Measurements of a Cassegrain Antenna with Shaped Reflectors in the Fresnel Region by Defocusing Technique
Summary :
Measurements of a far-field gain of a large Cassegrain antenna with shaped reflectors by defocusing method are discussed. Defocused-path-length variation of a shaped antenna does not considerably differ from that a conventional Cassegrain antenna. In a model antenna, even when the maximum spherical phase error is 180 degrees, defocusing method can give the far-field gain within 0.1 dB error, if the illumination does not change by defocusing.
- Publication
- IEICE TRANSACTIONS on transactions Vol.E63-E No.2 pp.114-115
- Publication Date
- 1980/02/25
- Publicized
- Online ISSN
- DOI
- Type of Manuscript
- LETTER
- Category
- Antenna and Propagation
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Takeyuki OJIMA, "Measurements of a Cassegrain Antenna with Shaped Reflectors in the Fresnel Region by Defocusing Technique" in IEICE TRANSACTIONS on transactions,
vol. E63-E, no. 2, pp. 114-115, February 1980, doi: .
Abstract: Measurements of a far-field gain of a large Cassegrain antenna with shaped reflectors by defocusing method are discussed. Defocused-path-length variation of a shaped antenna does not considerably differ from that a conventional Cassegrain antenna. In a model antenna, even when the maximum spherical phase error is 180 degrees, defocusing method can give the far-field gain within 0.1 dB error, if the illumination does not change by defocusing.
URL: https://global.ieice.org/en_transactions/transactions/10.1587/e63-e_2_114/_p
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@ARTICLE{e63-e_2_114,
author={Takeyuki OJIMA, },
journal={IEICE TRANSACTIONS on transactions},
title={Measurements of a Cassegrain Antenna with Shaped Reflectors in the Fresnel Region by Defocusing Technique},
year={1980},
volume={E63-E},
number={2},
pages={114-115},
abstract={Measurements of a far-field gain of a large Cassegrain antenna with shaped reflectors by defocusing method are discussed. Defocused-path-length variation of a shaped antenna does not considerably differ from that a conventional Cassegrain antenna. In a model antenna, even when the maximum spherical phase error is 180 degrees, defocusing method can give the far-field gain within 0.1 dB error, if the illumination does not change by defocusing.},
keywords={},
doi={},
ISSN={},
month={February},}
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TY - JOUR
TI - Measurements of a Cassegrain Antenna with Shaped Reflectors in the Fresnel Region by Defocusing Technique
T2 - IEICE TRANSACTIONS on transactions
SP - 114
EP - 115
AU - Takeyuki OJIMA
PY - 1980
DO -
JO - IEICE TRANSACTIONS on transactions
SN -
VL - E63-E
IS - 2
JA - IEICE TRANSACTIONS on transactions
Y1 - February 1980
AB - Measurements of a far-field gain of a large Cassegrain antenna with shaped reflectors by defocusing method are discussed. Defocused-path-length variation of a shaped antenna does not considerably differ from that a conventional Cassegrain antenna. In a model antenna, even when the maximum spherical phase error is 180 degrees, defocusing method can give the far-field gain within 0.1 dB error, if the illumination does not change by defocusing.
ER -
English
