T. Imachi, Koudai Kita, M. Ozaki, S. Yagitani, R. Higashi
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Characteristics of electric antennas aboard scientific spacecraft
To improve the accuracy of absolute calibration of a wire antenna which is used to observe electric fields on a scientific spacecraft, we analyzed the relationship between the antenna output voltage and electric field intensity. As a method we made "Rheometry experiment", measuring the output voltage of small model antenna which is placed in a known electric field in the water, and according to the result we investigate a theory considering the structure of antenna and the influence of the spacecraft body. We measured the frequency dependence of the effective length of a wire antenna at low frequencies, and made a theoretical method to describe the result of the experiment.
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