What is Bruggeman?
Bruggeman considered a process of embedding two different phases in a sample and based his reasoning on these assumptions: Each phase consists of particles that are small in comparison to the sample size. 3. Each phase is randomly distributed in the sample.
What is tortuosity factor?
Tortuosity is a ratio that characterizes the convoluted pathways of fluid diffusion and electrical conduction through porous media. Tortuosity is also related to the formation factor, which is the ratio of electrical resistivity of a conductive fluid in a porous medium to the electrical resistivity of the fluid itself.
What is effective permittivity?
Effective permittivity and permeability are averaged dielectric and magnetic characteristics of a microinhomogeneous medium. They both were derived in quasi-static approximation when electric field inside a mixture particle may be considered as homogeneous.
How do you calculate tortuosity factor?
Measure with NMR the self-diffusion coefficient of a liquid in the porous layer. Compare with the self-diffusion coefficient in the pure layer and you have the tortuosity.
How is tortuosity factor calculated?
This effect is captured in a term called the tortuosity factor, , which is defined in (1) D eff = D ε τ where is the volume fraction of the conductive phase; is the intrinsic diffusivity of the conductive phase; and is the effective diffusivity through a porous volume where the second phase is insulating.
How do you calculate effective permittivity?
The effective permittivity is simply the effective refractive index squared, neff^2. Hope this helps!
What is permittivity in transmission line?
The effective permittivity characterizes a transmission line as one with the homogenous dielectric medium of permittivity 𝜀e. The effective permittivity of a transmission line is one of the main parameters in microwave and RF circuits. The phase velocity of an EM field is dependent on the permittivity of the medium.
What is geometric tortuosity?
Geometric tortuosity is the ratio between the shortest pathway in the medium to the distance between the inlet and outlet plane. For all synthetic samples, the more complex the pore structure, the greater the tortuosity.
How do you calculate effective dielectric?
The effective dielectric constant is a seen to be a function of the ratio of the width to the height of a microstrip line (W/H), as well as the dielectric constant of the substrate material.
What is the formula for effective dielectric constant of microstrip line?
Explanation: The effective dielectric constant of a microstrip line is given by (∈r + 1)/2 + (∈r-1)/2 * 1/ (√1+12d/w). Substituting the given values of relative permittivity, effective width, and thickness, the effective dielectric constant is 1.97.