Patent ID: 7340226

Claim:
A Cartesian loop transmitter comprising a forward path and a feedback path, each of these paths comprising an I-channel and a Q-channel, as well as an isolator eliminator and wherein said transmitter comprises: a) a first low pass filter and a first band pass filter connected to the I-channel at a first upconverter; b) a second low pass filter and a second band pass filter connected to the Q-channel at a second upconverter; c) a first root mean square detector collecting signal from said first low pass filter and from said second low pass filter; d) a second root mean square detector collecting signal from said first band pass filter and from said second band pass filter; e) a divider connected to said first and said second root mean square detectors; f) a comparator connected to said divider; and to g) a microprocessor connected to input attenuators on said I- and Q-channels.