| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a monolithic microwave integrated circuit wherein the chip size of a directional coupler is miniaturized. <P>SOLUTION: In the monolithic microwave integrated circuit equipped with a semi-insulated dielectric substrate 10 with a ground conductor provided on its one side, a main transmission line 11 and a sub transmission line 12 which are formed on the other side of the semi-insulated dielectric substrate 10 and have parallel blocks mutually extending parallel, in the range of the parallel blocks from the downside of the main transmission line 11 to the downside of the sub transmission line 12, a thin portion 17 is provided by partially thinning the semi-insulated dielectric substrate 10. <P>COPYRIGHT: (C)2004,JPO |
