US 12,313,569 B2
Analog signal isolator
Jonathan S. Dandy, Portland, OR (US); and Daniel G. Knierim, Beaverton, OR (US)
Assigned to Tektronix, Inc., Beaverton, OR (US)
Filed by Tektronix, Inc., Beaverton, OR (US)
Filed on Aug. 29, 2023, as Appl. No. 18/457,630.
Application 17/307,989 is a division of application No. 15/693,371, filed on Aug. 31, 2017, granted, now 10,996,178, issued on May 4, 2021.
Application 18/457,630 is a continuation of application No. 17/307,989, filed on May 4, 2021, granted, now 11,768,161.
Claims priority of provisional application 62/524,295, filed on Jun. 23, 2017.
Prior Publication US 2023/0408424 A1, Dec. 21, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. G01N 22/00 (2006.01); G01R 15/26 (2006.01); H03L 7/06 (2006.01)
CPC G01N 22/00 (2013.01) [G01R 15/26 (2013.01); H03L 7/06 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An apparatus comprising:
an input to receive a floating analog signal;
an upconverter, coupled to the input, the upconverter to modulate the floating analog signal to a microwave frequency analog signal;
an isolation barrier to prevent coupling of the floating analog signal to an earth ground; and
a microwave structure to transmit the microwave frequency analog signal across the isolation barrier via electromagnetic coupling,
wherein the microwave structure includes an input conductor on an input side of the isolation barrier and an output conductor on an output side of the isolation barrier, the input side opposite the output side, the input conductor and the output conductor electromagnetically coupled across the isolation barrier, and
wherein the microwave structure is tuned to allow the microwave frequency analog signal from the upconverter to traverse the isolation barrier from the input conductor to the output conductor substantially unchanged while preventing sub-microwave signals from traversing the isolation barrier.