Patent ID: 7466999

Claim:
A wireless communication device capable of switching to an external antenna module or an internal antenna module, the wireless communication device comprising: a housing; an internal antenna module installed within the housing for transmitting wireless communication signals; a direct current (D/C) power source for providing power; a signal processing module installed within the housing for processing the wireless communication signals; a first low noise amplifier coupled to the internal antenna module for amplifying the wireless communication signal received by the internal antenna module, the first low noise amplifier comprising: a signal input end coupled to the internal antenna module for receiving the wireless communication signals transmitted from the internal antenna module; a power input end for receiving direct current provided from the D/C power source; and a signal output end for outputting the amplified wireless communication signals; a switch comprising: a first terminal coupled to a second low noise amplifier of an external antenna module; a second terminal coupled to the signal processing module, the D/C power source, and the first terminal; and a third terminal coupled to the signal output end of the first low noise amplifier, the power input end, and the second terminal; a first equivalent inductance coupled to the D/C power source and the second terminal for blocking wireless communication signals; a second equivalent inductance coupled to the power input end of the first low noise amplifier and the third terminal for blocking wireless communication signals; a first capacitance coupled to the signal output end of the first low noise amplifier and the third terminal for blocking direct current; and a second capacitance coupled to the signal processing module and the second terminal for blocking direct current.