DocumentCode :
3852412
Title :
Compact closed-form expressions for the propagation parameters of a finite ground width coplanar transmission waveguide with thick electrodes
Author :
J.A. Ibarra Fuste;M.C. Santos Blanco;E. Rodriguez Rodriguez
Author_Institution :
Department of Signal Theory and Communications, Universitat Politecnica de Catalunya, UPC, Barcelona, Spain
Volume :
6
Issue :
3
fYear :
2012
fDate :
2/21/2012 12:00:00 AM
Firstpage :
269
Lastpage :
275
Abstract :
Compact closed-form mathematical expressions are presented for the effective permittivity, characteristic impedance and attenuation constant of coplanar waveguides with thick electrodes and high-frequency dispersion. Excellent agreements, for a wide range of frequencies, up to 100 GHz and for conductor thicknesses up to 40 m are found with full-wave finite-element results from commercial software (HFSS) in a margin of geometric parameter values and frequencies of interest for the design and optimisation of high-speed electro-optical modulators. The formulae are simple and specially tailored to the narrow gap widths and thick electrodes typical of electro-optical modulator applications. Other approaches to closed-form formulae for CPW parameters are also compared and analysed.
Journal_Title :
IET Microwaves, Antennas & Propagation
Publisher :
iet
ISSN :
1751-8725
Type :
jour
DOI :
10.1049/iet-map.2011.0245
Filename :
6182922
Link To Document :
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