| Patent Number |
Title Of Patent |
Date Issued |
| 7324493 |
3-frequency branching circuit, branching circuit and radio communication equipment |
January 29, 2008 |
| A 3-frequency branching circuit in the past could not be used for a system wherein a TDMA method such as GSM and DCS and a W-CDMA method such as UMTS are mixed. The 3-frequency branching circuit equipped with branching means having first and second internal terminals, an antenna terminal |
| 7274570 |
Electronic component mounting board, electronic component module, method of manufacturing electr |
September 25, 2007 |
| A ceramic laminated board is provided which has thermal via holes penetrating the inside from the main face of the board. In the thermal via hole, a heat transfer body is placed which has a metallic body and a composite material provided entirely or partially between the metallic bod |
| 7224240 |
Balanced high-frequency filter, antenna duplexer, balanced high-frequency circuit and communicat |
May 29, 2007 |
| With an antenna duplexer having balanced terminals, there has been a problem that the amount of leakage of common-mode signal components in the balanced terminals is large. A balanced high-frequency filter designed to solve this problem comprises a balanced high-frequency element and |
| 7176768 |
Balanced high-frequency device and balanced high-frequency circuit using the same |
February 13, 2007 |
| A balanced high-frequency device includes a balanced element; at least one balanced terminal connected to the balanced element; a phase circuit having at least first, second, and third impedance elements, and electrically connected between the balanced element and the balanced termin |
| 7138888 |
Filter using piezoelectric resonator |
November 21, 2006 |
| A series piezoelectric resonator is connected in series between an input terminal and an output terminal. A first electrode of a first parallel piezoelectric resonator is connected to a connection point between the input terminal and the series piezoelectric resonator, and a second e |
| 7127215 |
Transmitting/receiving switch |
October 24, 2006 |
| A transmitting/receiving switch, in which a transmission terminal connected to a transmission circuit is connected to an antenna terminal through a first switching element, a filter for attenuating harmonic contents in a transmission signal, a phase-shift circuit for significantly in |
| 7109531 |
High frequency switch, two-band type high frequency switch, three-band type high frequency switc |
September 19, 2006 |
| A high frequency switch, has a transmitting terminal, a receiving terminal, an antenna terminal, a first diode having an anode electrically connected to the transmitting terminal and a cathode electrically connected to the antenna terminal, a second diode having an anode connected th |
| 7106152 |
Dielectric resonator, dielectric filter, and method of supporting dielectric resonance element |
September 12, 2006 |
| A dielectric resonator has a metallic casing having an opening, a metallic cover which covers the opening, and a dielectric resonance element having a pair of flat surfaces formed opposite from each other, one of the pair of flat surfaces being brought into contact with a bottom portion |
| 7054608 |
Multilayer electronic component and communication apparatus and method |
May 30, 2006 |
| A multilayer electronic component has a multilayered product laminating a plurality of dielectric sheets as one piece, a plurality of grounded electrodes provided among the dielectric sheets being different inside the multilayered product, and inductor electrodes provided on the di |
| 7038557 |
Antenna duplexer and mobile communication device using the same |
May 2, 2006 |
| An antenna duplexer has an antenna terminal; a transmitting phase-shift circuit, one side of which is connected to the antenna terminal; a receiving phase-shift circuit, one side of which is connected to the antenna terminal; a transmitting filter connected to the other side of the |
| 7027777 |
High frequency switch and high frequency radio communication apparatus |
April 11, 2006 |
| A high frequency switch having a plurality of signal paths for four frequency bands, the high frequency switch, has branching means, first and second transmission reception changeover means connected to the branching means, and a plurality of filters placed in the plurality of sign |
| 6995636 |
In-band-flat-group-delay type dielectric filter and linearized amplifier using the same |
February 7, 2006 |
| A small in-band-flat-group-delay type dielectric filter having low-loss characteristics with a small amplitude deviation and uniform-group-delay frequency characteristics is obtained, which enables broad-band characteristics to be obtained easily. The in-band-flat-group-delay type di |
| 6995630 |
High-frequency compound switch module and communication terminal using it |
February 7, 2006 |
| A high-frequency compound switch module of this invention has a first communication system comprising a switch unit for switching connection of a signal from an antenna to one of a transmission circuit and a reception circuit of the first communication system based on a signal from a |
| 6985712 |
RF device and communication apparatus using the same |
January 10, 2006 |
| An RF device includes a first substrate having a lower relative dielectric constant, a first RF circuit for a lower frequency band provided in the first substrate, a second substrate having a higher relative dielectric constant larger than the lower relative dielectric constant, and a se |
| 6975841 |
Diplexer, and high-frequency switch and antenna duplexer using the same |
December 13, 2005 |
| A diplexer capable of passing signals of a high frequency band without being attenuated over a wide frequency band, and a high-frequency switch using the diplexer are provided. The diplexer includes a low-pass filter 82 having a parallel resonant circuit formed by a first capacitor C1 an |
| 6975271 |
Antenna switch module, all-in-one communication module, communication apparatus and method for m |
December 13, 2005 |
| To realize high pressure-tightness and improvement in a high-frequency characteristic due to a low impedance between a shunt FET and a ground of a FET switch circuit. An antenna switch module comprising a switch circuit for switching between transmitting and receiving of a signal between |
| 6965284 |
Dielectric filter, antenna duplexer |
November 15, 2005 |
| A dielectric filter includes resonator electrodes, an inter-stage coupling capacitor electrode, and an input/output coupling capacitor electrode on dielectric substrates, respectively. The resonator electrodes are electro-magnetically coupled to each other to form a tri-plate structure, |
| 6941650 |
Method for manufacturing dielectric laminated device |
September 13, 2005 |
| By using a method for manufacturing a dielectric laminated device, an opening is formed on a first dielectric sheet, a strip line and an input and output line including an input and output electrode are formed by burying electrode materials in said opening, the first dielectric sheet is |
| 6900705 |
Balanced high-frequency device and balance-characteristics improving method and balanced high-fr |
May 31, 2005 |
| A balanced high-frequency device is constituted by a balanced device and a phase circuit. The input side of the balanced device is connected to an input terminal IN serving as an unbalanced input/output terminal and the output side of it is connected to output terminals OUT1 and OUT2 ser |
| 6882250 |
High-frequency device and communication apparatus |
April 19, 2005 |
| Interdigital transducers (IDT electrodes), reflectors, etc., are formed on a piezoelectric substrate. An unbalanced input/output terminal is connected to a first input/output terminal. A first inductor is connected between a first terminal, which is one of the balanced input/output t |
| 6835968 |
High frequency switch, two-band type high frequency switch, three-band type high frequency switc |
December 28, 2004 |
| A high frequency switch, has a transmitting terminal; a receiving terminal; an antenna terminal; a first diode having an anode electrically connected to the transmitting terminal and a cathode electrically connected to the antenna terminal; a second diode having an anode connected |
| 6822534 |
Laminated electronic component, laminated duplexer and communication device |
November 23, 2004 |
| A laminated filter includes: a first dielectric layer having a first shield electrode on one principal plane; a second dielectric layer having resonator electrodes on one principal plane; a third dielectric layer having a coupling electrode provided facing part of the above-described |
| 6809611 |
Composite filter, antenna duplexer, and communication apparatus |
October 26, 2004 |
| A composite filter has a dielectric notch filter; and a first surface acoustic wave filter. An attenuation band of the dielectric notch filter and an attenuation band of the first surface acoustic wave filter have at least a common band portion; and the dielectric notch filter and the |
| 6801100 |
Inter-digital transducer, surface acoustic wave filter and communication apparatus using the sam |
October 5, 2004 |
| An inter-digital transducer has a piezoelectric substrate; and an IDT (inter-digital transducer) electrode having a pair of upper bus bar electrode and lower bus bar electrode placed facing each other on the piezoelectric substrate and a plurality of electrode fingers placed on the p |
| 6794959 |
In-band-flat-group-delay type dielectric filter and linearized amplifier using the same |
September 21, 2004 |
| A small in-band-flat-group-delay type dielectric filter having low-loss characteristics with a small amplitude deviation and uniform-group-delay frequency characteristics is obtained, which enables broad-band characteristics to be obtained easily. The in-band-flat-group-delay type di |
| 6784765 |
Multilayer ceramic device |
August 31, 2004 |
| A mulitlayer ceramic device improves device functionality, reduces overall device size and profile, makes manufacturing easier, and improves reliability. A first ceramic layer 1 has a first multilayer circuit pattern 2 electrically connected through via holes 3. A second ceramic laye |
| 6784759 |
Antenna duplexer and communication apparatus |
August 31, 2004 |
| An antenna duplexer has a receiving filter having a surface acoustic wave device; a transmitting filter having a dielectric resonator; and a matching circuit for matching the receiving filter and the transmitting filter with an antenna respectively, wherein the transmitting filter, r |
| 6768399 |
Laminated bandpass filter, high frequency radio device and laminated bandpass filter manufacturi |
July 27, 2004 |
| The present invention provides a small and low loss laminated bandpass filter by placing two strip lines 313 and 314 that form a resonator in a certain distance on the same layer and thereby electromagnetically coupling these strip lines. |
| 6765460 |
Dielectric laminated device including a buried electric conductive member to form a strip line a |
July 20, 2004 |
| By using a method for manufacturing a dielectric laminated device, an opening is formed on a first dielectric sheet, a strip line and an input and output line including an input and output electrode are formed by burying electrode materials in said opening, the first dielectric sheet is |
| 6759916 |
High-frequency filter device, filter device combined to a transmit-receive antenna, and wireless |
July 6, 2004 |
| A high-frequency filter device includes at least one filter to be connected to a high-frequency stage of a wireless apparatus. The filter includes a voltage-controlled variable frequency resonance element which is made of a resonance element and a voltage-controlled variable impedance el |
| 6750737 |
High frequency switch and radio communication apparatus with layered body for saw filter mountin |
June 15, 2004 |
| A layered body of a SAW filter includes a surface dielectric layer having a surface layer electrode pattern formed thereon, and a first dielectric layer having a pair of electrode patterns and a first ground electrode pattern formed thereon. A pair of balanced output terminals of SAW fil |
| 6747528 |
Dielectric filter, antenna duplexer, and communications appliance |
June 8, 2004 |
| A dielectric filter including a plurality of resonators, and at least one transmissions line provided among said plurality of resonators. A band rejection characteristic is formed around a resonance frequency of said resonator, and a line length of said transmission line is shorter than |
| 6710683 |
Surface acoustic wave filter and communications apparatus using the same |
March 23, 2004 |
| 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 bidirectional electrode, and the lengt |
| 6707353 |
Dielectric filter |
March 16, 2004 |
| In order to prevent filter characteristics from being deteriorated due to generation of a spurious pulse is unnecessary resonance at a high level in a passing band at the frequency in a microwave region used in a portable telephone system or the like, at least two types of dielectric res |
| 6608534 |
Matching circuit chip, filter with matching circuit, duplexer and cellular phone |
August 19, 2003 |
| The present matching circuit chip has an integrated shape comprising a first transmission line, a second transmission line and a third transmission line, wherein one end of the first transmission line, one end of the second transmission line and one end of the third transmission line |
| 6608533 |
Matching circuit chip, filter with matching circuit, duplexer and cellular phone |
August 19, 2003 |
| The present matching circuit chip has an integrated shape comprising a first transmission line, a second transmission line and a third transmission line, wherein one end of the first transmission line, one end of the second transmission line and one end of the third transmission line |
| 6603372 |
Laminated notch filter and cellular phone using the same |
August 5, 2003 |
| A notch filter made up from laminated dielectric, which attenuates a specific frequency of a signal to be transmitted, comprises two terminals for input or output a signal to be transmitted, a line connected between those terminals, two resonators each having one end connected to ground |
| 6586786 |
High frequency switch and mobile communication equipment |
July 1, 2003 |
| A high frequency switch, has a transmitting terminal; a receiving terminal; an antenna terminal; a first diode having an anode electrically connected to the transmitting terminal and a cathode electrically connected to the antenna terminal; a second diode having an anode connected |
| 6577205 |
High-frequency filter device, filter device combined to a transmit-receive antenna, and wireless |
June 10, 2003 |
| A high-frequency filter device includes at least one filter to be connected to a high-frequency stage of a wireless apparatus. The filter includes a voltage-controlled variable frequency resonance element which is made of a resonance element and a voltage-controlled variable impedance el |
| 6570469 |
Multilayer ceramic device including two ceramic layers with multilayer circuit patterns that can |
May 27, 2003 |
| A multilayer ceramic device improves device functionality, reduces overall device size and profile, makes manufacturing easier, and improves reliability. A first ceramic layer has a first multilayer circuit pattern electrically connected through via holes. Also, a second ceramic layer ha |
| 6529096 |
Dielectric filter, antenna duplexer, and communications appliance |
March 4, 2003 |
| A dielectric filter including a plurality of resonators, and at least one transmission line provided among said plurality of resonators. A band rejection characteristic is formed around a resonance frequency of the resonator, and a line length of the transmission line is shorter than 1/4 |
| 6515559 |
In-band-flat-group-delay type dielectric filter and linearized amplifier using the same |
February 4, 2003 |
| A small in-band-flat-group-delay type dielectric filter having low-loss characteristics with a small amplitude deviation and uniform-group-delay frequency characteristics is obtained, which enables broad-band characteristics to be obtained easily. The in-band-flat-group-delay type di |
| 6510607 |
Method for forming a dielectric laminated device |
January 28, 2003 |
| By using a method for manufacturing a dielectric laminated device, an opening is formed on a first dielectric sheet, a strip line and an input and output line including an input and output electrode are formed by burying electrode materials in said opening, the first dielectric sheet is |
| 6456172 |
Multilayered ceramic RF device |
September 24, 2002 |
| A multilayered ceramic RF device having at least one radio frequency filter includes a low temperature-cofired multilayered ceramic body having a plurality of ceramic layers laminated one upon another and fired together. The low temperature-cofired multilayered ceramic body also has a fi |
| 6445266 |
Multilayer filter having varied dielectric constant regions |
September 3, 2002 |
| A small multilayer filter, in which a phase shifter may be constituted without increasing overall size of the filter. The overall size may be reduced without deteriorating the characteristics. Above the open end of a plurality of strip lines 4A provided on a dielectric layer 4, a couplin |
| 6414572 |
Dielectric resonator having a frequency tuning member spirally engaged with the cavity |
July 2, 2002 |
| A dielectric resonator of the invention includes a cavity having a first threaded hole; a dielectric block provided in the cavity; a coupling device coupled with an electromagnetic field produced in the cavity; a frequency tuning member having a screw portion which is spirally engaged |
| 6359531 |
Multilayer filter with electrode patterns connected on different side surfaces to side electrode |
March 19, 2002 |
| A small multilayer filter, in which a phase shifter may be constituted without increasing overall size of the filter. The overall size may be reduced without deteriorating the characteristics. Above the open end of a plurality of strip lines 4A provided on a dielectric layer 4, a couplin |
| 6351196 |
Surface acoustic wave filter and multistage surface acoustic wave filter |
February 26, 2002 |
| Disclosed is a surface acoustic wave filter on a piezoelectric substrate. The filter includes at least two surface acoustic wave resonators that each has a reflector electrode on both sides of an IDT electrode as an inter-digital transducer electrode. At least two of the resonators are |
| 6348845 |
Surface acoustic wave filter and multistage surface acoustic wave filter |
February 19, 2002 |
| A surface acoustic wave resonator is constituted by an IDT electrode and reflector electrodes disposed on both sides thereof, on a piezoelectric substrate. Two of said surface acoustic wave resonators are disposed nearby so that the propagation directions of the respective surface ac |
| 6346866 |
Dielectric laminated device and its manufacturing method |
February 12, 2002 |
| By using a method for manufacturing a dielectric laminated. device, an opening is formed on a first dielectric sheet, a strip line and an input and output line including an input and output electrode are formed by burying electrode materials in said opening, the first dielectric sheet is |
