Signal transmitter device and calibration method

A signal transmitter device, comprising:

• a first transmitter, comprising:
• a first oscillator circuitry configured to output a first oscillating signal;
• a signal processing circuitry configured to mix a plurality of calibration signals according to the first oscillating signal to transmit a first output signal;
• and
• a calibration circuitry configured to detect a power of the first output signal to generate a plurality of coefficients, and configured to generate the plurality of calibration signals according to the plurality of coefficients, an in-phase data signal and an quadrature data signal;
• and
• a second oscillator circuitry disposed adjacent to the first transmitter and configured to output a second oscillating signal,
• wherein the plurality of calibration signals are configured to reduce a sum of a first phase error introduced by a pulling generated by the first output signal to the first oscillator circuitry and a second phase error introduced by a pulling generated by the second oscillating signal to the first oscillator circuitry;
• wherein the plurality of coefficients are calculated according to the sum of the first phase error and the second phase error.