Electronic device

An electronic device, comprising:

• a first circuit board including a first main surface and a second main surface opposite to each other;
• and
• a second circuit board including a first portion facing the first main surface, a second portion facing the second main surface, and a bent portion connecting the first portion and the second portion to each other;
• wherein
• the second circuit board includes:
• a circuit portion defining the first portion, the bent portion, and the second portion and having insulating properties;
• a plurality of signal conductors on the circuit portion, extending in a first direction in which the first portion, the bent portion, and the second portion are connected, and being spaced apart from each other in a second direction orthogonal or substantially orthogonal to the first direction;
• and
• a first opening between the plurality of signal conductors when viewed in a thickness direction of the circuit portion;
• the first opening extends from at least one of the first portion or the second portion to the bent portion;
• the first portion and the second portion each include a portion not including the first opening between the plurality of signal conductors;
• the second circuit board includes a planar ground conductor on the circuit portion of the second circuit board, facing the plurality of signal conductors, and spaced apart from the plurality of signal conductors in the thickness direction of the circuit portion;
• and
• the second circuit board has a strip line structure.

An electronic device, comprising:

• a first circuit board including a first main surface and a second main surface opposite to each other;
• and
• a second circuit board including a first portion facing the first main surface, a second portion facing the second main surface, and a bent portion connecting the first portion and the second portion to each other;
• wherein
• the second circuit board includes:
• a circuit portion defining the first portion, the bent portion, and the second portion and having insulating properties;
• a plurality of signal conductors on the circuit portion, extending in a first direction in which the first portion, the bent portion, and the second portion are connected, and being spaced apart from each other in a second direction orthogonal or substantially orthogonal to the first direction;
• and
• a first opening between the plurality of signal conductors when viewed in a thickness direction of the circuit portion;
• the first opening extends from at least one of the first portion or the second portion to the bent portion;
• the first portion and the second portion each include a portion not including the first opening between the plurality of signal conductors;
• and
• the circuit portion included in the second circuit board has a dielectric loss tangent lower than a dielectric loss tangent of a circuit portion included in the first circuit board.

An electronic device, comprising:

• a first circuit board including a first main surface and a second main surface opposite to each other;
• and
• a second circuit board including a first portion facing the first main surface, a second portion facing the second main surface, and a bent portion connecting the first portion and the second portion to each other;
• wherein
• the second circuit board includes:
• a circuit portion defining the first portion, the bent portion, and the second portion and having insulating properties;
• a plurality of signal conductors on the circuit portion, extending in a first direction in which the first portion, the bent portion, and the second portion are connected, and being spaced apart from each other in a second direction orthogonal or substantially orthogonal to the first direction;
• and
• a first opening between the plurality of signal conductors when viewed in a thickness direction of the circuit portion;
• the first opening extends from at least one of the first portion or the second portion to the bent portion;
• the first portion and the second portion each include a portion not including the first opening between the plurality of signal conductors;
• a planar antenna conductor is located on the first main surface of the first circuit board;
• and
• the second circuit board is connected to the planar antenna conductor.

An electronic device, comprising:

• a first circuit board including a first main surface and a second main surface opposite to each other;
• and
• a second circuit board including a first portion facing the first main surface, a second portion facing the second main surface, and a bent portion connecting the first portion and the second portion to each other;
• wherein
• the second circuit board includes:
• a circuit portion defining the first portion, the bent portion, and the second portion and having insulating properties;
• a plurality of signal conductors on the circuit portion, extending in a first direction in which the first portion, the bent portion, and the second portion are connected, and being spaced apart from each other in a second direction orthogonal or substantially orthogonal to the first direction;
• and
• a first opening between the plurality of signal conductors when viewed in a thickness direction of the circuit portion;
• the first opening extends from at least one of the first portion or the second portion to the bent portion;
• the first portion and the second portion each include a portion not including the first opening between the plurality of signal conductors;
• the second circuit board includes an auxiliary opening between the plurality of signal conductors when viewed in the thickness direction of the circuit portion of the second circuit board;
• the auxiliary opening overlaps a vertex of the bent portion;
• and
• the auxiliary opening is spaced apart from the first opening and the second opening in the first direction.