Patent ID: 7536163

Claim:
A method of converting a frequency of an ultra wide band (UWB) communication high frequency signal received from an antenna in an ultra wide band (UWB) communication system transmitting and receiving using at least two reference frequencies, comprising: generating generation frequencies having frequencies set to convert the frequency of the high frequency signal; mixing the high frequency signal with a portion of the generation frequencies to generate a mixed signal; and mixing the mixed signal with other generation frequencies, other than the portion of the generation frequencies, to generate low frequency signals used in the UWB communication system, wherein the at least two reference frequencies comprise at least one of 3432 MHz, 3960 MHz, and 4488 MHz, wherein the reference frequencies respectively correspond to frequencies of sub-bands of a frequency band for UWB communication, and wherein the mixing of the high frequency signal and the portion of the generation frequencies generates an intermediate frequency signal and the mixing of the mixed signal and the other generation frequencies to generate low frequency signals used in the UWB communication system comprises: mixing the high frequency signal with one of the generation frequencies 2112 MHz, 2640 MHz and 3168 MHz to generate the intermediate frequency; and mixing the intermediate frequency with the generation frequency of 1320 MHz.