A simple Cascaded double balanced mixer working at 2.4 GHz, for WLAN application was designed and using 90 nm CMOS technology. The proposed mixer incorprates minimum number of transistors in comparing with the gilbercell mixer. Staking LO stage just above the RF stage reducing the voltage headroom of mixer. Differential combination of RF stage has a common source node and the Differential combination of LO stage has common drain node. Differential combination for both RF and LO stage cancels the feed through error of higher order harmonic signals, improving the linearity of the mixer.Both RF and LO stage contributes to the overall transconductance of the mixer, improving the conversion gain of the mixer. The simulated response of the proposed mixer shows a Conversion gain of 12 dB, IIP3 point of 8.3 dBm and one dB compression point of 8.5 dBm.

设计了一个简单的级联双平衡混频器，其工作频率为2.4 GHz，用于WLAN应用，并使用90 nm CMOS技术。与gilbercell混频器相比，该混频器结合了最少数量的晶体管。将LO级放到RF级的正上方，可降低混频器的电压裕量。RF级的差分组合具有公共的源极节点，LO级的差分组合具有公共的漏极节点。RF和LO级的差分组合消除了高阶谐波信号的馈通误差，从而改善了混频器的线性度.RF和LO级均有助于混频器的整体跨导，从而改善了混频器的转换增益。所提出的混频器的模拟响应显示出12 dB的转换增益，8.3 dBm的IIP3点和8.5 dBm的1 dB压缩点。