Did You Know...
...that the Slinky toy was the result of a failed attempt by engineer Richard James to produce an antivibration device for ship instruments? His goal was to develop a spring that would instantaneously counterbalance the wave motion that rocks a ship at sea. Instead, he developed the Slinky.
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| Number | Title | Issue Date |
| 7372897 | Portable information communication terminal, program, and recording medium The number of times for averaging operation for averaging a correlation value of a received signal and a reference signal is properly controlled. When the correlation value is not averaged, since a lower limit value TH_A of a correlation level of a distribution of t... | 05/13/2008 |
| 7362033 | Surface-acoustic-wave device A surface-acoustic-wave device includes a piezoelectric substrate and first and second comb-shaped electrodes each having a bus-bar portion parallel to a propagation direction of a surface acoustic wave in the substrate. Respective electrode fingers are periodically... | 04/22/2008 |
| 7352800 | Method of partial parallel interference cancellation A method of Partial Parallel Interference Cancellation (PPIC) is provided for recursively eliminating the Multiple Access Interference from a received signal. Such method is to use a recursion way to eliminate all the Multiple Access Interference (MAI) one by one fr... | 04/01/2008 |
| 7250832 | Method for realizing surface acoustic wave filter arrangements and filter arrangement obtained in accordance to this method The invention relates to a method for realizing surface acoustic wave filter arrangements of the kind comprising a piezo-electric substrate and on said substrate metallic strip elements constituting impedance filter elements arranged in a network scheme. In such an ... | 07/31/2007 |
| 7221074 | Surface acoustic device A surface acoustic wave device includes a piezoelectric substrate, a first and a second interdigital transducers (IDTs) provided on the piezoelectric substrate. The first IDT includes multiple tracks having different frequency characteristics that are connected in p... | 05/22/2007 |
| 7187251 | DC isolated phase inverter and a ring hybrid coupler including the DC isolated phase inverter A direct current (DC) isolated phase inverter and a ring hybrid coupler including the DC isolated phase inverter is provided. The ring hybrid coupler including the DC isolated phase inverter comprising: a first, second, third and fourth transmission line arm; a firs... | 03/06/2007 |
| 7170372 | Converter for surface waves with improved suppression of interfering excitation An electro-acoustic transducer for a component operating with surface waves, in particular for a surface wave filter, in which, to suppress interfering excitation ensuing in the gap region adjacent an end of a finger, a variation of the gaps is implemented with rega... | 01/30/2007 |
| 7132778 | Surface acoustic wave modulator An acoustic wave identification transponder device, having a substrate, an electroacoustic transfer generating an acoustic wave in said substrate and a set of encoding elements disposed in a path of the acoustic wave for modifying the acoustic wave, having elements ... | 11/07/2006 |
| 7082294 | Self-adaptive frequency band-pass filtering device in microwave signal transceiver The present invention relates to a self-adaptive band-pass filtering device in a microwave signal transmitter and/or receiver, the receiver being connected to a microwave signal receiving antenna connected to the input of a low-noise amplifier, a mixer that receives... | 07/25/2006 |
| 7053524 | Surface acoustic wave sensor or identification device with biosensing capability A surface acoustic wave sensor or identification device has a piezoelectric material, and an interdigitated transducer (IDT) input/output mounted on the piezoelectric material for receiving a radio frequency (RF) signal and propagating a corresponding surface acoust... | 05/30/2006 |
| 7042132 | Transducer structure that operates with acoustic waves For improved conformance of a filter operating with acoustic waves, a transducer structure is provided in which the separations between respectively two adjacent electrode fingers of an inter-digital transducer (IDTv) vary over the length of the transduce... | 05/09/2006 |
| 7038560 | Surface acoustic wave filter and surface acoustic wave resonator having bent electrode fingers A SAW filter including a piezoelectric substrate 11, an input electrode 12 and an output electrode 13 each representing an interdigital electrode disposed on the piezoelectric substrate 11 and two reflectors 14 and 14 dispos... | 05/02/2006 |
| 6992547 | Surface acoustic wave arrangement for broadband signal transmission A surface acoustic wave arrangement has at least two interdigital transducers being provided on a piezoelectric substrate along an acoustic path, with at least one of the interdigital transducers being a fan transducer which is divided in a transverse direction into... | 01/31/2006 |
| 6967428 | Selectable reflector arrays for SAW sensors and identification devices A surface acoustic wave sensor or identification device has a piezoelectric substrate, an interdigitated transducer (IDT) input/output mounted on a substrate for receiving a radio frequency (RF) signal and propagating a corresponding surface acoustic wave along a su... | 11/22/2005 |
| 6967545 | Saw wave-guides Surface acoustic wave (SAW) zebra-wave-guide (10) implemented as an array of interdigitized electrode fingers, wherein the array has internal inter-finger connectors (18) providing inside electrical shorting of part of fingers (16) remaining oth... | 11/22/2005 |
| 6956998 | Compact optical delay lines The present invention provides an optical delay, for example, an optical delay line, having at least first and second waveguides, each waveguide having a first end at a first side of the device and a second end at a second side of the device, wherein the second end ... | 10/18/2005 |
| 6937114 | Surface acoustic wave device, electronic component using the device, and composite module A surface acoustic wave device includes a piezoelectric substrate and an electrode provided on the substrate. The electrode includes a first metal layer provided on the piezoelectric substrate and having a trapezoid shape in the cross section and a second metal laye... | 08/30/2005 |
| 6856214 | Surface wave devices with low passband ripple Very low passband ripple is provided in a wide bandwidth high frequency SAW FIR filter using slanted finger IDTs by one or more of three techniques: cancelling regenerated SAWs at parallel-connected input IDTs of two SAW filters which are similar except for a quarte... | 02/15/2005 |
| 6815867 | Substrate usable for an acoustic surface wave device, a method for fabricating the same substrate and an acoustic surface wave device having the same substrate A base material made of C-faced sapphire single crystal is set on a susceptor installed in a reactor arranged horizontally. Then, a trimethyl-aluminum and an ammonia are introduced as raw material gases into the reactor and supplied onto the substrate, to form an Al... | 11/09/2004 |
| 6788204 | Surface-wave transducer device and identification system with such device The invention relates to a surface-wave transducer device—also called TAGs—and to identification systems with this device. DE 42 17 049 discloses a passive surface sensor which can be interrogated in wireless mode. In this context, energy is transmitted b... | 09/07/2004 |
| 6727767 | Voltage controlled oscillator with two layered mounting structure A voltage controlled oscillator is provided. The oscillator includes a surface acoustic wave element for forming a feedback circuit for an amplifier, and a phase adjustment circuit including a filter which is interposed in the feedback circuit. The oscillator also h... | 04/27/2004 |
| 6710683 | Surface acoustic wave filter and communications apparatus using the same A surface acoustic wave filter has a piezoelectric substrate and at least two interdigital transducer electrodes on the piezoelectric substrate, wherein at least one of the interdigital transducer electrodes includes a unidirectional electrode and bidirection... | 03/23/2004 |
| 6640636 | Ultrasound radiating and receiving device An ultrasound radiating and receiving device comprises a piezoelectric substrate, an interdigital arrangement of first and second comb-shaped electrodes, and a counter electrode. The interdigital arrangement is mounted on an upper end surface of the piezo... | 11/04/2003 |
| 6407650 | Surface acoustic wave shaping system A system (200) for transmitting and focusing surface acoustic waves (208) along a substrate (206) is disclosed. The system (200) comprising a curved transmission element (202) that is disposed upon the substrate (206). The curved transmission element (202... | 06/18/2002 |
| 6391675 | Method and apparatus for switching high frequency signals A switch includes a conductive region, a membrane, and a dielectric region. The dielectric region is formed from a dielectric material and is disposed between the membrane and the conductive region. When a sufficient voltage is applied between the conduct... | 05/21/2002 |
| 6320479 | Magnetostrictive surface acoustic wave devices having optimized transducers In accordance with the invention, magnetostrictive saw devices are provided with improved transducer structures for enhanced performance. In one improved device, the transducers are in the form of gratings with interconnected ends for reduced resistance a... | 11/20/2001 |
| 6275123 | Surface acoustic wave matched filter with dispersive substrate and saw group velocity based output electrode design A surface acoustic wave matched filter for use in a spread spectrum communication system is disclosed. The surface acoustic wave matched filter includes a substrate having dispersity and is composed of a sapphire main body and a piezoelectric aluminum nit... | 08/14/2001 |
| 6229409 | Surface acoustic wave matched filter An output side electrode of a surface acoustic wave matched filter with portions having different delay times between taps. The output side electrode may be provided by arranging parallelly a plurality of output side electrodes having different scales, di... | 05/08/2001 |
| 6075898 | Reflective array compressor A reflective array compressor for a fast pattern recognition system. The system includes a combination of digital and analog processing circuitry which allows the system to achieve super computing processing speeds within an open personal computer archite... | 06/13/2000 |
| 6072377 | Surface acoustic wave device with multiple connecting routes for connecting fingers to bus bars A surface acoustic wave device includes a piezoelectric substrate, and comb-shaped electrodes each having a bus bar and a plurality of electrode fingers disposed on the piezoelectric substrate. At least one of the fingers and the bus bar are connected to ... | 06/06/2000 |
| 6011344 | Surface acoustic wave transducer driven in differential mode The transducer according to the invention, driven in differential mode, consists of at least a first transducer (5) and a second transducer (6) which are connected in parallel so as to obtain the symmetry of the differential inputs, respectively forming a... | 01/04/2000 |
| 5925967 | Ultrasonic switching device An ultrasonic switching device comprises a piezoelectric substrate, and an input- and an output interdigital transducers formed on an upper end surface of the piezoelectric substrate. The output interdigital transducer has a finger-overlap zone Ri | 07/20/1999 |
| 5905449 | Radio switching apparatus A radio switching apparatus is provided which is actuated upon reception of a radio signal and which is capable zero or near-zero standby electric power consumption. The radio switching apparatus includes a receiving antenna; a surface-acoustic-wave devic... | 05/18/1999 |
| 5872520 | Identification and/or sensor system An identification and/or sensor system includes a sensor that queries an identification and/or sensor configuration which contains resonators. A receiver receives an answer signal from the identification and/or sensor configuration. The receiver includes ... | 02/16/1999 |
| 5841214 | Identification mark operating with acoustic surface waves An identification mark operating with acoustical surface waves includes at least one reflector having higher reflectivity than a reflectivity of other reflectors.... | 11/24/1998 |
| 5793146 | Surface acoustic wave transducer having selected reflectivity An improved surface acoustic wave device that utilizes M electrodes per each N transduction length(s) of a transducer that produces a desired net internal distributed reflectivity in both magnitude and phase. Two of the transducers can be made placed on a... | 08/11/1998 |
| 5703427 | Surface-wave distributed acoustic reflection transducer and filter including such a transducer The distributed acoustic reflection transducer has a reflection function which includes at least one reversal of sign, that is to say it possesses at least one reflector and, in general, a combination of reflectors, the center of which is at a distance of... | 12/30/1997 |
| 5691698 | Identification and/or sensor system An identification and/or sensor system includes an identification and/or sensor configuration having resonators for determining at least one parameter to be interrogated. The resonators have a quality being good enough to effect a storage of energy in the... | 11/25/1997 |
| 5644598 | Switching arrangement for coupling a transmitting unit to a transmission line A switching arrangement is provided for coupling a transmitting unit to a transmission line. According to the present invention, a transformer is provided, whose secondary winding is a portion of the transmission line and whose primary winding is connecte... | 07/01/1997 |
| 5550793 | Unidirectional wave transducer The invention concerns unidirectional ground-wave transducers using an alternating series of emitter cells (E) and reflector cells (R). The invention consists in using, in the emitter cells (E), fingers having a width of λ/3 spaced apart by a distance of 2 λ... | 08/27/1996 |
