Gaafar, Mahmoud A. https://orcid.org/0000-0001-5887-5772
Jalas, Dirk https://orcid.org/0000-0003-2589-2765
O’Faolain, Liam
Li, Juntao
Krauss, Thomas F. https://orcid.org/0000-0003-4367-6601
Petrov, Alexander Yu. https://orcid.org/0000-0002-9213-9645
Eich, Manfred
Article History
Received: 27 June 2017
Accepted: 14 March 2018
First Online: 13 April 2018
Change Date: 20 August 2018
Change Type: Correction
Change Details: The original version of this article contained an error in first sentence of the Acknowledgements, which incorrectly read ‘M.A.G, D.J., A.Y.P. and M.E. acknowledge the support of the German Research Foundation under grant no. EI 391/13-2, and appreciate the support of CST, Darmstadt, Germany, with their Microwave Studio Software.’ The correct version states ‘261759120’ in place of ‘EI 391/13-2’. This has been corrected in both the PDF and HTML versions of the article.
Competing interests
: The authors declare no competing interests.