Power adjusting circuit and method

The invention provides a power regulation circuit and method, which are applied to the technical field of communication, and the circuit comprises a first coupler, a second coupler, a first power detection module, a second power detection module and a power regulation module, the first coupler is connected with a first PA of a first link in the MIMO system, an output end of the first link, a first power detection module and the ground; the first power detection module is connected with the power adjustment module, the first PA is connected with the power adjustment module, the first PA is connected with the power adjustment module, and the power adjustment module is connected with the first link. In the power detection circuit provided by the embodiment of the invention, the output power of the radio frequency signal on each link in the MIMO system is detected in real time through the power detection module, and under the condition that the output power of the radio frequency signal is smaller than the satura