Chip antenna element, antenna apparatus and communications apparatus comprising same

A chip antenna element comprising

• (a) a radiation electrode formed on at least one surface of said substrate, such that said radiation electrode extends from a first end of said substrate or its vicinity to a second end of said substrate or its vicinity, with a width decreasing substantially continuously and/or stepwise, thereby having a wide rear end on the side of the first end of said substrate and a narrow tip end on the side of the second end of said substrate,
• (b) a grounding electrode opposing a tip end of said radiation electrode via a gap, and
• (c) a feeding electrode formed on at least one adjacent side surface of said substrate laterally with respect to a longitudinal direction of said radiation electrode, with or without contact with said radiation electrode.

An antenna apparatus comprising a chip antenna element mounted onto a circuit board, said chip antenna element comprising

• (a) a grounding electrode formed on at least a first end surface at said first end of an insulating substrate,
• (b) a radiation electrode formed on at least one surface of said substrate, such that said radiation electrode extends from said grounding electrode with or without a gap to a second end of said substrate or its vicinity, with a width decreasing substantially continuously and/or stepwise, thereby having a wide rear end on the side of the first end of said substrate and a narrow tip end on the side of the second end of said substrate, and
• (c) a feeding electrode formed on at least one adjacent side surface of said substrate laterally with respect to a longitudinal direction of said radiation electrode, with or without contact with said radiation electrode, said radiation electrode being in parallel with an edge of a ground conductor of said circuit board, and an open tip end of said radiation electrode being not close to said ground conductor.

An antenna apparatus comprising a chip antenna element mounted onto a circuit board, said chip antenna element comprising

• (a) a radiation electrode formed on at least one surface of said substrate, such that said radiation electrode extends from a first end of said substrate or its vicinity to a second end of said substrate or its vicinity, with a width decreasing substantially continuously and/or stepwise, thereby having a wide rear end on the side of the first end of said substrate and a narrow tip end on the side of the second end of said substrate,
• (b) a grounding electrode opposing a tip end of said radiation electrode via a gap, and
• (c) a feeding electrode formed on at least one adjacent side surface of said substrate laterally with respect to a longitudinal direction of said radiation electrode, with or without contact with said radiation electrode, said radiation electrode being in parallel with an edge of a ground conductor of said circuit board, and an open tip end of said radiation electrode being not close to said ground conductor.

A communications apparatus comprising an antenna apparatus comprising a chip antenna element mounted onto a circuit board, said chip antenna element comprising

• (a) a grounding electrode formed on at least a first end surface at said first end of an insulating substrate,
• (b) a radiation electrode formed on at least one surface of said substrate, such that said radiation electrode extends from said grounding electrode with or without a gap to a second end of said substrate or its vicinity, with a width decreasing substantially continuously and/or stepwise, thereby having a wide rear end on the side of the first end of said substrate and a narrow tip end on the side of the second end of said substrate, and
• (c) a feeding electrode formed on at least one adjacent side surface of said substrate laterally with respect to a longitudinal direction of said radiation electrode, with or without contact with said radiation electrode, said radiation electrode being in parallel with an edge of a ground conductor of said circuit board, and an open tip end of said radiation electrode being not close to said ground conductor.

A communications apparatus comprising an antenna apparatus comprising a chip antenna element mounted onto a circuit board, said chip antenna element comprising

• (a) a radiation electrode formed on at least one surface of said substrate, such that said radiation electrode extends from a first end of said substrate or its vicinity to a second end of said substrate or its vicinity, with a width decreasing substantially continuously and/or stepwise, thereby having a wide rear end on the side of the first end of said substrate and a narrow tip end on the side of the second end of said substrate,
• (b) a grounding electrode opposing a tip end of said radiation electrode via a gap, and
• (c) a feeding electrode formed on at least one adjacent side surface of said substrate laterally with respect to a longitudinal direction of said radiation electrode, with or without contact with said radiation electrode, said radiation electrode being in parallel with an edge of a ground conductor of said circuit board, and an open tip end of said radiation electrode being not close to said ground conductor.