Microwave Notch Filters for Plasma Diagnostics, Numerical Simulation by Method of Moments with Mode Matching

This work discusses an alternative geometrical optics (GO) technique to synthesize omnidirectional dual-reflector antennas with uniform aperture phase distribution together with an arbitrary main-beam direction for the antenna radiation pattern. Sub- and main reflectors are bodies of revolution generated by shaped curves defined by local conic sections consecutively concatenated. The shaping formulation is derived for configurations like ADC (axis-displaced Cassegrain) and ADE (axis-displaced ellipse) omnidirectional antennas. As case studies, two configurations fed by a TEM coaxial horn are designed and analyzed by a hybrid technique based on mode matching and method of moments in order to validate the GO shaping procedure.

Download Full-text

Modelling and Characterization of Planar Components

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1025-1026.1055 ◽

2014 ◽

Vol 1025-1026 ◽

pp. 1055-1061 ◽

Cited By ~ 1

Author(s):

M. Ourabia

Keyword(s):

Numerical Simulation ◽

Integral Method ◽

Building Blocks ◽

Scattering Matrix ◽

New Method ◽

Contour Integral ◽

Mode Matching ◽

Wide Range ◽

Matching Techniques

An approach for modeling and numerical simulation of planar components using the edge line concept is developed. With this method, we develop an efficient modeling technique for microstrip discontinuities. The structure presents an arbitrary number of ports, each one with different orientation and dimensions. This article presents a hybrid method based on multimode contour integral and mode matching techniques. The process is based on segmentation and dividing the structure into key building blocks. We use the multimode contour integral method to analyze the blocks including irregular shape discontinuities. Finally, the multimode scattering matrix of the whole structure can be found by cascading the blocks. Therefore, the new method is suitable for analysis of a wide range of waveguide problems. Therefore the present approach can be applied easily to the analysis of any multiport junctions and cascade blocks. The accuracy of the method is validated comparing with results for several complex problems found in the literature. CPU times are also included showing the efficiency of the new method proposed.

Download Full-text

Two-Frequency Notch Filters for Sub-THz Plasma Diagnostics

10.1109/irmmw-thz50926.2021.9567148 ◽

2021 ◽

Author(s):

D. Wagner ◽

W. Kasparek ◽

F. Leuterer ◽

F. Monaco ◽

T. Ruess ◽

...

Keyword(s):

Plasma Diagnostics ◽

Notch Filters

Download Full-text

Numerical simulation of spray coalescence in an Eulerian framework: Direct quadrature method of moments and multi-fluid method

Journal of Computational Physics ◽

10.1016/j.jcp.2007.10.028 ◽

2008 ◽

Vol 227 (6) ◽

pp. 3058-3088 ◽

Cited By ~ 92

Author(s):

R.O. Fox ◽

F. Laurent ◽

M. Massot

Keyword(s):

Numerical Simulation ◽

Method Of Moments ◽

Quadrature Method ◽

Quadrature Method Of Moments

Download Full-text

PLASMA-AIDED NANOFABRICATION: "PLASMA-BUILDING BLOCK" APPROACH

International Journal of Nanoscience ◽

10.1142/s0219581x06004607 ◽

2006 ◽

Vol 05 (04n05) ◽

pp. 439-444

Author(s):

KEN OSTRIKOV ◽

SHUYAN XU

Keyword(s):

Numerical Simulation ◽

Gas Phase ◽

Plasma Diagnostics ◽

Building Block ◽

Chemical Structure ◽

Building Blocks ◽

Semiconductor Quantum Dots ◽

Ab Initio Simulation ◽

Nanostructured Surfaces ◽

Block Approach

Unique features and benefits of the plasma-aided nanofabrication are considered by using the "plasma-building block" approach, which is based on plasma diagnostics and nanofilm characterization, cross-referenced by numerical simulation of generation and dynamics of building blocks in the gas phase, their interaction with nanostructured surfaces, and ab initio simulation of chemical structure of relevant nanoassemblies. The examples include carbon nanotip microemitter structures, semiconductor quantum dots and nanowires synthesized in the integrated plasma-aided nanofabrication facility.

Download Full-text