| 摘要 |
<p>The present invention relates to a diplex filter for testing a base station. A diplex filter comprises, in the interior of a single housing, a band pass filter unit, a band reject filter unit and a coupling block. The housing is provided with first and second connectors connected to a transceiver of a base station, and a third connector connected to an antenna. The band pass filer and the band reject filter each comprises, in the interior of the housing, a plurality of cavities and a plurality of resonators, each of which is installed in a cavity. The coupling block is coupled, in an open type or a short type, with the resonator of the cavity in the final position on the signal transmission path of a band pass filter unit, and is electrically connected to the third connector. The coupling block blocks passage of unnecessary signals from desired particular low- and high-frequency bands.</p> |
