H - Electricity – 01 – P
Patent
H - Electricity
01
P
325/114, 333/9
H01P 5/18 (2006.01) H03D 9/06 (2006.01)
Patent
CA 1063190
FREQUENCY COMBINING CIRCUIT ABSTRACT OF THE DISCLOSURE A frequency combining circuit in the form of a planar transmission circuit has a four-port directional coupler, two transmission lines respectively coupled to the forward and backward coupling ports of the directional coupler, and two filters respectively coupled to the two transmission lines, one of the two filters being further coupled to a load. By applying a first frequency signal to the coupler input port and applying a second frequency signal to the other one of the filters, the first and second frequency signals are combined in an excellent manner at the coupler output port of the coupler due to the provision of the two filters, both of which reject the first frequency signal and pass therethrough the second frequency signal.
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