Multi-layer balanced-to-unbalanced (balun) transmission line transformer with harmonic rejection
AssigneeIntel Corporation
InventorsGenadi Blay, Uzi Zohar, Jacob Solomon
Life of this patent
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Abstract
A balanced-to-unbalanced (balun) transformer includes a primary inductor coupled to an unbalanced terminal and a secondary inductor coupled to a balanced terminal. The primary inductor is configured on a second layer and a third layer of a four-layer symmetrical stack-up. The secondary inductor is configured on a first layer and a fourth layer of the four-layer symmetrical stack-up. The primary inductor includes a first primary winding disposed on the second layer and a second primary winding disposed on the third layer. The secondary inductor includes a first secondary winding disposed on the first layer and a second secondary winding disposed on the fourth layer.
Claims14
A balanced-to-unbalanced (balun) transformer comprising:
- a primary inductor coupled to an unbalanced terminal and comprising a plurality of primary windings;
- and
- a secondary inductor coupled to a balanced terminal and comprising a plurality of secondary windings;
- wherein:
- the primary inductor is configured on a second layer and a third layer of a four-layer symmetrical stack-up, the secondary inductor is configured on a first layer and a fourth layer of the four-layer symmetrical stack-up, the four-layer symmetrical stack-up comprising a plurality of connection vias, a first connection via of the plurality of connection vias coupling the first layer and the fourth layer to a ground terminal, a second connection via of the plurality of connection vias coupling the third layer to the ground terminal, the second connection via configured within a void formed by the plurality of secondary windings, and the first connection via configured externally to the void formed by the plurality of secondary windings.
Dependencies are inferred from the claim text.