Presentation	2003/7/23 Rheometry experiment for a wire antenna aboard spacecraft at low frequencies Tomohiko IMACHI, Satoshi YAGITANI, Isamu NAGANO, Ryoichi HIGASHI, satoshi ESAKI, Minoru TSUTSUI, Hiroshi MATSUMOTO,
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Abstract(in English)	For observation of plasma waves by a scientific spacecraft, we usually use wire dipole antennas for AC electric field and dipole probes for DC field measurement. An accurate value of effective length of the antenna (h_) is required to calculate absolute intensities of the electric fields from the output voltage of the antennas, and it is known as L/2 for wire dipole antennas and L for dipole probes. In this paper, we try to clarify the transition of h_ from L to L/2 with frequency. At first, we report the result of a "rheometry experiment" which measures the frequency dependence of h_, and then a theoretical analysis by using its equivalent circuits. The result shows that a wire dipole antenna works as a LONG dipole voltage probe.
Keyword(in Japanese)	(See Japanese page)
Keyword(in English)	wire dipole antenna / effective length / rheometry experiment / quasi-static electric field / scientific spacecraft
Paper #	A・P2003-48
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Conference Information
Committee	AP
Conference Date	2003/7/23(1days)
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Paper Information
Registration To	Antennas and Propagation (A・P)
Language	JPN
Title (in Japanese)	(See Japanese page)
Sub Title (in Japanese)	(See Japanese page)
Title (in English)	Rheometry experiment for a wire antenna aboard spacecraft at low frequencies
Sub Title (in English)
Keyword(1)	wire dipole antenna
Keyword(2)	effective length
Keyword(3)	rheometry experiment
Keyword(4)	quasi-static electric field
Keyword(5)	scientific spacecraft
1st Author's Name	Tomohiko IMACHI
1st Author's Affiliation	Facility of Engineering, Kanazawa University()
2nd Author's Name	Satoshi YAGITANI
2nd Author's Affiliation	Graduate School of Natural Science and Technology, Kanazawa University
3rd Author's Name	Isamu NAGANO
3rd Author's Affiliation	Graduate School of Natural Science and Technology, Kanazawa University
4th Author's Name	Ryoichi HIGASHI
4th Author's Affiliation	Graduate School of Natural Science and Technology, Kanazawa University
5th Author's Name	satoshi ESAKI
5th Author's Affiliation	Graduate School of Natural Science and Technology, Kanazawa University
6th Author's Name	Minoru TSUTSUI
6th Author's Affiliation	Kyoto Sangyo University
7th Author's Name	Hiroshi MATSUMOTO
7th Author's Affiliation	Radio Science Center for Space & Atmosphere, Kyoto University
Date	2003/7/23
Paper #	A・P2003-48
Volume (vol)	vol.103
Number (no)	230
Page	pp.pp.-
#Pages	6
Date of Issue