TWI852588B
Provided is an antenna device capable of realizing isolation of more than 20 dB while keeping its size compact.The antenna device comprises a semicircular arc shaped first outer antenna element and first inner antenna element, which are firmed concentrically on one surface of an insulating substrate...
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| Format: | Patent |
| Sprache: | chi |
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| Zusammenfassung: | Provided is an antenna device capable of realizing isolation of more than 20 dB while keeping its size compact.The antenna device comprises a semicircular arc shaped first outer antenna element and first inner antenna element, which are firmed concentrically on one surface of an insulating substrate, a semicircular arc shaped second outer antenna element and second inner antenna element, which are formed concentrically on another surface of the insulating substrate, an antenna-side coupling unit formed on the one surface of the insulating substrate, and a feed coupling unit formed in a reversed stated by 180 degrees with respect to the coupling unit on the other surface of the insulating substrate. The first outer antenna element and the second outer antenna element are connected to the antenna-side coupling unit via connection lines and a first through hole and the first inner antenna element and the second inner antenna element are connected to the antenna-side coupling unit via connection lines and a secon |
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