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Matches 451 - 500 out of 2,125

Document Document Title
JP2008277996A
To provide a variable capacitance capacitor which can easily control the characteristics, and to provide a filter circuit.The variable capacitance capacitor includes a variable capacitance element group, comprising a plurality of variabl...  
JP2008263157A
To provide an electret element which can inhibit a charge accumulated in an electret film from being reduced.The electret element 100 includes an electret film 3 into which an electron is injected and a barrier film 4 which is located on...  
JP2008258670A
To provide an antenna device that realizes transmission and reception, in a frequency band having a wide bandwidth.The antenna device is equipped with a variable capacitance capacitor C2 using a dielectric material, a capacitor C1 connec...  
JP2008258186A
To provide a compact variable capacity device having a high continuously variable capacity ratio.The variable capacity device comprises a variable capacity capacitor employing a ferroelectric material, a capacitor connected in series wit...  
JP2008252340A
To provide a tunable filter which is capable of efficiently varying a coupling capacitance between resonators with a simple structure and is suitable for integration.In the tunable filter 10, by arranging the two or more resonators 12a a...  
JP4157375B2  
JP2008228315A
To provide a preferable integrated ceramic inverted-F ferroelectric antenna.The inverted-F ferroelectric antenna includes a counterpoise 102, a ceramic block, an inverted-F structure radiator 104, a bias voltage feed 300 metal inlay, a g...  
JP2008219900A
To provide a narrowband resonant circuit for measuring the loss of the ferroelectric component.A tunable ferroelectric component (610 to 614) and a narrowband resonant circuit (610 to 620) for measuring the loss of the ferroelectric comp...  
JP2008211064A
To provide a variable-capacity capacitor array that is excellent in controllability of a capacity value and has no change in tunability, and a variable-capacity capacitor relay.The variable-capacity capacitor array is provided with a plu...  
JP4142128B2  
JP4141679B2  
JP4142127B2  
JP4121362B2  
JP2008167474A
To provide FE dielectric-tuned antennas and a method for frequency tuning a wireless communications antenna.The method comprises forming a radiator; forming a dielectric with ferroelectric material proximate to the radiator; applying a v...  
JP2008159661A
To provide a wanted variable capacitance range by combining a plurality of capacitors while eliminating or decreasing the required number of switches.The variable capacitor comprises a first electrode provided at a fixed part including a...  
JP2008161036A
To provide an electrostatic induction type converter which improves conversion efficiency between kinetic energy and electrical energy.The electrostatic induction type power generator (electrostatic induction type converter) 300 includes...  
JP2008154240A
To provide a small and highly reliable resonator which is manufactured easily, and also to provide an electronic apparatus employing it.The present invention relates to a resonator comprising two acoustic impedance transducers T1, T2 and...  
JP4106034B2  
JP2008141171A
To provide an electret device capable of increasing the surface potential of an electret film composed of a silicon oxide film.An electret device 10 includes a silicon substrate 1 having a groove 1b on the main surface 1a thereof and an ...  
JP2008118070A
To provide a variable capacitance element in which the passage of direct current is prevented.The variable capacitor element comprises: a first capacitative element 3 that has plate electrodes 3a and 3b opposed to each other via a ferroe...  
JP2008112755A
To provide a new technique for making electret for a condensor microphone, capable of forming an electret of a dielectric film of a condensor microphone to be formed through micro-processing of a silicon substrate without laboring, and c...  
JP2008112781A
To provide an electret element capable of forming a region having high charge density on an electret film.The electret element 10 has: the electret film 2 capable of storing charge; and a charge outflow suppression film 3 that is formed ...  
JP2008516444A  
JP2008108862A
To enlarge a band which a capacitor can use.In the capacitor having a pair of electrodes and a dielectric sandwiched between a pair of the electrodes, a frequency with which orientation polarization of the dielectric dissipates is set to...  
JP2008098609A
To provide a tunable capacitor using an electrowetting phenomenon, which facilitates a fabrication process, provides good reliability and durability, and has no limitation on a tuning range.The tunable capacitor includes a first electrod...  
JP2008512973A  
JP4077322B2  
JP2008085291A
To suppress a leakage current and an electrostatic breakdown generated at a dielectric film step portion due to surface roughness of a dielectric film, and to improve insulation of a variable capacitance capacitor.A lower electrode layer...  
JP2008085081A
To provide a variable capacitor which has a large electrostatic capacity change to an applied voltage, and a high Q value.A first electrode layer 2 and a second electrode layer 3 are both formed of conductive material and provided confro...  
JP2008072740A
To provide an appropriate tunable multiplexer.The present invention provides a tunable ferro-electric multiplexer for use in CDMA communication devices. Tunable ferro-electric capacitors are used to tune the resonant frequencies of sever...  
JP2008066682A
To provide a variable capacitor capable of realizing both of lowering of a bias voltage and the maximization of an electrostatic capacitance changing rate.This variable capacitor comprises, a first capacitance portion which is formed by ...  
JP2008051511A
To optimize each stress of a diaphragm and a plate of a capacitance sensor.This manufacturing method of the capacitance sensor comprises the steps of depositing a film to be a diaphragm forming a movable electrode, heating the film to be...  
JP2008053563A
To suppress a capacity while overcoming the difficulty of micro-fabrication, and to secure satisfactory tunability.Organic solvent containing SiO2 is spin-coated on the main face of a high dielectric layer 16, and heating and removal tre...  
JP2008053400A
To provide an electret condenser that has reliability in humidity-proofing properties and the like improved.The electret condenser includes a polysilicon film 115 used as a fixed electrode, a polysilicon film 102 opposite to the polysili...  
JP2008506265A  
JP4053504B2  
JP2008042436A
To provide a method of manufacturing an electret capacitor headphone in which a sufficient polarization voltage can be obtained by electret without generating spark discharge.After the electret dielectric film (FEP) of each fixed pole 21...  
JP2008035569A
To provide an enhanced tunable f-e filter capable of providing a tunable range higher than a desired frequency domain through low I. L. and out-of-high-band rejection, and a method of designing the filter.The present invention quantifies...  
JP2008022585A
To provide an appropriate tunable multiplexer.A tunable ferro-electric multiplexer for use in CDMA communication device is provided. Tunable ferro-electric capacitors are used to tune the resonant frequencies of several resonators used i...  
JP2008021787A
To provide an electret having high electric charge storing performance, and to provide a manufacturing method thereof.The electret 12 consisting of an insulator film bearing electric charges has a reformed surface formed by reforming at ...  
JP2008021786A
To provide an electret having high electric charge storing performance, and to provide a manufacturing method thereof.In the electret 12 consisting of an insulator film bearing electric charges, the electric charges are distributed so th...  
JP2008016919A
To provide a sound response device having a small high sensitivity capacitor exhibiting stabilized characteristics through a simple arrangement.The sound response device 10 has a capacitor consisting of a fixed electrode film 12 and an o...  
JP2008005534A
To provide a suitable integrated inverted-F ferroelectric antenna.The integrated inverted-F ferroelectric antenna comprises a counterpoise 102, a ceramic block 110, an inverted-F structure radiator 104, a bias voltage feed metal inlaid, ...  
JP2008005535A
To provide a suitable coplanar inverted-F ferroelectric antenna.The coplanar inverted-F ferroelectric antenna 100 comprises a first dielectric layer 1000, a counterpoise layer 1002, an inverted-F radiator 1004, and capacitor circuits 101...  
JP2008005552A
To provide an apparatus improved to reduce leakage effects for a local oscillator in a direct down conversion receiver.A phase shift filter and the direct down conversion receiver which performs phase compensation are provided. A DC offs...  
JP4031367B2  
JP2007325321A
To provide an improved apparatus for reducing the leakage effect of a local oscillator in a direct down-conversion receiver. The present invention provides a phase shift filter and a direct down-conversion receiver which compensates a ph...  
JP2007534162A  
JP2007298297A
To provide an easily-miniaturizable machine electric conversion element and its manufacturing method, having low manufacturing cost, high heat resistance and high operation stability. A microphone capsule has a constitution equipped with...  
JP2007294736A
To provide a variable capacitance element in which a drop is suppressed in Q value due to voltage application at a desired frequency, and also, to provide a variable filter or the like in which insertion losses and phase characteristics ...  

Matches 451 - 500 out of 2,125