Satellite high frequency head

The high-frequency head LNB (LOW NOISE BLOCk) is scientifically known as a high-frequency tuner, also known as a downconverter; it is composed of a low-noise amplifier LNA (LOWr Noise Amplifier) ​​and a low-noise downconverter LNC (Low Noise Converter); the LNC is composed of a mixer and a local oscillator. The high-frequency head first amplifies the extremely weak C or Ku band signal (3.4~4.2GHz or 10.7~12.75GHz) transmitted by the satellite through the LNA, and then subtracts the received signal frequency from the local oscillator frequency generated by the local oscillator in the mixer, so that the high-frequency signals of different frequency bands are converted into intermediate frequency signals of a unified frequency band (950~2150MHz) suitable for satellite receiver processing, so as to facilitate the transmission of coaxial cables and the demodulation and operation of satellite equipment.