This letter presents a K-band 4-channel hybrid-packaged phased-array receiver IC for satellite communication (SATCOM). The design utilizes wafer-level chip-scale packaging (WLCSP) technology to integrate four GaAs LNAs and a 4-channel CMOS beamformer into a single package. The GaAs IC features a 2-stage self-biased LNA and a 5th-order band-stop filter, achieving a low cascaded noise figure (NF) and high transmit (TX) rejection. The CMOS beamformer incorporates a novel direct current-mode combination technique based on a parallel switch array attenuator within the passive vector-modulated phase shifter (VMPS), reducing size and phase error. A two-stage digitally controlled current-steering variable gain amplifier (VGA) is optimized to provide a wide gain control range and high resolution. Operating across the SATCOM band of 17.7–21.2 GHz, the proposed phased-array receiver achieves a 360° phase-shifting range with 6-bit resolution and a 15.5-dB gain tuning range with 0.5-dB steps. Measured results show root mean square (rms) phase and amplitude errors of 1.3°–2° and 0.18–0.25 dB, respectively. Each channel demonstrates a state-of-the-art NF of 1.6 dB, a single-path gain of 30 dB, TX rejection of 60 dB, and a TX-band input-referred 1-dB gain compression point (IP1dB) of -10 dBm, while consuming only 46.8 mW of DC power per channel.