基于FPGA的DDS快速跳頻參考源設(shè)計

打開文本圖片集

中圖分類號：TP772 文獻標識碼：A文章編號：2096-4706（2025）12-0032-05

Design of the DDS Fast Frequency Hopping Reference Source Based on FPGA

WANG Meng12， LIU Qin12， ZHAO Lei1.2 （1.Ceyear TechnologiesCo.，Ltd.，Qingdao，China; 2.Electronic Measuring Instrument Technology Innovation Centerof Shandong Province， Qingdao ，China）

Abstract： This paper proposes a design scheme of DDS fast frequency hopping reference source based on FPGA. A reference source is designed withahigh-stabilityOven-Controled Crystal Oscilltor（OCXO），asmallintegratedPLLchip LMX2572，andahigh-performance DDSchipAD9956as thecore，andtheDDS reference source isused todriveahighfrequencybroadbandfrequencysynthesizerbasedonaPLL.TheprincipleoftheDDSreferencesourceisintroduced，andthe generation of a reference signal with a frequency range of 50～100MHz ，a frequency resolution less than 0.005Hz， a frequency switching time shorter than 6O ns，and a single-sideband phase noise less than zisachieved.TheDDS referencesource designed bythisshemenotonlyhasthe advantages ofhighfrequencyresolution，low phase noise，smallsize， andlowpowerconsumption，butalsocanperfofastfrequencyhoppinginthre modesincudingsingletone，no-dwelllinear sweep，and linear sweep.

Keywords： PLL; FPGA; fast frequency hopping;DDS

0 引言

參考源作為基于PLL的高頻寬帶頻綜的關(guān)鍵部件，廣泛應(yīng)用于矢量信號發(fā)生器、移動通信裝置、雷達、矢量網(wǎng)絡(luò)分析儀、半導體測試機等電子系統(tǒng)H，傳統(tǒng)基于PLL的高頻寬帶頻綜[多采用固定頻率參考源，不僅頻率分辨率較低，相噪也較差。（剩余5282字）