【作者】 王昊；

【导师】 陈殿仁；

【作者基本信息】 长春理工大学 ， 通信与信息系统， 2008， 硕士

【摘要】 在无线通信领域中高性能频率源是通信设备、雷达、电子侦察和对抗设备的核心部件。锁相环频率合成器是一种相位锁定装置,是一种频率稳定度较高的离散间隔型频率信号发生器。随着数字控制技术的快速发展,由DSP控制的锁相环路频率合成技术在信号产生上越来越显示出其优势。它有体积小、功耗低、频率变化速度快、信号指标高的特点。本文应用锁相技术来实现跳频源设计,采用ADF4113复合D/A转换器MAX538的模式,主要介绍了以下几个部分:首先,介绍了锁相环的基本应用及工作原理;其次,介绍8GHz跳频源的两种设计方案;第三,对设计的各个部分进行分步调试;最后,对整个系统进行技术指标的测试,其测试结果为输出频率基本满足7.8GHz至8.64GHz左右的可调。采用ADF4113与D/A转换器MAX538相结合的模式,扩大了锁相环路输出频率的可调范围,对于实现扩频通信中的跳频源设计有较大价值。更多还原

【Abstract】 In the field of wireless correspondence, high performance of frequency source is the core part of communication facility, radar, electronic reconnaissance and resistance equipment. The phase-locked loop frequency synthesizer is a kind of phase lock installment and it is a kind of separate gap frequency code generator with high stability frequency. Along with the development of numerical control technology, the phase-locked circuit frequency synthesis technology controlled by DPS demonstrates its superiority in producing signal. It has the characteristics like small volume, low power loss, quick frequency shift and elevated signal indication.This paper realizes the design of frequency-hopping source by applying the phase-lock technique, and uses the pattern of ADF4113 compound D/A switch MAX538. It mainly introduced the following four parts. First, it introduced the basic application of the phase-locked loop and its work principle. Next, it introduced two design of the 8GHz frequency-hopping source. Third, it debugs each part of the design step by step. Finally, it tests the technical specification of the overall system, and the test result show that the output frequency satisfies basically to caper change from7.8GHz to 8.64GHz.Using the pattern of ADF4113 and D/A switch MAX538, PLL frequency output expanded the scope of the regulation. And it also means a lot to realize the design of frequency-hopping source in the wide frequency.更多还原