Ltcc Integrated Nc Yig Oscillator Technology Research

YIG （Yttrium Iron Garnet）single crystal tuning oscillators are one kinds ofmicrowave ferrite devices based on ferromagnetic resonance theory, which becomethe essential devices for radar, electronic countermeasure and High-grade precisioninstruments due to its high performance such as broad bandwidth, high linearity, highQ,adjustable, and low phase noise.Traditionally, YIG oscillator not only fabricatiedone by one with manually work but also has big size. In order to solve the bottleneckproblem of batch producing and miniaturization, the work on embedding YIG sphereinto LTCC circuit board was researched employing LTCC integrating process and theideal of combination of YIG oscillators and LTCC process was proposed.In this dissertation, the equivalent circuit model for high-Q YIG sphere harmonicoscillator was builded. Resonance coupling structure, oscillating circuit, low noisedesign and magnetic circuit structure etc. were optimized by simulation software. TheLTCC process designing according to the optimized parameters was performed and theLTCC integrated YIG resonantor was prepared.Coordinating the fabricating of drivecircuit, software developing and compensation, the LTCC ingtegrated numericalcontrol YIG oscillator samples were manufactured. The primary performance of thesamples was obtained and the experimental results agree with designing.The feasibilityof the research programme was verified experimentally.