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.
Claims23
A balanced-to-unbalanced (balun) transformer comprising:
- a primary inductor coupled to an unbalanced terminal;
- and
- a secondary inductor coupled to a balanced terminal;
- wherein:
- the primary inductor is configured on a second layer and a third layer of a four-layer symmetrical stack-up, and the secondary inductor is configured on a first layer and a fourth layer of the four-layer symmetrical stack-up.
An integrated circuit with a multi-layer symmetrical package substrate, the circuit comprising:
- a first inductor coupled to an unbalanced terminal via a capacitor;
- and
- a second inductor coupled to a balanced terminal via a set of series capacitors;
- wherein:
- the first inductor comprises a first plurality of windings disposed on a first set of layers of the multi-layer substrate, the second inductor comprises a second plurality of windings disposed on a second set of layers of the multi-layer substrate, and the first set of layers and the second set of layers are symmetrically stacked along a vertical (Z) axis.
An apparatus comprising:
- one or more antennas;
- and
- front-end circuitry communicatively coupled to the one or more antennas via a balanced-to-unbalanced (balun) transformer, the balun transformer comprising:
- a primary inductor coupled to an unbalanced terminal of the front-end circuitry;
- and
- a secondary inductor coupled to a balanced terminal of the front-end circuitry;
- wherein:
- the primary inductor is configured on a second layer and a third layer of a four-layer symmetrical stack-up, and the secondary inductor is configured on a first layer and a fourth layer of the four-layer symmetrical stack-up.
Dependencies are inferred from the claim text.