WO2009123132A1 - Antenne - Google Patents

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Publication number
WO2009123132A1
WO2009123132A1 PCT/JP2009/056526 JP2009056526W WO2009123132A1 WO 2009123132 A1 WO2009123132 A1 WO 2009123132A1 JP 2009056526 W JP2009056526 W JP 2009056526W WO 2009123132 A1 WO2009123132 A1 WO 2009123132A1
Authority
WO
WIPO (PCT)
Prior art keywords
reflector
antenna
cover
radiator
flat plate
Prior art date
Application number
PCT/JP2009/056526
Other languages
English (en)
Japanese (ja)
Inventor
徹 坂本
裕 小澤
Original Assignee
マスプロ電工株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by マスプロ電工株式会社 filed Critical マスプロ電工株式会社
Priority to JP2010505907A priority Critical patent/JPWO2009123132A1/ja
Priority to CN2009801073543A priority patent/CN101960670A/zh
Publication of WO2009123132A1 publication Critical patent/WO2009123132A1/fr

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    • 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
    • H01Q19/12—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 wherein the surfaces are concave
    • H01Q19/13—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 wherein the surfaces are concave the primary radiating source being a single radiating element, e.g. a dipole, a slot, a waveguide termination
    • 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
    • H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
    • H01Q9/28—Conical, cylindrical, cage, strip, gauze, or like elements having an extended radiating surface; Elements comprising two conical surfaces having collinear axes and adjacent apices and fed by two-conductor transmission lines

Definitions

  • the present invention relates to an antenna including a radiator and a reflector.
  • an antenna is proposed in which an insulating material and several metal foil antenna elements formed in a thin film shape with a conductive material are attached to the insulator. (For example, see Patent Document 1)
  • the antenna shown in the past is the one in which the length and shape of each element determined by the reception wavelength is replaced with a metal foil antenna element, like a general Yagi-Uda type antenna, in order to obtain desired characteristics. It cannot be changed greatly.
  • the antenna is made up of only a reflector and a radiator, and the antenna is miniaturized and an antenna that can be easily mounted on a veranda or antenna post is used, its electrical characteristics use a conventional elongated conductor rod. In order to obtain the same electrical characteristics as the antenna, the outer shape of the antenna remains the same size.
  • the antenna is composed of a metal foil antenna element formed on the insulating material, the antenna configuration is complicated in order to further improve the characteristics by making the metal wave antenna elements constituting the reflector multi-stage. As a result, there was a problem that the cost increased.
  • an object of the present invention is to propose an antenna having a simple configuration and good electrical characteristics. Another object is to propose an antenna having good characteristics over a wide band.
  • Another object is to provide a small but high-performance antenna. Another object is to provide a simple and safe antenna for installation work. Another object is to provide an antenna that is highly reliable against vibrations caused by wind and the like.
  • Another object is to provide an antenna with a simple structure and easy assembly.
  • the radiator and the reflector are arranged along an arrival direction of a radio wave received by the antenna.
  • the reflector is a rectangular flat plate extending along the polarization direction of the radio wave received by the antenna, and one or both of the end portions along the longitudinal direction of the flat plate are directed toward the radiator. The shape is bent.
  • the reflector has a path connecting one side to the other of both short sides of the flat plate as a bent portion, and two reflecting surfaces separated by using the bent portion as a boundary, A predetermined opening angle is formed in a cross section along the direction intersecting the longitudinal direction of the reflector.
  • At least one of the end portions along the longitudinal direction of the flat plate is directed from the end portion in a direction intersecting with the polarization direction of the radio wave received by the antenna.
  • One or more alignment pieces projecting in this manner are provided along the longitudinal direction of the flat plate.
  • the antenna is configured to receive radio waves in the UHF band.
  • the radiator and the reflector are arranged along an arrival direction of a radio wave received by the antenna. Consists of a rectangular flat plate extending along the polarization direction of the radio wave received by the antenna, and either or both of the end portions along the longitudinal direction of the flat plate are bent toward the radiator. It has a different shape. As a result, the vertical dimension can be reduced. Moreover, an antenna having excellent electrical characteristics can be provided even if the vertical dimension is reduced.
  • either one or both of the two reflecting surfaces divided with the bent portion as a boundary are polarized waves of radio waves received by the antenna.
  • One or more slits extending along the direction intersecting the direction are formed. Therefore, the GAIN and VSWR on the low band side are improved for the antenna having a reflector without a slit, and the effectiveness of improving the electrical characteristics of the slit is recognized.
  • At least one of the end portions along the longitudinal direction of the flat plate has a polarization direction of a radio wave received by the antenna from the end portion.
  • One or more alignment pieces projecting in the intersecting direction are provided along the longitudinal direction of the flat plate. Therefore, VSWR can be improved without causing a decrease in GAIN, and the effectiveness of improving the electrical characteristics of the matching piece is recognized.
  • the antenna is configured to receive UHF radio waves. Therefore, even if it is small, good electrical characteristics can be obtained over the entire band, so that it is possible to provide a suitable antenna that can be used for receiving digital terrestrial broadcasting.
  • FIG. 2A is a top view of the antenna body constituting the antenna
  • FIG. 2B is a side view of the antenna body as seen from the line AA in FIG. 2A
  • FIG. 2C is a front view of the antenna body.
  • 3A is a top view of a reflector constituting the antenna
  • FIG. 3B is a front view of the reflector
  • FIG. 3C is a bottom view of the reflector
  • FIG. 3D is a view of B in FIG. 3B. It is sectional drawing of this reflector seen from the -B line
  • 4A is a front view of the cover when the reflector is accommodated
  • FIG. 4B is a front view of the cover when the reflector and the signal processing unit are accommodated, and FIG. It is sectional drawing of a cover seen from C line.
  • FIG. 5A is a perspective view of a cover for explaining an embodiment in which the reflector is housed in the cover, and is a perspective view of the cover partially broken as seen from the line DD in FIG. 4B.
  • 5B is a cross-sectional view of the cover as seen from the line DD in FIG. 4B.
  • 6A is an explanatory view of a modification in which the reflector constituting the antenna is accommodated in the cover, and is a perspective view of the cover similar to FIG. 5A, and FIG. 6B is the case in which the reflector constituting the antenna is accommodated in the cover.
  • FIG. 5A is a perspective view of a cover for explaining an embodiment in which the reflector is housed in the cover, and is a perspective view of the cover partially broken as seen from the line DD in FIG. 4B.
  • 5B
  • FIG. 6 is an explanatory view of a modified example, and is a cross-sectional view similar to FIG. 5B.
  • 7A is a cross-sectional view of the reflector and the cover before the reflector is housed in the cover, as viewed from line EE in FIG. 1, and
  • FIG. 7B is a reflection, as viewed from line EE in FIG. It is sectional drawing of the cover with which the apparatus and the reflector were mounted
  • FIG. 8A is a perspective view showing an example of an antenna body that constitutes an antenna according to the present invention, and is a perspective view of an antenna body in which a slit and a matching piece are provided in a reflector.
  • FIG. 8C is a perspective view showing an example of an antenna main body constituting such an antenna, and is a perspective view of an antenna main body in which a slit is provided in the reflector but no matching piece is provided, and FIG. 8C is related to the present invention.
  • It is a perspective view which shows the example of the antenna main body which comprises an antenna, Comprising: It is a perspective view of the antenna main body in which neither a slit nor a matching piece is provided in the reflector. It is a figure which shows each electrical characteristic when a reflector has a slit, and when there is no slit. It is a figure which shows each electrical characteristic when a matching piece exists in a reflector, and when it does not exist. It is a figure which shows the electrical property about the reflector in which the matching piece was provided in the mutually different pattern.
  • FIG. 1 denotes an antenna according to the present invention.
  • the antenna 1 in this embodiment is at least a radiator 10, an antenna body 2 composed of a reflector 20 located behind the radiator 10, and a resin casing for housing the antenna body 2.
  • the cover 5 is located on the rear side, and the front cover 6 is located on the front side of the antenna body 2.
  • the cover 5 is a housing body according to the claims.
  • the radiator 10 is a dipole antenna composed of a pair of power feeding elements 15 and 15 formed by punching and molding a thin plate-like conductive material with a mold or the like.
  • the feeding element 15 is formed in a substantially rectangular shape, and includes a feeding point 11a at a substantially intermediate position on the base 11 side. Further, a concave portion 12 is formed at a middle position of the side opposite to the base portion 11 by cutting the side into a concave shape toward the base portion 11. Further, as shown in the figure, a plurality of radiating element mounting holes 17 are formed on the periphery of the power feeding element 15, and radiating element mounting bosses formed in the cover 5 described later are formed in the radiating element mounting holes 17. If 57 is inserted and mounted, the radiator 10 is configured by arranging the sides of the radiating element 15 on the base 11 side in parallel while maintaining a predetermined distance and storing them in the cover.
  • the power supply points 11a and 11a of the radiator 10 configured as described above include, for example, a balance-unbalance conversion unit formed by winding a polyurethane wire around a ferrite core. 18 is connected to one end of the coaxial cable 19, and the other end of the coaxial cable 19 is an inner side of the output terminal 59 formed on the cover 5, which will be described later, protruding into the cover 5. By being connected to the terminal portion 59a, the signal received by the radiator 10 is configured to be taken out from the output terminal 59 to the outside of the cover 5.
  • radiator 10 will be described.
  • the radiator dimensions are well illustrated in FIGS. 2A and 2C.
  • the specific dimensions of the antenna according to the embodiment of the present invention described below are examples of antenna design used for terrestrial digital broadcasting performed using, for example, the UHF band.
  • the radiating element 15 is formed by punching a conductive thin plate into a rectangular shape having a horizontal width (vertical dimension in FIG. 2C) of 136 mm and a vertical width (horizontal dimension in FIG. 2C) of 54 mm.
  • a feeding point 11a is formed on the base 11 side.
  • a concave portion 12 having a lateral width (vertical dimension in FIG. 2C) of 37 mm and a longitudinal width (horizontal dimension in FIG. 2C) of 20 mm is provided at an intermediate position on the side opposite to the base 11.
  • the radiator 10 is comprised by arrange
  • the reflector 20 includes a rectangular flat plate extending along the polarization direction of the radio wave received by the antenna 1, and each end portion along the longitudinal direction of the flat plate faces the radiator 10. It has a bent shape.
  • a path connecting one side of both short sides of the flat plate to the other is the bent portion 21, and this folding
  • the two reflecting surfaces 22 and 23 divided with the curved portion 21 as a boundary are bent so as to form a predetermined opening angle ⁇ in a cross section along the direction intersecting the longitudinal direction of the reflector 20.
  • the reflector 20 has a substantially V-shaped cross section along the direction intersecting the longitudinal direction with the opening directed in the direction of arrival of radio waves.
  • a plurality of slits 25 extending along the direction intersecting with the polarization direction of the radio wave received by the antenna 1 are formed on the reflection surfaces 22 and 23 separated by the bent portion 21 as a boundary.
  • At least one of the end portions along the longitudinal direction of the flat plate (in this embodiment, only the end portion 22a of the upper reflecting surface 22) is received by the antenna 1 from the end portion.
  • One or more matching pieces 28 projecting in the direction intersecting with the polarization direction are provided along the longitudinal direction of the flat plate (in the present embodiment, at two predetermined positions with a predetermined interval). .
  • the bottom of the bent portion 21 of the reflector 20 forms a flat surface 24.
  • Through holes 21b, 21b for inserting front panel 6 mounting bosses 51b, 51b, and through holes for inserting signal processing circuit mounting bosses 51c, 51c described later. 21c and 21c are formed, respectively.
  • a hole 23a for projecting the internal terminal portion 59a and a hole 23b for projecting the internal terminal portion 58a are formed. Yes.
  • the reflector 20 formed in this way is accommodated in the cover 5 constituting the resin casing.
  • the substantially rectangular V-shaped cross section having the predetermined opening angle ⁇ toward the radiator 10 on both long sides of the flat plate-like conductive material Since it is bent so as to be shaped, the vertical dimension can be reduced.
  • FIGS. 3A, 3B and 3D The dimensions of each part are well illustrated in FIGS. 3A, 3B and 3D.
  • the vertical width of the upper reflective surface is 45 mm
  • the vertical width of the flat surface 24 at the bent portion 21 is 6 mm
  • the vertical width of the lower reflective surface is 45 mm
  • the opening dimension formed by the tips of the upper reflective surface 22 and the lower reflective surface 23 is 40 mm.
  • the vertical dimension of the thin plate is determined so that the length of the alignment piece 28 provided to protrude from the tip 22a of the upper reflecting surface 22 is 30 mm.
  • the slit 25 in the embodiment according to the present invention is provided in each of the upper reflecting surface 22 and the lower reflecting surface 23, and the reflecting surface is penetrated in a rectangular shape with a large width of 35 mm and a width of 5 mm.
  • a plurality of slits 25 are formed such that the center of the slit 25 is positioned on the lateral central axis of the reflector 20 and the center lines of the slit 25 are arranged in parallel at an interval of 10 mm from each other. Yes.
  • the alignment piece 28 in the embodiment according to the present invention is integrally formed in a strip shape having a vertical width of 30 mm and a horizontal width of 5 mm.
  • the alignment piece 28 is the front end of the upper reflecting surface 22.
  • the alignment piece 28 is integrally provided so that the center line of the alignment piece 28 is located at a position 95 mm away from the center line CL of the upper reflecting surface 22 to the left and right.
  • This cover 5 is formed by molding a resin material with a mold or the like, and is formed in a substantially V-shaped cross section having an opening 30 a in front of the reflector 20 in accordance with the shape of the reflector 20. And it is comprised so that it may become the box in which the space 30 which accommodates the said reflector 20 at least was formed in the inside.
  • a contact surface 34 for attaching and positioning the reflector 20 is formed in the rear part of the cover 5 so as to face the plane 24 of the reflector 20.
  • the contact surface 34 has a reflector mounting boss 51 a at a position facing the mounting hole 21 a formed in the flat surface 24 of the reflector 20, and the through hole 21 b formed in the flat surface 24 of the reflector 20.
  • Front panel 6 mounting bosses 51b, 51b provided so as to protrude forward from the abutting surface 34 at positions opposed to 21b are formed in the through holes 21c, 21c formed in the flat surface 24 of the reflector 20.
  • mounting bosses 51c and 51c of the signal processing circuit 40 described later are formed, respectively.
  • a plurality of receiving members fitted to the front inner end of the slit 25 formed in the reflector 20 are formed on the inner wall of the cover 5 facing the upper reflecting surface 22 and the lower reflecting surface 23 of the reflector 20.
  • a plurality of projecting pieces 36 are formed to be fitted to the tip portions of the part 35 and the upper reflecting surface 22 and the lower reflecting surface 23 constituting the reflector 20.
  • the protruding piece 36 is the locking means described in the claims.
  • the upper reflecting surface 22 and the tip end portion of the lower reflecting surface 23 fitted to the projecting piece 36 are the locking portions described in the claims.
  • a radiating element mounting boss 57 is formed at a position facing the formed radiating element mounting hole 17.
  • a locking claw 33 for holding the coaxial cable 19 is formed at an intermediate portion inside the lower surface of the cover 5.
  • an output terminal 59 for outputting a reception signal transmitted to the coaxial cable 19 is provided on the outer side of the lower surface of the cover 5.
  • the portion of the output terminal 59 that appears in the space 30 of the cover 5 is the internal terminal portion 59a, to which the central conductor and the external conductor at the other end of the coaxial cable 19 are connected.
  • the cover 5 thus configured houses the reflector 20, and after the housing of the reflector 20 is completed, the radiating elements 15 and 15 are assembled so as to close the opening 30a. Attached.
  • the pair of radiating elements 15 are arranged at a predetermined interval from each other to form the radiator 10, and the radiator 10 and the reflector 20 are spaced from each other at a predetermined interval.
  • the antenna body 2 is configured by being arranged.
  • the distance between the radiator 10 and the reflector 20 is 100 mm between the radiator 10 and the plane 24 of the reflector 20.
  • the antenna body 2 is configured by this predetermined dimension.
  • the front panel 6 is attached to the front side of the cover 5 and, for example, a screw is inserted from the back of the cover 5. Assembling of the antenna 1 is completed by fixing the cover 5 and the front panel 6 using 9.
  • FIGS. 5A-5B, 6A-6B, and 7A-7B a method of locking the cover 5 and the reflector 20 will be described in detail with reference to FIGS. 5A-5B, 6A-6B, and 7A-7B. First, the embodiment shown in FIGS. 5A-5B will be described.
  • the reflector 20 is mounted such that the flat surface 24 formed in the bent portion 21 of the reflector 20 abuts against a contact surface 34 formed in the inner portion of the space 30 of the cover 5.
  • the reflector mounting boss 51a protruding from the contact surface 34 passes through the mounting hole 21 formed in the flat surface 24 of the reflector 20 and protrudes forward from the contact surface 34.
  • the front panel 6 mounting bosses 51b and 51b provided in this way are inserted through the through holes 21b and 21b formed in the flat surface 24 of the reflector 20, and the signal processing circuit mounting bosses 51c and 51c are reflected. It attaches so that the through-holes 21c and 21c formed in the plane 24 of the container 20 may be inserted.
  • the reflector 20 is positioned and stored at a predetermined position in the cover 5.
  • the reflector 20 can be firmly fixed to the cover 5 by crushing the reflector mounting boss 51a so as to be deformed by applying heat or the like. Simultaneously with this mounting operation, as shown in FIGS. 5A-5B, the receiving portion 35 formed on the upper and lower inner walls of the cover 5 is fitted to the front inner end of the slit 25 formed in the reflector 20. At the same time, the projecting pieces 36 formed on the upper and lower inner walls of the cover 5 are engaged with the engaging portions at the respective tip portions of the upper reflecting surface 22 and the lower reflecting surface 23 constituting the reflector 20.
  • the receiving portion 35 is formed so as to project into the space 30 integrally with the inner wall of the cover 5, and receives the abutting front end of the slit 25.
  • a portion 35b and a projection 35a that is inserted in the upper portion or the lower portion of the receiving portion 35b and passes through the slit 25 are provided.
  • the projection 35a, the receiving portion 35b, and the inner wall of the cover form a concave receiving portion 35, and the front inner end of the slit 25 is fitted into this concave portion.
  • the projecting piece 36 is formed so as to protrude slightly in the space 30 integrally with the inner wall of the cover 5, and at the final stage of mounting the reflector 20, the upper reflecting surface 22 and the lower reflecting surface are formed.
  • the reflector 20 is attached to the cover 5 by getting over the protruding piece 36 while the tip portions of the 23 are pushed inward.
  • the tip portions of the upper reflecting surface 22 and the lower reflecting surface 23 are attached so as to press the inner wall of the cover by the biasing force, and face the projecting piece 36 and the projecting piece 36.
  • the engaging portions at the tip portions of the upper and lower reflecting surfaces are fitted to each other, so that the reflector 20 is securely attached to the inside of the cover 5.
  • the reflector 20 in the embodiment of the present invention should have an opening angle ⁇ of 45 ° in order to obtain good characteristics as an antenna.
  • an opening angle is formed so as to be slightly larger than a predetermined angle ⁇ , and the reflector 20 is accommodated in the cover 5 and fitted into the protrusion 36.
  • the reflector 20 may be configured to have an opening angle ⁇ of 45 °.
  • the reflector 20 is more firmly assembled to the cover 5 by its urging force, and the opening angle ⁇ of the reflector 20 made of a thin plate is made substantially constant ⁇ by the more rigid cover 5.
  • products with little variation in electrical characteristics can be provided for each product.
  • FIGS. 7A-7B The assembled state at this time is shown in FIGS. 7A-7B.
  • the dimension of the opening end of the reflector 20 is W1. > 40.5 mm.
  • the dimension from the center line CL to the tip of the alignment piece 28 is H.
  • a cushioning material may be interposed between the tip portions of the upper reflection surface 22 and the external reflection surface 23 and the inner wall of the cover 5.
  • the reflector 20 When the reflector 20 is housed in the cover 5, in the embodiment shown in FIGS. 5A-5B, at least all of the outer surface of the tip of the upper reflective surface 22 and the lower reflective surface 23 of the reflector 20 are inside the cover 5. In addition, the engaging portion of the front end of the surface abuts on the surface wall and the projecting piece 36 is fitted.
  • the upper reflecting surface 22 of the reflector 20 is excluded, except for the locking portion disposed opposite to the protruding piece 36 as the locking means provided on the inner surface of the space 30.
  • the outer surface of the lower reflecting surface 22 and the inner wall of the cover 5 are configured to be attached to the inner surface of the space 30 so as to have a predetermined gap.
  • the tip portions of the upper reflecting surface 22 and the lower reflecting surface 23 protrude outward from the upper reflecting surface 22 and the lower reflecting surface 23 toward the projecting piece 36 at positions facing the projecting pieces 36.
  • a protruding piece 26 is provided as a locking portion formed in the.
  • the reflector 20 is housed in the cover 5 with a predetermined shape by locking the protruding piece 26 to the protruding piece 36.
  • the antenna body 2 particularly the reflector 20 is vibrated by wind or the like, the upper reflection surface 22, the external reflection surface 23, and the inner wall of the cover 5 are not covered by the protruding piece 26. Since there is no contact except for the front end, the contact portion is extremely small, and an antenna that generates less abnormal noise against vibration can be provided.
  • the antenna including the reflector 20 provided with the slit 25 is improved in the GAIN and VSWR on the low frequency side as compared with the antenna including the reflector without the slit, The effectiveness of the slit 25 is recognized.
  • the slit 25 of the embodiment of the present invention has a horizontal width of 5 mm, a vertical width of 290 mm in width and 45 mm in height, respectively on the upper reflection surface 22 and the lower reflection surface 23.
  • the slits having a width of 35 mm are arranged in parallel so that the distance between the central axes in the longitudinal direction is 10 mm.
  • the data shown in FIG. 10 includes a reflector in which two matching pieces 28 are provided at predetermined positions on the upper reflecting surface 22, a reflector in which two matching pieces 28 are provided on each of the upper reflecting surface 22 and the lower reflecting surface 23, and a matching piece.
  • This is a comparison of antennas with reflectors without any other.
  • the one with the reflector without the matching piece 28 has the worst VSWR characteristic, and the VSWR improves in the order of two matching pieces on the upper side and two matching pieces on the upper and lower sides. .
  • the one without the matching piece 28 and the one with two matching pieces on the upper side show almost the same GAIN characteristics, but the one with two matching pieces above and below shows a decrease in GAIN.
  • the antenna of the embodiment of the present invention by providing at least two matching pieces 28 on the upper reflection surface 22 constituting the reflector 20, the GAIN is not lowered. It can be seen that the VSWR can be improved, and the effectiveness of the matching piece 28 is recognized.
  • the alignment piece 28 is formed in a size having a vertical width of 30 mm and a horizontal width of 5 mm as well shown in FIGS. 3A to 3D.
  • the alignment piece 28 is integrally provided so that the center line of the alignment piece 28 is located at the tip of the upper reflection surface 22 and at a position 95 mm away from the lateral center line of the upper reflection surface 22. ing.
  • FIGS. 3B to 3C different embodiments of the antenna according to the present invention will be described with reference to FIGS. 3B to 3C.
  • the difference between the embodiment shown in FIG. 3B and the embodiment shown in FIG. 3A is that the antenna is provided with a signal processing unit indicated by 40 in FIG. 3B.
  • the signal processing unit 40 is, for example, an amplifying circuit for amplifying a signal received by the radiator 10 to a predetermined level, or a signal from an external antenna such as a satellite antenna.
  • a signal processing circuit (not shown in the figure) including a mixing circuit for mixing with the above signal is accommodated in a shield case 44 formed of, for example, a conductive material.
  • the signal processing unit 40 includes, for example, an amplification circuit for amplifying a signal received by the radiator 10 to a predetermined level, and a terrestrial digital wave signal received by the antenna from an external antenna such as a satellite antenna.
  • a signal processing circuit (not shown) including a mixing circuit for mixing is housed in a shield case 44 formed of, for example, a conductive material.
  • the shield case 44 is a box having a shielding property composed of upper and lower surfaces and side walls surrounding the four sides so that the vertical direction is thin.
  • the upper reflection surface 22 and the lower reflection surface 23 cause the reflection to occur.
  • At least one side wall 45 of the signal processing unit 40 is directed to the front side of the antenna at an intermediate portion of the space formed on the front side of the device 20, and a part or all of the signal processing unit 40 is overlapped with the space. It is arranged to do.
  • the shield case 44 is provided with a mounting leg provided with a through hole in the center on the side wall opposite to the side wall 45 and projecting on both sides from the side wall.
  • the mounting legs are applied to the mounting bosses 51 and 51, and the screws 41 and 41 are attached to the mounting bosses 51c and 51c from the through holes, whereby the mounting to the cover 5 is performed.
  • 3B is an input coaxial cable for transmitting a signal received by the radiator 10, and 42 is a coaxial cable for outputting a signal processed signal such as amplification and mixing from an output terminal 59. is there.
  • Reference numeral 43 denotes a coaxial cable for inputting a signal input from an external input terminal via an external antenna such as a satellite antenna to a signal processing circuit, and one is an internal input indicated by 58a in the figure. The other end is connected to a signal processing circuit.
  • FIG. 11 shows a comparison between the electrical characteristics in the absence of the signal processing unit 40 and the electrical characteristics due to the difference in the mounting direction of the signal processing unit 40.
  • the signal processing unit 40 is attached in the direction in which the side wall 45 of the signal processing unit 40, that is, the surface in the thin direction faces the front of the antenna.
  • the upper surface or the lower surface of 40 that is, the case where the longitudinal surface is attached facing the front of the antenna.
  • the signal processing unit 40 is overlapped in the reflector 20 when the thin surface is attached to the front of the antenna. It can be seen that even with the arrangement, the GAIN, the VSWR, and the front-to-back ratio have substantially the same characteristics with only slight deterioration.
  • the VSWR is improved on the low band side, but the GAIN is decreased and the front / rear ratio is deteriorated. I understand.
  • At least one of the signal processing units 40 in the thin direction is provided at an intermediate portion of the space formed on the front side of the reflector 20 by the upper reflecting surface 22 and the lower reflecting surface 23.
  • the present invention is not limited to the above-described embodiment, and can be implemented by appropriately changing the configuration of each part without departing from the spirit of the present invention, as exemplified below.
  • the reflector 20 is optimized by using the slit 25 and the matching piece 28 has been shown.
  • it may be configured by appropriately combining a thing (reflector 61), a thing without the slit 25 or the matching piece 28 (reflector 63), or the like.
  • the slit 25 formed in the reflector 20 is not particularly limited with respect to the shape, size, number, positional relationship of the slits 25 and the like as long as the effectiveness is recognized.
  • the opening angle ⁇ formed in the reflecting surfaces 22 and 23 of the reflector 20 is determined so that the lengths in the vertical direction and the front-back direction of the reflector 20 can be shortened to some extent. Any angle (30 to 60 degrees in this embodiment) may be used.
  • the matching pieces 28 provided on the reflecting surface 22 of the reflector 20 have a shape, size, number, positional relationship of the matching pieces 28, etc., as long as the effectiveness thereof is recognized. Is not particularly limited.
  • the reflector 20 is made into the shape by which either one or both of the edge parts along the longitudinal direction of a flat body were bent toward the radiator 10, and the opening centering on a bending part has it.
  • it may have a shape other than the substantially V-shape described above.
  • it is conceivable to have a substantially C shape, a substantially U shape, a substantially W shape, or the like.

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Abstract

La présente invention concerne une antenne équipée d'au moins un radiateur et un réflecteur, placés face à la direction dans laquelle arrivent les ondes radio reçues par l'antenne. Le réflecteur est composé d'un corps planaire rectangulaire qui se prolonge dans la direction de la polarisation des ondes radio reçues par l'antenne. Les extrémités du corps planaire dans la direction de la longueur sont pliées vers le radiateur.
PCT/JP2009/056526 2008-03-31 2009-03-30 Antenne WO2009123132A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2010505907A JPWO2009123132A1 (ja) 2008-03-31 2009-03-30 アンテナ
CN2009801073543A CN101960670A (zh) 2008-03-31 2009-03-30 天线

Applications Claiming Priority (2)

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JP2008091998 2008-03-31
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102969561A (zh) * 2012-11-12 2013-03-13 西安开容电子技术有限责任公司 一种无源双锥测试天线的设计方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8882270B2 (en) 2006-01-20 2014-11-11 Clarity Medical Systems, Inc. Apparatus and method for operating a real time large diopter range sequential wavefront sensor
JP6437881B2 (ja) * 2015-05-25 2018-12-12 タイコエレクトロニクスジャパン合同会社 アンテナ

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006211643A (ja) * 2004-12-28 2006-08-10 Dx Antenna Co Ltd アンテナ
JP2007194915A (ja) * 2006-01-19 2007-08-02 Sony Corp アンテナ装置、アンテナ反射器、並びにアンテナを内蔵する無線通信機器

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006211643A (ja) * 2004-12-28 2006-08-10 Dx Antenna Co Ltd アンテナ
JP2007194915A (ja) * 2006-01-19 2007-08-02 Sony Corp アンテナ装置、アンテナ反射器、並びにアンテナを内蔵する無線通信機器

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102969561A (zh) * 2012-11-12 2013-03-13 西安开容电子技术有限责任公司 一种无源双锥测试天线的设计方法

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