A 245 GHz CB LNA in SiGe

The paper presents a four stage 245 GHz LNA in SiGe technology. Common base (CB) topology is chosen for each stage. The amplifier takes advantage of passives like transmission lines and MIM capacitors to realize the input, output and inter-stage matching for the LNAs. The LNA has 12 dB gain at 245 GHz, a 3 dB bandwidth of 26 GHz. It has a supply voltage of 2V and power dissipation of 28mW. The amplifier is intended for the use in ISM band radar systems for consumer application and imaging radar.