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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 6714099 B1

PDFFull Text
Expired
Date of Patent:
Mar. 30, 2004

Filed:

Mar. 26, 2002

Radio frequency filter, radio frequency circuit, antenna duplexer and radio terminal

Applicant:
Inventors:

Mitsutaka Hikita, Kokubunji, JP;

Nobuhiko Shibagaki, Kokubunji, JP;

Naoki Matsuura, Mizusawa, JP;

Kazuyuki Yokoyama, Mizusawa, JP;

Shigeki Matsuda, Mizusawa, JP;

Assignee:

Hitachi Media Electronics Co., Ltd., Mizusawa, JP;

Attorney:

Crowell & Moring LLP

Primary Examiner:

Barbara Summons

Int. Cl.
CPC ...
H03H 9/54 ; H03H 9/64 ; H03H 9/70 ; H03H 9/72 ;
U.S. Cl.
CPC ...
H03H 9/54 ; H03H 9/64 ; H03H 9/70 ; H03H 9/72 ;
Abstract

A radio frequency filter that can be miniaturized is provided. The radio frequency filter has a ladder-type resonator filter, a first terminal, a second terminal, a serial capacitance, a parallel capacitance, a serial inductance, and a parallel inductance. In the ladder-type resonator filter, a plurality of first surface acoustic wave resonators or first film bulk acoustic resonators are connected in a ladder circuit configuration. The serial inductance and the parallel capacitance are connected between the ladder-type resonator filter and the first terminal. The serial capacitance and the parallel inductance are connected between the ladder-type resonator filter and the second terminal.

Find Patent Forward Citations

Hikita, Mitsutaka. (2004). Radio frequency filter, radio frequency circuit, antenna duplexer and radio terminal (U.S. Patent No. 6714099). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/6714099

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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