To provide a structure for an antenna system wherein the space occupied by a full ground conductor and a radiation conductor part required for an inverse F antenna is reduced while keeping the characteristics as the inverse F antenna, impedance matching can be easily implemented even when a separation distance between the radiation conductor part and a printed circuit board is made small, and an excessive projection does not occur in the radiation conductor part within a system case, and to reduce the costs by further reducing the space occupied by the entire system and simplifying its constitution.
In the antenna system provided with a printed circuit board on which the ground conductor part is disposed, the radiation conductor part disposed away from the printed circuit board, a short-circuit conductor part for short-circuiting one terminal of the radiation conductor part and the ground conductor part, and a feeding conductor part for feeding high frequency signals to the radiation conductor part, the radiation conductor part is line-shaped or band-shaped, bent to be U-shaped, and disposed approximately parallel with the printed circuit board.
| JP2007142977 | TUNABLE ANTENNA AND ITS CONTROL METHOD |
| JP2002271131 | PLANAR ANTENNA |
| JPH07271938 | INFORMATION CARD |
IIZUKA TAKASHI
AOKI YOSHINAO
FUKUSHIMA FUMITAKA
KOBAYASHI YUKIO
TOYO KEIKI CO LTD
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