| 摘要 |
<p>A resonator, a filter, an oscillator, a duplexer, and a communication apparatus employing these devices have improved efficiency characteristics in confining an electromagnetic field in an opening of an electrode, suppressed current concentration, and minimized conductor loss. Electrode patterns (2' ) are formed near short-circuited positions in a slot (3) so that the slot (3) will be divided into smaller-width slot lines. Consequently, the efficiency in confining the electromagnetic field is improved, and conductor loss is minimized. In another embodiment, an opening (6) is defined within an electrode, and a plurality of electrode patterns (2') extend radially inwards from a periphery of the opening.</p> |
