Ossorio-García, J.; Melgarejo-Lermas, JC.; Boria Esbert, VE.; Guglielmi, M.; Bandler, J. (2018). On the Alignment of Low-Fidelity and High-Fidelity Simulation Spaces for the Design of Microwave Waveguide Filters. IEEE Transactions on Microwave Theory and Techniques. 66(12):5183-5196. https://doi.Abstract-The objective of this paper is to advance the stateof-the-art of Aggressive Space Mapping (ASM) by demonstrating how, for resonant structures, and microwave filters in particular, an ASM based optimization procedure may converge to the desired target performance in just one step. This behavior is first justified in physical terms, using the Electromagnetic (EM) cavity perturbation theory, and is then investigated numerically. Several practical filter design demonstrations are also presented. The paper is concluded with a conceptual definition of Space Alignment in the context of ASM.
The objective of this work is to advance the stateof-the-art in the characterization of the multipactor effect in dielectric materials. The materials studied are the most commonly used dielectrics in space applications, namely, Alumina, Rexolite, Rogers RT5870, Rohacell, Teflon and Ultem 1000. In this context, a new family of coaxial waveguide components, covering the Land S-bands, with a wideband, lowpass response has been designed, and six different prototypes have been specifically optimized and manufactured. The six prototypes have then been used to simulate and measure the multipactor breakdown susceptibility charts for the six dielectric materials investigated. Finally, the simulation results are compared with the results of the measurement campaign indicating good agreement.
Space Mapping (SM) and Aggressive Space Mapping (ASM) techniques are widely used in the synthesis and design of microwave filters. Their popularity stems from the inherent simplicity of the procedures and from their effectiveness. The objective of this paper is to extend the state-of-the-art of these techniques by discussing how they can also be used very effectively to tune microwave filters. In addition to theory, the successful tuning of a six-pole inductive waveguide filter is discussed in details thereby fully validating the proposed SM techniques.
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