CEM methods in R.F and microwave engineering in the context of parameters that influence the outcome of modeling

This paper offers an effective, accurate, and simple method for permittivity and permeability determination of an LTCC (low temperature cofired ceramic) ferrite sample. The presented research can be of importance in the fields of ferrite component design and application, as well as for RF and microwave engineering. The characterization sample is a stack of LTCC tapes forming a toroid. Commercially available ferrite tape ESL 40012 was used and standard LTCC processing was applied for the sample fabrication. For the first time, the electrical properties of a ferrite toroid sample of ESL 40012 LTCC ferrite tape is presented at various frequencies. The electrical properties of LTCC ferrite materials, permittivity and specific resistivity, are shown in a frequency range from 10 kHz to 1 MHz using the capacitive method. The hysteresis properties of this material are also determined. B-H hysteresis loops were measured applying a maximum excitation of 2 kA/m and frequencies of 50 Hz, 500 Hz, and 1000 Hz. Permeability is determined in the frequency range from 10 kHz to 1 GHz and a characterization procedure is divided in two segments, for low and high frequencies. Low frequency measurements (from 10 kHz to 1 MHz) are performed using LCZ meter and discrete turns of wire, while a short coaxial sample holder and vector network analyzer were used for the higher frequency range (from 300 kHz to 1 GHz). In addition, another important factor required for the practical design of devices is presented, the temperature variation of the permeability dispersion parameters.

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Appendix B: Microwave Engineering Appendix

The RF and Microwave Handbook - 3 Volume Set ◽

10.1201/9781315217703-15 ◽

2018 ◽

pp. 721-758

Keyword(s):

Microwave Engineering

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Microwave Engineering Appendix

Electrical Engineering Handbook - RF and Microwave Passive and Active Technologies ◽

10.1201/9781420006728.axb ◽

2007 ◽

pp. A2-1-A2-38

Author(s):

John Wendler

Keyword(s):

Microwave Engineering

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Microwave engineering filter synthesis technique for coupled ridge resonator filters

Optics Express ◽

10.1364/oe.27.034370 ◽

2019 ◽

Vol 27 (23) ◽

pp. 34370 ◽

Cited By ~ 5

Author(s):

Thach G. Nguyen ◽

Kiplimo Yego ◽

Guanghui Ren ◽

Andreas Boes ◽

Arnan Mitchell

Keyword(s):

Synthesis Technique ◽

Filter Synthesis ◽

Microwave Engineering ◽

Resonator Filters

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International Workshop on Finite Elements for Microwave Engineering

10.36253/978-88-6655-968-9 ◽

2016 ◽

Keyword(s):

Finite Element ◽

Finite Elements ◽

Dominant Role ◽

Piecewise Linear ◽

International Workshop ◽

American Mathematical Society ◽

Element Formulation ◽

Microwave Engineering ◽

History Of ◽

Element Activity

When Courant prepared the text of his 1942 address to the American Mathematical Society for publication, he added a two-page Appendix to illustrate how the variational methods first described by Lord Rayleigh could be put to wider use in potential theory. Choosing piecewise-linear approximants on a set of triangles which he called elements, he dashed off a couple of two-dimensional examples and the finite element method was born. … Finite element activity in electrical engineering began in earnest about 1968-1969. A paper on waveguide analysis was published in Alta Frequenza in early 1969, giving the details of a finite element formulation of the classical hollow waveguide problem. It was followed by a rapid succession of papers on magnetic fields in saturable materials, dielectric loaded waveguides, and other well-known boundary value problems of electromagnetics. … In the decade of the eighties, finite element methods spread quickly. In several technical areas, they assumed a dominant role in field problems. P.P. Silvester, San Miniato (PI), Italy, 1992 Early in the nineties the International Workshop on Finite Elements for Microwave Engineering started. This volume contains the history of the Workshop and the Proceedings of the 13th edition, Florence (Italy), 2016 . The 14th Workshop will be in Cartagena (Colombia), 2018.

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