S-band Mcm Four-digit Shift The Phase Switch Components

This dissertation is on the research of S-band multi-chip module (MCM) 4-bit digital phase shifter and switch section. First, this paper dissertates the importance of digital phase shifter. Digital phase shifter is the necessary key of phased-array radar, which has small volume, light weight, high accuracy test, quick reaction and other advantages. It becomes the mainstream in the present-day development of radar. Manufacturing a phase shifter of high performance, small volume, low cost plays a very important role to the development of phased-array radar. MCM technology is used in the design of phase shifter in this paper. MCM has many superior advantages, high density package, short interconnection. So the performance of the phase shifter is improved, the size is reduced and the cost is cut down, and it is more reliable. The research of this paper is much practical. PIN digital phase shifter is extensively used in all kinds of phased-array radar system in practice. This dissertation discusses the work principle of several digital phase shifters respectively, and describes their characteristics. Based on this, the S-band MCM 4-bit digital phase shifter and switch section is designed by using MCM-D technology, incorporating the guideline and the level of process. Finally, it takes a detailed test to the processed S-band MCM 4-bit digital phase shifter and switch section. The test result is better than expectant guideline: The maximum of the phase error is 3.6??,the insertion loss is better than 6.44dB, the VSWR is within 1.78 in the 3.1GHz??3.4GHz frequency band. The whole volume of the phase shifter is 50mm?á28mm?á6mm, it reduces 30% in volume compared to the phase shifter manufactured in HMIC technology.