| 摘要 |
PURPOSE:To realize the antenna at a low cost with high performance by utilizing the advantages and compensating the disadvantages of an external antenna and a built-in antenna. CONSTITUTION:A radio unit 12 and a transmission built-in antenna 13 are provided in an equipment main body 11, and an external antenna 14 in which a nonconductive antenna case 15 with antenna elements 17 contained therein is mounted to the equipment main body 11 via a rotary moving, part 16 is provided as the reception antenna and the antenna element 17 is provided with antenna patterns 19a-19c provided on a line on a thin and long printed circuit board 18 and coils 20a,20b loaded decentralizingly between the antenna patterns. |
