Eigenmode Analysis of Small Multielement Spherical Antennas

When designing an antenna to occupy a volume with dimensions small relative to the wavelength, one of the primary challenges is optimizing the bandwidth. Analyzing the behavior of two-, four-, and six-arm small multielement spherical antennas provides physical insight into the multiresonant impedance behavior of these antennas, clearly illustrating their ultimate performance limits and yielding ideas for improved designs. The analysis can be applied towards understanding the behavior of other multielement antenna structures as well.

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