Research On Ku/K-Band Low Noise Amplifier Based On SISL Platform

In recent years,radio technology has been widely used in fields such as mobile phone terminals,Bluetooth technology,wireless local area networks,electronic radio frequency tags,global positioning systems,satellite communication systems,and automotive collision avoidance radars.The low noise amplifier(LNA)is the core module of the receiver front-end in the wireless communication system,which determines the sensitivity and dynamic range of the entire receiver system.At present,the LNA in the Ku/K-band is usually realized by integrated circuit technology such as silicon-based and Ⅲ-Ⅴ compounds,and printed circuit board(PCB)technology is rarely used,which is mainly limited by the influence of the dielectric substrate and the packaging form.This dissertation researches Ku/K-band board-level LNA using Substrate Integrated Suspended Line(SISL)technology based on the current situation.The main content of this dissertation includes:(1)A board-level Ku-band LNA for satellite communication applications based on SISL is researched and designed.The LNA adopts transmission line matching and a discrete passive device feed network.Based on the low loss and self-packaged characteristics of the SISL platform,it has a small signal gain of more than 30 dB and a minimum noise figure of 0.7 dB in the Ku-band.(2)A board-level K-band LNA for automotive radar applications based on SISL is researched and designed.With the minimal loss,a simplified,purely distributed parameter matching network is utilized for simultaneous noise and impedance matching.Different from standard chip-level circuits,this design uses a multi-layer PCB process of FR4 material,which has the advantages of low cost and self-packaging.According to the measurement,the proposed LNA achieves a high-power gain of 27.7 dB and an ultra-low noise figure of 1.0 dB in the K-band.