Patents by Inventor Ikuo Tamaru
Ikuo Tamaru has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20230361447Abstract: A directional coupler splits an input signal received by an input terminal into four signals to be output to output terminals. The directional coupler includes couplers and phase shifters. The coupler is connected to the input terminal and splits the input signal into two signals to be output to terminals. The coupler splits a signal from the terminal into two signals to be output to the output terminals. The coupler splits a signal from the terminal into two signals to be output to the output terminals. The phase shifter is connected between the terminal and the coupler and advances the phase of the signal from the terminal. The phase shifter is connected between the terminal and the coupler and delays the phase of the signal from the terminal. The phase difference between output signals of the phase shifters is 180°±10°.Type: ApplicationFiled: July 17, 2023Publication date: November 9, 2023Inventor: Ikuo TAMARU
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Publication number: 20230006328Abstract: To provide a directional coupler in which a coupling characteristic is made even flatter. There are included an input terminal, an output terminal, a coupling terminal, a termination terminal, ground terminals, a main line, a first sub line, and a second sub line. The main line is electromagnetically coupled to sub lines (first sub line, second sub line). A phase conversion unit (low pass filter) is connected between the first sub line and the second sub line. Between a point between the coupling terminal and the termination terminal, and the ground terminals, a resonant circuit is connected in which an inductor, a capacitor, and a resistor are connected in series.Type: ApplicationFiled: September 14, 2022Publication date: January 5, 2023Inventor: Ikuo TAMARU
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Patent number: 10910690Abstract: A directional coupler that achieves flattening of a coupling characteristic and size reduction or miniaturization is used in a predetermined frequency band and includes a first terminal, a second terminal, a third terminal, a fourth terminal, a main line, and a sub line. The main line is connected between the first terminal and the second terminal. The sub line is connected between the third terminal and the fourth terminal. In the sub line, a low-pass filter is provided.Type: GrantFiled: September 7, 2018Date of Patent: February 2, 2021Assignee: MURATA MANUFACTURING CO., LTD.Inventor: Ikuo Tamaru
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Publication number: 20190006729Abstract: A directional coupler that achieves flattening of a coupling characteristic and size reduction or miniaturization is used in a predetermined frequency band and includes a first terminal, a second terminal, a third terminal, a fourth terminal, a main line, and a sub line. The main line is connected between the first terminal and the second terminal. The sub line is connected between the third terminal and the fourth terminal. In the sub line, a low-pass filter is provided.Type: ApplicationFiled: September 7, 2018Publication date: January 3, 2019Inventor: Ikuo TAMARU
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Patent number: 9576733Abstract: An electronic component includes a capacitor having a desired capacitance value and a laminate including a plurality of laminated insulating material layers. Land electrodes are provided on a bottom surface of the laminate. Internal conductors face the land electrodes, respectively, across the insulating material layer within the laminate, have areas larger than those of the land electrodes, respectively, and contain the land electrodes, respectively, when seen in a planar view from a z-axis direction. A capacitor conductor is provided on the positive direction side of the capacitor conductors in the z-axis direction and faces the capacitor conductors.Type: GrantFiled: August 28, 2013Date of Patent: February 21, 2017Assignee: MURATA MANUFACTURING CO., LTD.Inventors: Hiroyuki Sasaki, Ikuo Tamaru
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Patent number: 9077061Abstract: A directional coupler used in a predetermined frequency band includes a main line connected between a first terminal and a second terminal. A first sub line is connected to a third terminal and is electromagnetically coupled to the main line. A second sub line is connected to a fourth terminal and is electromagnetically coupled to the main line. A low pass filter is connected between the first sub line and the second sub line and causes a phase shift to be generated in a passing signal passing therethrough in such a manner that the phase shift monotonically increases within a range from about 0 to about 180 degrees with increasing frequency in the predetermined frequency band.Type: GrantFiled: June 11, 2012Date of Patent: July 7, 2015Assignee: Murata Manufacturing Co., Ltd.Inventor: Ikuo Tamaru
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Patent number: 9035718Abstract: A directional coupler includes in a laminate block, a first main line, a first sub-line, a second sub-line, and a second main line sequentially provided in a lamination direction of layers. Further, each of the first main line, the first sub-line, the second sub-line, and the second main line is divided into at least two divided coil conductors. Furthermore, at least two divided ground conductors are provided between the first sub-line and the second sub-line.Type: GrantFiled: May 9, 2013Date of Patent: May 19, 2015Assignee: Murata Manufacturing Co. Ltd.Inventor: Ikuo Tamaru
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Patent number: 8841978Abstract: An electronic component includes a capacitor having a desired capacitance value and a laminate including a plurality of laminated insulating material layers. Land electrodes are provided on a bottom surface of the laminate. Internal conductors face the land electrodes, respectively, across the insulating material layer within the laminate, have areas larger than those of the land electrodes, respectively, and contain the land electrodes, respectively, when seen in a planar view from a z-axis direction. A capacitor conductor is provided on the positive direction side of the capacitor conductors in the z-axis direction and faces the capacitor conductors.Type: GrantFiled: December 10, 2013Date of Patent: September 23, 2014Assignee: Murata Manufacturing Co., Ltd.Inventors: Hiroyuki Sasaki, Ikuo Tamaru
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Patent number: 8760242Abstract: A multilayer bandpass filter includes a first capacitor electrode of a first stage LC parallel resonator, a second capacitor electrode of a second stage LC parallel resonator, and a third capacitor electrode of a third stage LC parallel resonator. Via electrodes and a line electrode define an inductor electrode of the first stage LC parallel resonator. Via electrodes and a line electrode define an inductor electrode of the second stage LC parallel resonator. Via electrodes and a line electrode define an inductor electrode of the third stage LC parallel resonator. The inductor electrodes of the three LC parallel resonators are arranged so loop planes thereof are disposed about a center axis extending in a stacking direction of dielectric layers. This permits setting of electromagnetic coupling between the LC parallel resonators of an input and an output stage, and allows a filter's attenuation characteristics to be freely set.Type: GrantFiled: April 26, 2013Date of Patent: June 24, 2014Assignee: Murata Manufacturing Co., Ltd.Inventors: Ikuo Tamaru, Hiroshi Masuda, Hirokazu Yazaki
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Publication number: 20140098456Abstract: An electronic component includes a capacitor having a desired capacitance value and a laminate including a plurality of laminated insulating material layers. Land electrodes are provided on a bottom surface of the laminate. Internal conductors face the land electrodes, respectively, across the insulating material layer within the laminate, have areas larger than those of the land electrodes, respectively, and contain the land electrodes, respectively, when seen in a planar view from a z-axis direction. A capacitor conductor is provided on the positive direction side of the capacitor conductors in the z-axis direction and faces the capacitor conductors.Type: ApplicationFiled: December 10, 2013Publication date: April 10, 2014Applicant: MURATA MANUFACTURING CO., LTD.Inventors: Hiroyuki SASAKI, Ikuo TAMARU
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Patent number: 8629736Abstract: In a directional coupler, a first low pass filter includes a first coil that is connected between a first outer electrode and a main line and has a characteristic in which attenuation increases with increasing frequency in a certain frequency band. A second low pass filter includes a second coil that is connected between a second outer electrode and the main line and has a characteristic in which attenuation increases with increasing frequency in the certain frequency band. A high pass filter is connected, in parallel to the main line, between a point between the first coil and the first outer electrode and a point between the second coil and the second outer electrode and has a characteristic in which attenuation decreases with increasing frequency in the certain frequency band.Type: GrantFiled: July 22, 2013Date of Patent: January 14, 2014Assignee: Murata Manufacturing Co., Ltd.Inventor: Ikuo Tamaru
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Publication number: 20130342283Abstract: An electronic component includes a capacitor having a desired capacitance value and a laminate including a plurality of laminated insulating material layers. Land electrodes are provided on a bottom surface of the laminate. Internal conductors face the land electrodes, respectively, across the insulating material layer within the laminate, have areas larger than those of the land electrodes, respectively, and contain the land electrodes, respectively, when seen in a planar view from a z-axis direction. A capacitor conductor is provided on the positive direction side of the capacitor conductors in the z-axis direction and faces the capacitor conductors.Type: ApplicationFiled: August 28, 2013Publication date: December 26, 2013Applicant: MURATA MANUFACTURING CO., LTD.Inventors: Hiroyuki SASAKI, Ikuo TAMARU
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Publication number: 20130300518Abstract: In a directional coupler, a first low pass filter includes a first coil that is connected between a first outer electrode and a main line and has a characteristic in which attenuation increases with increasing frequency in a certain frequency band. A second low pass filter includes a second coil that is connected between a second outer electrode and the main line and has a characteristic in which attenuation increases with increasing frequency in the certain frequency band. A high pass filter is connected, in parallel to the main line, between a point between the first coil and the first outer electrode and a point between the second coil and the second outer electrode and has a characteristic in which attenuation decreases with increasing frequency in the certain frequency band.Type: ApplicationFiled: July 22, 2013Publication date: November 14, 2013Inventor: Ikuo TAMARU
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Patent number: 8547189Abstract: An electronic component includes a capacitor having a desired capacitance value and a laminate including a plurality of laminated insulating material layers. Land electrodes are provided on a bottom surface of the laminate. Internal conductors face the land electrodes, respectively, across the insulating material layer within the laminate, have areas larger than those of the land electrodes, respectively, and contain the land electrodes, respectively, when seen in a planar view from a z-axis direction. A capacitor conductor is provided on the positive direction side of the capacitor conductors in the z-axis direction and faces the capacitor conductors.Type: GrantFiled: August 23, 2012Date of Patent: October 1, 2013Assignee: Murata Manufacturing Co., Ltd.Inventors: Hiroyuki Sasaki, Ikuo Tamaru
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Publication number: 20130241667Abstract: A directional coupler includes in a laminate block, a first main line, a first sub-line, a second sub-line, and a second main line sequentially provided in a lamination direction of layers. Further, each of the first main line, the first sub-line, the second sub-line, and the second main line is divided into at least two divided coil conductors. Furthermore, at least two divided ground conductors are provided between the first sub-line and the second sub-line.Type: ApplicationFiled: May 9, 2013Publication date: September 19, 2013Applicant: Murata Manufacturing Co., Ltd.Inventor: Ikuo TAMARU
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Publication number: 20130241672Abstract: A multilayer bandpass filter includes a first capacitor electrode of a first stage LC parallel resonator, a second capacitor electrode of a second stage LC parallel resonator, and a third capacitor electrode of a third stage LC parallel resonator. Via electrodes and a line electrode define an inductor electrode of the first stage LC parallel resonator. Via electrodes and a line electrode define an inductor electrode of the second stage LC parallel resonator. Via electrodes and a line electrode define an inductor electrode of the third stage LC parallel resonator. The inductor electrodes of the three LC parallel resonators are arranged so loop planes thereof are disposed about a center axis extending in a stacking direction of dielectric layers. This permits setting of electromagnetic coupling between the LC parallel resonators of an input and an output stage, and allows a filter's attenuation characteristics to be freely set.Type: ApplicationFiled: April 26, 2013Publication date: September 19, 2013Applicant: Murata Manufacturing Co., Ltd.Inventors: Ikuo TAMARU, Hiroshi MASUDA, Hirokazu YAZAKI
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Patent number: 8536956Abstract: In a directional coupler, sub-lines or main lines are electromagnetically coupled to each other to degrade isolation characteristics. A capacitor is located between the sub-lines or between the main lines to cause the isolation characteristics to have poles in order to improve the isolation characteristics of the directional coupler.Type: GrantFiled: January 31, 2013Date of Patent: September 17, 2013Assignee: Murata Manufacturing Co., Ltd.Inventors: Ikuo Tamaru, Hirokazu Yazaki, Hiroshi Masuda
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Publication number: 20120319800Abstract: An electronic component includes a capacitor having a desired capacitance value and a laminate including a plurality of laminated insulating material layers. Land electrodes are provided on a bottom surface of the laminate. Internal conductors face the land electrodes, respectively, across the insulating material layer within the laminate, have areas larger than those of the land electrodes, respectively, and contain the land electrodes, respectively, when seen in a planar view from a z-axis direction. A capacitor conductor is provided on the positive direction side of the capacitor conductors in the z-axis direction and faces the capacitor conductors.Type: ApplicationFiled: August 23, 2012Publication date: December 20, 2012Applicant: Murata Manufacturing Co., Ltd.Inventors: Hiroyuki SASAKI, Ikuo TAMARU
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Publication number: 20120319797Abstract: A directional coupler used in a predetermined frequency band includes a main line connected between a first terminal and a second terminal. A first sub line is connected to a third terminal and is electromagnetically coupled to the main line. A second sub line is connected to a fourth terminal and is electromagnetically coupled to the main line. A low pass filter is connected between the first sub line and the second sub line and causes a phase shift to be generated in a passing signal passing therethrough in such a manner that the phase shift monotonically increases within a range from about 0 to about 180 degrees with increasing frequency in the predetermined frequency band.Type: ApplicationFiled: June 11, 2012Publication date: December 20, 2012Applicant: MURATA MANUFACTURING CO., LTD.Inventor: Ikuo TAMARU
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Patent number: 8314663Abstract: A directional coupler that has a degree of coupling that is close to constant and is to be used in a predetermined frequency band includes a main line between a first outer electrode and a second outer electrode. A sub-line is provided between a third outer electrode and a fourth outer electrode and is electromagnetically coupled with the main line. A low pass filter is provided between the third outer electrode and the sub-line and has a characteristic in which attenuation increases with increasing frequency in a predetermined frequency band.Type: GrantFiled: March 5, 2012Date of Patent: November 20, 2012Assignee: Murata Manufacturing Co., Ltd.Inventors: Ikuo Tamaru, Kiyoshi Aikawa