Supercoupling Effect in Substrate Integrated Waveguide Loaded with Mu-Near-Zero Material and its Potential Application

In this work, a supercoupling effect is corroborated in a substrate integrated waveguide (SIW) via a perfectly mismatched channel comprising of the mu-near-zero (MNZ) material. This phenomenon is actually the dual of the tunneling effect as observed due to the epsilon-near-zero (ENZ) channel. For observing the supercoupling, two SIWs having highly different cross-sections are coupled with the broader SIW loaded with the dispersive material providing MNZ at a certain frequency. At this frequency, the SIW yields a high transmission coefficient along with the constant magnetic field intensity throughout the channel. The channel, is then, ultimately exploited at the MNZ for testing the magnetic samples possessing varying permeabilities, hence, perceiving its potential application.