A quad band WCDMA transceiver with fractional local divider

We developed a quad band (1, 6, 9, and 11) WCDMA transceiver with digital interface. The developed transceiver uses a 2/5 divider in the local part of the direct conversion architecture. Using the 2/5 divider, reduces the number of local synthesizers to only one in the architecture and avoid VCO pulling phenomena of the local synthesizer perfectly. This transceiver achieved 3% EVM and -46 dB ACLR, which is enough of a margin for standard specifications.