【摘要】 介绍了一种新型的变频方案,采用单本振源即可实现二次变频,还能保留传统二次变频方案的优点,简化了本振源的实现,有利于小型化和集成化。对该新方案进行了理论分析,进而对这种改进二次变频方案提出了采用的频率配置关系和中频滤波器参数设计准则,并结合一个工程实例完成了相关设计。文中所讨论的方案也同样适用于其它频段。更多还原

【Abstract】 This paper introduces a novel scheme of frequency conversion,using single local oscillator to achieve double-conversion.It simplifies the realization of local oscillator and at the same time retains the advantages of traditional double-conversion system.This scheme is favorable in system miniaturization and integration.Based on the theory analysis of this scheme and an engineering example,formula of frequency planning and design rules of intermediate frequency filter′s parameter are proposed.The method discussed in this paper is also applicable in other frequency bands.更多还原