Variable Power Coupling Device

A frequency combiner comprising:

• a first transmission line comprising a first and a second end, the first end comprising a first terminal, the second end comprising a first branch and a second branch, the first transmission line configured to combine a first signal at a first frequency received by the first branch and the second signal at a second frequency received by the second branch into a third signal;
• and
• a second transmission line electromagnetically coupled to the first branch of the first transmission line and configured to receive a fourth signal at a third frequency to control the frequency of the third signal.

A system comprising:

• a first transmission line comprising a first and a second end, the first end comprising a first terminal, the second end comprising a first branch and a second branch, the first transmission line configured to receive a first signal at the first terminal and dividing the first signal at the first branch and the second branch;
• and
• a second transmission line inductively coupled to the first transmission line and configured to receive a second signal to control the power of the divided first signal through the inductive coupling.

A system comprising:

• a first transmission line comprising a first and a second end, the first end comprising a first terminal, the second end comprising a first branch and a second branch, the first transmission line is configured to combine a first signal received by the first branch and the second signal received by the second branch into a third signal to be output at the first terminal;
• and
• a second transmission line inductively coupled to the first branch of the first transmission line and configured to receive a fourth signal to control the power of the third signal through the inductive coupling.