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. 26, 2003
Filed:
Feb. 21, 2002
Christian Rookes, Ipswich, GB;
Ian Mitchell, Ipswich, GB;
Agilent Technologies, Inc., Palo Alto, CA (US);
Abstract
A laser diode is matched to a laser driver IC by a microwave stub to take advantage of radio frequency/microwave effects of electrical conductors on high frequency signals. The microwave stub is a piece of microwave transmission line with a characteristic impedance defined by its physical dimensions and its material. A transmission line having a distributed set of capacitors and inductors is tuned over a range of frequencies by changing its operating length/width. A capacitor short circuits the microwave stub to ground. The capacitor position along the microwave stub determines the microwave transmission line operating length (and hence frequency). Therefore, a matching network is tuned by changing the capacitor position along the microwave stub instead of using several different valued capacitors.