High-frequency module having a filter on a mounting substrate
A high-frequency module includes a mounting substrate and a filter. The filter includes a first RF terminal, a second RF terminal, and a ground terminal. The ground terminal is located between the first RF terminal and the second RF terminal in plan view in a thickness direction of the mounting substrate. The mounting substrate has a ground layer on a first principal surface. The ground terminal is formed by a solder bump and connected to the ground layer. The ground layer has a through-hole in contact with the ground terminal.
1 . A high-frequency module comprising:
a mounting substrate having a first principal surface and a second principal surface opposed to each other; and
a filter disposed at the first principal surface of the mounting substrate and configured to allow a high-frequency signal to pass therethrough, wherein
the filter includes
a first RF terminal,
a second RF terminal, and
a first ground terminal located between the first RF terminal and the second RF terminal in plan view in a thickness direction of the mounting substrate,
the mounting substrate has a ground layer on the first principal surface,
when the mounting substrate is seen in a direction orthogonal to a direction connecting the first RF terminal and the second RF terminal, at least a portion of the ground layer is disposed between the first RF terminal and the second RF terminal,
the first ground terminal comprises a solder bump and connected to the ground layer, and
the ground layer has a first through-hole in contact with the first ground terminal.
2 . The high-frequency module according to claim 1 , wherein
the ground layer has
a first portion connected to the first ground terminal,
a second portion disposed between the first RF terminal and the second RF terminal when seen in the direction orthogonal to the direction connecting the first RF terminal and the second RF terminal, and
at least two bridging parts connecting the first portion to the second portion, and
the at least two bridging parts form a portion of an edge of the first through-hole.
3 . The high-frequency module according to claim 2 , wherein
each of the at least two bridging parts has
a first end connected to the first portion, and
a second end connected to the second portion, and
a width of each of the at least two bridging parts narrows from the first end toward the second end.
4 . The high-frequency module according to claim 3 , wherein
the first through-hole provided to the ground layer includes a plurality of through-holes.
5 . The high-frequency module according to claim 3 , wherein
the filter further includes
a third RF terminal,
a fourth RF terminal, and
a second ground terminal different from the first ground terminal,
the second ground terminal is disposed between the third RF terminal and the fourth RF terminal in plan view in the thickness direction of the mounting substrate,
when the mounting substrate is seen in a direction orthogonal to a direction connecting the third RF terminal and the fourth RF terminal, at least a portion of the ground layer is disposed between the third RF terminal and the fourth RF terminal,
the second ground terminal comprises a solder bump and connected to the ground layer, and
the ground layer has a second through-hole in contact with the second ground terminal and different from the first through-hole.
6 . The high-frequency module according to claim 3 , wherein
the first RF terminal is an input terminal configured to receive the high-frequency signal, and
in plan view in the thickness direction of the mounting substrate, the ground layer overlaps a wiring path provided inside the mounting substrate and connected to the input terminal.
7 . The high-frequency module according to claim 2 , wherein
the first through-hole provided to the ground layer includes a plurality of through-holes.
8 . The high-frequency module according to claim 2 , wherein
the filter further includes
a third RF terminal,
a fourth RF terminal, and
a second ground terminal different from the first ground terminal,
the second ground terminal is disposed between the third RF terminal and the fourth RF terminal in plan view in the thickness direction of the mounting substrate,
when the mounting substrate is seen in a direction orthogonal to a direction connecting the third RF terminal and the fourth RF terminal, at least a portion of the ground layer is disposed between the third RF terminal and the fourth RF terminal,
the second ground terminal comprises a solder bump and connected to the ground layer, and
the ground layer has a second through-hole in contact with the second ground terminal and different from the first through-hole.
9 . The high-frequency module according to claim 2 , wherein
the first RF terminal is an input terminal configured to receive the high-frequency signal, and
in plan view in the thickness direction of the mounting substrate, the ground layer overlaps a wiring path provided inside the mounting substrate and connected to the input terminal.
10 . The high-frequency module according to claim 1 , wherein
the first through-hole provided to the ground layer includes a plurality of through-holes.
11 . The high-frequency module according to claim 10 , wherein
the filter further includes
a third RF terminal,
a fourth RF terminal, and
a second ground terminal different from the first ground terminal,
the second ground terminal is disposed between the third RF terminal and the fourth RF terminal in plan view in the thickness direction of the mounting substrate,
when the mounting substrate is seen in a direction orthogonal to a direction connecting the third RF terminal and the fourth RF terminal, at least a portion of the ground layer is disposed between the third RF terminal and the fourth RF terminal,
the second ground terminal comprises a solder bump and connected to the ground layer, and
the ground layer has a second through-hole in contact with the second ground terminal and different from the first through-hole.
12 . The high-frequency module according to claim 10 , wherein
the first RF terminal is an input terminal configured to receive the high-frequency signal, and
in plan view in the thickness direction of the mounting substrate, the ground layer overlaps a wiring path provided inside the mounting substrate and connected to the input terminal.
13 . The high-frequency module according to claim 1 , wherein
the filter further includes
a third RF terminal,
a fourth RF terminal, and
a second ground terminal different from the first ground terminal,
the second ground terminal is disposed between the third RF terminal and the fourth RF terminal in plan view in the thickness direction of the mounting substrate,
when the mounting substrate is seen in a direction orthogonal to a direction connecting the third RF terminal and the fourth RF terminal, at least a portion of the ground layer is disposed between the third RF terminal and the fourth RF terminal,
the second ground terminal comprises a solder bump and connected to the ground layer, and
the ground layer has a second through-hole in contact with the second ground terminal and different from the first through-hole.
14 . The high-frequency module according to claim 13 , wherein
the filter further includes
a third ground terminal, and
a fourth ground terminal,
the third ground terminal is disposed between the first RF terminal and the third RF terminal, and the fourth ground terminal is disposed between the second RF terminal and the fourth RF terminal, in plan view in the thickness direction of the mounting substrate,
each of the third ground terminal and the fourth ground terminal comprises a solder bump and connected to the ground layer,
when the mounting substrate is seen in a direction orthogonal to a direction connecting the first RF terminal and the third RF terminal, at least a portion of the ground layer is disposed between the first RF terminal and the third RF terminal,
when the mounting substrate is seen in a direction orthogonal to a direction connecting the second RF terminal and the fourth RF terminal, at least a portion of the ground layer is disposed between the second RF terminal and the fourth RF terminal, and
the ground layer further has a third through-hole in contact with the third ground terminal and a fourth through-hole in contact with the fourth ground terminal.
15 . The high-frequency module according to claim 14 , wherein
the first RF terminal and the second RF terminal are aligned in a first direction, and the third RF terminal and the fourth RF terminal are aligned in the first direction, and
the first RF terminal and the third RF terminal are aligned in a second direction orthogonal to the first direction, and the second RF terminal and the fourth RF terminal are aligned in the second direction.
16 . The high-frequency module according to claim 13 , wherein
the first RF terminal is an input terminal configured to receive the high-frequency signal, and
in plan view in the thickness direction of the mounting substrate, the ground layer overlaps a wiring path provided inside the mounting substrate and connected to the input terminal.
17 . The high-frequency module according to claim 1 , wherein
the first RF terminal is an input terminal configured to receive the high-frequency signal, and
in plan view in the thickness direction of the mounting substrate, the ground layer overlaps a wiring path provided inside the mounting substrate and connected to the input terminal.
18 . A communication device comprising:
the high-frequency module according to claim 1 ; and
a signal processing circuit configured to process the high-frequency signal passing through the high-frequency module.
19 . A high-frequency module comprising:
a mounting substrate having a first principal surface and a second principal surface opposed to each other; and
a filter disposed at the first principal surface of the mounting substrate and configured to allow a high-frequency signal to pass therethrough, wherein
the filter includes
a first RF terminal,
a second RF terminal, and
a ground terminal located between the first RF terminal and the second RF terminal in plan view in a thickness direction of the mounting substrate,
the mounting substrate has a ground layer on the first principal surface,
when the mounting substrate is seen in a direction orthogonal to a direction connecting the first RF terminal and the second RF terminal, at least a portion of the ground layer is disposed between the first RF terminal and the second RF terminal,
the ground layer has
a first portion connected to the ground terminal,
a second portion disposed between the first RF terminal and the second RF terminal when seen in the direction orthogonal to the direction connecting the first RF terminal and the second RF terminal, and
at least two bridging parts connecting the first portion to the second portion, and
the ground terminal comprises a solder bump and connected to each of the at least two bridging parts.
20 . The high-frequency module according to claim 19 , wherein
in each of the at least two bridging parts, a width of a portion connected to the ground layer is shorter than a diameter of the ground terminal.