| 摘要 |
PROBLEM TO BE SOLVED: To realize a high-frequency circuit board where high-frequency signals are prevented from deteriorating as they are transmitted, wherein the high-frequency signal circuit board is composed of a dielectric board and transmission lines formed on its front and rear surface and connected together through a through-hole. SOLUTION: A pair of transmission lines composed of coplanar lines 21, 22, 21' and 22' with ground are provided to the front and rear of a dielectric board 1, and the coplanar lines are electrically connected through through-holes 41 and 42. The coplanar lines are each surrounded with ground electrodes 30 and 30', a distance between the coplanar lines and the ground electrodes is set wider near the through-holes. By this setup, high-frequency signals can be lessened in transmission loss caused by through-holes, so that a high-frequency circuit board of this constitution is capable of transmitting high-frequency signals restraining them from deteriorating even if a mounted module MMIC is a high-frequency circuit module. |
