Quality factor measurements of air‐cored solenoids at overtone frequencies

Global Love wave overtone measurements

[1] Love wave phase velocities for fundamental and higher modes are difficult to measure because the different modes cannot easily be separated. Following Yoshizawa and Kennett (2002), we generate suites of path specific onedimensional shear wave velocity profiles using the Neighbourhood Algorithm of Sambridge (1999a). From this family of O(10) models both fundamental and higher mode phase velo...

Permittivity Measurements of High Dielectric Constant Films at Microwave Frequencies

We have developed a time-domain reflectometry (TDR) technique to measure the dielectric permittivity of high dielectric constant films. The test specimen consists of a planar capacitor terminating coaxial waveguide. The complex permittivity of the dielectric in the frequency domain is obtained from appropriate analysis of the incident and the reflected voltage waves. In order to improve accurac...

Evaluation of Tumor Necrosis Factor Alpha Polymorphism Frequencies in Endometriosis

Background The pro-inflammatory cytokine, tumor necrosis factor-alpha (TNF-α), is a pathogenic element for a number of disorders. Previous studies have reported that the -1031 T/C and -238 G/A polymorphisms in the promoter region of the TNF-α gene are important factors in reproductive-related disorders. One of the most common gynecological diseases of women during the reproductive years is endo...

Alternatives for PCB Laminates: Dielectric Properties' Measurements at Microwave Frequencies

Frequency domain complex permittivity measurements at microwave frequencies

Overview of frequency domain measurement techniques of the complex permittivity at microwave frequencies is presented. The methods are divided into two categories: resonant and non-resonant ones. In the first category several methods are discussed such as cavity resonator techniques, dielectric resonator techniques, open resonator techniques and resonators for non-destructive testing. The gener...