High accuracy tuning of resonant network

A tunable inductor comprising:

• a first magnetic core including a unitary base with three peaks extending in a same direction and two valleys separating each of the three peaks from an adjacent peak;
• a second magnetic core configured to contact the three peaks of the first magnetic core;
• an alternating current (AC) winding, wherein a first portion of the AC winding is wound around a first peak of the three peaks in a first direction, and a second portion of the AC winding is wound around a second peak of the three peaks in a second direction that is opposite the first direction, the first portion and the second portion electrically connected;
• and
• a direct current (DC) winding wound around a third peak, the third peak located in between the first peak and the second peak.

A tunable inductor comprising:

• a first magnetic core;
• a second magnetic core;
• an alternating current (AC) winding, wherein a first portion of the AC winding is wound around a first segment of the first magnetic core in a first direction, and a second portion of the AC winding is wound around a first segment of the second magnetic core in a second direction that is opposite the first direction, the first portion and the second portion comprising a unibody wire;
• and
• a direct current (DC) winding simultaneously wound around a second segment of the first magnetic core that does not overlap with the first segment of the first magnetic core and a second segment of the second magnetic core that does not overlap with the first segment of the second magnetic core.