Antenna apparatus
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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| Main Authors | , , , |
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| Format | Patent |
| Language | English |
| Published |
16.04.2013
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| Subjects | |
| Online Access | Get full text |
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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 λ, 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 λ 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. |
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| Bibliography: | Application Number: US20080449151 |