CPC H05K 1/025 (2013.01) [H01P 5/08 (2013.01); H05K 1/118 (2013.01); H05K 1/147 (2013.01); H05K 2201/0191 (2013.01); H05K 2201/058 (2013.01)] | 16 Claims |
1. A high-frequency circuit comprising:
a printed circuit board; and
a flexible circuit board being connected to the printed circuit board,
the printed circuit board includes:
a first dielectric layer having a first surface and a second surface, on the first surface a first ground conductor being formed;
a second dielectric layer having a third surface and a fourth surface, on the fourth surface a second ground conductor being formed; and
a plurality of first signal lines wired between the second surface and the third surface,
the flexible circuit board includes:
a third dielectric layer having a fifth surface and a sixth surface, on the fifth surface a third ground conductor being formed;
a fourth dielectric layer having a seventh surface and an eighth surface, on the eighth surface a fourth ground conductor being formed; and
a plurality of second signal lines wired between the sixth surface and the seventh surface,
wherein a connecting portion that is a portion between the printed circuit board and the flexible circuit board, includes:
a plurality of first connecting conductors each having a first end and a second end, each of the first ends being connected to the corresponding first signal line, each of the second ends being exposed from the fourth surface without conducting the second ground conductor, the plurality of first connecting conductors including a first connecting conductor and a second connecting conductor, the plurality of first signal lines and the plurality of second signal lines extending in a signal transmission direction, a position of the first connecting conductor in the signal transmission direction and a position of the second connecting conductor in the signal transmission direction being different;
a plurality of second connecting conductors each having a first end and a second end, each of the first ends being exposed from the fifth surface without conducting the third ground conductor and being connected to the second end of the corresponding first connecting conductor, each of the second ends being connected to the corresponding second signal line;
a first ground connecting conductor being disposed between the plurality of first signal lines at the position of the first connecting conductor in the signal transmission direction and having a first end and a second end, the first end of the first ground connecting conductor being connected to the first ground conductor, the second end of the first ground connecting conductor being connected to the second ground conductor; and
a second ground connecting conductor being disposed between the plurality of first signal lines at the position of the second connecting conductor in the signal transmission direction and having a first end and a second end, the first end of the second ground connecting conductor being connected to the first ground conductor, the second end of the second ground connecting conductor being connected to the second ground conductor.
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