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:
Oct. 31, 2006
Filed:
Apr. 05, 2002
Kenichi Hosoya, Tokyo, JP;
Kenichi Hosoya, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
An object is to suppress a reflection loss in any desired frequency band outside a required band, without affecting circuit characteristics in the required frequency band. The output impedance of a circuit in a specified frequency band is transformed into a high impedance by a transmission line. A resistance grounding circuithaving a frequency selectivity is connected in parallel. The resistance grounding circuitis constructed of a resistorwhich has a resistance close to a load resistance, a capacitance C which is selected so as to satisfy an equation Im[tan h{γ(λ/2−δ)}]=−ωCZat an angular frequency ωincluded in the frequency band, and a (λ/2−δ)-long end-open stub.