Coupled-Line Couplers Based on the Composite Right/Left-Handed (CRLH) Transmission Lines

M Movahhedi, R Keshavarz - Trends in Electromagnetism–From …, 2010 - books.google.com
Recently, the idea of complex materials in which both the permittivity and the permeability
possess negative real values at certain frequencies has received considerable attention. In …