Design Of A 22-29GHz UWB Amplifier

Due to the increasing demands for broadband wireless communication, high frequency bands such as microwave and millimeter-wave where there is sufficient spectrum are of growing interest. Based on the investigations on research works about amplifiers within 22GHz to 29GHz the previous researchers had done. Up to now, amplifiers realized within 22GHz to 29GHz have high DC power consumption over 10mw and most of them are narrow band or focusing on single frequency. Even some wideband amplifiers within or close to 22GHz to 29GHz are realized but with low gain and bad return losses. However, for transmissions UWB vehicular radar Systems, it requires amplifiers with wider band operation and proper gain with lower DC consumption. Based on these requirements and the purpose to do some improvements on previous work researchers had done, a sub-millimeter wave UWB amplifier using 0.13um CMOS technology ranging from 22GHz to 29GHz with DC consumption lower than 10mw but with acceptable gain and return loss is the research goal of this thesis, In the design, the simulation tool is Advanced Design System ADS 2006.By adopting the new current-reuse topology, the proposed UWB amplifier consumes only 9.85mw DC power from 1.5V supply which is the lowest DC consumption within this band up to now. Meanwhile, by introducing the new feedback network in the first stage and an inductive feedback network in the second stage, the proposed UWB amplifier with the peaking gain 12.5dB at 25.2GHz has gain over 10dB in the whole band and acceptable VSWR with (VSWR)IN <2.72 and (VSWR)OUT <2. Compared to the recent high frequency amplifiers in 22-29GHz frequency band, to the author's best knowledge, the designed amplifier has the lowest DC consumption but the highest Gain max / PDC.Due to the limitation of research time, the research results are only the simulation results. Therefore, in the future work, we will focus on the design of the first stage's supply circuit, layout and chip-test.