ANTENNA DEVICE

Good electric characteristics are obtained even after an antenna being further incorporated into an antenna apparatus including an antenna case having a limited space. An antenna device 31 is formed on an antenna substrate 30 installed upright in an antenna base 20. A flat antenna unit 35 is fastene...

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Bibliographic Details
Main Authors OHSHIMA, MOTOKI, INOUE, JINICHI, ARAYAMA, NOBUO, WAKUI, MASASHI
Format Patent
LanguageEnglish
French
German
Published 04.08.2010
Subjects
ANTENNAS, i.e. RADIO AERIALS
BASIC ELECTRIC ELEMENTS
ELECTRICITY
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Summary:Good electric characteristics are obtained even after an antenna being further incorporated into an antenna apparatus including an antenna case having a limited space. An antenna device 31 is formed on an antenna substrate 30 installed upright in an antenna base 20. A flat antenna unit 35 is fastened to the antenna base 20 so that the flat antenna unit 35 is immediately below the antenna device 31. If the wavelength of a center frequency in an operating frequency band of the flat antenna unit 35 is », an interval between an upper surface of the flat antenna unit 35 and a lower end of the antenna device 31 is set to about 0.25» or more. Accordingly, it becomes possible to make directional characteristics of radiation in a horizontal plane of the flat antenna unit 35 non-directive without being affected by the antenna device 31 and also to achieve good gain characteristics.
Bibliography:Application Number: EP20080792644