WO2014103092A1 - アンテナ装置 - Google Patents
アンテナ装置 Download PDFInfo
- Publication number
- WO2014103092A1 WO2014103092A1 PCT/JP2013/004354 JP2013004354W WO2014103092A1 WO 2014103092 A1 WO2014103092 A1 WO 2014103092A1 JP 2013004354 W JP2013004354 W JP 2013004354W WO 2014103092 A1 WO2014103092 A1 WO 2014103092A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- reflecting mirror
- sub
- antenna device
- main
- primary radiator
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
- H01Q19/10—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces
- H01Q19/18—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces having two or more spaced reflecting surfaces
- H01Q19/19—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces having two or more spaced reflecting surfaces comprising one main concave reflecting surface associated with an auxiliary reflecting surface
- H01Q19/192—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces having two or more spaced reflecting surfaces comprising one main concave reflecting surface associated with an auxiliary reflecting surface with dual offset reflectors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/1207—Supports; Mounting means for fastening a rigid aerial element
- H01Q1/1228—Supports; Mounting means for fastening a rigid aerial element on a boom
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/02—Waveguide horns
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
- H01Q19/10—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces
- H01Q19/18—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces having two or more spaced reflecting surfaces
- H01Q19/19—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces having two or more spaced reflecting surfaces comprising one main concave reflecting surface associated with an auxiliary reflecting surface
- H01Q19/191—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces having two or more spaced reflecting surfaces comprising one main concave reflecting surface associated with an auxiliary reflecting surface wherein the primary active element uses one or more deflecting surfaces, e.g. beam waveguide feeds
Definitions
- the present invention relates to an antenna device, and more particularly to an antenna device having a primary radiator, a main reflecting mirror, and a sub-reflecting mirror.
- An antenna device having a primary radiator, a main reflector and a sub reflector is used. Such an antenna device is required to have high strength in order to withstand outdoor use. Further, such an antenna device is required to have a low sidelobe characteristic depending on the application.
- Patent Document 1 a side wall of a cylindrical shell attached to the outer periphery of a main reflector, a part of or all of a sub reflector and a primary radiator, and a housing of a truncated cone shell attached to the side plate are accommodated.
- An antenna device is disclosed that includes a body and a reinforcing shell made of a part of a conical shell attached to the left and right sides of the side plate and the casing. With this configuration, the antenna device has high strength. Further, in such an antenna device, a corrugated horn antenna may be used to obtain a low sidelobe characteristic as a primary radiator.
- the corrugated horn antenna has a bellows-like protrusion on the inner wall surface, and can reduce side lobes.
- the antenna device disclosed in Patent Document 1 is composed of many parts, and requires a support part in order to accurately position the sub-reflecting mirror.
- the present invention has been made to solve such a problem, and an object of the present invention is to provide an antenna device that can accurately perform positioning even with a small number of parts and has low side lobe characteristics.
- the antenna device is A primary radiator, The main reflector, A sub-reflector, A holding portion that holds the relative position and orientation of the sub-reflecting mirror and the main reflecting mirror fixedly;
- the holding portion integrally includes a side portion that surrounds at least a part of a radio wave path from the primary radiator to the sub-reflecting mirror as a shroud.
- the supporting part for supporting the sub-reflecting mirror is omitted by the holding unit, and the sub-reflecting mirror and the main reflecting mirror are held with one component and accurately positioned. Further, the holding portion prevents leakage of radio waves and reduces side lobes.
- an antenna device that can accurately perform positioning even with a small number of parts and has low side lobe characteristics.
- FIG. 1 shows a side view of an antenna device attached to a pole.
- FIG. 2 is a perspective view of the antenna device.
- FIG. 3 shows the front of the antenna device attached to the pole. 2 and 3, illustration of the primary radiator 3 described later is omitted.
- the antenna device 1 includes a main reflecting mirror 2, a primary radiator 3, a holding unit 4, and a sub-reflecting mirror 5.
- the main reflecting mirror 2 is a reflecting mirror having, for example, a parabolic surface having a predetermined depth and diameter as a reflecting surface.
- the opening surface of the main reflecting mirror 2 is elliptical.
- the primary radiator 3 has a predetermined beam width, any antenna may be used.
- the primary radiator 3 for example, a dielectric antenna, a patch antenna, a slot antenna, or the like can be used.
- the primary radiator 3 is provided inside the holding unit 4 with the direction of radiating radio waves directed toward the sub-reflecting mirror 5.
- the holding portion 4 is made of a material that absorbs electromagnetic waves such as metal, and has a hollow, substantially rectangular parallelepiped shape with an open upper surface.
- the holding part 4 includes a front part 41, side parts 42 and 42, surrounding parts 43 and 43, and a back part 44.
- the front part 41 has a holding hole 45 that holds the position and orientation of the sub-reflecting mirror 5 fixedly by fitting the sub-reflecting mirror 5 together.
- the side portions 42 and 42 integrally fix the surrounding portions 43 and 43 using fixing means such as welding or bolt fastening.
- the side parts 42 and 42 are erected continuously and integrally with the front part 41.
- the surrounding parts 43 and 43 are respectively raised from the upper ends of the side parts 42 and 42 and connected to at least a part of the peripheral part of the main reflecting mirror 2 to hold the main reflecting mirror 2 so that its position and orientation are fixed. Serves as a shroud.
- the surrounding parts 43, 43 surround at least part of the radio wave path from the sub-reflecting mirror 5 to the main reflecting mirror 2.
- the holding unit 4 fixes the relative position and orientation of the sub-reflecting mirror 5 and the main reflecting mirror 2.
- An antenna mount is attached to the back surface portion 44.
- the holding unit 4 covers at least a part of the radio wave path from the primary radiator 3 to the sub-reflecting mirror 5 by the front part 41, the side parts 42 and 42, the surrounding parts 43 and 43, and the back part 44.
- the holding portion 4 may have a hole.
- the side portions 42 and 42 may have a large number of holes.
- the front portion 41 and the side portions 42 and 42 may be formed by bending a single plate, or may be manufactured by welding a plurality of plates.
- the shape of the holding portion 4 is a substantially rectangular parallelepiped as described above. However, at least a part of the radio wave path from the primary radiator 3 to the sub-reflecting mirror 5 and the sub-reflecting mirror 5 are used. Any structure may be used as long as it has a structure that covers the paraboloid, and for example, a cylindrical body may be used. An electromagnetic wave absorber may be installed on the inner wall of the holding unit 4.
- the sub-reflecting mirror 5 is a reflecting mirror having, for example, a parabolic surface having a predetermined depth and diameter as a reflecting surface, like the main reflecting mirror 2.
- the sub-reflecting mirror 5 is held by the holding unit 4 as described above.
- the sub-reflecting mirror 5 is designed to suppress the leakage of radio waves. It is preferable that the reflector 2 is arranged so as to be within the range of the horizontal length A of the main reflector from the rear end portion 22 of the reflector 2.
- the opening surface of the main reflecting mirror 2 is elliptical, but it may be circular.
- the sub-reflecting mirror 5 is fitted into the holding hole 45 and fixed to the holding portion 4, it is more preferable that the sub-reflecting mirror 5 and the holding portion 45 are integrated. As a result, the relative positional relationship between the sub-reflecting mirror 5 and the main reflecting mirror 2 can be more securely fixed.
- the primary radiator 3 is provided inside the holding unit 4 with the radio wave radiating direction toward the sub-reflecting mirror 5, but it may be provided in the vicinity of the attachment location of the antenna device 1.
- FIG. 4 shows the back of the antenna device attached to the pole.
- the antenna device 1 is fixed to a pole 8 via an antenna mount 6 and a pole fixing means 10.
- the antenna mount 6 which is a plate-like body bent in an L shape is attached to the back surface portion 44 of the holding portion 4 by fastening a bolt 7 to one end portion.
- the bolt 9 (see FIG. 1) is fastened to the other end of the antenna mount 6 and attached to the pole fixing means 10.
- the pole fixing means 10 is fixed to the pole 8 by tightening the bolt 11 or the like. As a result, the antenna device 1 is fixed to the pole 8.
- the holding unit 4 holds the relative positional relationship between the main reflecting mirror 2 and the sub-reflecting mirror 5 in a fixed manner, omits supporting parts and reduces the number of parts, and performs positioning accurately. Can do.
- the holding unit 4 is made of an electromagnetic wave absorbing material and has a structure that surrounds at least a part of the radio wave path from the primary radiator 3 to the sub-reflecting mirror 5, thereby preventing leakage of radio waves from the sub-reflecting mirror 5. It functions as a leakage prevention means.
- the surrounding portion 43 of the holding portion 4 rises from the upper end of the side surface portion 42 and is connected to at least a part of the peripheral edge portion of the main reflecting mirror 2 so that at least a radio wave path from the sub reflecting mirror 5 to the main reflecting mirror 2 is reached. Since a portion is surrounded, leakage of radio waves from the main reflecting mirror 2 can be prevented. That is, the holding unit 4 functions as a leakage prevention unit for the antenna device 1. Further, the sub-reflecting mirror 5 can be further reduced in leakage by disposing the sub-reflecting mirror 5 in the horizontal length A range from the rear end portion 22 (see FIG. 1) of the main reflecting mirror 2. In addition, this arrangement also achieves downsizing of the antenna device.
- a horn antenna having a flat inner wall surface is used as the primary radiator instead of the corrugated horn, the necessary low side lobe characteristics can be maintained. That is, as the primary radiator 3, not only a corrugated horn antenna but also a horn antenna having a flat inner wall surface can be used.
- a horn antenna having a flat inner wall surface is inferior in low sidelobe characteristics to a corrugated horn antenna, but does not require cutting and is inexpensive. That is, by using a horn antenna having a flat inner wall surface, it is possible to accurately perform positioning even with a small number of parts while maintaining necessary low side lobe characteristics, and to manufacture an inexpensive antenna device.
- the present invention relates to an antenna device, and more particularly to an antenna device having a primary radiator, a main reflecting mirror, and a sub-reflecting mirror.
- 1 antenna device 1 antenna device, 2 main reflector, 3 primary radiator, 4 holding part, 5 Sub-reflector, 6 Antenna mount, 7, 9, 11 bolt, 8 pole, 10 pole fixing means, 41 Front part, 42 Side part, 43 Enveloping part, 44 Back part, 45 Holding hole
Abstract
Description
一次放射器と、
主反射鏡と、
副反射鏡と、
前記副反射鏡と前記主反射鏡の相対的な位置及び向きを固定的に保持する保持部をと、を備え、
前記保持部は、前記一次放射器から前記副反射鏡に至る電波経路の少なくとも一部をシュラウドとして包囲する側面部を一体的に有することを特徴とする。
以下、図1、図3及び図4を用いて、アンテナ装置1の使用方法について説明する。図4は、ポールに取り付けたアンテナ装置の背面を示す。図1、図3及び図4を参照すると、アンテナ装置1は、ポール8に、アンテナマウント6及びポール固定手段10を介して固定される。詳細には、L字状に屈曲した板状体であるアンテナマウント6を、一端部にボルト7を締結するなどして保持部4の背面部44に取り付ける。さらにアンテナマウント6の他端部にボルト9(図1参照)を締結するなどしてポール固定手段10に取り付ける。アンテナ装置1とアンテナマウント6とを取り付けたまま、ポール固定手段10をボルト11を締めるなどしてポール8に固定する。これにより、アンテナ装置1はポール8に固定される。
5 副反射鏡、6 アンテナマウント、7、9、11 ボルト、8 ポール、10 ポール固定手段、41 正面部、42 側面部、43 包囲部、44 背面部、45 保持孔
Claims (8)
- 一次放射器と、
主反射鏡と、
副反射鏡と、
前記副反射鏡と前記主反射鏡の相対的な位置及び向きを固定的に保持する保持部と、を備え、
前記保持部は、前記一次放射器から前記副反射鏡に至る電波経路の少なくとも一部をシュラウドとして包囲する側面部を一体的に有することを特徴とするアンテナ装置。 - 前記副反射鏡と前記保持部とが一体となっていることを特徴とする請求項1に記載されるアンテナ装置。
- 前記保持部は、さらに、前記副反射鏡から前記主反射鏡に至る電波経路の少なくとも一部を包囲する包囲部を有し、
前記包囲部は、前記側面部の上端から立ち上がり、前記主反射鏡の周縁部の少なくとも一部に接続して、前記主反射鏡の位置及び向きを固定するとともに、シュラウドとしての機能を有することを特徴とする請求項1又は2に記載されるアンテナ装置。 - 当該アンテナ装置が設置された状態を側方視したときに、前記主反射鏡の前端部から後端部までの水平方向の長さを主反射鏡水平長とすると、
前記副反射鏡は、前記後端部から前記主反射鏡水平長の範囲内に収まるように配置されていることを特徴とする請求項1乃至3のいずれか1つに記載されるアンテナ装置。 - 前記一次放射器が前記保持部の内部に備え付けられることを特徴とする請求項1乃至4のいずれか1つに記載されるアンテナ装置。
- 前記一次放射器は、平坦な内壁面を有するホーンアンテナであることを特徴とする請求項1乃至5のいずれか1つに記載されるアンテナ装置。
- 前記主射鏡の開口面は楕円形であることを特徴とする請求項1乃至6のいずれか1つに記載されるアンテナ装置。
- 前記主射鏡の開口面は円形であることを特徴とする請求項1乃至6のいずれか1つに記載されるアンテナ装置。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/655,945 US9685713B2 (en) | 2012-12-28 | 2013-07-17 | Antenna device |
CN201380068840.5A CN104885300A (zh) | 2012-12-28 | 2013-07-17 | 天线装置 |
EP13869348.6A EP2940796A4 (en) | 2012-12-28 | 2013-07-17 | ANTENNA DEVICE |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2012-288918 | 2012-12-28 | ||
JP2012288918 | 2012-12-28 |
Publications (1)
Publication Number | Publication Date |
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WO2014103092A1 true WO2014103092A1 (ja) | 2014-07-03 |
Family
ID=51020235
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2013/004354 WO2014103092A1 (ja) | 2012-12-28 | 2013-07-17 | アンテナ装置 |
Country Status (4)
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US (1) | US9685713B2 (ja) |
EP (1) | EP2940796A4 (ja) |
CN (1) | CN104885300A (ja) |
WO (1) | WO2014103092A1 (ja) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
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JP7103860B2 (ja) * | 2017-06-26 | 2022-07-20 | 日本電産エレシス株式会社 | ホーンアンテナアレイ |
USD897306S1 (en) | 2020-02-19 | 2020-09-29 | ConcealFab Corporation | Radio cable shroud |
USD888004S1 (en) | 2020-02-19 | 2020-06-23 | ConcealFab Corporation | Radio cable shroud |
USD888018S1 (en) | 2020-02-19 | 2020-06-23 | ConcealFab Corporation | Radio enclosure |
USD888003S1 (en) | 2020-02-19 | 2020-06-23 | ConcealFab Corporation | Radio cable shroud |
USD890135S1 (en) | 2020-02-19 | 2020-07-14 | ConcealFab Corporation | Radio enclosure |
USD945393S1 (en) | 2020-11-19 | 2022-03-08 | ConcealFab Corporation | Modular radio enclosure |
USD936640S1 (en) | 2020-11-19 | 2021-11-23 | ConcealFab Corporation | Modular radio enclosure |
USD939467S1 (en) | 2020-11-19 | 2021-12-28 | ConcealFab Corporation | Radio support and cable shroud |
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-
2013
- 2013-07-17 WO PCT/JP2013/004354 patent/WO2014103092A1/ja active Application Filing
- 2013-07-17 US US14/655,945 patent/US9685713B2/en not_active Expired - Fee Related
- 2013-07-17 CN CN201380068840.5A patent/CN104885300A/zh active Pending
- 2013-07-17 EP EP13869348.6A patent/EP2940796A4/en not_active Withdrawn
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JPS52149627U (ja) * | 1976-05-10 | 1977-11-12 | ||
JPS5637706A (en) * | 1979-09-04 | 1981-04-11 | Nippon Telegr & Teleph Corp <Ntt> | Antenna device |
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US4521783A (en) * | 1982-09-27 | 1985-06-04 | Ford Aerospace & Communications Corporation | Offset microwave feed horn for producing focused beam having reduced sidelobe radiation |
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Also Published As
Publication number | Publication date |
---|---|
EP2940796A4 (en) | 2016-08-31 |
CN104885300A (zh) | 2015-09-02 |
EP2940796A1 (en) | 2015-11-04 |
US9685713B2 (en) | 2017-06-20 |
US20150357719A1 (en) | 2015-12-10 |
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