Common mode filter for enhancing mode conversion in broadband communication

A common mode filter for receiving a pair of differential signals comprising:

• a magnetic core;
• a first wire wound around the magnetic core and comprising N turns, N being an integer exceeding 1;
• and
• a second wire wound around the magnetic core and comprising N turns;
• wherein:
• an (S+1)th turn of the first wire is stacked on an Sth turn of the first wire and an Sth turn of the second wire, S being a positive integer less than (N−1), wherein the Sth turn of the first wire and the Sth turn of the second wire are wound in a first layer around the magnetic core, and the (S+1)th turn of the first wire is wound in a second layer around the first layer;
• and
• a (T+1)th turn of the second wire is stacked on a Tth turn of the first wire and a Tth turn of the second wire, T being a positive integer less than (N−1) and different from S, wherein the Tth turn of the first wire and the Tth turn of the second wire are wound in the first layer, and the (T+1)th turn of the second wire is wound in the second layer.