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:
Jan. 06, 1987
Filed:
Apr. 22, 1985
Edward G Magill, Brooklyn, NY (US);
Eaton Corporation, Cleveland, OH (US);
Abstract
A surface acoustic wave (SAW) meander type delay line (FIG. 8) is provided by a plurality of multistrip reflecting track changers (82, 84, 86, 88, 89) on a piezoelectric substrate (80) for folding back a SAW propagation path (106, 108) in serpentine manner. The meander delay line is tapped by simple RF tap means comprising single lossless coupling strips (110, 112) in the track changers removing only that portion of the SAW signal actually tapped out and converted to RF, and directly coupling out such signal portion over the entire bandwidth of the track changer. The single strips are on the center line between the arms of respective U-shaped multistrip couplers (102, 104) of the track changers. The structure enables high impedance direct RF multitap bus connection facilitating RF bus summation of many taps without a plural switching network.