基于自适应控制电路实现的宽带高性能频率源  

Broadband high performance frequency synthesizer based on adaptive control circuits

作　　者：杨杰[1] 荣沫 田殷[1] 杨光[1] 任屹灏[1] 宋烨曦[1] 

机构地区：[1]四川九洲电器集团有限责任公司微波技术研究部,四川绵阳621000

出　　处：《太赫兹科学与电子信息学报》2015年第3期473-477,共5页Journal of Terahertz Science and Electronic Information Technology

摘　　要：基于自适应控制技术,在宽带捷变频频率合成器的设计方案中同时引入自动调节滤波电路和带温度预校准功能的自动电平控制电路,有效降低了输出信号杂散,提高了输出信号的功率平坦度,相比传统的利用分段滤波方式实现的宽带频率源,减小了模块体积。文中不仅详细介绍了这2个电路的实现过程,还从易于工程实现的角度出发,着重介绍了一些能有效降低调试工作量的方法。设计所得的频率合成器输出频率1 000 MHz^1 900 MHz,步进2 MHz,在–45℃^+85℃的温度范围内,实现了杂散抑制优于–70 d Bc,输出功率10 d Bm±0.3 d Bm的技术指标。Based on adaptive control technology, both the filter circuit with automatic regulation and automatic level control circuit with temperature pre-calibration are introduced into the design of broadband frequency agility synthesizer simultaneously. With these two circuits, the spur of output signal is reduced, the power flatness of the output signal is improved, and the module size is decreased effectively compared to that of the broadband frequency synthesizer which is implemented with piecewise filter in the traditional way. In this paper, not only the realization process of the two circuits is presented, but also some effective methods to reduce the workload are described from the perspective of engineering. The output frequency of the proposed synthesizer is 1000 MHz to 1900 MHz with the stepping of 2 MHz; its spurious suppression index is better than-70 d Bc and its output power is 10 d Bm ± 0.3 d Bm in the temperature range from-45 ℃ to +85 ℃.

关 键 词：自适应控制 可调滤波器 可变增益放大器 杂散抑制 

分 类 号：TN74[电子电信—电路与系统]