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US 11,444,383 B2Granted
Antenna device, antenna system, and instrumentation system
AssigneeMorita Tech Co., Ltd.
InventorsOsamu Morita, Akinori Saeki, Satoshi Ogura
Life of this patent
Estimating the term…
Abstract
An object of the present invention is to suppress occurrence of disturbance in pass amplitude characteristics within a band and disturbance in return loss characteristics in the band due to total reflection, improve cutoff performance, and acquire a favorable gain. An antenna device 1 includes a waveguide body 5 including a coaxial waveguide conversion unit 6 that includes an inner space 8 and a connector attachment hole 22, and a closure member 30. The antenna device 1 also includes a connector 50 including a connector body 51, a center conductor 60, and a radiator 54 b configured by an end portion 60 a of the center conductor that adapts the protruding length of the end portion to a specific frequency band.
Claims14
An antenna device comprising:
- a waveguide body including
- a coaxial waveguide conversion unit that is hexahedral and is made of a conductive material and including an inner space formed by penetrating a first surface and a second surface facing each other, and a connector attachment hole continuously formed between a third surface orthogonal to the first surface and the second surface and the inner space, and
- a closure member that is conductive and that closes an opening of the inner space on the second surface side;
- and
- a connector including
- a connector body that is conductive and is attached to the connector attachment hole from the inner space toward outside, with an inner end of the connector body not protruding into the inner space,
- a center conductor arranged to axially penetrate a central portion of the connector body, with an end portion thereof protruding from the inner end of the connector body into the inner space by a predetermined length, and
- a radiator configured by the end portion of the center conductor protruding into the inner space, to radiate radio waves from the center conductor into the inner space by adapting the predetermined length to a specific frequency band, wherein
- the coaxial waveguide conversion unit includes a first waveguide member having a concave portion that forms the inner space on one surface, and a second waveguide member detachably attached to the one surface of the first waveguide member to close the one surface side of the concave portion to form the inner space,
- a screw hole is formed each at positions having the concave portion provided therebetween on the one surface of the first waveguide member, and
- a long hole extending parallel to the axial direction of the inner space is each formed at a position in the second waveguide member coming into alignment with each screw hole, so as to be able to screw a screw in each of the screw holes via each of the long holes.
8 more elements
An antenna system comprising a pair of antenna devices each comprising:
- a waveguide body including
- a coaxial waveguide conversion unit that is hexahedral and is made of a conductive material and including an inner space formed by penetrating a first surface and a second surface facing each other, and a connector attachment hole continuously formed between a third surface orthogonal to the first surface and the second surface and the inner space, and
- a closure member that is conductive and that closes an opening of the inner space on the second surface side;
- and
- a connector including
- a connector body that is conductive and is attached to the connector attachment hole from the inner space toward outside, with an inner end of the connector body not protruding into the inner space,
- a center conductor arranged to axially penetrate a central portion of the connector body, with an end portion thereof protruding from the inner end of the connector body into the inner space by a predetermined length, and
- a radiator configured by the end portion of the center conductor protruding into the inner space, to radiate radio waves from the center conductor into the inner space by adapting the predetermined length to a specific frequency band, wherein
- the coaxial waveguide conversion unit includes a first waveguide member having a concave portion that forms the inner space on one surface, and a second waveguide member detachably attached to the one surface of the first waveguide member to close the one surface side of the concave portion to form the inner space,
- a screw hole is formed each at positions having the concave portion provided therebetween on the one surface of the first waveguide member, and
- a long hole extending parallel to the axial direction of the inner space is each formed at a position in the second waveguide member coming into alignment with each screw hole, so as to be able to screw a screw in each of the screw holes via each of the long holes, wherein
- each of the antenna devices is designated as a first antenna device and a second antenna device, and
- radio waves radiated from the first antenna device is received by the second antenna device arranged opposite to a radiation direction of the first antenna device.
10 more elements
Dependencies are inferred from the claim text.