Method and device for measuring characteristics of RF chains

A measurement device comprising:

• a signal generator configured to generate a test signal comprising a component signal of a first frequency and a component signal of a second frequency;
• and
• a measurement controller configured to:
• input the generated test signal to a radio frequency (RF) chain comprising at least one circuit element;
• detect output signals of a first diode, a second diode, and a third diode which receive, as input signals, signals generated based on a coupled signal regarding an input test signal of a circuit element of the at least one circuit element, and based on a coupled signal regarding an output test signal of the circuit element;
• and measure an S-parameter regarding the circuit element, based on a component signal of a third frequency in the output signal of the first diode, a component signal of the third frequency in the output signal of the third diode, and the output signal of the second diode,
• wherein the coupled signal regarding the input test signal of the circuit element is divided into the input signal of the first diode and a first input signal by a first power divider,
• wherein the coupled signal regarding the output test signal of the circuit element is divided into the input signal of the third diode and a second input signal by a second power divider,
• wherein the input signal of the second diode is a combined signal that is generated by a power combiner based on the first input signal and the second input signal,
• wherein the third frequency is a difference between the first frequency and the second frequency.