Numerical Modeling Of Generalized Millimeter-Wave Transmission Media With Finite Element And Transmission Line Matrix Methods

Eswarappa G. Costache; W. J. R. Hoefer

doi:10.1117/12.978425

18 November 1989 Numerical Modeling Of Generalized Millimeter-Wave Transmission Media With Finite Element And Transmission Line Matrix Methods

Eswarappa G. Costache, W. J. R. Hoefer

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Proceedings Volume 1039, 13th Intl Conf on Infrared and Millimeter Waves; (1989) https://doi.org/10.1117/12.978425
Event: 13th International Conference on Infrared and Millimeter Waves, 1987, Honolulu, HI, United States

Abstract

In this paper, a general finite element method as well as a graded-mesh TLM procedure for determining the dispersion characteristics, field distribution, pseudo-impedance and losses of generalized millimeter-wave transmission media are described. These methods cover arbitrary cross-sections and account for realistic features (finite metallization thickness, substrate mounting grooves etc.) that are often neglected in theoretical analysis. Dispersion characteristics and characteristic impedances obtained for dielectrically loaded ridged waveguides compare well with the available data. Conductor and dielectric losses are also computed for these structures. A modified finline structure called " ridged fin-line" is also analysed. The main advantages of this structure are its large monomode bandwidth and reduced dispersion. The cutoff frequencies of bilateral finlines in circular waveguides are also computed.

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Eswarappa G. Costache and W. J. R. Hoefer "Numerical Modeling Of Generalized Millimeter-Wave Transmission Media With Finite Element And Transmission Line Matrix Methods", Proc. SPIE 1039, 13th Intl Conf on Infrared and Millimeter Waves, (18 November 1989); https://doi.org/10.1117/12.978425

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KEYWORDS

Waveguides

Dielectrics

Dispersion

Finite element methods

Wave propagation

Radio propagation

Computer aided design

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