부산대학교 도서관

This paper describes about re-engineering, redesign & development of a Quad channel single stage down converter. This downconverter module is a part of ERP unit that forms a major entity for Track Radar operating at Ka band. Quad channel IF receiver is second stage of down conversion. The first prototype was made meeting all necessary specification. But had multiple sub-assemblies and interconnection, resulting in complex & time-consuming assembly & manufacturing process. Also due to multiple interconnects reliability of module was at stake during extreme operating conditions. Thus, version two design was taken up to address these issues. The major challenges were to meet key specifications like Isolation between channels, Gain & phase tracking between channels and Noise figure over temperature (-25°C to +55°C) with minimum sub-assemblies & interconnects. This paper discusses first prototype design, its drawbacks, then the second prototype to meet short comes of first prototype and a comparison of both. This paper gives insight about how to improve DFX i.e., design for X (X- Manufacturability, Assembly, Reliability).