Patent ID: 11888511
Assignee: WISTRON NEWEB CORPORATION
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A communication device for operating in an operating frequency band, the communication device comprising:
an antenna element;
a transceiver electrically connected to the antenna element, the transceiver having a transmitting end and a feedback receiving end; and
a radio frequency circuit electrically connected between the antenna element and the transceiver, the radio frequency circuit including:
a substrate;
a first conducting wire disposed on a first surface of the substrate;
a second conducting wire disposed on the first surface and arranged corresponding to the first conducting wire; and
four transmission lines disposed on the first surface, wherein two of the four transmission lines are respectively connected to two ends of the first conducting wire to form an input part and an output part, and another two of the four transmission lines are respectively connected to two ends of the second conducting wire to form a coupling part and an isolation part; wherein the input part is arranged corresponding to the coupling part, and the output part is arranged corresponding to the isolation part; wherein the input part is electrically connected to the transmitting end, the output part is electrically connected to the antenna element, the coupling part is electrically connected to the feedback receiving end, and the isolation part is connected to a ground potential;

wherein the first conducting wire and the second conducting wire are separate from each other and coupling to each other, and each of a width of the first conducting wire and a width of the second conducting wire is not equal to a width of any one of the four transmission lines.