US 11,811,124 B2
Controllable radio frequency switching and/or splitting device
Dirk Wiegner, Schwaikheim (DE); Wolfgang Tempi, Sersheim (DE); Senad Bulja, Dublin (IE); and Rose Kopf, Green Brook, NJ (US)
Assigned to Nokia Technologies Oy, Espoo (FI)
Filed by Nokia Technologies Oy, Espoo (FI)
Filed on Oct. 21, 2021, as Appl. No. 17/507,045.
Claims priority of application No. 20206043 (FI), filed on Oct. 22, 2020.
Prior Publication US 2022/0131251 A1, Apr. 28, 2022
Int. Cl. H01P 3/12 (2006.01); H01P 3/16 (2006.01); H01P 5/12 (2006.01)
CPC H01P 3/12 (2013.01) [H01P 3/16 (2013.01); H01P 5/12 (2013.01)] 13 Claims
OG exemplary drawing
 
1. An apparatus that is a voltage-controlled splitting and/or switching apparatus comprising:
a waveguide for a radio frequency signal comprising at least one input and at least two outputs, wherein the waveguide is a cavity waveguide or a polymer microwave fiber waveguide, and the waveguide comprises at least a first branch and a second branch;
at least one element comprising voltage reactive material in between electrodes and extending, at least partly, across at least one of the first branch and the second branch; and
a voltage control caused to apply voltage to the at least one element wherein the at least one element comprises a plurality of layers of voltage reactive material, and wherein at least one layer of the plurality of layers comprises electrochromic material and at least one layer of the plurality of layers comprises liquid crystal or transition metal oxide.