| 摘要 |
A plane antenna of the present invention gives the realisation of a surface mounting construction on a circuit base board, the enlargement of a mounting area for components, and the improvement of an SN ratio by avoiding the influence of a noise from a back face side of the mounting base board. The plane antenna mounted on the circuit base board has a dielectric substrate (100) and a junction conductor (114), and realises the surface mounting construction. The dielectric substrate (100) is provided on the circuit base board (108), and an antenna pattern part is mounted on the dielectric substrate. To a feeding point of the antenna pattern part (102) one end portion of the junction conductor is connected (114), and its the other end portion is connected to a feeding conductor of the circuit base board (108) at a side of a mounting face of the antenna element of the circuit base board. According to a construction like this, the surface mounting construction on the circuit base board (108) is realised. <IMAGE>
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