| 摘要 |
A digital door lock apparatus for use with a portable personal identification unit is provided to communicate in long distance by forming low frequency antenna with nonmetal. A digital door lock apparatus is composed of a front unit(10), a main unit(20), a MOTIS(Message Oriented Text Interchange Systems)(30). A low-frequency antenna(102) is composed of a reset switch(104), a light emitting diode(106), a fob key start button(108), keypad(110), and a super high frequency UHF antenna(112). The low-frequency antenna is used in order to generate an electro magnetic wave signal of the low frequency, and the flexible printed circuit board(114) is connected to the low-frequency antenna.
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