Precise evaluation of coaxial to waveguide transitions by means of inverse techniques
Author
Lozano Guerrero, Antonio José; Clemente Fernández, Francisco Javier; Monzó Cabrera, Juan; Pedreño Molina, Juan Luis; Díaz Morcillo, Alejandro BenedictoResearch Group
Grupo de Electromagnetismo y Materia (GEM)Knowledge Area
Teoría de la Señal y las ComunicacionesPublication date
2010-01Publisher
IEEE Microwave Theory and Techniques SocietyBibliographic Citation
LOZANO GUERRERO, Antonio José, CLEMENTE FERNÁNDEZ, Francisco Javier, MONZÓ CABRERA, Juan, PEDREÑO MOLINA, Juan Luis, DÍAZ MORCILLO, Alejandro. Precise evaluation of coaxial to waveguide transitions by means of inverse techniques. IEEE Transactions on Microwave Theory and Techniques, 58 (1): 229 - 235 p. Enero 2010. ISSN 0018-9480Keywords
Transición coaxial de guía de ondaMedida inversa
Calibración de dos niveles
Coaxial to waveguide transitions
Inverse measurement
Two-tier calibration
Algoritmos genéticos (AG)
Genetic Algorithm (GA)
Abstract
In this paper, a new two-tier inverse characterization
technique for coaxial to waveguide transition evaluation is
presented and properly validated. The transition is characterized
by estimating its scattering parameters and a cascade procedure
is employed in order to compare simulations and measurements
during the unterminating procedure. In contrast to other unterminating
methods there are no restrictions concerning the
number and type of standards and two transitions are simultaneously
characterized. Additionally, genetic algorithms and the
gradient descent method are used for error minimization during
the unterminating stage. The accuracy of this two-tier inverse
technique is evaluated as a function of the employed standards and
the obtained results are compared to those provided by different
well-known calibration algorithms. Results show that it is possible
to properly characterize the coaxial to waveguide transition in a
very flexible and accurate way.
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