ANTENNA SYSTEM

PROBLEM TO BE SOLVED: To reduce weight and to decrease the manufacturing cost by making a circumferential part of a reflecting mirror surface to reflect only an S band wave and to transmit a K band wave and a middle part of the reflecting mirror surface to reflect both the S and K band waves. SOLUTI...

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Bibliographic Details
Main Author MASUYAMA MASAYUKI
Format Patent
LanguageEnglish
Published 31.07.1997
Edition6
Subjects
ANTENNAS, i.e. RADIO AERIALS
BASIC ELECTRIC ELEMENTS
ELECTRICITY
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Summary:PROBLEM TO BE SOLVED: To reduce weight and to decrease the manufacturing cost by making a circumferential part of a reflecting mirror surface to reflect only an S band wave and to transmit a K band wave and a middle part of the reflecting mirror surface to reflect both the S and K band waves. SOLUTION: An antenna using a 1st feeder part 1 is composed of a sub reflecting mirror 3 and a reflecting mirror 4. On the other hand, an antenna using a 2nd feeder part 2 is composed of a reflecting mirror being the combination of the reflecting mirror 4 and part 5 of a reflecting mirror surface. For example, when the antenna using the 1st feeder part 1 is used for a K band wave and the antenna using the 1st feeder part 2 is used for an S band wave, since the requirement of the reflecting mirror shape precision required by the S band is more moderate than the requirement of the reflecting mirror shape precision required by the K band, the part 5 of the reflecting mirror surface has only to meet the reflecting mirror shape precision required by the S band. Since the part 5 of the reflecting mirror surface transmits the radio wave of the K band through itself regardless of the reflecting mirror shape precision, the performance for the K band antenna is not damaged.
Bibliography:Application Number: JP19960005009