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Fromentin-Denoziere B.,ONERA | Simon J.,ONERA | Tzoulis A.,Fraunhofer Institute for High Frequency Physics and Radar Techniques | Tzoulis A.,Nokia Inc. | And 7 more authors.
IET Radar, Sonar and Navigation | Year: 2014

Several well-known computational methods, based on various mathematical concepts, are applied to the electromagnetic scattering analysis of a benchmark cavity structure. Specifically, a simplified jet engine inlet configuration is defined, constructed and used as reference, whereas predicted numerical results for the radar cross-section are compared with measurements. The merits and drawbacks of each method are highlighted and quantified, with respect to accuracy, efficiency, resource requirements, reliability and robustness. Conclusions may be exploited in the near future in the construction of reliable classifiers, used in non-cooperative target identification. © The Institution of Engineering and Technology 2015.


Tsitsos S.,Technological And Educational Institute Tei Of Central Macedonia | Anastassiu H.,Technological And Educational Institute Tei Of Central Macedonia | Papatsoris A.,Technological And Educational Institute Tei Of Central Macedonia
2014 22nd Telecommunications Forum, TELFOR 2014 - Proceedings of Papers | Year: 2014

In this work a simple and compact 3-way planar structure which avoids the floating common node for the isolation resistors is presented. The proposed power divider exhibits good return loss and isolation characteristics and additionally provides a wide-band operation, design flexibility and easy implementation. © 2014 IEEE.


Tsitsos S.,Technological and Educational Institute TEI of Central Macedonia | Papatsoris A.,Technological and Educational Institute TEI of Central Macedonia | Anastassiu H.,Technological and Educational Institute TEI of Central Macedonia | Efstathiou D.,Technological and Educational Institute TEI of Central Macedonia | And 2 more authors.
Far East Journal of Electronics and Communications | Year: 2016

In this paper, an enhanced performance dual-band power divider with respect to output return loss and port isolation is presented. The proposed circuit features a transmission line only structure (plus the isolation resistor). In this way the parasitic effects of lumped components are avoided. Additionally, it provides design flexibility and easy implementation by employing realistic characteristic impedance values. The mathematical analysis and the extraction of the design equations are based on the even and odd-mode analysis. A prototype is fabricated on a microstrip substrate and measurements are performed to corroborate the predicted data. Subsequently the circuit is miniaturised using a high dielectric and low loss ceramic material and its performance is tested using a 3D electromagnetic simulator. © 2016 Pushpa Publishing House, Allahabad, India.

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