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Author

  • Constantinos Valagiannopoulos
2015

Controlling Reflection and Transmission with a Single Layer

Valagiannopoulos, C. A., Apr 1 2015, In : IEEE Antennas and Propagation Magazine. 57, 2, p. 318-323 6 p., 7089226.

Research output: Contribution to journalArticle

Electromagnetic energy sink

Valagiannopoulos, C. A., Vehmas, J., Simovski, C. R., Tretyakov, S. A. & Maslovski, S. I., Dec 1 2015, In : Physical Review B - Condensed Matter and Materials Physics. 92, 24, 245402.

Research output: Contribution to journalArticle

27 Citations (Scopus)

Excitation of a grounded lossy dielectric slab by an external complex source point beam

Tsitsas, N. L. & Valagiannopoulos, C. A., Aug 27 2015, 2015 9th European Conference on Antennas and Propagation, EuCAP 2015. Institute of Electrical and Electronics Engineers Inc., 7228895. (2015 9th European Conference on Antennas and Propagation, EuCAP 2015).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Perfect magnetic mirror and simple perfect absorber in the visible spectrum

Valagiannopoulos, C. A., Tukiainen, A., Aho, T., Niemi, T., Guina, M., Tretyakov, S. A. & Simovski, C. R., Mar 11 2015, In : Physical Review B - Condensed Matter and Materials Physics. 91, 11, 115305.

Research output: Contribution to journalArticle

35 Citations (Scopus)

Pockels cover for switchable control of the reflection from a grounded, isotropic, lossy dielectric slab

Valagiannopoulos, C. A., Tsitsas, N. L., Lakhtakia, A. & Burger, A., Feb 28 2015, In : Journal of Applied Physics. 117, 8, 083105.

Research output: Contribution to journalArticle

3 Citations (Scopus)

PT-symmetric metamaterial systems for aberration-free imaging and wave manipulation

Monticone, F., Valagiannopoulos, C., Savoia, S., Fleury, R. & Alu, A., Nov 30 2015, 2015 9th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics, METAMATERIALS 2015. Institute of Electrical and Electronics Engineers Inc., p. 223-225 3 p. 7342581

Research output: Chapter in Book/Report/Conference proceedingConference contribution

The Role of Reactive Energy in the Radiation by a Dipole Antenna

Valagiannopoulos, C. A. & Alu, A., Aug 1 2015, In : IEEE Transactions on Antennas and Propagation. 63, 8, p. 3736-3741 6 p., 7111231.

Research output: Contribution to journalArticle

6 Citations (Scopus)
2014

Demand curves and operator strategies in the finnish mobile broadband market

Katsigiannis, M. & Valagiannopoulos, C., Jan 1 2014, In : International Journal of Business Data Communications and Networking. 10, 1, p. 30-46 17 p.

Research output: Contribution to journalArticle

5 Citations (Scopus)

Emulating hyperbolic-media properties with conventional structures

Valagiannopoulos, C. A. & Tretyakov, S. A., Jun 2014, In : New Journal of Physics. 16, 063004.

Research output: Contribution to journalArticle

8 Citations (Scopus)

Hiding a bump on a PEC plane by using an isotropic lossless dielectric layer

Valagiannopoulos, C. A., Tsitsas, N. L. & Sihvola, A. H., Nov 1 2014, In : IEEE Transactions on Antennas and Propagation. 62, 11, p. 5706-5714 9 p., 6895287.

Research output: Contribution to journalArticle

8 Citations (Scopus)

How nonreciprocal is an effective permittivity matrix?

Valagiannopoulos, C. A., Sep 2014, In : Microwave and Optical Technology Letters. 56, 9, p. 2018-2021 4 p.

Research output: Contribution to journalArticle

5 Citations (Scopus)

Hyperbolic-metamaterial antennas for broadband enhancement of dipole emission to free space

Valagiannopoulos, C. A., Mirmoosa, M. S., Nefedov, I. S., Tretyakov, S. A. & Simovski, C. R., Jan 1 2014, In : Journal of Applied Physics. 116, 16, 163106.

Research output: Contribution to journalArticle

19 Citations (Scopus)

Mimicking the perfect electromagnetic conducting scattering mechanisms with suitable bi-isotropic media

Valagiannopoulos, C. A. & Sihvola, A. H., Nov 17 2014, In : Electromagnetics. 34, 8, p. 593-607 15 p.

Research output: Contribution to journalArticle

4 Citations (Scopus)

On the minimal scattering response of PEC cylinders in a dielectric cloak

Valagiannopoulos, C. A., Alitalo, P. & Tretyakov, S. A., Mar 27 2014, In : IEEE Antennas and Wireless Propagation Letters. 13, p. 403-406 4 p., 6746011.

Research output: Contribution to journalArticle

11 Citations (Scopus)

Scattering and absorption of a complex source point beam by a grounded lossy dielectric slab with a superstrate

Tsitsas, N. L., Valagiannopoulos, C. A. & Nosich, A. I., Oct 1 2014, In : Journal of Optics (United Kingdom). 16, 10, 105712.

Research output: Contribution to journalArticle

10 Citations (Scopus)

Symmetric absorbers realized as gratings of PEC cylinders covered by ordinary dielectrics

Valagiannopoulos, C. A. & Tretyakov, S. A., Oct 1 2014, In : IEEE Transactions on Antennas and Propagation. 62, 10, p. 5089-5098 10 p., 2340891.

Research output: Contribution to journalArticle

15 Citations (Scopus)
2013

A grating from coated PEC cylinders functioning as an electromagnetic absorber

Valagiannopoulos, C. A. & Tretyakov, S. A., Dec 1 2013, 2013 IEEE Antennas and Propagation Society International Symposium, APSURSI 2013 - Proceedings. p. 1986-1987 2 p. 6711651. (IEEE Antennas and Propagation Society, AP-S International Symposium (Digest)).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)
3 Citations (Scopus)

Approximating the mechanism of perfect electromagnetic boundaries by using magneto-dielectric materials

Valagiannopoulos, C. A. & Sihvola, A. H., Dec 2 2013, Proceedings of the 2013 International Conference on Electromagnetics in Advanced Applications, ICEAA 2013. p. 1036-1039 4 p. 6632400. (Proceedings of the 2013 International Conference on Electromagnetics in Advanced Applications, ICEAA 2013).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Computationally efficient optimization of coupling tapers for transmission-line networks under obliquely incident illumination

Valagiannopoulos, C. A. & Alitalo, P., Dec 1 2013, 2013 IEEE Antennas and Propagation Society International Symposium, APSURSI 2013 - Proceedings. p. 420-421 2 p. 6710871. (IEEE Antennas and Propagation Society, AP-S International Symposium (Digest)).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Concealing a perfectly conducting object with edges inside a dielectric superstrate

Valagiannopoulos, C. A. & Tsitsas, N. L., Dec 2 2013, Proceedings of the 2013 International Conference on Electromagnetics in Advanced Applications, ICEAA 2013. p. 1269-1272 4 p. 6632451. (Proceedings of the 2013 International Conference on Electromagnetics in Advanced Applications, ICEAA 2013).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

Design and free-space measurements of a simple electromagnetic cloak for conducting cylindrical objects

Alitalo, P., Valagiannopoulos, C. A. & Culhaoglu, A. E., May 16 2013, In : AIP Advances. 3, 4, 042135.

Research output: Contribution to journalArticle

1 Citation (Scopus)

Electromagnetic absorption of gaussian beams by a grounded layered structure

Valagiannopoulos, C., Apr 1 2013, In : Radioengineering. 22, 1, p. 333-340 8 p.

Research output: Contribution to journalArticle

4 Citations (Scopus)

Improving the electrostatic field concentration in a negative-permittivity wedge with a grounded "bowtie" configuration

Valagiannopoulos, C. A. & Sihvola, A., Jul 24 2013, In : Radio Science. 48, 3, p. 316-325 10 p.

Research output: Contribution to journalArticle

6 Citations (Scopus)
9 Citations (Scopus)
2 Citations (Scopus)

Low interaction of an arbitrarily large PEC cylinder with em waves filtered through a layered structure

Valagiannopoulos, C. A., Aug 14 2013, 2013 7th European Conference on Antennas and Propagation, EuCAP 2013. p. 2238-2242 5 p. 6546689. (2013 7th European Conference on Antennas and Propagation, EuCAP 2013).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Low-pass features of optical nano-filters constituted by simple layered structures

Valagiannopoulos, C. A. & Sihvola, A., Sep 1 2013, In : Microwave and Optical Technology Letters. 55, 9, p. 2099-2106 8 p.

Research output: Contribution to journalArticle

5 Citations (Scopus)

On enhancing the field in the vicinity of a metamaterial wedge with use of an auxiliary dielectric tip

Valagiannopoulos, C. A. & Sihvola, A., Aug 14 2013, 2013 7th European Conference on Antennas and Propagation, EuCAP 2013. p. 3452-3456 5 p. 6546951. (2013 7th European Conference on Antennas and Propagation, EuCAP 2013).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Optimal directional pattern design utilizing arbitrary microphone arrays: A continuous-wave approach

Delikaris-Manias, S., Valagiannopoulos, C. A. & Pulkki, V., Sep 9 2013, 134th Audio Engineering Society Convention 2013. p. 1-10 10 p. (134th Audio Engineering Society Convention 2013).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

8 Citations (Scopus)

Perfect absorption in graphene multilayers

Valagiannopoulos, C. & Nefedov, I. S., 2013, In : Journal of Optics.

Research output: Contribution to journalArticle

94 Citations (Scopus)

The effective radiation pattern concept for realistic performance estimation of LTE wireless systems

Zarbouti, D., Tsoulos, G., Athanasiadou, G. & Valagiannopoulos, C., Dec 16 2013, In : International Journal of Antennas and Propagation. 2013, 746831.

Research output: Contribution to journalArticle

8 Citations (Scopus)

Total absorption in asymmetric hyperbolic media

Nefedov, I. S., Valagiannopoulos, C. A., Hashemi, S. M. & Nefedov, E. I., Sep 23 2013, In : Scientific Reports. 3, 2662.

Research output: Contribution to journalArticle

51 Citations (Scopus)
2012

A Cartesian cloaking comprised of gradually sparser dielectric layers exploiting Snell's law

Valagiannopoulos, C. A., Jul 2 2012, Proceedings of 6th European Conference on Antennas and Propagation, EuCAP 2012. p. 2688-2692 5 p. 6206412. (Proceedings of 6th European Conference on Antennas and Propagation, EuCAP 2012).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

An iterative semi-analytical technique solving the boundary value problem of transmission through an anisotropic wedge

Valagiannopoulos, C. A. & Simovski, C. R., Dec 26 2012, In : Radio Science. 47, 6, RS6004.

Research output: Contribution to journalArticle

3 Citations (Scopus)

Cloaking a microstrip antenna: Integral equation modeling

Valagiannopoulos, C. A. & Tsitsas, N. L., Nov 7 2012, Proceedings of the 2012 International Conference on Electromagnetics in Advanced Applications, ICEAA'12. p. 383-386 4 p. 6328654. (Proceedings of the 2012 International Conference on Electromagnetics in Advanced Applications, ICEAA'12).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Concentrating the electromagnetic power in a grounded dielectric slab excited by an external Gaussian beam

Tsitsas, N. L. & Valagiannopoulos, C. A., Dec 14 2012, Proceedings of the 14th International Conference on Mathematical Methods in Electromagnetic Theory, MMET 2012. p. 304-307 4 p. 6331251. (International Conference on Mathematical Methods in Electromagnetic Theory, MMET).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)
12 Citations (Scopus)

Demonstration of electromagnetic cloaking of conducting object by dielectric material cover

Alitalo, P. & Valagiannopoulos, C. A., Aug 16 2012, In : Electronics Letters. 48, 17, p. 1056-1057 2 p.

Research output: Contribution to journalArticle

8 Citations (Scopus)

Dielectric-coated PEC cylinders which do not scatter electromagnetic waves

Valagiannopoulos, C. A., Alitalo, P. & Tretyakov, S., Nov 7 2012, Proceedings of the 2012 International Conference on Electromagnetics in Advanced Applications, ICEAA'12. p. 90-91 2 p. 6328595. (Proceedings of the 2012 International Conference on Electromagnetics in Advanced Applications, ICEAA'12).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Efficient evaluation of the Green's function for a bended coplanar waveguide

Valagiannopoulos, C. A., Jul 2 2012, Proceedings of 6th European Conference on Antennas and Propagation, EuCAP 2012. p. 2191-2195 5 p. 6206304. (Proceedings of 6th European Conference on Antennas and Propagation, EuCAP 2012).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

20 Citations (Scopus)

Electromagnetic cloaking of PEC cylinders with a single isotropic and homogeneous layer

Valagiannopoulos, C. A. & Alitalo, P., Dec 10 2012, 2012 IEEE International Symposiumon Antennas and Propagation, APSURSI 2012 - Proceedings. 6348712. (IEEE Antennas and Propagation Society, AP-S International Symposium (Digest)).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Field enhancement in a grounded dielectric slab by using a single superstrate layer

Valagiannopoulos, C. A. & Tsitsas, N. L., Dec 3 2012, In : Advances in OptoElectronics. 2012, 439147.

Research output: Contribution to journalArticle

7 Citations (Scopus)
3 Citations (Scopus)

Integral equation analysis of a low-profile receiving planar microstrip antenna with a cloaking superstrate

Valagiannopoulos, C. A. & Tsitsas, N. L., May 28 2012, In : Radio Science. 47, 2, RS2022.

Research output: Contribution to journalArticle

25 Citations (Scopus)
2 Citations (Scopus)
7 Citations (Scopus)

The influence of refractive index, excitation and observation on PEC/PMC boundary realization

Valagiannopoulos, C. A. & Sihvola, A. H., Dec 10 2012, 2012 IEEE International Symposiumon Antennas and Propagation, APSURSI 2012 - Proceedings. 6348494. (IEEE Antennas and Propagation Society, AP-S International Symposium (Digest)).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)