| 摘要 |
<p>The filter has a number of circular resonant cavities (30,35) with coupling between them. An input waveguide leads to an input slot to the first cavity, and the cavities are connected sequentially, with input and output coupling slots at right angles between them. Two sets of cavities have waveguide slots (47,48) which provide feedback by coupling the power from a down line cavity and feeding it back into a coupling slot in a previous cavity. Coupling is provided via a magnetic field.</p> |
