Manhole cover type omnidirectional antenna
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United States of America Patent
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Jun 4, 2019
Grant Date -
Jun 1, 2017
app pub date -
Nov 25, 2016
filing date -
Nov 27, 2015
priority date (Note) -
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status (Latency Note)
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Abstract
Disclosed is a manhole type omnidirectional antenna having a relatively small angle between a main beam direction and the Earth's surface and exhibiting omnidirectional characteristics to allow long-range communication, wherein the manhole type omnidirectional antenna includes a manhole cover installed in a manhole in the Earth's surface; a main body installed in a cavity of an upper surface of the manhole cover and configured to convert an electrical signal into an electromagnetic wave to wirelessly communicate with a gateway separated from the manhole cover; and a radome inserted into the cavity to cover the main body.
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