Five-channel frequency-division multiplexing using low-loss epsilon-near-zero metamaterial waveguide

Eutectic epsilon-near-zero metamaterial terahertz waveguides.

We present and analyze the unique phenomena of enhanced THz transmission through a subwavelength LiF dielectric rod lattice embedded in an epsilon-near-zero KCl host. Our experimental results in combination with theoretical calculations show that subwavelength waveguiding of terahertz radiation is achieved within an alkali-halide eutectic metamaterial as result of the coupling of Mie-resonance ...

Experimental verification of epsilon-near-zero metamaterial coupling and energy squeezing using a microwave waveguide.

Utilizing a microwave setup, we experimentally verify our recently developed theory of energy squeezing and tunneling [Phys. Rev. Lett. 97, 157403 (2006)10.1103/PhysRevLett.97.157403] through an ultranarrow waveguide channel that mimics zero-permittivity properties. Exploiting the infinite phase velocity supported by a waveguide transition section at cutoff, we test our theory of tunneling in t...

Broadband Epsilon-Near-Zero (ENZ) and Mu-Near-Zero (MNZ) Active Metamaterial

Channel Estimation for Orthogonal Frequency Division Multiplexing

The Channel estimation is one of the fundamental issues of OFDM system design. Techniques that are used for channel estimation of OFDM system are least-square (LS) and minimum-mean-square-error (MMSE) techniques. The LS Estimator algorithm is very simple, but it may be subject to noise enhancement, so the performance is worse. The MMSE Estimator gives better performance than LS and MSE is minim...

Modeling of Tunneling Effects in Epsilon-Near-Zero Waveguide

In this paper we present a simple method for efficient modeling of the tunneling effect in a non-homogeneous epsilon-near-zero (ENZ) waveguide, using an equivalent circuit approach. ENZ waveguide consists of rectangular waveguides filled with two-layered dielectric, E-step, and a narrow channel. It was shown that the E-step in a non-homogenous structure can be modeled rather simply using a shun...