LTCC带通滤波器外文翻译.doc

来源：Microwave Conference,2008.EuMc 2008.38th European Bandpass Filters for Ka-Band Satellite Communication Applications Based on LTCC Abstract ----The design of two compact bandpass filters for Ka-band satellite communication applications (downlink 17–22 GHz) is presented. Both filters are designed with additional transmission zeros at finite frequencies in order to improve the out-of-band selectivity. The filters have been realised as low-cost LTCC modules and the scattering parameters have been measured with on-wafer probing. INTRODUCTION Modern multimedia satellites are getting more complex with transponder connectivity requirements, multiple coverage beams, et cetera. Hence, satellite operators increasingly demand flexibility in function, efficient signal routing and signal processing. Therefore, future applications in multimedia satellite communications require innovative components with high RF-performance and, at the same time, with low weight, small size, and high reliability. Advanced integration and packaging technologies, such as low temperature co-fired ceramics (LTCC), combine different design techniques with low cost of fabrication, small size and multiple functionality. LTCC technology provides modular,hybrid-integrated systems with a high degree of miniaturization of microwave payload equipment and, hence, flexibility for adaptation to varying applications. It is one of the reasons,why LTCC became very popular, not only for low frequency designs, but for high frequencies in the microwave and even millimeter-wave ranges as well . This paper focuses on bandpass filters for Ka-band downlink frequencies as important parts of multimedia satellite signal chains, which are based on LTCC multilayer technology and can be combined with other Ka-band microwave LTCC modules presently under development. The two filters presented here display high stop-band isolation for an efficient suppression of the Ka-band uplink frequenc