Vector summing amplifier and phase shift device including the same

A phase shift device comprising:

• an active balun configured to convert a single-phase input signal into a differential input signal;
• an orthogonal signal generator configured to receive the differential input signal and output a plurality of orthogonal signals;
• a vector summing amplifier configured to output a differential output signal having a target phase and a target gain based on the plurality of orthogonal signals;
• a variable gain amplifier configured to output a single-phase output signal having a conversion gain from the differential output signal;
• and
• a communication processor configured to control the vector summing amplifier and the variable gain amplifier,
• wherein the vector summing amplifier comprises:
• a phase control circuit configured to receive the orthogonal signals and output a first signal having the target phase through a vector sum of at least a portion of the plurality of orthogonal signals;
• and
• a gain compensation circuit configured to receive the first signal and output a second signal having the target phase and a target gain,
• wherein the communication processor controls a plurality of compensation transistors, included in the gain compensation circuit, based on a first amplification factor corresponding to the target phase such that the gain compensation circuit outputs a signal having the target gain.

A method of controlling a vector summing amplifier, the method comprising:

• receiving a command including data indicating a target phase;
• generating a differential intermediate signal having the target phase from orthogonal signals using a phase control circuit in response to the command;
• and
• outputting a differential output signal having the target phase and a target gain from the differential intermediate signal using a gain compensation circuit,
• wherein the outputting of the differential output signal further comprises controlling a gain of the differential intermediate signal based on an amplification factor stored to correspond to the target phase.