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| Design and Application of Dual Focus Flat Cavity for Electromagnetic Shielding Effectiveness Testing |
| Zhou Xiang, Zhou Zhongyuan, Shen Juntao |
| School of Mechanical Engineering Southeast University Nanjing 211189 China |
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Abstract The dual focus flat cavity (DFFC) is a novel device for shielding effectiveness test. In order to determine the size of dual focus flat cavity (DFFC) in the frequency range 1~18GHz, the resonance characteristics of the elliptical resonator is researched through analytical and numerical methods. It is proved that the height of the cavity which mainly determines the resonant frequencies of TMmr1 and TEmr1 modes is the main factor that affects the transmission coefficient from input port to output port. So, the upper limit of frequency is defined as 80% of the cutoff frequency of TMmr1 mode. Furthermore the newly designed DFFC is manufactured. Finally the Shielding effectiveness test technology involving time domain gate is researched.
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Received: 28 July 2015
Published: 18 August 2016
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2015, Vol. 30 
