| 摘要 |
PURPOSE:To attain miniaturization with easy assembly and maintenance for an antenna sharing system even with many channels, by using rectangular waveguide type cavity resonators containing input/output coupling elements and resonance frequency fine control elements on the same side wall. CONSTITUTION:Each of rectangular waveguide type resonators 221-2214 contains a pair of an input/output coupling element and a resonance frequency fine control element on the front side wall rectangular to the axial direction of the resonance length. These resonators are put on each other vertically to a store rack 21. While the input/output coupling element at one side of each of the resonators of odd numbers is connected to a coupling line 25 via a coupling point set every lambdagc/2 space. Then the input/output coupling element at the other side of resonators of even numbers is connected to a coupling line 26 via a said coupling point. In such a way, the gap length is reduced between upper and lower cavity resonators for miniaturization. In addition, the assembling and maintenance works can be facilitated. The mutual interference is also avoided among channels. |
