| 摘要 |
PURPOSE: A multi-band built-in loop antenna with a vertically symmetrical structure is provided to expand the fundamental frequency and the bandwidth of high frequency band by adjusting the spaces among a plurality of open loops. CONSTITUTION: An upper loop(11) and a lower loop(12) are formed to be vertically symmetrical in the upper side and the lower side of a dielectric substrate of a preset size. An open loop pattern forms one or more open loops(13,14) by forming one or more bending points in the center between the upper loop and the lower loop. A turnaround unit(15) is formed on one end of the open loop pattern. A through hole connects the upper loop pattern and the lower loop pattern which are formed near the open loop pattern. A power feeding unit(25) feeds power to the upper loop pattern. A grounding unit(26) grounds the lower loop pattern. |
