This work presents an Ultra-Wideband (UWB) in-phase/quadrature (I/Q) demodulator, and a reconfigurable wideband (I/Q) modulator using 130 ​nm CMOS process for multi-standard applications. The proposed designs are suitable for multi-band or wideband LTE RF transceiver. Both the RF stage in the demodulator, and the IF stage in the modulator are implemented using Capacitive Cross Coupling (CCC) common-gate configuration to enhance bandwidth and increase gain at a moderate power consumption. Furthermore, the reconfigurability of the modulator is achieved by matching the RF port by means of a high coupling wideband five ports transformer and a bank of switched capacitors for proper channel selection. The demodulator consumes 10.5 ​mW from a 1.2 ​V supply and it has conversion gain (CG) of 10 ​dB with 3-dB bandwidth of 9 ​GHz (1–10 ​GHz). The demodulator input 1-dB compression point (P1dB) is −4.15 dBm at 4.5 ​GHz, and the LO-to-RF isolation is better than −45 dB due to compact and fully symmetrical layout where the active area is 0.22$m{m}^2$. The modulator demonstrates a CG of 6.8 ​± ​1.5 ​dB in the frequency band 1.5–4 ​GHz, where the maximum CG equals 8.32 ​dB ​at LO power of 3 dBm, and output 1 ​dB compression point (OP_1 ​dB) equals −1.6 dBm. Also, the LO suppression and the harmonic suppression in the modulator are less than −50 ​dBc, and −60 ​dBc, respectively. The modulator active area is 0.55$m{m}^2$and its power consumption is 16.6 ​mW from a 1.2 ​V supply.

这项工作提出了一种超宽带（UWB）同相/正交（I / Q）解调器，以及使用130 nm CMOS工艺用于多标准应用的可重构宽带（I / Q）调制器。提出的设计适用于多频带或宽带LTE RF收发器。解调器中的RF级和调制器中的IF级均使用电容交叉耦合（CCC）共栅配置实现，以在中等功耗下提高带宽并增加增益。此外，调制器的可重构性是通过使用高耦合宽带五端口变压器和一组开关电容器来匹配射频端口以进行正确的信道选择而实现的。解调器从1.2 V电源消耗10.5 mW的功率，其转换增益（CG）为10 dB，3 dB带宽为9 GHz（1-10 GHz）。$米{米}^2$。调制器在1.5–4 GHz频段内的CG值为6.8±1.5 dB，在3 dBm的LO功率下，最大CG等于8.32 dB，并输出1 dB压缩点（OP_1 dB ）等于-1.6 dBm。此外，调制器中的LO抑制和谐波抑制分别小于−50 dBc和−60 dBc。调制器有效面积为0.55$米{米}^2$在1.2 V电源下的功耗为16.6 mW。