High-frequency transmission line
First Claim
1. A high-frequency transmission line comprising:
- a multilayer base body including a plurality of base materials stacked on top of one another;
a first ground conductor arranged on one main surface side of the multilayer base body;
a second ground conductor arranged on another main surface side of the multilayer base body;
a first signal line arranged within the multilayer base body and sandwiched between the first ground conductor and the second ground conductor, the first signal line being spaced apart from the first ground conductor by a first distance, the first signal line having a first line width; and
a second signal line arranged within the multilayer base body and sandwiched between the first ground conductor and the second ground conductor, the second signal line being spaced apart from the first ground conductor by a second distance, the second signal line having a second line width;
whereinthe first line width is larger than the second line width;
the first distance is longer than the second distance;
the second ground conductor includes a plurality of first opening portions arranged along the first signal line and a plurality of second opening portions arranged along the second signal line;
the first ground conductor faces the first signal line and the second signal line along an entire length of the first ground conductor;
the first ground conductor includes an area that overlaps the first signal line and the second signal line;
no openings are included in the area of the first ground conductor that overlaps the first signal line and the second signal line; and
a size of at least one of the plurality of the first opening portions is different from a size of at least one of the plurality of the second opening portions;
a signal strength of a high-frequency signal that flows through the first signal line is lower than a signal strength of a high-frequency signal that flows through the second signal line;
the first signal line is connected to an antenna for GPS communication; and
the second signal line is connected to an antenna for a wireless local area network or for short-range wireless communication.
1 Assignment
0 Petitions
Accused Products
Abstract
A first signal line is closer to a second ground conductor than a second signal line and, hence, crosstalk between the first and second signal lines is unlikely to be generated. By providing first opening portions in the second ground conductor, capacitive coupling between the first and second signal lines is reduced. Hence, in a transmission line including the first signal line, an increase in the capacitance due to the increased width of the first signal line is cancelled out by a decrease in the capacitance due to the increased distance from the first ground conductor and the first opening portions. Further, the width of the high-frequency transmission line need not be large. Further, since the capacitance is reduced by the first and second opening portions, the distances between the first ground conductor and the first and second signal lines are shortened.
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Citations
17 Claims
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1. A high-frequency transmission line comprising:
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a multilayer base body including a plurality of base materials stacked on top of one another; a first ground conductor arranged on one main surface side of the multilayer base body; a second ground conductor arranged on another main surface side of the multilayer base body; a first signal line arranged within the multilayer base body and sandwiched between the first ground conductor and the second ground conductor, the first signal line being spaced apart from the first ground conductor by a first distance, the first signal line having a first line width; and a second signal line arranged within the multilayer base body and sandwiched between the first ground conductor and the second ground conductor, the second signal line being spaced apart from the first ground conductor by a second distance, the second signal line having a second line width;
whereinthe first line width is larger than the second line width; the first distance is longer than the second distance; the second ground conductor includes a plurality of first opening portions arranged along the first signal line and a plurality of second opening portions arranged along the second signal line; the first ground conductor faces the first signal line and the second signal line along an entire length of the first ground conductor; the first ground conductor includes an area that overlaps the first signal line and the second signal line; no openings are included in the area of the first ground conductor that overlaps the first signal line and the second signal line; and a size of at least one of the plurality of the first opening portions is different from a size of at least one of the plurality of the second opening portions;
a signal strength of a high-frequency signal that flows through the first signal line is lower than a signal strength of a high-frequency signal that flows through the second signal line;
the first signal line is connected to an antenna for GPS communication; and
the second signal line is connected to an antenna for a wireless local area network or for short-range wireless communication. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification