Abstract:In this article, a wideband microstrip 4 Â 4 Nolen matrix using novel phase shifters is proposed. Because of the unequal electrical paths connecting one input to every output, Nolen matrices in standard form usually introduce significant phase dispersion and amplitude instability, limiting the effective bandwidth. A novel phase shifter consisting of multiple open-and short-circuited stubs is designed, whose rate of change of phase with frequency can be conveniently adjusted. This phase shifter can be used to b… Show more
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