WO2004066443A1 - 移動体通信用アンテナ - Google Patents
移動体通信用アンテナ Download PDFInfo
- Publication number
- WO2004066443A1 WO2004066443A1 PCT/JP2003/005162 JP0305162W WO2004066443A1 WO 2004066443 A1 WO2004066443 A1 WO 2004066443A1 JP 0305162 W JP0305162 W JP 0305162W WO 2004066443 A1 WO2004066443 A1 WO 2004066443A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- mobile communication
- communication antenna
- antenna
- dielectric
- radiating element
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
- H01Q21/061—Two dimensional planar arrays
- H01Q21/065—Patch antenna array
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/24—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the orientation by switching energy from one active radiating element to another, e.g. for beam switching
- H01Q3/247—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the orientation by switching energy from one active radiating element to another, e.g. for beam switching by switching different parts of a primary active element
Definitions
- the present invention relates to a mobile communication antenna, and more particularly to a relatively small and mobile-friendly antenna for enabling voice and image information transmission using a communication satellite or the like in a mobile object such as an automobile or a ship. .
- the characteristics required for such in-vehicle and other mobile antennas used for mobile satellite communications differ depending on the application and system, but are required to have high gain over a wide range of angles, and to be small and lightweight. This is well understood by those skilled in the art. Antennas with such characteristics have been studied in many ways, including conical beam antennas and satellite tracking antennas. It cannot be achieved properly.
- the conical beam antenna has the advantages that it is omnidirectional in the horizontal plane in the elevation direction of the satellite, has a wide beam width in the vertical plane, and does not require satellite tracking.
- the satellite tracking antenna has a satellite tracking function that directs the beam toward the satellite even when the azimuth of the mobile station changes, and can achieve a higher gain than a conical beam antenna. It has the following characteristics.
- the antenna itself is rotated by using one or more modes, and the mechanical tracking that performs satellite tracking and the phase shifter switch are performed.
- this electronic tracking requires a power divider, a phase shifter, a switching circuit, and the like as compared with the mechanical tracking, so that the power supply circuit is generally complicated.
- mechanical tracking as described above tends to be mechanically complicated and bulky, and inevitably suffers from a disadvantage in terms of weight, requires a certain amount of driving force, and has the disadvantage of generating noise. All of these have disadvantages that are not desirable or desirable for such a communication mechanism, and the characteristics used in mobile communications include high gain over a wide range of angles, small size and light weight. It is difficult to seek.
- Satellite tracking antennas have a tracking function that directs the beam in the direction of the satellite, and can achieve higher gains than conical beam antennas.
- electronic tracking is smaller and lighter than mechanical tracking. It has the advantages of high-speed tracking and maintenance-free because there are no moving parts such as motors, but this type of electronic tracking has a power divider, phase shifter, or switching compared to mechanical tracking.
- the power supply circuit is generally complicated because a circuit and the like are required.
- the number of elements of the antenna increases and the number of phase shifters and switching circuits for controlling the power supply of each element increases.
- the size and diameter of the antenna has various effects on the relationship with the running conditions of the vehicle body.
- an antenna exceeding several tens of cm there is a considerable limitation on the running speed of the vehicle body. It has the disadvantage that it is likely to be caught on other objects when traveling. Disclosure of the invention
- the present invention was conceived by studying to solve the above-mentioned problems in the prior art, and is a one-point feeding type circle formed by cutting a plurality of rectangular patches as a print antenna.
- the disadvantage described in the background art is eliminated by setting the second dielectric plate to be coaxial and providing a power supply unit that can be turned on and off with respect to the feed radiating element in the first plate.
- a first dielectric plate having a plurality of feed radiating elements disposed thereon and a second dielectric plate having a parasitic radiating element disposed at positions corresponding to the feed radiators are coaxial.
- a circularly polarized patch array antenna including a plurality of elements is formed as a print antenna, and a phase shifter is required.
- beam switching is performed electrically in multiple directions, and a simple satellite tracking antenna for in-vehicle use is formed, and useful reception purposes can be achieved simply and accurately.
- An antenna according to the present invention can be obtained.
- the direction of the satellite can be determined based on information such as the force and navigation system.
- first and second dielectric plate-like members are set and held at predetermined intervals by a plurality of dielectric spacing members, they are disposed on the first and second dielectric plate-like members.
- FIG. 1 is a partially cutaway side view showing an example of a mobile communication antenna according to the present invention.
- FIG. 2 is a perspective view showing the overall configuration relationship of what is shown in FIG.
- FIG. 3 is a schematic plan view schematically showing another embodiment of the general configuration according to the present invention.
- FIG. 4 is an explanatory diagram summarizing an embodiment of a preferred feeding radiation element disposing state with respect to the dielectric plate in the present invention.
- FIG. 5 is an explanatory diagram of a receiving operation accompanying feeding of right-handed circularly polarized wave and left-handed circularly polarized wave to a feed radiating element provided on a dielectric plate-shaped member.
- FIGS. A plurality of antenna radiating elements 11 a second dielectric plate 2 on which a plurality of parasitic radiating elements 1 2 are also arranged above a first dielectric plate 1 on which Are arranged coaxially, and are integrally connected and set by a plurality of insulating connecting members 3 arranged on the peripheral side of the dielectric plates 1 and 2.
- first dielectric plate 1 and the second dielectric plate 2 are the insulating connecting members made of a plurality of synthetic resins and the like disposed on the peripheral side of the plates 1 and 2. It is assembled together by 3.
- the above-described antenna elements 11 and 12 are a single-point feed type circularly polarized antenna in which a notch 5 is formed at the corner of a rectangular patch to generate circularly polarized waves.
- the four elements were arranged as shown in Fig. 2 by rotating 90 ° so that the feed point R or L for 1 was on the inner diameter side of the dielectric plate 1 (one end of the antenna element 11). Also, as described above, the two-layer structure in which the parasitic elements 12 to 12 are arranged to improve the gain is as described above, and the beam switching is performed by using any one of the four elements 11 described above.
- the power supply By turning off the power supply, in the case of left-handed circularly polarized light, a beam having a peak in a direction shifted by 90 ° in the azimuth from the element whose power supply is turned off is formed. In the case of right-handed circularly polarized light, a beam having a peak in the opposite direction is formed.
- the feed radiating element 11 and the parasitic radiating element 12 described above are provided with cutouts 1 1a or 1 2 at opposing corners of a rectangular plate-like member so as to generate circularly polarized waves.
- This is a one-point feed circularly polarized patch antenna formed with a.
- Four elements are arranged with this antenna element rotated 90 ° so that the feed point is inside.
- the antenna is formed as a patch antenna by forming a two-layer structure of parasitic elements 12 for the purpose of improving the gain.
- the power supply to any one of the elements 11 is turned off, and in the case of left-handed circularly polarized light, the power supply to the element 11 1 is turned off.
- a beam is formed in a direction deviated by 90 ° from the azimuth angle. In this way, for example, by switching the four beams according to the azimuth of the car, it is possible to cover all azimuth angles.
- a method for determining the direction of the communication satellite for example, a calculation method based on information from a car navigation system or the like can be used.
- the antenna design is performed by numerical calculation using the moment method from the viewpoint of calculation speed, and is optimized so that the axial ratio is minimized at the target frequency.
- finite ground plane analysis is difficult with the method of moments.
- the influence of the ground plane can be examined by performing the numerical calculation by the finite element method considering the finite ground plane depending on whether the antenna is an infinite ground plane or a prototype antenna.
- the present inventors have specifically examined the radiation directivity and beam switching in a conical surface of the specific device according to the present invention, but it has been confirmed that any of the devices has preferable results.
- FIGS. 3 (A) to 3 (E) the equipment according to the present invention is separately shown in FIGS. 3 (A) to 3 (E).
- the case of using two to eight elements was also studied. That is, it has been known that even in these cases, functions or effects equivalent to those described above can be exhibited.
- the present inventors summarize the results of the study on performing preferable broadcast reception with a relatively compact configuration according to the present invention as described above, and the results are shown in FIG. 4 separately.
- the number of feed radiating elements 11 and parasitic elements 12 is appropriately selected, and the direction and position of the cutout 5 are regulated.
- the results of such a study are summarized in Figure 5.
- the number of the feed radiating elements 11 and the parasitic elements 12 is preferably about 2 to 4, and it is appropriate to arrange the elements 11 and 12 in a symmetric and uniform state. Can be effectively and appropriately achieved.
- the feeding points R and L are shown. However, only one of the feeding points R and L (for example, R) is adopted, and the other feeding point (for example, R) is used. L) is adopted when circular polarization is inverted.
- the arrangement of the feeding point for the feeding radiating element 11 in the first dielectric plate 1 or 2 is as shown in FIGS. 5 (A) to (C) separately.
- the plurality of feed radiating elements 11 or parasitic elements 12 arranged on the plate-like body 1 or 2 are typically as shown in (A) to (C) of FIG. And circularly polarized by feeding at L It is clear that the receiving operation can be obtained with
- the satellite broadcast receiving antenna prototyped by the present inventors which is mounted on a vehicle such as a vehicle, has the above-mentioned first and second dielectric plate-like bodies having a diameter of about 18 cm. Has been confirmed to be able to effectively achieve broadcast reception from satellites by adopting a configuration that uses a small antenna and is covered by a radome. It has been confirmed that it can withstand the effective reception purpose under stable conditions, with little resistance to wind pressure and other resistance during running of vehicles and the like. Relatively small and adopts an arc to reduce resistance during running of vehicles, etc. Is clear. Industrial applicability
- the present invention despite being able to appropriately achieve broadcast reception using an artificial satellite or the like, it is small and lightweight and easily and accurately to a moving body such as an automobile or a hull. It is clear that the equipment can be installed and used effectively and appropriately, and the equipment and configuration are simpler than the conventional mechanical tracking and electronic tracking methods, and the above characteristics can be fully exhibited. This is an invention having a great effect.
Landscapes
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Waveguide Aerials (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004567147A JPWO2004066443A1 (ja) | 2003-01-23 | 2003-04-23 | 移動体通信用アンテナ |
AU2003227356A AU2003227356A1 (en) | 2003-01-23 | 2003-04-23 | Mobile communication antenna |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003014301 | 2003-01-23 | ||
JP2003-14301 | 2003-01-23 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004066443A1 true WO2004066443A1 (ja) | 2004-08-05 |
Family
ID=32767391
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2003/005162 WO2004066443A1 (ja) | 2003-01-23 | 2003-04-23 | 移動体通信用アンテナ |
Country Status (3)
Country | Link |
---|---|
JP (1) | JPWO2004066443A1 (ja) |
AU (1) | AU2003227356A1 (ja) |
WO (1) | WO2004066443A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2018505624A (ja) * | 2015-02-17 | 2018-02-22 | ローベルト ボッシュ ゲゼルシャフト ミット ベシュレンクテル ハフツング | アンテナ装置およびアンテナ装置を製造するための方法 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0518110U (ja) * | 1991-08-06 | 1993-03-05 | 新日本無線株式会社 | マイクロ波用アンテナ |
JPH09205318A (ja) * | 1996-01-29 | 1997-08-05 | Furukawa Electric Co Ltd:The | マイクロストリップアンテナ |
JP2001332929A (ja) * | 2000-03-17 | 2001-11-30 | Tdk Corp | 円偏波パッチアンテナ装置 |
JP3255048B2 (ja) * | 1996-11-21 | 2002-02-12 | 三菱電機株式会社 | 車載機のアンテナ装置、車載機および路車間通信システム |
-
2003
- 2003-04-23 JP JP2004567147A patent/JPWO2004066443A1/ja not_active Withdrawn
- 2003-04-23 AU AU2003227356A patent/AU2003227356A1/en not_active Abandoned
- 2003-04-23 WO PCT/JP2003/005162 patent/WO2004066443A1/ja active Application Filing
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0518110U (ja) * | 1991-08-06 | 1993-03-05 | 新日本無線株式会社 | マイクロ波用アンテナ |
JPH09205318A (ja) * | 1996-01-29 | 1997-08-05 | Furukawa Electric Co Ltd:The | マイクロストリップアンテナ |
JP3255048B2 (ja) * | 1996-11-21 | 2002-02-12 | 三菱電機株式会社 | 車載機のアンテナ装置、車載機および路車間通信システム |
JP2001332929A (ja) * | 2000-03-17 | 2001-11-30 | Tdk Corp | 円偏波パッチアンテナ装置 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2018505624A (ja) * | 2015-02-17 | 2018-02-22 | ローベルト ボッシュ ゲゼルシャフト ミット ベシュレンクテル ハフツング | アンテナ装置およびアンテナ装置を製造するための方法 |
US10468764B2 (en) | 2015-02-17 | 2019-11-05 | Robert Bosch Gmbh | Antenna system and method for manufacturing an antenna system |
Also Published As
Publication number | Publication date |
---|---|
JPWO2004066443A1 (ja) | 2006-09-28 |
AU2003227356A1 (en) | 2004-08-13 |
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