A Shape-Function Grammar Approach for the Synthesis and Modelling of Pixel-Microstrip-Antennas

Classical microstrip antenna models are either an empirically derived mathematical formula or a full-wave numerical solution. The former type is limited to specific simple geometries, is very fast to compute, and to some extent relates dimensional attributes to electromagnetic properties. On the other hand the latter is applicable to any arbitrary geometrical shape and is very accurate, but is computationally intensive and does not give an explanation of how the device works. In this paper a novel approach to modelling microstrip antennas that address this void is proposed. The model makes use of a coupled shape-function grammar to yield an estimate of the electromagnetic properties of arbitrary shaped microstrip antennas and also relates shape attributes to electromagnetic properties. The model is demonstrated on a pixel microstrip antenna structure in analysis and synthesis.

[1]  John R. Koza,et al.  Automated synthesis of a fixed-length loaded symmetric dipole antenna whose gain exceeds that of a commercial antenna and matches the theoretical maximum , 2007, GECCO '07.

[2]  D. A. Lowther,et al.  A paradigm for the non-routine design of electromagnetic devices using a case based reasoning approach , 2000 .

[3]  Tetsuo Tomiyama,et al.  Knowledge Intensive CAD , 1996, IFIP Advances in Information and Communication Technology.

[4]  Martti Mäntylä.  Knowledge-Intensive CAD: Introduction and a Research Agenda , 1996 .

[5]  G. Stiny,et al.  Algorithmic Aesthetics: Computer Models for Criticism and Design in the Arts , 1978 .

[6]  Peter Hall,et al.  Combined wideband and narrowband antennas for Cognitive Radio applications , 2008 .

[7]  V. Rahmat-Samii,et al.  Genetic algorithms in engineering electromagnetics , 1997 .

[8]  G.S. Smith,et al.  A reconfigurable aperture antenna based on switched links between electrically small metallic patches , 2004, IEEE Transactions on Antennas and Propagation.

[9]  Richard C. Booton.  Microwave CAD in the year 2010?A panel discussion , 1999 .

[10]  David B. Davidson.  Genetic Design of Linear Antenna Arrays , 2000 .

[11]  Ashok K. Goel.  Design, Analogy, and Creativity , 1997, IEEE Expert.

[12]  Marc Green,et al.  Knowledge aided design , 1992 .

[13]  Jonathan Cagan,et al.  On the use of shape grammars as expert systems for geometry-based engineering design , 2000, Artificial Intelligence for Engineering Design, Analysis and Manufacturing.

[14]  C. Peixeiro,et al.  Miniaturization of rectangular microstrip patches using genetic algorithms , 2002, IEEE Antennas and Wireless Propagation Letters.

[15]  Luciano Tarricone,et al.  A Proposal for an Electromagnetic Ontology Framework , 2008, 2008 International Conference on Complex, Intelligent and Software Intensive Systems.

[16]  M. Ghilardi,et al.  The Electromagnetic Data Exchange: Much more than a Common Data Format , 2007 .