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Class Information
Number: 333/195
Name: Wave transmission lines and networks > Coupling networks > Electromechanical filter > Using surface acoustic waves > With wave-modifying means (e.g., reflectors, resonators, diffractors, multistrip couplers, etc.)
Description: Subject matter including structure for modifying the amplitude, phase velocity, or propagation path of surface acoustic wave energy along the wave propagation path.










Patents under this class:
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Patent Number Title Of Patent Date Issued
6909341 Surface acoustic wave filter utilizing a layer for preventing grain boundary diffusion Jun. 21, 2005
6909338 Ladder-type filter, branching filter, and communication device Jun. 21, 2005
6903631 SAW filter and electronic device including SAW filter Jun. 7, 2005
6903630 Surface acoustic wave device having a polarization inverted region Jun. 7, 2005
6903626 Surface acoustic wave element and duplexer having the same Jun. 7, 2005
6900705 Balanced high-frequency device and balance-characteristics improving method and balanced high-frequency circuit using the same May. 31, 2005
6894588 Resonator filter with improved adjacent channel selectivity May. 17, 2005
6891450 Surface acoustic wave filter, balanced type filter and communication device May. 10, 2005
6891451 Surface acoustic wave filter apparatus having different structure reflectors May. 10, 2005
6885491 Diffraction-optical component, illumination system and exposure system comprising such a diffraction-optical component as well as an exposure method employing such an exposure system Apr. 26, 2005
6882250 High-frequency device and communication apparatus Apr. 19, 2005
6882249 Surface acoustic wave device Apr. 19, 2005
6879225 Surface acoustic wave device Apr. 12, 2005
6879086 Surface acoustic wave apparatus and communication apparatus using the same Apr. 12, 2005
6876275 Surface acoustic wave device and communication device containing the same Apr. 5, 2005
6873227 Surface acoustic wave filter, surface acoustic wave device using the filter, and communication device using the filter or the device Mar. 29, 2005
6870302 Interdigital transducer, surface acoustic wave filter, and radio communication apparatus Mar. 22, 2005
6861927 Longitudinally coupled leaky surface acoustic wave resonator filter Mar. 1, 2005
6859117 Resonator filter cascade Feb. 22, 2005
6856214 Surface wave devices with low passband ripple Feb. 15, 2005
6856218 Surface acoustic wave device and communications apparatus using the same Feb. 15, 2005
6853270 Surface acoustic wave filter with split center IDT and specific weighting and communication apparatus Feb. 8, 2005
6853269 Surface acoustic wave filter and communication device using the filter Feb. 8, 2005
6847272 Weighted SAW reflector using distributed acoustic reflective dots Jan. 25, 2005
6844795 SAW filter with an improved attenuation characteristic at a frequency any multiple of an attenuation pole frequency at one or both sides of a pass band Jan. 18, 2005
6842091 Weighted SAW reflector grating using dithered acoustic reflectors Jan. 11, 2005
6836196 Surface acoustic wave apparatus utilizing a leaky surface acoustic wave Dec. 28, 2004
6836197 Dual track SAW reflector filter using weighted reflective gratings Dec. 28, 2004
6828878 Surface acoustic wave device and communication apparatus utilizing a resonator with a dummy electrode Dec. 7, 2004
6828879 Longitudinal coupled multiple mode surface acoustic wave filter Dec. 7, 2004
6819203 Surface acoustic wave filter device Nov. 16, 2004
6816034 Electronic part such as dielectric filter or duplexer and method of forming an electrode of such an electronic part Nov. 9, 2004
6816036 Surface acoustic wave filter and communication apparatus Nov. 9, 2004
6812812 Longitudinally coupled surface acoustic wave resonator filter Nov. 2, 2004
6809614 Surface acoustic wave device having balanced and unbalanced terminals and a delay line Oct. 26, 2004
6806619 Interdigital transducer, surface acoustic wave filter, and radio communication apparatus Oct. 19, 2004
6801100 Inter-digital transducer, surface acoustic wave filter and communication apparatus using the same Oct. 5, 2004
6798318 Hybrid leaky surface acoustic wave resonator filter Sep. 28, 2004
6791437 Symmetric dual mode surface acoustic wave filter having symmetric housing connections Sep. 14, 2004
6788204 Surface-wave transducer device and identification system with such device Sep. 7, 2004
6781478 Longitudinally coupled resonator type surface acoustic wave filter and communication apparatus incorporating the same Aug. 24, 2004
6781485 Surface acoustic wave filter Aug. 24, 2004
6781483 Surface acoustic wave filter Aug. 24, 2004
6774536 Surface acoustic wave device Aug. 10, 2004
6774747 Surface acoustic wave device Aug. 10, 2004
6771144 Surface acoustic wave filter with a threefold mode filter section and a resonator Aug. 3, 2004
6771145 Surface acoustic wave device Aug. 3, 2004
6768397 Surface acoustic wave filter with balanced and unbalanced terminals Jul. 27, 2004
6762657 Longitudinally coupled resonator-type surface acoustic wave filter Jul. 13, 2004
6759928 Surface acoustic wave device with divided interdigital transducers Jul. 6, 2004

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