Research On Wideband Up And Down Frequency Conversion Component Based On SIP Technology

Broadband up-down frequency conversion component for radar systems is located between the signal reception frontend and the signal processing unit,and it converts highfrequency signals into intermediate-frequency signals.Due to the diverse performance requirements of different systems,the specific composition and circuitry of the frequency conversion component may vary.Typically,it includes frequency conversion circuits,switch filter banks,and intermediate frequency(IF)links.With the trend towards miniaturization and high reliability in radar systems,frequency conversion components are increasingly being designed to be modular,compact,and highly reliable.Based on System in Package(SiP)technology and High-Temperature Co-Fired Ceramic(HTCC)technology,this thesis designs a broadband up-down frequency conversion component with an input frequency range of 0.8-18 GHz,which uses two frequency mixers to convert the frequency to 1.8 GHz.This thesis conducts research on broadband receivers and selects devices based on project technical specifications to design the link.The link specifications are calculated to meet the project requirements.Based on the system function,the component is divided into two SiP modules to achieve two frequency mixers.Research on SiP and HTCC technology is conducted to familiarize with the SiP module design process and HTCC substrate design rules.Then,electromagnetic simulation optimization is performed on the RF transition transmission lines based on HTCC to ensure that the transition transmission lines designed in the SiP module have good transmission characteristics.Thermal design analysis is also performed on the two SiP modules of the component,and the highest chip temperature during module operation is determined to be 60.2 ℃,which is lower than the maximum operating temperature of the chip,indicating that the thermal design of the system is reliable.Finally,the component is tested and the system gain is determined to be 48.6-51.5d B,the noise coefficient is 5.7-8.1 d B,the image rejection is greater than 62 d Bc,the spurious suppression is greater than 60 d Bc,and the output P-1 is 9.7 d Bm.The technical specifications of the component meet the requirements of the technical agreement.