Balun phase and amplitude imbalance correction

An apparatus comprising:

• a first metal layer including a first segment and a second segment, in which the first segment is coupled to a first signal terminal, the second segment has a disconnected end;
• a second metal layer including a third segment and a fourth segment, in which the third segment extends along the first segment, the fourth segment extends along the second segment, a first end of the third segment and a first end of the fourth segment are electrically coupled at a center tap, and a second end of the third segment and a second end of the fourth segment are coupled to a second signal terminal and a third signal terminal;
• a via at the center tap and coupled to a first reference terminal;
• and
• a device extending along at least one of:
• a first subsegment of the third segment overlapping at least partially with the first signal terminal or a second subsegment of the fourth segment overlapping at least partially with the disconnected end of the second segment, the device coupled to a second reference terminal.