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The increasing demand for high data rates in wireless communication systems is in-creasing the requirements on the transceiver front-ends, as they are pushed to utilize more and wider bands at higher frequencies. The work in this thesis is focused on receiver front-ends composed of Low Noise Amplifiers (LNAs), Mixers, and Voltage Controlled Oscillators (VCOs) operating at microwave frequencies. Traditionally, microwave electronics has used exclusive and more expensive semi-conductor technologies (III-V materials). However, the rapid development of con-sumer electronics (e.g. video game consoles) the last decade has pushed the silicon CMOS IC technology towards even smaller feature sizes. This has resulted in high speed transistors (high fT and fmax) with low noise figures. However, as the break-down voltages have decreased, a lower supply voltage must be used, which has had a negative impact on linearity and dynamic range. Nonetheless, todays downscaled CMOS technology is a feasible alternative for many microwave and even millimeter wave applications