IDTs arranged adjacent to each other in order to be acoustically coup... | 12/07/2010 |
| 7821360 | Multi-channel surface acoustic wave filter device with voltage controlled tunable frequency response A multi-channel surface acoustic wave (SAW) filter includes a voltage controlled velocity tunable piezoelectric substrate, an input transducer fabricated on the substrate, and an output transducer fabricated on the substrate. The input transducer further includes mu... | 10/26/2010 |
| 7808344 | Boundary acoustic wave filter A longitudinally coupled resonator boundary acoustic wave filter device includes a piezoelectric substrate made of LiNbO3 having a principal plane obtained by rotating the Y-axis through about 15 degrees +−10 degrees, a dielectric substrate made of sili... | 10/05/2010 |
| 7804384 | Acoustic wave filter device utilizing filters having different acoustic wave propagation directions An acoustic wave filter device having a balanced-to-unbalanced conversion function, in which the signal balance between a pair of balanced terminals is improved, has, on a piezoelectric substrate, one end of at least one longitudinally coupled resonator type acousti... | 09/28/2010 |
| 7800464 | Surface acoustic wave device and duplexer A surface acoustic wave device includes a supporting substrate, a LiTaO3 piezoelectric substrate joined on the supporting substrate, which has a normal line direction on a main surface thereof in a direction rotated 43° to 53° from a Y axis to a Z axis direction a... | 09/21/2010 |
| 7800463 | Band pass filter A band pass filter includes partial filters, each of which has a pass band. Pass bands of different ones of the partial filters have center frequencies that are different. A partial filter with a lowest center frequency has a pass band with a first low-frequency edg... | 09/21/2010 |
| 7795999 | Filter having multiple surface acoustic wave filters connected in parallel A filter includes a first filter that is connected between an input node and an output node and is a surface acoustic wave filter, and a second filter that is provided between the input node and the output node and is connected in parallel with the first filter. The... | 09/14/2010 |
| 7772942 | Elastic wave filter utilizing a sub-propagation mode response to increase out of band attenuation An elastic wave filter of a resonator type includes at least one IDT electrode arranged so as to contact the piezoelectric substance. The elastic wave filter is arranged such that an elastic wave in a main propagation mode for obtaining target frequency characterist... | 08/10/2010 |
| 7760048 | Elastic wave filter and communication device equipped with the elastic wave filter An elastic wave filter includes two longitudinally coupled resonator type elastic wave filter elements that are cascade connected with each other, each longitudinally coupled resonator type elastic wave filter element including three IDTs (interdigital transducers) ... | 07/20/2010 |
| 7760049 | Film bulk acoustic resonator, filter, and fabrication method thereof A film bulk acoustic resonator includes a substrate; an acoustic reflector portion formed on the substrate; and an acoustic resonator portion including a lower electrode, a piezoelectric film, and an upper electrode which are sequentially stacked on the acoustic ref... | 07/20/2010 |
| 7755455 | Saw filter frequency characteristic control An apparatus in one example comprises an insulating piezoelectric layer, a base electrode along a first side of the insulating piezoelectric layer, and at least one gradient electrode along a second side of the insulating piezoelectric layer. The at least one gradie... | 07/13/2010 |
| 7746199 | Acoustic wave device An acoustic wave device includes first and second 3-IDT acoustic wave filters provided on a piezoelectric substrate. A second IDT in the first acoustic wave filter is electrically connected to a second IDT in the second acoustic wave filter and a third IDT in the fi... | 06/29/2010 |
| 7728697 | Systems and methods for electrically reducing ferroelectric materials to increase bulk conductivity According to some embodiments, a pre-poled, single-domain body of a ferroelectric crystalline material such as lithium tantalate or lithium niobate is electrically reduced by applying a voltage across the body in a non-oxidizing environment while the body is heated ... | 06/01/2010 |
| 7710221 | Elastic wave device In an elastic wave device including an input side electrode and an output side electrode being a resonant single-phase unidirectional transducers (RSPUDT) provided with respective pairs of bus bars opposing to each other on a piezoelectric substrate and a number of ... | 05/04/2010 |
| 7710220 | Surface acoustic wave device A surface acoustic wave device includes a base portion that surrounds a surface acoustic wave element and is made of a resin, and a cap portion that is adhered onto the base portion so that a cavity sealing the surface acoustic wave element is formed, and is made of... | 05/04/2010 |
