| 摘要 |
<p>An antenna according to an exemplary embodiment includes an inner core, a coaxial line which surrounds an inner core, a first antenna arm which is electrically connected to the inner core, and a second antenna arm which is electrically connected to an outer core and surrounds the coaxial line. The first antenna arm includes a first antenna body which is electrically connected to the inner core of the coaxial line, and a first radiation pattern controlling part which surrounds the first antenna body. The second antenna arm includes a second radiation pattern control part which surrounds the coaxial line. The antenna controls the radiation pattern by using ferrite, can symmetrically radiate electromagnetic waves, and may have a simple structure for easily being inserted into a narrow tube.</p> |
