Microwave power switch circuit, device and control method

The invention provides a microwave power switch circuit and device and a control method. The circuit comprises a radio frequency input port, a first matching element, a second matching element, at least one radio frequency output port and at least one switch module, the switch modules are in one-to-one correspondence with the radio frequency output ports; the switch module comprises a first switch branch; the first switch branch comprises a first switch tube, a second switch tube and an absorption load; in the same first switch branch, the first switch tube is connected in series with the absorption load, and the second switch tube is connected in parallel with the absorption load; when the microwave power switching circuit works, the switching state of the first switching tube and the switching state of the second switching tube in the same switching module are opposite, so that the radio frequency output port and the radio frequency input port corresponding to the switching module are in a conduction state