Multiplexer and detector

A detector, comprising an antenna, an orthogonal mode coupler, a plurality of dynamic inductor thermal radiators, and a multiplexer;

• wherein the multiplexer comprises:
• a dielectric base plate, wherein a conductive thin film layer is disposed on a side plane of the dielectric base plate, the conductive thin film layer comprises a signal wire and one or more grounding plates on a side of the signal wire, and there is one or more gaps between the signal wire and the one or more grounding plates;
• a connection structure, disposed on the conductive thin film layer, and comprising a main branch and a plurality of branches, wherein the main branch is connected to the plurality of branches respectively, and the main branch serves as an input port of the multiplexer;
• and
• a plurality of bandpass filters with different operation frequencies, wherein each of the plurality of bandpass filters is connected to the signal wire and the one or more grounding plates;
• wherein each bandpass filter comprises a first port and a second port, the first port is connected to a corresponding branch respectively, and the second port serves as one of output ports of the multiplexer;
• wherein the antenna is connected to the orthogonal mode coupler;
• the orthogonal mode coupler is connected to an input port;
• the plurality of dynamic inductor thermal radiators are respectively connected to a plurality of output ports;
• and
• the orthogonal mode coupler, the plurality of dynamic inductor thermal radiators, and the multiplexer share one dielectric base plate.