Antenna device
The antenna device uses a conductor to enhance radiation directivity and gain towards the earth's surface by reflecting and superimposing radiation patterns, addressing distortion caused by underground dielectric effects, enabling compact underground installation.
JP7776744B2Active Publication Date: 2025-11-27MITSUMI ELECTRIC CO LTD
Patent Information
- Application Number
- JP2021208510
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- Filing Date
- 2021-12-22
- Publication Date
- 2025-11-27
- Estimated Expiration
- 2041-12-22
Smart Images
Figure 0007776744000001 
Figure 0007776744000002 
Figure 0007776744000003
Abstract
To provide an antenna device capable of improving the radiation directivity to the ground surface and radiation gain when the frequency of radiated radio waves is low.SOLUTION: An antenna device has an enclosure whose bottom is placed on the ground surface or buried underground, a substrate with a circuit housed in the enclosure, an antenna located on the substrate and radiating low-frequency radio waves by feeding power from the circuit, and a conductor located at the bottom and having an area larger than the substrate. The conductor is disposed outside the enclosure or inside the enclosure at the bottom.SELECTED DRAWING: Figure 1
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Citation Information
Patent Citations
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