US 12,143,066 B2
Magnetic absorbers for passive intermodulation mitigation
Charles L. Bruzzone, Woodbury, MN (US); Jeffrey A. Tostenrude, Leander, TX (US); Ethan R. Rosenberg, St. Paul, MN (US); and Jay R. Lomeda, St. Paul, MN (US)
Assigned to 3M INNOVATIVE PROPERTIES COMPANY, St. Paul, MN (US)
Filed by 3M INNOVATIVE PROPERTIES COMPANY, St. Paul, MN (US)
Filed on Apr. 25, 2023, as Appl. No. 18/139,015.
Application 18/139,015 is a division of application No. 17/449,827, filed on Oct. 4, 2021, granted, now 11,699,976.
Application 17/449,827 is a continuation of application No. 15/733,130, granted, now 11,165,391, issued on Nov. 2, 2021, previously published as PCT/IB2020/053939, filed on Apr. 27, 2020.
Claims priority of provisional application 62/908,004, filed on Sep. 30, 2019.
Prior Publication US 2023/0261612 A1, Aug. 17, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H01P 1/04 (2006.01); H01P 1/23 (2006.01); H01Q 1/00 (2006.01); H01Q 1/24 (2006.01); H03C 7/02 (2006.01); H04B 3/52 (2006.01)
CPC H03C 7/022 (2013.01) [H01P 1/23 (2013.01); H01Q 1/002 (2013.01); H01Q 1/246 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A wireless communication system comprising:
an electrically conductive passive medium capable of simultaneously propagating therealong electromagnetic first and second currents at different respective frequencies F1 and F2, the electrically conductive passive medium comprising one or more electrically conductive passive linear medium portions adjacent one or more electrically conductive passive nonlinear medium portions, the one or more passive nonlinear medium portions capable of generating an intermodulation current based on a nonlinear interaction between the first and second currents, the intermodulation current having a frequency Fi equal to nF1+mF2 and propagating along the one or more passive nonlinear medium portions, m and n being positive or negative integers; and
one or more first materials disposed proximate one or more electrically conductive external surfaces of the one or more linear medium portions, such that when the first and second currents propagate along the one or more passive linear medium portions toward the one or more passive nonlinear medium portions, the one or more first materials reduce or prevent the generation of the intermodulation current in the one or more passive nonlinear medium portions by attenuating at least portions of the first and second currents.