| 摘要 |
A configurable dual-band RF transceiver with a cascaded frequency conversion scheme (DBXVR) is disclosed for the processing of any selected RF channel signal specified by the open standard IEEE 802.11 a/b/g for Wireless LAN. The DBXVR comprises two switchably connected antennae for receiving and transmitting any selected RF channel signal and two subsets of signal processing hardware. The first signal processing subset is designed to perform all related frequency conversion, signal filtering and amplification between the b/g-band and its corresponding Baseband Inphase (I) and Quadrature (Q) signals. The second signal processing subset is designed to perform all related frequency conversion, signal filtering and amplification between the a-band, located at a disjointed and much higher frequency range than the b/g-band, and its corresponding b/g-band frequency for an ultimate, cascaded second signal processing into the Baseband I and Q signals using essentially the same hardware from the first signal processing subset.
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