Adjustable power splitter/combiner

A power splitter/combiner having a first port, a second port, and a third port, comprising:

• first and second transmission lines, the first transmission line having a first terminal coupled to the first port and a second terminal coupled to the second port, the second transmission line having a first terminal coupled to the first port and a second terminal coupled to the third port;
• first and second capacitors each having a first terminal and a second terminal, the first terminal of the first capacitor coupled to the second port, the first terminal of the second capacitor coupled to the third port, the second terminal of each of the first and second capacitors coupled to a common node, and at least one of the first and second capacitors having a capacitance value that is adjustable during operation;
• and
• a resistor having a first terminal coupled to the second port and a second terminal coupled to the third port.

A device, comprising a semiconductor die in which a power splitter/combiner is formed, the power splitter/combiner having a first port, a second port, and a third port and including:

• first and second transmission lines, the first transmission line having a first terminal coupled to the first port and a second terminal coupled to the second port, the second transmission line having a first terminal coupled to the first port and a second terminal coupled to the third port, at least one of the first and second transmission lines having a characteristic impedance and a phase shift that are adjustable during operation;
• first and second capacitors each having a first terminal and a second terminal, the first terminal of the first capacitor coupled to the second port, the first terminal of the second capacitor coupled to the third port, and the second terminal of each of the first and second capacitors coupled to a common node;
• and
• a resistor having a first terminal coupled to the second port and a second terminal coupled to the third port.