I/Q demodulator device with three power detectors and two A/D converters

Method of demodulating a modulated RE signal, characterized by the following steps:

• generating three output signals for power detectors by combining a first RF signal (61) to be demodulated with a second RF signal (62) originating from a local oscillator (20), and
• processing (70) to three power signals (P1, P2, P3) of the power detectors to two signal branches (X1, X2) in an analog manner, and
• processing digitally the two signal branches (X1, X2) to detect the I/Q values of the first RE signal (61) characterized in that one of the three power signals is split (7) in two subbranches.

An I/Q demodulator comprising a first input for a first RF signal to be demodulated, a second input for a second RF signal supplied from a local oscillator, power detectors for the first and second RF signals to generate three power output signals, an analog combination unit for combining said three power output signals generated by said power detectors to provide two signal branches for further digital processing to obtain I/Q values, said analog combination unit including a splitting unit for splitting one of said power output signals into two subbranches for further digital processing with the remaining power output signals.