Measurements of Dielectric Properties at Ka-Band Using a Fabry-Perot Hemispherical Open Resonator |
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Authors: | J.J. Choi W.B. Seo |
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Affiliation: | 1.High Power Microwave Engineering Laboratory,Kwangwoon University, School of Electronics Engineering,Seoul,Korea |
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Abstract: | A Fabry-Perot hemispherical open resonator is designed and constructed in order to measure dielectric properties of BeO in the Ka-band (26 – 40 GHz) frequency range. Based on both analytic calculations and simulations by a 3-D finite element electromagnetic code, HFSS, the hemispherical open resonator is designed to excite a TEM0,0,17 mode at 28 GHz. The TEM0,0,17 mode is experimentally identified by a field perturbation technique. Dielectric measurements are made by both frequency variation and length variation methods. Measurements show that permittivity and loss tangent of BeO are 6.69 and 6.5 × 10?4 - 7.2× 10?4, respectively, in the frequency range of 26 – 34 GHz. |
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