| 摘要 |
<p>The present invention provides a multi-mode cavity filter in which signals are coupled to or from a resonator body, using a coupling path with first and second portions arranged such that current flows in opposite directions and the couplings due to the magnetic fields generated partially cancel one another. In this way, the degree of coupling to any particular mode of the filter can be closely controlled by varying the length and/or orientation of the portions with respect to each other.</p> |
