Microstrip mixer and microwave-doppler detecting module

A microwave-doppler detecting module, comprising:

• a microstrip mixer, comprising at least first and second mixer tubes and a microstrip mixing line, first ends of said first and second mixer tubes being grounded, wherein said microstrip mixing line comprises a first microstrip arm and a second microstrip arm integrally extended from said first microstrip arm, wherein said microstrip mixer has a shared port, a mixing output port and a local oscillator signal input port, wherein said local oscillator signal input port is electrically connected with said shared port through said first microstrip arm and electrically connected with a second end of said first said mixer tube through said shared port, wherein said local oscillator signal input port is electrically connected with said mixing output port through said second microstrip arm and electrically connected with a second end of said second mixer tube through said mixing output port, such that when a local oscillator signal is input through said local oscillator signal input port and a feedback signal is input through said shared port, the high frequency feedback signal and local oscillator signal output from said shared port and said mixing output port to said mixer tubes are able to be conducted to the ground and the intermediate-frequency signal corresponding to the frequency difference of the local oscillator signal and the feedback signal is able to be extracted;
• an oscillation circuit module, arranged to be adapted to output a local oscillator signal when powered and electrically coupled with said local oscillator signal input port of said microstrip mixer;
• a radiation source, electrically coupled with said shared port of said microstrip mixer;
• and
• a reference ground, grounded and spacingly arranged with said radiation source.