Patent ID: 11888457
Assignee: NOKIA TECHNOLOGIES OY
Field: Telecommunications (Electrical engineering)
Classification: CPC H | IPC H

Claim 13:
14. A filter comprising:
first and second circuitry, wherein each of the first and second circuitry comprises:
a first resonant radio frequency conductive path between a first node and a third node;
a second resonant radio frequency conductive path between a second node and the third node;
an internode radio frequency conductive path between the first node and the second node;
a shunt resonant element coupled to the third node and shared by the first resonant radio frequency conductive path and the second resonant radio frequency conductive path; and
a phase shift element for introducing a relative phase shift to the first resonant radio frequency conductive path relative to the second resonant radio frequency conductive path; and
a four-port cross-coupler comprising four ports,
wherein a first one of the ports of the four-port cross-coupler is coupled to the first node of the first circuitry,
wherein a second one of the ports of the four-port cross-coupler is coupled to the first node of the second circuitry, and
wherein two other ports of the four-port cross-coupler provide input/output ports of the filter.