Pressure-resistant explosion-proof container having a slit waveguide
AssigneeYokogawa Electric Corporation
InventorMasaaki Yonezawa
Life of this patent
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Abstract
To provide a pressure-resistant explosion-proof container in which a wireless circuit housed inside the pressure-resistant explosion-proof container can transmit and receive a high frequency signal, without installing an antenna outside. A pressure-resistant explosion-proof container includes a container made of metal, a slit functioning as an explosion-proof clearance that is formed by penetrating a wall surface of the container, and a cavity resonator that is provided in the container and in which an antenna is built that transmits and receives a high frequency signal by using the slit as a waveguide.
Claims9
A pressure-resistant explosion-proof container comprising:
- a container made of metal;
- a slit opening connecting an interior of the container and an outside of the container, functioning as an explosion-proof clearance;
- and
- a cavity resonator that is provided in the container and in which an antenna is configured to wirelessly transmit and receive a high frequency signal by using the slit opening as an open ended waveguide, the high frequency signal being transmitted to or received from the outside of the container,
- wherein when the cavity resonator that is built in the container is set as a first cavity resonator, and an antenna that is built in the first cavity resonator is set as a first antenna, a second cavity resonator in which a second antenna is built is provided on an outer wall surface of the container to be opposed to the first cavity resonator, and a third antenna is provided in an outer space of the second cavity resonator, and the second antenna and the third antenna are connected by a high frequency cable.
Dependencies are inferred from the claim text.