A 12-27 GHz SiGe BiCMOS VGA with phase shift variation compensation

作者：Li, Zhenrong^*; Liu, Xintong; Zhuang, Yiqi^*

来源：MICROELECTRONICS JOURNAL, 2017, 70: 97-106.

DOI：10.1016/j.mejo.2017.11.004

• Phase shift variation compensation
• dB-linear
• LC-ladder
• Inductor peaking
• BiCMOS technology
• VGA

This paper describes a 12-27 GHz VGA with low phase shift variation and dB-linear gain. A pre-distortion technique for extending the gain tuning range is employed to allow a dB-linear dynamic range of 31 dB, and a compensation structure for reducing the phase shift variation is adopted to make the phase shift varies less than 4 degrees within the entire gain range. Besides, a DAC cell is innovatively introduced to achieve the dB linearity and low phase shift variation balance. A fourth-order LC-ladder filter is used for input matching and a peak inductor technique is used to broaden bandwidth of the VGA. The proposed variable gain amplifier operating in Ku and K bands is implemented in 0.18 mu m BiCMOS technology. The simulation results show that the input and output return loss are less than -10 dB in the whole work frequency band, an IIP3 of -2.8 dBm, an IP1dB of -12 dBm and a power consumption of 62.1 mW are achieved at maximum gain mode in center frequency.

• 出版日期2017-12
• 单位西安电子科技大学