| 摘要 |
<p>The present invention relates to a circulator having the broadband characteristic applied in an isolator, an injection phase amplifier, a modulator, etc., using an NRD guide. According to the first preferred embodiment of the present invention, a permanent magnet is used and a mode suppresser, which can suppress unnecessary modes, is inserted so as to accomplish the low loss characteristic. According to the second perferred embodiment of the present invnetion, the NRD line, which is the port of the circulator using an NRD guide, is implemented as the step type so as to accomplish the broadband characteristic.</p> |
