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An iteratively refined circuital model of CRLH leaky-wave antennas derived from the mushroom structure

: Gomez-Diaz, J.S.; Alvarez-Melcon, A.; Bertuch, T.


Institute of Electrical and Electronics Engineers -IEEE-; IEEE Antennas and Propagation Society; International Union of Radio Science -URSI-; International Union of Radio Science -URSI-, US National Committee:
IEEE International Symposium on Antennas and Propagation and CNC/USNC/URSI Radio Science Meeting, APS/URSI 2010 : July 11-17, 2010, Toronto, Ontario, Canada
New York, NY: IEEE, 2010
ISBN: 978-1-4244-4967-5
ISBN: 978-1-4244-4968-2
4 S.
International Symposium on Antennas and Propagation (APS) <2010, Toronto>
CNC-USNC/URSI Radio Science Meeting <2010, Toronto>
Fraunhofer FHR

Metamaterial leaky-wave antennas (LWAs), which operate in their fundamental guided mode ( = 0), have grown in popularity thanks to their full-space scanning possibilities [1]. Several technologies can be employed to practically implement this type of antennas, such us microstrip, CPW, CPS or mushroom-like periodically loaded waveguides [2]. In order to analyze these structures, equivalent circuit models may be used [1]. These models are able to accurately compute the propagation constant of the structure under analysis, but have some difficulties to obtain the radiation characteristics. Usually, time-consuming full-wave simulations are required for this last step. In this paper, a novel and efficient modal-based iterative circuital model is presented for the accurate analysis of the complex propagation constant related to mushroom-like CRLH LWAs.