| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a high frequency circuit board capable of virtually grounding a chip side and efficiently converting a transmission mode. <P>SOLUTION: A microstrip line 10 comprises a signal strip conductor 11 and a ground conductor 15. A coplanar line 20 comprises a signal strip conductor 21 connected with the signal strip conductor 11 by a wire 24, an area 20a composed of a ground strip conductor 22 continued to the ground conductor 15, and an area 20b where a ground strip conductor 23 connected by through-hole is formed at the upper part of the ground strip conductor 22. The transmission mode is changed in the order of the microstrip line 10, the area 20a and the area 20b. Thus, the transmission mode is efficiently converted from the microstrip line to the coplanar line. <P>COPYRIGHT: (C)2008,JPO&INPIT |
