Design and Application of Ku-band Broadband LNA in Satellite Payload

In this essay, a Ku-band broadband low noise amplifier (LNA) for satellite payload was introduced. On the premise of ensuring performance, the micro-assembly design and process are adopted to significantly reduce the product size. This essay shows the design idea and key points, such as modular packaging, gain compensation and balanced amplification. With the operation temperature from -30°C to 45°C, in over 600MHz bandwidth, the linear gain of LNA is greater than 41dB. Meanwhile, the noise Figure is less than 1.9 and the full band flatness is less than 0.4db (within required bandwidth). The dimensions of LNA are 187mm × 90 mm × 21.5 mm and the weight is 800g. This design ensures that LNA can pass the aerospace-grade acceptance standard tests.