| 摘要 |
PURPOSE:To reduce the total length considerably, to prevent the structure from being complicated, to avoid the manufacture cost from being increased and to facilitate the handling by improving the diversity antenna. CONSTITUTION:A tip side sleeve antenna E whose length is lambda/2 and a base side sleeve antenna F whose length is lambda/2 are arranged concentrically. Then part of an outer conductor of coaxial lines 11, 12 for feeding the side sleeve antenna E is used in common for a lever element of the base side sleeve antenna F and a stub 10 whose length is lambda/4 is arranged to the base. |
