Patents by Inventor Longfei YI
Longfei YI 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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Patent number: 11955681Abstract: A band-pass filter includes a first input/output port, a second input/output port, a plurality of resonators, and a multilayer stack. The multilayer stack includes a plurality of stacked dielectric layers. Each of the resonators is an open-ended resonator formed of a conductor line in the multilayer stack. Each of the resonators includes a resonator conductor portion including a first line part and a second line part located away from each other in a direction orthogonal to a stacking direction of the plurality of dielectric layers, and a third line part connecting the first line part and the second line part. The first to third line parts extend to surround a space between the first line part and the second line part.Type: GrantFiled: December 20, 2021Date of Patent: April 9, 2024Assignee: TDK CORPORATIONInventors: Honoka Atsuchi, Yuta Ashida, Longfei Yi, Yoshinori Matsumaru, Shuhei Sawaguchi, Masahiro Tatematsu, Shigemitsu Tomaki
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Publication number: 20240022225Abstract: An electronic component includes: a first conductor extending in one direction; a second conductor extending in the one direction; a first inductor conductor bridged so as to linearly extend between an end portion of the first conductor in its extending direction and an end portion of the second conductor in its extending direction; a connecting conductor that extends in the one direction and has a first end portion and a second end portion in its extending direction, the first end portion being connected to the first inductor conductor and being located between the first conductor and the second conductor; and a capacitor pad electrically connected to the second end portion of the connecting conductor.Type: ApplicationFiled: April 19, 2023Publication date: January 18, 2024Applicant: TDK CORPORATIONInventors: Longfei YI, Shigemitsu TOMAKI
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Publication number: 20230253945Abstract: A filter circuit includes a pair of balanced input ports, a pair of balanced output ports, first and second resonators provided in parallel between the pair of balanced input ports and the pair of balanced output ports in a circuit configuration, a first capacitor connected in parallel to the first resonator, and a second capacitor connected in parallel to the second resonator. The first and second resonators are magnetically coupled to each other and electrically connected to each other. The first and second capacitors are not electrically connected to ground.Type: ApplicationFiled: January 31, 2023Publication date: August 10, 2023Applicant: TDK CORPORATIONInventors: Masahiro TATEMATSU, Shuhei SAWAGUCHI, Yuta ASHIDA, Tetsuzo GOTO, Yoshinori MATSUMARU, Shigemitsu TOMAKI, Longfei YI
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Publication number: 20230246621Abstract: A filter circuit includes a pair of balanced input ports, a pair of balanced output ports, and first and second resonators provided in parallel between the pair of balanced input ports and the pair of balanced output ports in a circuit configuration, the first and second resonators being magnetically coupled to each other. Between the first resonator and the second resonator, a capacitor is present but no inductor is present in the circuit configuration.Type: ApplicationFiled: January 30, 2023Publication date: August 3, 2023Applicant: TDK CORPORATIONInventors: Shuhei SAWAGUCHI, Masahiro TATEMATSU, Yuta ASHIDA, Tetsuzo GOTO, Yoshinori MATSUMARU, Shigemitsu TOMAKI, Longfei YI
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Publication number: 20230143899Abstract: A filter includes first and second resonators and first and second stub resonators. Each of the first and second resonators includes a first conductor part and a second conductor part electrically connected to the first conductor part and having an impedance smaller than an impedance of the first conductor part. The first stub resonator is electrically connected to the first conductor part of the first resonator. The second stub resonator is electrically connected to the first conductor part of the second resonator. The shape of the first stub resonator and the shape of the second stub resonator are different from each other.Type: ApplicationFiled: November 3, 2022Publication date: May 11, 2023Applicant: TDK CORPORATIONInventors: Longfei YI, Shigemitsu TOMAKI
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Publication number: 20230130049Abstract: A filter device includes first to third resonators. Each of the first to third resonators includes a first line part and a second line part electrically connected to the first line part and having an impedance smaller than an impedance of the first line part. The impedance ratio in at least one of the first to third resonators is 0.3 or smaller. The shape of each of the second line part of the first resonator and the second line part of the second resonator is long in a direction orthogonal to a stacking direction and crossing the longitudinal direction of the second line part of the third resonator.Type: ApplicationFiled: October 18, 2022Publication date: April 27, 2023Applicant: TDK CORPORATIONInventors: Longfei YI, Shigemitsu TOMAKI
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Publication number: 20230127771Abstract: A filter device includes a stack including a plurality of dielectric layers stacked together, and first to third resonators integrated with the stack. Each of the first to third resonators includes a first conductor part and a second conductor part electrically connected to the first conductor part and having an impedance smaller than an impedance of the first conductor part. The first conductor part and the second conductor part are arranged at positions different from each other in a stacking direction.Type: ApplicationFiled: October 18, 2022Publication date: April 27, 2023Applicant: TDK CORPORATIONInventors: Longfei YI, Shigemitsu TOMAKI
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Publication number: 20220209380Abstract: A band-pass filter includes a first input/output port, a second input/output port, a plurality of resonators, and a multilayer stack. The multilayer stack includes a plurality of stacked dielectric layers. Each of the resonators is an open-ended resonator formed of a conductor line in the multilayer stack. Each of the resonators includes a resonator conductor portion including a first line part and a second line part located away from each other in a direction orthogonal to a stacking direction of the plurality of dielectric layers, and a third line part connecting the first line part and the second line part. The first to third line parts extend to surround a space between the first line part and the second line part.Type: ApplicationFiled: December 20, 2021Publication date: June 30, 2022Applicant: TDK CORPORATIONInventors: Honoka ATSUCHI, Yuta ASHIDA, Longfei YI, Yoshinori MATSUMARU, Shuhei SAWAGUCHI, Masahiro TATEMATSU, Shigemitsu TOMAKI