RF and microwave applications represent one of the fastest-growing segments of
the high performance electronics market, where ongoing innovation is critical.
Manufacturers compete intensively to meet market needs with reduced cost,
size, weight and many other performance criteria demands. Under this scenario,
transmission lines based on metamaterial concepts can be considered a very
interesting alternative to the conventional transmission lines. They are more
compact (compatible with planar manufacturing processes) and present higher
degrees of design flexibility. Furthermore, metamaterial transmission lines can
also provide many other unique properties not achievable with ordinary
transmission lines, such as dispersion or impedance engineering. Nevertheless,
the impact in the industry is still not relevant, mostly due to the complexity of
the related synthesis and design procedures. These procedures are mainly based
on the engineer’s experience, with the help of costly full-wave electromagnetic
(EM) simulators and parameter extraction methods.
The aim of this thesis is to contribute to simplify and speed up the synthesis
and design procedures of artificial transmission lines. In particular, the lines
obtained by periodically loading a conventional transmission line with
electrically small resonators, such as split ring resonators (SSRs) or its
complementary particle (CSRR). The design procedure is automated by using
Space Mapping techniques. In contrast to other alternative methods, real
synthesis is found from the circuit schematic (that provides a given target
response) and without need of human intervention. Some efforts to make the
method practical and useful have been carried out. Given a certain target
response, it is determined whether it can be physically implemented with a
chosen technology, and hence proceeding next to find the synthesis, or not. For
this purpose, a two-step Aggressive Space Mapping approach is successfully
proposed.
In contrast to other methods, the real synthesis is found from certain target
circuit values (corresponding to the equivalent circuit model that characterizes
the structure to be synthesized). Different efforts have been carried out in order
to implement a useful and practical method. Some of them were focused to determine if, given certain circuit parameters (which determine the target
response) and certain given technology specifications (permittivity and height of
the substrate, technology limits), that response is physically realizable
(convergence region). This technique was successfully formulated and it is
known as “Two-Step Aggressive Space Mapping Approach”.
In this work, the latest improvements made till date, from the synthesis of
basic unit cells until different applications and kinds of metamaterial-based
circuits, are presented. The results are promising and prove the validity of the
method, as well as its potential application to other basic cells and more complex
designs. The general knowledge gained from these cases of study can be
considered a good base for a coming implementation in commercial software
tools, which can help to improve its competitiveness in markets, and also
contribute to a more general use of this technology. / Rodríguez Pérez, AM. (2014). Synthesis of Planar Microwave Circuits based on Metamaterial Concepts through Aggressive Space Mapping [Tesis doctoral]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/48465
| Identifer | oai:union.ndltd.org:upv.es/oai:riunet.upv.es:10251/48465 |
| Date | 30 March 2015 |
| Creators | Rodríguez Pérez, Ana María |
| Contributors | Boria Esbert, Vicente Enrique, Universitat Politècnica de València. Departamento de Comunicaciones - Departament de Comunicacions |
| Publisher | Universitat Politècnica de València |
| Source Sets | Universitat Politècnica de València |
| Language | English |
| Detected Language | English |
| Type | info:eu-repo/semantics/doctoralThesis, info:eu-repo/semantics/acceptedVersion |
| Rights | http://rightsstatements.org/vocab/InC/1.0/, info:eu-repo/semantics/openAccess |
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