Millimeter-wave (mm-wave) cellular and satellite communication (SATCOM) technologies rely on low-noise frequency synthesis and phased-array receiver systems to ensure high-quality modulated waveforms and high data rates. The contribution of this dissertation is on the analysis, design, and implementation of three important circuit blocks in such systems: a frequency divider, a voltage-controlled oscillator (VCO), and a receive beamformer. The work on the frequency divider emphasizes a high operating frequency and low power consumption. The VCO project emphasizes the analysis of the transformer tank by constructing and studying a detailed transformer tank model. Design considerations for a high quality factor and low phase noise are also discussed, and a low-jitter phase-locked loop (PLL) using the VCO is demonstrated. The efforts in the receive beamformer focus on wideband and dual-beam operation with low noise figure (NF). A state-of-the-art NF of 2.0–2.4 dB is achieved at C, X, Ku, and Ka bands. A 16-element dual-beam receive phased array based on the beamformer chip is designed and measured at 5–26 GHz demonstrating wideband performance.