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- W3118343896 abstract "The effects of surface errors on paraboloidal reflector antennas are examined using finite element simulation software. The study utilizes a new surface generation tool to produce surfaces with both random and systematic errors for the simulations. Two different sized parabolic reflectors are analyzed with three different types of surface deformations. The finite element simulation results are then compared to those produced by Ruze’s antenna tolerance theory. The results show that the commonly used metric of surface root-mean square error alone is not sufficient to characterize expected changes in the radiation pattern, as is often done many analysis techniques for reflector antennas. Specifically, it is shown that for the various surface error types with differing correlation lengths, the predicted values could be off by as much as 1 dB for gain loss, 1.5 dB for side lobe levels, and 0.5o for root-mean square errors as small as λ/70. When results generated using Ruze’s method are compared with the finite element results, Ruze’s method over predicts gain loss, under predicts increases in side lobe levels (especially for surface errors with large correlation lengths), and is incapable of capturing any changes to half-power beam width." @default.
- W3118343896 created "2021-01-18" @default.
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- W3118343896 date "2021-01-04" @default.
- W3118343896 modified "2023-09-23" @default.
- W3118343896 title "Effects of Surface Error on Deployable Paraboloidal Reflectors Using FEM and Theoretical Techniques" @default.
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- W3118343896 doi "https://doi.org/10.2514/6.2021-1150" @default.
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