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Contiguous collinear dipoles connected with non-Foster circuits (NFCs) was proposed for improving the bandwidth of arrays. Prior literature focused on use of ideal negative inductance and for broadside scan only. This paper presents results of a feasibility study to evaluate and characterize performance of dipole arrays loaded with non-Foster circuits in terms of VSWR, gain, bandwidth (L Ku band)...
The mushroom-type artificial magnetic conductor (AMC), originally presented by Sievenpiper et al., (IEEE Trans. Microwave Theory Tech., 47, pp. 2059–2074, 1999) has found numerous applications, e.g., underneath horizontally polarized antennas, between planar antennas for reducing the coupling between them, for reducing the E-plane edge diffraction from finite ground planes, and for suppression of...
Superluminal waveguides periodically loaded with non-Foster circuits are investigated. Such systems are shown to have right half plane poles for the equivalent two-port scattering parameters for practical values of waveguide lengths consisting of many unit cells, and hence, they are unstable.
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