ANTENNA STRUCTURE AND RADIO COMMUNICATION DEVICE USING THE SAME
First Claim
1. An antenna structure comprising:
- a surface mount antenna comprising a radiation electrode performing an antenna operation, formed on a substrate; and
a board having a ground region having a ground electrode formed thereon and a non-ground region not having the ground region formed thereon,the antenna structure having a configuration in which the surface mount antenna is mounted on the non-ground region of the board,whereinone end of the radiation electrode of the surface mount antenna is a ground connection portion to be grounded to the ground electrode of the board and the other end of the radiation electrode is an open end,the radiation electrode has a feeding section capacitively fed with power at a position between the ground connection portion and the open end,a ground connection electrode is formed on the substrate of the surface mount antenna, the ground connection electrode being capacitively coupled with the open end of the radiation electrode to electrically connect the open end of the radiation electrode to the ground electrode of the board via a capacitance, anda feeding electrode is formed on the board, the feeding electrode capacitively feeding power to the feeding section of the radiation electrode of the surface mount antenna.
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Accused Products
Abstract
A radiation electrode is formed on a substrate of a surface mount antenna. One end of the radiation electrode forms a ground connection portion connected to ground, and the other end of the radiation electrode forms an open end. A ground connection electrode for connecting the open end of the radiation electrode to ground via a capacitance is provided on the substrate. No feeding electrode for feeding power to the radiation electrode is provided on the substrate. This surface mount antenna is mounted on a non-ground region (a region on which a ground electrode is not formed) of a board so as to constitute an antenna structure. On the board of the antenna structure, a feeding electrode for capacitively feeding power to the radiation electrode is provided at a position between the ground connection portion and the open end.
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Citations
10 Claims
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1. An antenna structure comprising:
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a surface mount antenna comprising a radiation electrode performing an antenna operation, formed on a substrate; and a board having a ground region having a ground electrode formed thereon and a non-ground region not having the ground region formed thereon, the antenna structure having a configuration in which the surface mount antenna is mounted on the non-ground region of the board, wherein one end of the radiation electrode of the surface mount antenna is a ground connection portion to be grounded to the ground electrode of the board and the other end of the radiation electrode is an open end, the radiation electrode has a feeding section capacitively fed with power at a position between the ground connection portion and the open end, a ground connection electrode is formed on the substrate of the surface mount antenna, the ground connection electrode being capacitively coupled with the open end of the radiation electrode to electrically connect the open end of the radiation electrode to the ground electrode of the board via a capacitance, and a feeding electrode is formed on the board, the feeding electrode capacitively feeding power to the feeding section of the radiation electrode of the surface mount antenna. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A radio communication device comprising a high-frequency circuit for radio communication at one or more communication frequency;
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an antenna structure comprising; a surface mount antenna a radiation electrode performing an antenna operation, formed on a substrate; and a board having a ground region having a ground electrode formed thereon and a non-ground region not having the ground region formed thereon, the antenna structure having a configuration in which the surface mount antenna is mounted on the non-ground region of the board, wherein one end of the radiation electrode of the surface mount antenna is a ground connection portion to be grounded to the ground electrode of the board and the other end of the radiation electrode is an open end, the radiation electrode has a feeding section capacitively fed with power at a position between the ground connection portion and the open end, a ground connection electrode is formed on the substrate of the surface mount antenna, the ground connection electrode being capacitively coupled with the open end of the radiation electrode to electrically connect the open end of the radiation electrode to the ground electrode of the board via a capacitance, and a feeding electrode is formed on the board, the feeding electrode capacitively feeding power to the feeding section of the radiation electrode of the surface mount antenna. - View Dependent Claims (8, 9, 10)
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Specification