Terahertz Spectrum Of High Permittivity Materials And Noise Suppression Materials

With the development of electronic technology, high performance computer andelectronic equipment require higher electronic material characteristics. Among all theparameters, permittivity is one of the most important indices of electronic materials. Highpermittivity can reduce the space of electronic equipment and achieve more multifunctionaland higher speed, which has a profound impact on the development of electronic industry.The development of the computer’s performance, especially that of working frequency andintegration level, brings electromagnetic compatibility problem and puts forward higherrequirements on the anti jamming and noise suppression ability of electronic equipment.In this thesis, we have manufactured high permittivity material in sol gel method andnoise suppression material through mixing the phosphided carbonyl iron powder invulcanized rubber. The traditional analytical methods to these materials are differentialthermal analysis, TGA, XRD and SEM, but few studies on0.1THz to3THz. Terahertztechnology has been widely used in many areas for its low energy, good transient and highSNR. In this thesis we have detected high permittivity material and noise suppression ofdifferent thickness and constituent through terahertz time domain spectroscopy technology,we have got time domain of different materials and frequency domain through FTT. Afterprocessing the data, we have got absorption spectrum, transmission spectrum and reflectionspectrum. And we have comparatively analyzed different thickness and constituent of itsabsorption spectrum, transmission spectrum and reflection spectrum. We got dielectricconstant curve from100Hz to200kHz through traditional method. After the data processingwe have got dielectric constant curve from0.1THz to3THz through terahertz time domainspectroscopy technology and juxtaposed it with the low frequency band. The results showthat the prepared high permittivity material has high permittivity at low frequency band andthe permittivity drops with the improvement of frequency. The permittivity remains stable atTHZ band. The noise suppression material has a high absorption rate, lower transmissionrate and reflection rate.