| 摘要 |
An inner antenna using a BALUN(BALun to UNbalance transformer) for a mobile terminal is provided to stably maintain antenna performance by an expanded frequency band in spite of a frequency shift due to human effect. An inner antenna using a BALUN for a mobile terminal includes a wiring substrate(110), a radiating plate(120), strip lines(116), and a BALUN chip. The wiring substrate is received in a body and has a ground pad(112) and a feed pad(114) on one surface. The radiating plate is arranged on one surface of the wiring substrate to be coupled to the ground pad and the feed pad. The strip lines are drawn out from the feed pad to be connected to a duplexer(130). The BALUN chip is installed between the strip lines to expand a frequency bandwidth.
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