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:
Mar. 01, 1977
Filed:
Oct. 17, 1975
Allen Robert Wolfe, Sauquoit, NY (US);
General Electric Company, Utica, NY (US);
Abstract
A printed rf circuit switchable step attenuator for frequencies in the Gigahertz range employs PIN diodes for switching a pi network in and out of a transmission line. The A.C. grounded terminations of the pi network are constructed through the use of low impedance, open end stubs, eliminating the need for plated over-edge ground connections. D.C. bias potential for controlling the switching diodes is coupled to the rf portion of the circuit by means including high impedance grounded stub conductors connected to the transmission line. To achieve broadband operation the admittance of the stub conductors is tuned out by configuring the transmission line as a series of differing line length and impedance sections which are arranged symmetrically with respect to the point of intersection between the grounded stub conductors and the line.