A Ka-band CMOS 1-channel beamforming front-end IC for RF inter-satellite link system is presented. In particular, variable gain phase shifters (VGPS) and PA linearizer are integrated. The VGPS has an orthogonal phase and gain control function, which reduces chip size and power consumption. The PA linearizer reduces both AM-AM and AM-PM distortions of the PA, which improves linear output power. The 1-channel beamforming front-end IC has 6-bit phase and 6-bit gain control resolutions with TX OP1dB of 18.5 dBm.