H - Electricity – 01 – Q
Patent
H - Electricity
01
Q
333/15
H01Q 23/00 (2006.01) H01F 19/04 (2006.01) H01Q 1/00 (2006.01) H03H 7/46 (2006.01) H04B 1/18 (2006.01)
Patent
CA 1137179
RCA 72,540 ANTENNA ISOLATION DEVICE Abstract of the Disclosure An isolation device coupled between an antenna network and a fixed tuned VHF/UHF signal splitter includes a first bifilar transmission line and a second bifilar transmission line wound with multiple turns about separate toroidal portions of a magnetic core. Each of the bifilar transmission lines has first and second conductors. At an input port of the device, the first conductor of the first transmission line and the second conductor of the second transmission line are coupled to respective antenna terminals of the antenna network and the second conductor of the first transmission line and the first conductor of the second transmission line are coupled together. At an output port of the device, the second conductor of the first transmission line and the first conductor of the second transmission line are coupled to respective input terminals of the signal splitter and the first conductor of the first transmission line and the second conductor of the second transmission line are coupled together. The number of turns of each of the transmission lines about its respective toroidal portion is selected to provide sufficient amplitude response in the UHF range. The permeability of the core is selected to provide sufficient amplitude response in the VHF range. -1-
320835
Morneau Roland L.
Rca Corporation
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