| 摘要 |
An internal antenna having variable impedance is provided to acquire an antenna with no change of total impedance when a folder is opened or closed by adjusting coupling of a slit according to closing or opening of the folder. An internal antenna having variable impedance includes a dielectric substance, a radiator(10), a ground plane(16), and a patch. The radiator(10) is formed on the dielectric substance. A slit(14) is formed on the radiator(10). The ground plane(16) has a different shape and/or size under a first use state and a second use state. The patch is apart from the radiator(10) according to the use state of a terminal. The patch is arranged on a first position which is opposite to the slit(14). The patch is electrically coupled to the slit(14) of the radiator(10).
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