| 摘要 |
<P>PROBLEM TO BE SOLVED: To obtain a demultiplexing circuit which has excellent mass productivity and stable characteristics and which is easily mounted, and to obtain a demultiplexing device. <P>SOLUTION: A band-pass filter is inserted into a connector of a receiving filter and a transmission filter to an antenna, that is, a branching unit. The band-pass filter cannot only use a microstrip filter formed on a dielectric board but also use a waveguide filter or the like constituted integrally with a dielectric waveguide. In addition, a cylindrical waveguide filter, an NRD guide, a multilayer substrate or a slot line can be used. <P>COPYRIGHT: (C)2004,JPO |
