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A planar epsilon-near-zero (ENZ) tunnel structure implemented on substrate integrated waveguide (SIW) technology is used to evaluate the complex dielectric permittivity of various materials. Design, optimization, and fabrication of the ENZ tunnel structure are explained. Simulations and measurements on various dielectric samples using the cavity(More)
Universities are increasingly using the Internet to improve undergraduate teaching, since it provides access to sources not conveniently obtainable through other means, allows for the creation of unusually rich course materials, it is an exceptionally fine tool for creating densely woven, engaging, and highly demanding new course materials, and it can(More)
This paper presents a wavelet-neural network based on the L 1-norm minimisation for learning chaotic time series. The proposed approach, which is based on multi-resolution analysis, uses wavelets as activation functions in the hidden layer of the wavelet-network. We propose using the L 1-norm, as opposed to the L 2-norm, due to the well-known fact that the(More)