The Design of 8025-8400 MHz Low-Noise Amplifier (LNA) for Satellite Communication System

Developments in satellite communication systems increase the interest in Low Noise Amplifier-LNA and its subsystems. Lownoise amplifier subsystems are used to amplify low-power signals and keep the noise at a minimum level in satellite communications. In this study, a two-layer low-noise amplifier design is proposed for the frequency band range of 8025-8400 MHz. RT5880 substrate and CE3512K2 transistor are used as materials in the design. Matching circuits are realized with microstrip lines and packaged Radio Frequency-RF materials. According to the measurement results, the input (S11) and output (S22) reflection losses in the operating frequency band were obtained better than -14 dB and -15 dB, respectively. The measured gain value was obtained better than 21.9 dB. In addition, in the case that the 2-layer LNA circuit consumes 40 mW of power, the noise figure value is obtained lower than 1.1 dB in the operating band and the output power at the 1-dB suppression point is achieved at +14.6 dBm.