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.:
Date of Patent:
Aug. 12, 2014
Filed:
Aug. 26, 2010
Tomohiko Maruo, Atsugi, JP;
Hiroshi Watanabe, Atsugi, JP;
Seiichi Ishizaki, Atsugi, JP;
Anritsu Corporation, Atsugi-Shi, JP;
Abstract
[Problem] To provide a band stop filter unit, a mobile communication terminal test system, and a mobile communication terminal test method that are flexibly adaptable to the addition/change of a specification in a frequency band for mobile communication. [Means for Resolution] There are provided a first variable filter () and a second variable filter () which are connected to each other in series, respectively have YIG elements to vary tuning frequencies (fand f), and attenuate the desired signal within predetermined bandwidths (ΔBWand ΔBW) having centers of the tuning frequencies. The tuning frequency (f) and the tuning frequency (f) are controlled to be the same as each other or around each other when the desired signal is located at a low frequency band side. The tuning frequency (f) and the tuning frequency (f) are controlled to include the desired signal in a connected bandwidth and to make the connected bandwidth wider than any of the predetermined bandwidth (ΔBW) and the predetermined bandwidth (ΔBW) when the desired signal is located at a high frequency band side.