Abstract: A card device for performing high-speed wireless data communication faster and more stable than a wireless data communication via an existing USB interface and UART serial bus interface is provided, including an antenna for transmitting and receiving a RF signal, a RF signal converter for converting the RF signal received by the antenna into a baseband signal and converting an internal data signal into an RF signal, and a mobile communication modem for outputting the internal data signal to the RF signal converter, receiving the baseband signal from the RF signal converter, checking whether a dual port RAM is accessible, and performing a data transmission/receiving operation with the dual port RAM when the dual port RAM is accessible. The dual port RAM has two ports connected respectively to the mobile communication modem and a PCMCIA interface and interfaces a data transmission/receiving operation between the mobile communication modem and the PCMCIA interface.

Abstract: A card device for high-speed wireless data communication. The card device comprises an antenna for transmitting and receiving RF signals, an RF signal converter for converting an external RF signal received by the antenna into a baseband signal and converting an internal data signal to be externally transmitted into an RF signal, and a mobile communication modem for outputting data to be transmitted through the antenna, to the RF signal converter, receiving data received by the antenna from the RF signal converter, checking whether a dual port RAM is accessible, and performing a data input/output operation with the dual port RAM if the dual port RAM is accessible. The dual port RAM has two ports connected respectively to the mobile communication modem and a PCMCIA interface. The dual port RAM relays data transmission/reception accesses between the mobile communication modem and the PCMCIA interface. The PCMCIA interface is connected to a personal computer according to a PCMCIA protocol.