随着射频产品的小型化,特别是射频SIP(systems in package)产品的逐渐应用,基于多层PCB的基板射频组件等射频集成产品的应用越来越多,基板内射频信号传输性能的研究也越来越重要。通过对基于多层PCB的基板射频传输性能进行仿真测试,验证...随着射频产品的小型化,特别是射频SIP(systems in package)产品的逐渐应用,基于多层PCB的基板射频组件等射频集成产品的应用越来越多,基板内射频信号传输性能的研究也越来越重要。通过对基于多层PCB的基板射频传输性能进行仿真测试,验证了DC-40 GHz范围内射频基板传输性能,针对射频传输中极为关注的传输损耗问题,通过改进介质厚度或者铜箔材料实现基板射频传输损耗的优化,单位长度传输线射频传输损耗减小20%以上。同时针对星载等应用环境,通过深层充放电、总剂量试验,表明多层PCB的基板满足星载等航天应用。展开更多
The paper has introduced characteristics and study status of new rural construction, illustrated the connotation of leapfrog development of new rural construction, and considered that new rural construction is an impo...The paper has introduced characteristics and study status of new rural construction, illustrated the connotation of leapfrog development of new rural construction, and considered that new rural construction is an important measure to solve "three rural" problems. How to conduct new rural construction in urbanization is a critical issue in social and economic development in China. Based on the favorable condition and development mode of current new rural construction, by taking new rural construction of Haiyang Village in Jiangxia District of Wuhan City for example, it has analyzed the leapfrog development in terms of traditional agriculture, villagers' life quality and rural concept, and the inheritance in terms of culture and rural appearance, so as to give enlightenments to new rural construction in the future.展开更多
文摘随着射频产品的小型化,特别是射频SIP(systems in package)产品的逐渐应用,基于多层PCB的基板射频组件等射频集成产品的应用越来越多,基板内射频信号传输性能的研究也越来越重要。通过对基于多层PCB的基板射频传输性能进行仿真测试,验证了DC-40 GHz范围内射频基板传输性能,针对射频传输中极为关注的传输损耗问题,通过改进介质厚度或者铜箔材料实现基板射频传输损耗的优化,单位长度传输线射频传输损耗减小20%以上。同时针对星载等应用环境,通过深层充放电、总剂量试验,表明多层PCB的基板满足星载等航天应用。
文摘The paper has introduced characteristics and study status of new rural construction, illustrated the connotation of leapfrog development of new rural construction, and considered that new rural construction is an important measure to solve "three rural" problems. How to conduct new rural construction in urbanization is a critical issue in social and economic development in China. Based on the favorable condition and development mode of current new rural construction, by taking new rural construction of Haiyang Village in Jiangxia District of Wuhan City for example, it has analyzed the leapfrog development in terms of traditional agriculture, villagers' life quality and rural concept, and the inheritance in terms of culture and rural appearance, so as to give enlightenments to new rural construction in the future.
