Tuning circuit

A NX1 combiner circuit comprising:

• N input traces on a circuit board wherein the N traces are divided into N/2 pairs and each pair is coupled to a distinct inductor coupling;
• a first tuning coil having a first leg and a second leg coupled together by a loop wherein the first and second legs are coupled to the circuit board alongside a first trace of a pair and wherein the loop of the first tuning coil extends partially over the inductor coupling associated with that pair;
• and
• a second tuning coil having a first leg and a second leg coupled together by a loop wherein the first and second legs are coupled to the circuit board alongside a second trace of the pair and wherein the loop of the second tuning coil extends partially over the inductor coupling associated with that pair.

A NX1 splitter circuit comprising:

• N output traces on a circuit board wherein the N traces are divided into N/2 pairs and each pair is coupled to a distinct inductor coupling;
• a first tuning coil having a first leg and a second leg coupled together by a loop wherein the first and second legs are coupled to the circuit board alongside a first trace of a pair and wherein the loop of the first tuning coil extends partially over the inductor coupling associated with that pair;
• and
• a second tuning coil having a first leg and a second leg coupled together by a loop wherein the first and second legs are coupled to the circuit board alongside a second trace of the pair and wherein the loop of the second tuning coil extends partially over the inductor coupling associated with that pair.

A method of tuning a circuit having a first trace having a first end and a second end, a second trace having a first end and a second end, an inductor coupling the first trace and the second trace at their perspective first ends, a first tuning coil having a first leg and a second leg coupled together by a loop wherein the first leg and second leg are coupled to the circuit board alongside the first trace, and a second tuning coil having a first leg and a second leg coupled together by a loop wherein the first and second leg are coupled to the circuit board alongside the second trace, the method comprising the steps of:

• bending the loop of the first tuning coil so that the loop of the first tuning coil extends partially over the inductor;
• bending the loop of the second tuning coil over the loop of the first tuning coil so that the loop of the second tuning coil extends partially over the inductor and the loop of the first tuning coil;
• and
• adjusting the distance between the loop of the first coil and the loop of the second coil until a desired amount of isolation is achieved between the first trace and the second trace.

An apparatus for providing tuning on a circuit board, the apparatus comprising:

• a first tuning coil having a first leg and a second leg coupled together by a loop wherein the first and second legs are coupled to a circuit board alongside a first trace;
• and
• a second tuning coil having a first leg and a second leg coupled together by a loop wherein the first and second legs are coupled to the circuit board alongside a second trace,
• wherein the loop of the first tuning coil extends partially over an inductor coupling that couples the first and second trace together at one end and wherein the loop of the second tuning coil extends partially over the inductor coupling.

A circuit for providing tuning on a circuit board, the circuit comprising:

• a first trace having a first end and a second end;
• a second trace having a first end and a second end;
• an inductor coupling the first trace and the second trace at their respective first ends;
• a first tuning coil having a first leg and a second leg coupled together by a loop wherein the first and second legs are coupled to the circuit board and wherein the loop of the first tuning coil extends partially over the inductor;
• and
• a second tuning coil having a first leg and a second leg coupled together by a loop wherein the first and second legs are coupled to the circuit board and wherein the loop of the second tuning coil extends partially over the inductor.