Round robin test on a cavity resonance method to measure complex permittivity of dielectric plates at microwave frequency

Permittivity measurements at millimeter wave frequencies using dielectric rod resonator excited by NRD-guide

“…The temperature coefficient of permittivity (TCε) of the sapphire was calculated to be 86.4 ± 0.8 ppm/ • C, which was in good agreement with a result reported elsewhere. 9 Fig. 4b shows measurements of cordierite ceramics rod (d = 4.803, h = 2.253, α = 0.5).…”

Measurement of Microwave Dielectric Properties and Factors Affecting Them

“…There are various methods which enable measurement of the quality factors of low loss dielectrics [10][11][12][13][14][15][16][17]. However, not all of them take into account practical effects introduced by a real measurement system.…”

“….) g is the guiding wavelength of an infinitely long dielectric rod waveguide and W is the ratio of electric field energy stored outside to inside the rod [17,18]. Thus knowing the value of , the tan can be obtained.…”

Dynamic measurement of permittivity and permeability using ferrite loaded cavity

“…To measure the complex permittivity of low-loss materials, rigorous measuring techniques have been successfully achieved and reported under the stable temperature condition [1]- [3]. It is known that the complex permittivity and permeability of the processing material in the microwave region changes greatly with the composition, the frequency and the temperature [4].…”