Cavity detection in underground pipelines by the mutual impedance change principle of a dipole antenna array.

Athar, Kamal


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Bayrakeri, Sadık; Kuzuoğlu, Mustafa; Department of Electrical and Electronics Engineering (1990)
Broadband Analysis of Multiscale Electromagnetic Problems: Novel Incomplete-Leaf MLFMA for Potential Integral Equations
Khalichi, Bahram; Ergül, Özgür Salih; Takrimi, Manouchehr; Erturk, Vakur B. (2021-12-01)
Recently introduced incomplete tree structures for the magnetic-field integral equation are modified and used in conjunction with the mixed-form multilevel fast multipole algorithm (MLFMA) to employ a novel broadband incomplete-leaf MLFMA (IL-MLFMA) to the solution of potential integral equations (PIEs) for scattering/radiation from multiscale open and closed surfaces. This population-based algorithm deploys a nonuniform clustering that enables to use deep levels safely and, when necessary, without compromi...
Broadband Impedance Transformation by Defected Dielectric on Microstrip Lines
Kaya, Tevfik; Nesimoglu, Tayfun (2018-11-02)
In this work, a different approach to achieve a desired characteristic impedance value on microstrips is presented. In standard microwave circuits using microstrip lines, the dielectric thickness is same and uniform across the whole circuit. In this paper, it is proposed to modify the dielectric thickness to achieve a certain design goal by creating variations in the characteristic impedance of the microstrip transmission line without changing the width of the line. The proposed approach is applied to a mul...
Radiation impedance study of a capacitive micromachined ultrasonic transducer by finite element analysis
Bayram, Barış (2015-08-01)
In this study, radiation impedance of a capacitive micromachined ultrasonic transducer composed of square-shaped membranes arranged in m x m configuration (m = 1 - 5) is investigated using finite element analysis (FEA) of a commercially available software package (ANSYS). Radiation impedance is calculated for immersed membranes operating in conventional and collapse modes. Individual membrane response within the multi-membrane configuration is analyzed, and excited modes and their effects on radiation imped...
Microwave antennas in inhomogeneous isotropic plasma.
Varol, Selçuk H; Department of Physics (1971)
Citation Formats
K. Athar, “Cavity detection in underground pipelines by the mutual impedance change principle of a dipole antenna array.,” Middle East Technical University, 1985.