| 摘要 |
Two TE modes whose electric-field rotating planes have a perpendicular relationship are coupled independently of the coupling between two TM modes whose electric-field directions have the same respective perpendicular relationships. In a multimode dielectric resonator device producing four modes: TM 01delta _x mode, TM 01delta _y mode, TE 01delta _x mode, and TE 01delta _y mode, protrusions (Pe 1 ), (Pe 2 ) are disposed on an upper-layer (La) and a lower-layer of a dielectric core ( 1 ) to cause a difference in effective dielectric constants of individual parts through which even-mode and odd-mode electric flux of the TE coupling modes passes. A protrusion (Pc) is formed on a middle-layer Lb of the dielectric core ( 1 ) such that the effective dielectric constants of the parts through which even-mode and odd-mode electric flux of the TM coupling modes pass become substantially equal. Thereby, the TE 01delta _x mode and TE 01delta _y mode are coupled while restraining the coupling of the TM 01delta _x mode and the TM 01delta _y mode.
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