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发明名称
一种用于多频多模手机的射频模块
摘要
多频多模射频模块是为了满足多种不同频段和模式手机设计的需求。采用射频直接调制发射、超外差中频解调接收的系统方案,以芯片的PD(POWERDOWN)功能,结合SPMT开关实现多频多模的切换,降低功耗;同时,各个频段的不同模式共用同一个直接射频正交调制器、可变增益放大器(VGA)和正交解调器,以降低成本。
申请公布号
CN1181700C
申请公布日期
2004.12.22
申请号
CN01131493.1
申请日期
2001.09.12
申请人
信息产业部电信传输研究所;东南大学
发明人
朱晓维;刘进;赵嘉宁;洪伟;田玲;周健义;蒋伟
分类号
H04Q7/32
主分类号
H04Q7/32
代理机构
代理人
主权项
1.一种用于多频多模手机的射频模块,其特征在于由直接射频正交调制器、可变增益放大器(VGA)、功率放大器、收发双工器及天线、接收前端、中频SAW滤波器、正交解调器,以及锁相频率综合源和SPMT开关组成,其中射频正交调制器的输出端直接与可变增益放大器(VGA)连接;锁相频率综合源直接与正交调制器、正交解调器及接收前端连接。
地址
100045北京市月坛南街11号
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