Longitudinally Independent Matching and Arbitrary Wave Patterning Using $varepsilon$ -Near-Zero Channels


We have a tendency to experimentally verify the unusual radiation properties of sources placed inside and in the neighborhood of effective -close to-zero slender (ENZ) channels. By utilizing the distinctive properties of a slender waveguide channel operated at cutoff, a static-like uniformly enhanced electrical field distribution will be induced at microwave frequencies over long distances. 1st, we show how this field uniformity provides a mechanism for position-invariant impedance matching for localized sources placed among the channel, enabling a unique coaxial-to-waveguide matching highly invariant to discontinuities. We have a tendency to then extend these ideas to sources placed outside the ENZ channels, realizing a microwave lens with distinctive radiation patterning properties. The realized ENZ lens is experimentally demonstrated under several excitation conditions, highlighting the chance of tailoring the impinging wavefront with giant flexibility.

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