| 摘要 |
PURPOSE: A duplexer filter is provided to increase a liability and, simultaneously, diversify a filter design with an error of a coupling device value reducing. CONSTITUTION: A duplexer filter includes a transmitting end(20) and a receiving end(10) which include a large number of dielectric material resonator(DR), thereby, simultaneously, transmitting and receiving a signal. The receiving end includes a substrate, a first MCC group, and a second MCC group. A predetermined pattern is formed on the substrate so that the dielectric material resonator is installed and, electrically, connected. The first MCC group is to control an input and an output impedance and, simultaneously, to couple with the dielectric material resonator. The second MCC group is to in series connect to the dielectric material resonator and form a large number of attenuating pole for a frequency selection between a passage frequency band and a cut-off frequency band. The transmitting end includes a substrate, a micro-strip line(12e) of a predetermined pattern, a third MCC group, and a fourth MCC group. The substrate is that the dielectric material resonator is installed and, electrically, connected. The third MCC group is to in series connect to the dielectric material resonator and form a large number of attenuating pole for a frequency selection between a passage frequency band and a cut-off frequency band. The micro-strip line is to control an input and an output impedance and, simultaneously, to couple with the dielectric material resonator. The fourth MCC group is connected to the micro-strip line in parallel and passes a constant frequency band.
|
