| 摘要 |
PROBLEM TO BE SOLVED: To provide a high-frequency input/output terminal having less loss over a wide frequency band of tens of GHz which is satisfactory in transmission characteristics. SOLUTION: There are provided a dielectric substrate 1, where there is a recess 3 on the lower surface and a ground conductor 4 is formed on the lower surface around the recess 3, dielectrics so bonded on the upper surface of the dielectric substrate 1 as to face the central part of the recess 3 or a wall member 2 comprising the dielectrics, a pair of line conductors 5 and 5 formed to be in a straight to each other on both sides of the wall member 2 on the upper surface of the dielectrics substrate 1, which each of tip parts face each other at both side parts of the recess 3, a ground conductor 6 in identical plane formed on both sides of the line conductors 5 and 5, and a lower surface side line conductor 8 which is so formed on the bottom surface of the recess 3 of the dielectric substrate 1 as straight with the pair of line conductors 5 and 5, while being in parallel and connected electrically to the each tip part of the pair of line conductors 5 and 5 by both ends with through-conductors 7 and 7. |
