WO2008050869A1 - Guide d'ondes et dispositif d'antenne - Google Patents

Guide d'ondes et dispositif d'antenne Download PDF

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Publication number
WO2008050869A1
WO2008050869A1 PCT/JP2007/070940 JP2007070940W WO2008050869A1 WO 2008050869 A1 WO2008050869 A1 WO 2008050869A1 JP 2007070940 W JP2007070940 W JP 2007070940W WO 2008050869 A1 WO2008050869 A1 WO 2008050869A1
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WIPO (PCT)
Prior art keywords
antenna
support rod
waveguide
director
annular elements
Prior art date
Application number
PCT/JP2007/070940
Other languages
English (en)
Japanese (ja)
Inventor
Takashi Hashiyama
Original Assignee
Masprodenkoh Kabushikikaisha
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 Masprodenkoh Kabushikikaisha filed Critical Masprodenkoh Kabushikikaisha
Publication of WO2008050869A1 publication Critical patent/WO2008050869A1/fr

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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
    • H01Q19/28—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 a secondary device in the form of two or more substantially straight conductive elements
    • H01Q19/30—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 a secondary device in the form of two or more substantially straight conductive elements the primary active element being centre-fed and substantially straight, e.g. Yagi antenna
    • 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

Definitions

  • the present invention relates to a waveguide suitable for an antenna device that receives a television broadcast radio wave, particularly a UHF band television broadcast radio wave, and an antenna device including the waveguide.
  • a so-called Yagi Ichida antenna is known as a home antenna device that receives TV broadcast radio waves in the VHF band and the UHF band.
  • this type of antenna device includes a radiator formed with a half-wavelength length of a frequency component to be transmitted and received, a waveguide composed of an element formed shorter than the radiator, and a radiator.
  • a reflector made of an element formed longer than the launcher, and an antenna support rod that supports these parts in parallel with each other in the order of the director, radiator, and reflector. It has directivity to receive radio waves coming from the front.
  • the director usually has a plurality of through holes formed in the direction perpendicular to the central axis of the antenna support rod, and each through hole has a
  • a linear element linear element
  • a plurality of antenna elements can be provided at predetermined intervals in the axial direction of the antenna support rod.
  • Patent Document 1 Japanese Patent Laid-Open No. 2004-104702
  • the frequency band is wide as in the case of UHF band television broadcasting, and when the radio wave is received, the reactance is within the frequency band used by the antenna device.
  • the amount of change in the component increases, and the antenna characteristics (gain, etc.) decrease near the minimum frequency or the maximum frequency in the operating frequency band.
  • the present invention has been made in view of these problems, and can realize good antenna characteristics in a wide frequency band, and can easily and safely assemble and mount an antenna device. It is an object of the present invention to provide a device and an antenna device provided with the director.
  • the invention of the first aspect made to achieve such an object is a waveguide provided in an antenna support rod together with a radiator, wherein a pair or a plurality of pairs are formed by forming a conductive material in a loop shape.
  • each annular element is substantially the same as a plane in which an opening surface of a loop is orthogonal to a central axis of the antenna support rod via the support base. It arrange
  • each of the annular elements is formed in an elongated shape having straight portions parallel to each other, and the support base includes two pairs. Are arranged in the same space where the linear portion of each annular element extends outward from the antenna support rod and is blocked by a plane passing through the central axis of the antenna support rod. Each annular element is arranged so that the linear portions of the two annular elements placed are substantially parallel.
  • each of the annular elements has a substantially rectangular shape.
  • each of the annular elements is formed integrally with the support base.
  • each of the annular elements conducts both ends of a conductive material formed in a loop shape via a fixing means having conductivity.
  • the base part of the annular element including the connection part connected by the fixing means is formed integrally with the support base.
  • the invention of the seventh aspect is the antenna device in which at least the radiator and the director are supported on the antenna support rod, and the waveguide according to the first to sixth aspects is used as a director.
  • the waveguide according to the first to sixth aspects is used as a director.
  • One or more are provided.
  • the invention of an eighth aspect is that, in the antenna device according to the above aspect, the radiator includes two loop antennas arranged in parallel to each other with a distance from the antenna support rod.
  • the loop antenna is arranged so that the opening surface substantially coincides with a plane perpendicular to the central axis of the antenna support rod, and both ends of each loop antenna are connected to each other via phase adjusting means! /, It is characterized by that.
  • the invention of a ninth aspect is the above-described antenna device, wherein a reflector is provided on a side opposite to the director across the radiator in the antenna support rod.
  • the reflector is made of a plate material formed in a substantially rectangular shape.
  • a pair or a plurality of pairs of annular elements and each of these annular elements are arranged across a plane in which the pair of annular elements pass through the central axis of the antenna support rod.
  • the area of the element with respect to the direction of arrival of the radio wave can be increased and the waveguide can be increased.
  • the operating frequency band of the device can be widened.
  • the annular element has a shape in which the two linear elements are bent, the ends of the linear elements are folded back, and the ends of the linear elements are joined to each other.
  • the overall length can be made shorter than that of the linear element.
  • the overall length can be shortened and the antenna device can be downsized as compared with the conventional one.
  • the waveguide according to the present invention is configured by an annular element, and since the tip is not sharp like the conventional waveguide configured by a linear element, the assembly of the antenna device is performed. In addition, the arrangement of the electrodes when mounting is easy, and the operation can be performed safely.
  • the operating frequency band can be widened by directing the opening surface of the loop of the annular element in the direction of arrival of radio waves.
  • the annular element is preferably arranged so that the opening surface of the loop substantially coincides with the surface orthogonal to the central axis of the antenna support rod via the support base.
  • the director may be composed of a plurality of pairs of annular element forces, which may be composed of a pair of annular elements, but each annular element may be supported by a single support base. Desirable
  • each annular element has a long length having linear portions parallel to each other as in the director of the third aspect.
  • the support base is cut off by these two pairs of annular elements, with a straight portion of each annular element extending outwardly from the antenna support rod and a plane passing through the central axis of the antenna support rod. It is preferable to arrange so that the linear portions of two annular elements arranged in the same space are substantially parallel.
  • the annular element constituting the waveguide may be any loop element made of a conductive material, and in particular, the waveguide of the fourth aspect.
  • the annular element has a substantially rectangular shape, radio wave arrival without increasing the short dimension of the loop
  • the area of the director with respect to the direction can be widened, and the use frequency band can be widened without increasing the size of the director (and thus the antenna device).
  • each annular element is integrally formed with the support base, a waveguide having a strong structure with excellent durability can be realized.
  • both ends of the conductive material formed in a loop shape are made conductive as in the case of the waveguide of the sixth aspect.
  • Each annular element may be formed by connecting through a fixing means having electrical connection, and a base portion including a connection portion connected by fixing means in the annular element may be integrally formed with the support base.
  • each annular element can be easily manufactured with materials and tools that are generally easily available, and the base of the annular element is formed as a single body on a support base. By doing so, it is possible to provide a waveguide having a strong structure with excellent durability.
  • the waveguide provided together with the radiator on the antenna support rod is composed of the directors of the first to sixth aspects.
  • An antenna device with a wide frequency band can be realized at low cost, and the antenna device can be miniaturized.
  • the end of the director is not sharp, it is possible to realize an antenna device that is easy to handle and assemble in assembly and safe, and in particular, the waveguide according to the fifth or sixth aspect is used. By doing so, the durability of the antenna device itself can be enhanced.
  • two radiators are arranged with a radiator disposed in parallel to each other with an interval between the antenna support rod and the antenna support rod. Constructed! These loop antennas are arranged so that their opening surfaces substantially coincide with a plane orthogonal to the central axis of the antenna support rod, and both ends of each loop antenna are connected to each other via phase adjusting means. /!
  • the area of the radiator with respect to the direction of arrival of the radio wave along the central axis of the antenna support rod is smaller than when the radiator is configured by a linear element.
  • the frequency band of radio waves that can be transmitted and received can be increased by increasing the frequency.
  • the radiator when the radiator is formed by a linear element, the operating frequency band is wide, and the antenna In the device, the amount of change in the reactance component is large within the frequency band, and the VSWR (voltage standing wave ratio) is worse near the minimum frequency and near the maximum frequency in the frequency band used than near the center frequency, and the gain decreases. To do.
  • the radiator is configured with two loop antennas and arranged as described above, the area of the radiator with respect to the direction of arrival of radio waves can be widened, so that excellent VSWR characteristics can be realized. In other words, it is possible to widen the frequency band of radio waves that can be transmitted and received by the antenna device.
  • the radiator since the two loop antennas constituting the radiator are arranged at the front and back of the antenna support rod with a gap therebetween, the radiator alone can maximize the directivity characteristics with respect to the arrival direction of the radio wave. It ’s a mosquito.
  • the antenna characteristics gain, V
  • the antenna device in the antenna device according to the ninth aspect, there is a reflector made of a plate material formed in a substantially rectangular shape on the side opposite to the waveguide with the radiator of the antenna support rod interposed therebetween. Is provided.
  • the antenna device of the ninth aspect it is possible to further improve the antenna characteristics, particularly the directivity characteristics of the antenna device.
  • the reflector is composed of a substantially rectangular plate material, the force S can be increased by increasing the area with respect to the direction of arrival of the radio wave and widening the usable frequency band of the reflector.
  • FIG. 1 is a perspective view illustrating a configuration of a radiator according to an embodiment.
  • FIG. 2] (a) to (e) represents an annular element constituting the director of the embodiment
  • FIGS. 2 (a) to (d) are explanatory diagrams showing the procedure for constructing the annular element
  • FIG. 2 (e) Fig. 2 is a cross-sectional view taken along line ⁇ - ⁇ shown in Fig. 2 (d).
  • FIG. 3 (a) to (d) The overall configuration of the waveguide of the embodiment is shown.
  • Fig. 3 (a) is a top view
  • Fig. 3 (c) is a rear view
  • Fig. 3 (d) is a right side view.
  • FIG. 4A and 4B show the configuration of the reflector of the embodiment, FIG. 4A is a perspective view, and FIG. 4B is an enlarged view of a main part showing the reflector mounting structure.
  • FIG. 5] (a) to (c) is a schematic configuration diagram showing the configuration of the antenna device of the embodiment, and FIG. FIG. 5 (b) is a side view and FIG. 5 (c) is a side view showing different embodiments of the antenna.
  • FIG. 6 (a), (b) represents the configuration of the antenna device of the embodiment
  • FIG. 6 (a) is a cross-sectional view taken along the line VIA VIA shown in FIG. 5 (a)
  • FIG. FIG. 6 is a cross-sectional view taken along line VIB-VIB shown in FIG.
  • FIG. 7] (a), (b) represents the configuration of the antenna device of the embodiment
  • FIG. 7 (a) is the VII shown in FIG. 5 (a).
  • FIG. 7 (b) is a cross-sectional view taken along the VIIB-VIIB line shown in Fig. 7 (a).
  • FIG. 8 is an explanatory view showing a modification of the director.
  • FIG. 1 is a schematic perspective view showing a configuration of a radiator used in the antenna device of the embodiment.
  • the radiator 10 includes a first loop antenna 11 and a second loop antenna. 12 and The first loop antenna 11 and the second loop antenna 12 are positioned so that the second loop antenna 12 is positioned in front of the direction of arrival of radio waves (in the direction indicated by arrow F in the figure) and the first loop antenna 11 is positioned behind the second loop antenna 12.
  • the loop antennas 12 are spaced apart from each other and arranged in parallel.
  • the first loop antenna 11 and the second loop antenna 12 are arranged so that the plane substantially perpendicular to the arrangement direction of the loop antennas 11 and 12 and the opening surface are aligned with each other.
  • the first loop antenna 11 is an upper radiating element l provided with connection points lla and 11a 'opposite to the base parts llg and llg which are the central parts extending in both sides in the horizontal direction. id, a lower radiating element l ie arranged substantially in parallel below the upper radiating element lid, and side radiating elements l lb and 11c that connect the outer radiating element 1 Id and the outer end of the lower radiating element l ie, Thus, it is formed in a rectangular shape.
  • the second loop antenna 12 also includes connection points 12a and 12 that face each other at the base portions 12g and 12g that are the central portions that are long on both sides in the horizontal direction.
  • the upper radiating element 12d, the lower radiating element 12e disposed substantially parallel to the lower side of the upper radiating element 12d, and the side radiating elements 12b and 12c connecting the outer ends of the upper radiating element 12d and the lower radiating element 12e. And formed into a rectangular shape.
  • connection points 11 &, 1 1a 'of the first loop antenna 11 1 1 and the connection points 12a, 12 of the second loop antenna 12 are connected to the connection points 11 &, 1 1a' of the second loop antenna 12, respectively. These are connected to each other via phase adjusting means 15 and 15 for phase adjustment.
  • the first loop antenna 11 and the second loop antenna 12 have a rectangular shape, but the shape of each of the loop antennas 11 and 12 is not particularly limited. Other shapes may be used as necessary.
  • the dimensions of the respective parts of the first loop antenna 11 and the second loop antenna 12 and the distance between the loop antennas 11 and 12 are set so as to obtain desired antenna characteristics.
  • the length W4 of the first loop antenna 11 is set to a length substantially equal to the wavelength ⁇ 1 corresponding to the minimum frequency in the used frequency band
  • the length of the second loop antenna 12 W5 is the wavelength ⁇ 2 corresponding to the center frequency in the operating frequency band.
  • the distance between the loop antennas 11 and 12 is set to be approximately one-tenth of the wavelength 2 corresponding to the center frequency in the used frequency band.
  • the antenna device power S using this radiator 10 is a UHF antenna that receives a UHF band television broadcast wave of 470 MHz to 770 MHz. Is formed such that the length between the side radiating elements 1113-1; ⁇ is 260111111, the length H4 of the side radiating elements l ib and 11c is 45.5 mm, and the second loop antenna 12 is The length between the side radiating elements 12b-12c is 225mm, the length of the side radiating elements 12b and 12c is H5 force 5.5mm, and the distance between these loop antennas 11, 12 Is set to 52mm.
  • the base parts llg, llg, 12g, and 12g of the first loop antenna 11 and the second loop antenna 12 constituting the radiator 10 and the phase adjusting means 15 and 15 are accommodated in the case 5. Yes.
  • the radiator 10 configured as described above includes a first loop antenna 11 and a second loop antenna.
  • the first loop antenna 11 and the second loop antenna 12 are, for example, a force S formed by bending a metal rod having a diameter of 3 mm to a predetermined length
  • the loop antennas 11 and 12 are Alternatively, a metal pipe may be formed, a conductive material may be formed by pressing, or a thin wire formed in a loop shape may be integrally formed with a resin. That is, the first norep antenna 11 and the second loop antenna 12 may be any conductive material formed in a loop shape so as to have a predetermined dimension.
  • phase adjusting means 15 strikes a predetermined length of a metal plate or the like which may be used by etching a metal conductor provided on the printed wiring board to a predetermined length. There is no particular limitation on the method of forming the material formed by punching.
  • FIGS. 2 (a) to 2 (e) show the annular element constituting the waveguide
  • FIGS. 2 (a) to 2 (d) show the procedure for constructing the annular element.
  • 3 (a) to 3 (d) are schematic configuration diagrams showing the overall structure of the waveguide. Is a top view, FIG. 3 (b) is a front view, FIG. 3 (c) is a rear view, and FIG. 3 (d) is a right side view.
  • the waveguide 3 of the present embodiment is formed in a substantially rectangular shape having a horizontal length Wa longer than a vertical height HI.
  • a pair of annular elements 30, 30 are provided in a substantially rectangular shape having a horizontal length Wa longer than a vertical height HI.
  • the longitudinal axis is aligned with the horizontal direction and arranged on the same plane with a predetermined spacing.
  • this director 3 is used with its opening surface directed in the direction of arrival of radio waves, and the antenna device of the present embodiment includes a plurality of the waveguides 3 in parallel with a predetermined interval. It is configured by arranging them individually.
  • the annular element 30 includes an upper waveguide element 30d that is long in the horizontal direction, and an upper waveguide element 3
  • the annular element 30 is formed by folding back a conductive material 39 as a waveguide element material using a mold or the like, and the central portion of the side waveguide element 30c is opened. Thus, it has a free-end configuration.
  • the tip portions 30h and 30i of the conductive material 39 are connected to each other via a tubular and conductive fixing means 35 having a through hole 35a to the extent that the tip portions 30h and 30i can be freely inserted. It is fixed.
  • the tips 30h and 30i are opened in the vertical direction as shown in the figure, As shown in the figure, the tips 30h and 30i are opened in the front-rear direction so that the tips 30h and 30i face each other! To be.
  • the other tip 30 i (the lower tip in the figure) is inserted from the lower side of the through hole 35 a of the fixing means 35.
  • the conductive material 39 has inertia, and if no force is applied to the upper waveguide element 30d (or the lower waveguide element 30e), the conductive material 39 returns to its original shape, so that one tip 30h is fixed. As shown in Fig. 2 (c), the fixing means is inserted by being inserted from above the through hole 35a. 35 is latched to the tip portions 30h and 30i of the conductive material 39.
  • the fixing means 35 When the fixing means 35 is thus hooked, the fixing means 35 is cured while maintaining the tips 30h and 30i in contact with each other or the shape of the conductive material 39 being a predetermined size. Caulking to reduce the diameter using tools and tools.
  • the conductive material 39 has the annular elements 30 in a state in which the folded back tip portions 30h and 30i are connected and fixed and electrically conductive. It is configured as
  • Fig. 2 (e) is a cross-sectional view taken along the line ⁇ - ⁇ shown in Fig. 2 (d).
  • the annular element 30 is formed by folding back a metal bar having a diameter of 3 mm that is generally easily available as the conductive material 39, and fixing the tip portions 30h, 30i to the fixing means 35. Therefore, it is manufactured by fixing with a commercially available jig or tool by crimping or the like. For this reason, even if a material that cannot be welded, such as a lightweight aluminum material, is used as the conductive material 39, the tips 30h and 30i can be mechanically firmly fixed and electrically connected. Power S can be. Therefore, according to this embodiment, if the production process of the annular element 30 can be simplified and the cost can be reduced, advantages such as a reduction in the weight of the antenna device can be achieved.
  • annular element 30 is formed by punching a plate material made of a conductive material into a required size with a required line width by pressing, a thin wire material is formed in a loop shape. Even if it is a method of integrally molding the material formed with resin, it may be determined in consideration of the cost of the member, the molding cost, the assembly cost, etc.
  • the force shown in the example in which the annular element 30 has a rectangular shape is not limited to this example, and the shape may be appropriately changed.
  • the diameter of the conductive material 39 is 3 mm, for example.
  • the waveguide 3 used in the antenna device of this embodiment is large and small, and assuming that the wavelength corresponding to the center frequency of the used frequency band is 2, / J, the ring of the third waveguide 3
  • the length of the element 30 is approximately 0 ⁇ 58 2 large!
  • the length of the annular element 30 Wa 2 (approximately 0.672, the distance between the pair of annular elements 30 and 30 constituting the director 3 Is set to approximately 0.1252.
  • the length Wal of the annular element 30 of the smaller waveguide 3 is 124 mm.
  • the length Wa2 of the annular element of the larger director 3 is set to 146 mm, and the distance between the pair of annular elements 30 and 30 constituting each director 3 is set to 60 mm.
  • the height HI of the annular element 30 of vessel 3 is set to 22mm! /
  • the overall length W of the waveguide 3 of the present embodiment is 314 mm, as shown in FIGS. 5 (a) to (c), where the length W1 of the smaller waveguide 3A is 314mm.
  • the length of the larger waveguide 3B becomes W2 force 3 ⁇ 458mm.
  • the longitudinal center axes of the pair of annular elements 30, 30 are on the same line, Force, the length of the entire waveguide 3 W
  • each annular element 30, 30 so that (in detail Wl, W2) is the above-mentioned predetermined length.
  • the support base 31 is formed by molding a synthetic resin material or the like with a mold or the like, and the base portions 30g of the annular elements 30, 30 are integrally formed with the support base 31, thereby supporting the support base 31. It is firmly fixed to the base 31.
  • an antenna support rod 2 (see FIGS. 5 (a) to 5 (c)) that integrally supports the radiator 10 and the waveguide 3 is passed through substantially the center position of the support base 31.
  • a through hole 34 is formed!
  • the entire circumference of the periphery of the through hole 34 or at least the upper part in the figure protrudes substantially parallel to the axial direction of the antenna support rod 2 from the support base 31, and the protruding portion
  • a projecting piece 32 having a through hole 33 formed in a direction perpendicular to the axis of the antenna support rod 2 is formed at the approximate center of the antenna support rod 2.
  • the director 3 according to the present embodiment is configured using the pair of annular elements 30, and therefore has an effective area with respect to the direction of arrival of radio waves compared to the case where the waveguide 3 is configured using linear elements. This makes it possible to widen the frequency band of the director 3 without increasing the shape of the director 3 (specifically, the length W).
  • the annular element 30 has a shape in which both ends of the linear element are folded and the ends thereof are joined to each other, so that the annular element 30 is replaced with a linear element instead of the annular element 30.
  • the length Wa can be shortened.
  • the length Wa of 146 mm used in the present embodiment is replaced with a linear element, the length needs to be 160 mm.
  • the waveguide 3 By configuring the waveguide 3 with the pair of annular elements 30, the length W of the entire waveguide 3 can be shortened and the waveguide 3 can be reduced in size.
  • the end portion of the waveguide 3 is closed by the annular element 30 and is not pointed as in the prior art, so that it is possible to realize a waveguide that is easy and safe to handle in assembly and installation. . Furthermore, since the waveguide 3 is formed by integrally molding the annular element 30 on the support base 31, a waveguide having a strong structure with excellent durability can be realized.
  • FIG. 4 (a) and 4 (b) show the configuration of the reflector 20 of the present embodiment
  • FIG. 4 (a) is a perspective view showing the overall configuration of the reflector 20
  • FIG. 4 (b) FIG. 3 is an enlarged view of a main part showing a structure for attaching the reflector 20 to the antenna support rod 2.
  • the reflector 20 of the present embodiment is manufactured by punching and forming an aluminum plate whose surface is anodized into a rectangular shape. As shown in FIG. If the weight is reduced, a long hole designed to reduce the wind receiving area is formed. In addition, an attachment angle 50 for fixing the reflector 20 to the antenna support rod 2 is provided at the approximate center of the plate surface of the reflector 20.
  • the mounting angle 50 is disposed so as to protrude to the front side of the reflector 20, and a contact portion 52 that can contact the outer peripheral surface of the antenna support rod 2 and a rear side of the contact portion 52.
  • the mounting portion 57 is provided so as to be substantially orthogonal to the projecting direction of the contact portion 52 and is attached to the plate surface of the reflector 20.
  • the mounting angle 50 is firmly fixed to the reflector 20 by fixing the mounting portion 57 to the plate surface of the reflector 20 using screws 60 and nuts 61.
  • the contact portion 52 of the mounting angle 50 has a curved portion 51 corresponding to the outer peripheral surface of the antenna support rod 2 at least in a half of the circumferential direction of the antenna support rod 2 or in a narrower range. Is formed.
  • the mounting angle 50 supports the curved portion 51 as an antenna.
  • Through holes 55 and 28 formed in the contact portion 52 and the antenna support rod 2 with screws 53 as fastening means abutting against the peripheral surface of the antenna support rod 2 from above the rod 2 (FIG. 7 (a) , (b)), and tighten the nut 54 to one end of the screw 53 by tightening the nut 54 and tightening it to the antenna support rod 2.
  • the thickness of the aluminum material constituting the reflector 20 is 1.5 mm, and the size is such that the horizontal length W6 is 295 mm and the vertical height H6. Is set to 100 mm.
  • the antenna device (UHF antenna) of this embodiment configured using the above-described radiator 10, the plurality of waveguides 3, and the reflector 30 will be described.
  • FIG. 5 (a) to 5 (c) are schematic configuration diagrams showing the configuration of the antenna device of the present embodiment.
  • FIG. 5 (a) is a top view
  • FIG. 5 (b) is a side view
  • FIG. c) is a side view showing a modification of the antenna device.
  • the antenna device 1 of the present embodiment has the radiator 10, the plurality of waveguides 3, and the reflector 20 fixed to the antenna support rod 2. It is comprised by.
  • the waveguide 3 used in the antenna device 1 of the present embodiment is composed of two types of waveguides 3A and 3B having different lengths W.
  • three waveguides 3 made up of smaller waveguides 3A are arranged with a predetermined interval L1 behind them, with a predetermined interval L2 (L2>)
  • L1 a predetermined interval behind them
  • L2 a predetermined interval behind them
  • L3 a predetermined distance
  • the distance between the center point before and after the second loop antenna 12 and the first loop antenna 11 and the director 3B is L4 (L4 to L1).
  • the radiator 10 is arranged as described above, and the reflector 20 is arranged behind the radiator 10 by a predetermined distance L5 (L5> L3).
  • the antenna device 1 of the present embodiment is configured as a UHF antenna having a total of 7 elements.
  • Fig. 6 (a) is a cross-sectional view taken along the line VIA-VIA in Fig. 5 (a)
  • Fig. 6 (b) is a cross-sectional view taken along the line VIB-VIB in Fig. 5 (a).
  • Fig. 7 (a) is a cross-sectional view taken along line VIIA-VIIA in Fig. 5 (a)
  • Fig. 7 (b) is a cross-sectional view taken along line VIIB-VIIB in Fig. 7 (a).
  • the antenna support rod 2 is passed through the through hole 34 formed in the support base 31 of the waveguide 3.
  • the antenna support rod 2 is provided with through-holes 23 for attaching the directors in the vertical direction at positions where the above-described distances L1 to L3 are provided and the respective waveguides 3 are to be fixed. Therefore, the predetermined waveguide is arranged so that the axis of the corresponding through hole 23 and the axis of the through hole 33 formed in the protruding piece 32 of the support base 31 substantially coincide with each other.
  • a screw 21 is attached so as to pass through the through hole 33 and the through hole 23 for attaching the director from above the protruding piece 32.
  • the waveguide 3 and the antenna support rod 2 are clamped by screwing into a nut 22 provided on the lower side of 2.
  • the plurality of waveguides 3 are firmly attached to the antenna support rod 2 at a predetermined interval.
  • the antenna support rod 2 is an example in which the waveguide 3 is supported so as to pass through the center point of the waveguide (that is, the through hole formed in the support base 31). As shown in the force S shown in FIG. 5 (c), each element may be arranged on the upper side (or lower side) of the antenna support rod 2.
  • the antenna support rod 2 has a through-hole 23 for attaching the director 3 to which the director 3 is attached, and the rearmost waveguide 3 ( Specifically, a through hole 24 for mounting the radiator 10 is drilled at a rear position separated by a predetermined distance L 4 from the director 3B) so as to be parallel to the through hole 23 for mounting the director. .
  • radiator 10 when radiator 10 is attached to antenna support rod 2, first, radiator 10 is provided.
  • the antenna support rod 2 is passed through the obtained first and second loop antennas 11 and 12, and the radiator mounting portion 8 formed at the bottom of the case body 7 which is the base of the case 5 is penetrated.
  • the radiator 10 is moved to a position facing the through hole 24.
  • reference numeral 6 shown in FIG. 6 represents a lid that closes the opening of the case body 7, and the case 5 includes the lid 6 and the case body 7.
  • the bottom of the case body 7 on which the radiator attachment portion 8 is formed comes into contact with the upper outer periphery of the antenna support rod 2.
  • the receiving piece 17 having the formed curved portion 17a is formed on the front and back of the case body 7 so as to be arranged in the axial direction of the antenna support rod 2 with the radiator mounting portion 8 interposed therebetween. It is configured to be stably attached to the tener support rod 2.
  • Figure 6 (b) shows this mounting state.
  • the boss 14 is for attaching a printed wiring board 43 on which a transmission line as the phase adjusting means 15 is formed and fixing the first loop antenna 11 and the second loop antenna 12 to the case body 7. is there.
  • a through hole (not shown) for fixing is formed in the printed wiring board 43 at a position facing the boss 14, first, the through hole for fixing is used as a screw mounting hole for the boss. Place printed wiring board 43 on the boss so as to face 14a.
  • the first loop antenna 11 and the second loop antenna 12 are attached to the case body 7.
  • the front end portions of the base portions 1 lg and 12g including the connection points l la, 11a ′ and 12a, 12a ′ accommodated in the case body 7 of the first loop antenna 11 and the second loop antenna 12 are pressed.
  • Recesses (or mounting holes) 41, 4 ⁇ and 42, 42 '(only 41 and 42 are shown in the figure) ) Is formed, and is fixed by threading the screw 44 from above the recess and screwing it into the screw mounting hole 14a.
  • the balanced / unbalanced conversion section 4 5 is provided between the predetermined position of the printed wiring board 43 and the antenna output terminal 40. Connect through the etc.
  • the accommodating portion 18 is a space for accommodating the balance-unbalance converting portion 45 and the like and for mounting the antenna output terminal 40.
  • the accommodating portion 18 protrudes downward from a part of the bottom portion of the case body 7 and is internally provided.
  • the second storage space 18a has an F-type coaxial connector seat as an antenna output terminal 40 for connecting the antenna and the outside to the bottom surface of the second storage space 18a.
  • Reference numeral 19 shown in the figure denotes a draining skirt portion, and a cylindrical draining device whose axial center coincides with the antenna output terminal 40 is provided on the lower surface of the housing portion 18 so as to protrude downward. ing.
  • the accommodating portion 18 has an imaginary plane (H-- in Fig. 6 (b)) in which the tip end portion of the antenna output terminal 40 passes over the central axis of the antenna support rod and is substantially parallel to the central axis. (H line), the antenna support rod 2 and the loop antennas 11 and 12 are obstructive when connecting the lead-in wire to the antenna output terminal 40. Do not impair the ease of connection!
  • the tip of the antenna output terminal 40 is substantially on a virtual plane formed by the lower radiating elements lle and 12e of the loop antennas 11 and 12 in the arrangement direction. So that height is formed! /!
  • the accommodating portion 18 such as the balance / unbalance conversion portion 45 is provided on the side where the antenna support rod 2 is disposed (that is, below) at a position that does not interfere with the mounting of the antenna support rod 2. Therefore, the portion of the radiator 10 where the case 5 protrudes above the antenna support rod 2 can be reduced.
  • the output signal of this UHF antenna is not limited to the balance / unbalance conversion unit 45 or the like.
  • the signal from an external antenna such as a satellite antenna not shown in the figure
  • a mixing circuit that mixes signals and outputs the signals from one antenna output terminal 40 may be accommodated.
  • an external antenna input terminal for an external antenna that connects a lead-in wire from the external antenna may be provided on the lower surface of the housing portion 18.
  • a reflector is mounted so as to be substantially parallel to these through holes.
  • a through hole 28 is formed.
  • a through hole 55 is formed in the contact portion 52 of the mounting angle 50 of the reflector 20.
  • the abutting portion 5 2 of the mounting angle 50 from the radial direction of the antenna support rod 2 (above the antenna support rod 2 in this embodiment).
  • the reflector 20 is mounted on the antenna support rod 2 so that is in contact with the rear end of the antenna support rod 2.
  • the position of the through hole 55 formed in the contact portion 52 and the position of the reflector mounting through hole 28 formed in the antenna support rod 2 are adjusted so that they face each other.
  • a nut 54 is screwed onto the screw 53 and tightened.
  • the reflector 20 is securely fixed to the antenna support rod 2.
  • Reference numeral 56 shown in FIGS. 7A and 7B is a fastening piece, which is a deformation preventing metal fitting for preventing the antenna support rod 2 from being crushed by fastening of the screw 53 and the nut 54.
  • the antenna device 1 of the present embodiment is arranged such that the five waveguides 3, the radiator 10, and the reflector 20 are sequentially spaced from the one end side of the rod-shaped antenna support rod 2. It is composed by placing a space!
  • Each director 3 is composed of a pair of annular elements 30, 30 formed in a rectangular loop shape, and each annular element 30, 30 is connected to an antenna via a support base 31.
  • the plane is symmetrical with respect to a plane passing through the central axis of the support rod 2, and the opening surface thereof is arranged to coincide with a plane orthogonal to the central axis of the antenna support rod 2.
  • each waveguide 3 is formed by a linear element. Compared to the configuration, the area of the element with respect to the direction of arrival of radio waves can be increased, the frequency band used can be widened, and the length W of the director 3 can be shortened to reduce the size of the antenna device 1. Can be achieved.
  • both ends of the director 3 are not pointed like a conventional waveguide configured by using linear elements, so that it is easy to handle and assemble the antenna device. Can be done safely.
  • radiator 10 is configured by two loop antennas 11 and 12, and each of loop antennas 11 and 12 coincides with a plane whose opening surface is orthogonal to the central axis of antenna support rod 2.
  • both ends of each of the loop antennas 11 and 12 are connected to each other via the phase adjusting means 15.
  • the radiator with respect to the arrival direction of the radio wave along the central axis of the antenna support rod 2 as compared with the case where the radiator 10 is configured by a linear element.
  • the area of 10 can be increased to expand the frequency band of radio waves that can be transmitted and received.
  • the radiator 10 since the two loop antennas 11 and 12 constituting the radiator 10 are arranged at the front and back of the antenna support rod 2 with a space therebetween, the radiator 10 alone is used with respect to the arrival direction of the radio wave. The directivity can be maximized.
  • the force described as the height of the annular element 30 constituting the director 3 being HI.
  • the height force of the element 30 may be configured to be slightly smaller than the height of the annular element 30 of the waveguide 3 located at the rear side.
  • the director 3 is described as being configured using a pair of annular elements 30, but the director 3 may be configured using a plurality of pairs of annular elements 30. Good
  • the director 3 is configured by two pairs of annular elements 30 As shown in FIG. 8, a pair of annular elements 30 are arranged on the same axis with a support base 31 interposed therebetween, and are blocked by a plane passing through the center axis of the antenna support cage 2 via the support base 31.
  • the two annular elements 30 respectively arranged in the left and right spaces to be cut may be made parallel to each other.

Landscapes

  • Aerials With Secondary Devices (AREA)

Abstract

L'invention concerne un guide d'ondes disposé sur une tige de support d'antenne conjointement avec un élément rayonnant. Le guide d'ondes comporte une ou plusieurs paires d'éléments annulaires obtenus par la formation d'un matériau conducteur dans une boucle et comporte également une base pour supporter les éléments annulaires, de telle sorte que chaque paire d'éléments annulaires est disposée de façon symétrique sur un plan passant par l'axe central de la tige de support d'antenne.
PCT/JP2007/070940 2006-10-26 2007-10-26 Guide d'ondes et dispositif d'antenne WO2008050869A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2006-291231 2006-10-26
JP2006291231 2006-10-26

Publications (1)

Publication Number Publication Date
WO2008050869A1 true WO2008050869A1 (fr) 2008-05-02

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PCT/JP2007/070940 WO2008050869A1 (fr) 2006-10-26 2007-10-26 Guide d'ondes et dispositif d'antenne

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201800005684A1 (it) * 2018-05-24 2019-11-24 Componente di antenna

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4847242U (fr) * 1971-10-04 1973-06-21
JPS62149202A (ja) * 1985-12-24 1987-07-03 Yagi Antenna Co Ltd 高前後比形八木アンテナ
JP2003046330A (ja) * 2001-07-31 2003-02-14 Icom Inc 多素子ループアンテナ
JP2004336134A (ja) * 2003-04-30 2004-11-25 Sumitomo Electric Ind Ltd ３ｌループアンテナ及びそれを用いたループアンテナ
JP2006174362A (ja) * 2004-12-20 2006-06-29 Akira Saito アンテナ支持具

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4847242U (fr) * 1971-10-04 1973-06-21
JPS62149202A (ja) * 1985-12-24 1987-07-03 Yagi Antenna Co Ltd 高前後比形八木アンテナ
JP2003046330A (ja) * 2001-07-31 2003-02-14 Icom Inc 多素子ループアンテナ
JP2004336134A (ja) * 2003-04-30 2004-11-25 Sumitomo Electric Ind Ltd ３ｌループアンテナ及びそれを用いたループアンテナ
JP2006174362A (ja) * 2004-12-20 2006-06-29 Akira Saito アンテナ支持具

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
APPEL-HANSEN J.: "The loop antenna with director arrays of loops and rods", ANTENNAS AND PROPAGATION, IEEE TRANSACTIONS, vol. 20, no. 4, July 1972 (1972-07-01), pages 516 - 517, XP003021897 *
KOREKADO T. ET AL.: "Design method of Yagi-Uda two-stacked circular loop array antennas", ANTENNAS AND PROPAGATION, IEEE TRANSACTIONS, vol. 39, no. 8, August 1991 (1991-08-01), pages 1112 - 1118, XP000230607 *
OJIRO Y. ET AL.: "One-point-fed circularly polarized Yagi-Uda loop array", ANTENNAS AND PROPAGATION SOCIETY INTERNATIONAL SYMPOSIUM, vol. 4, 18 June 1995 (1995-06-18) - 23 June 1995 (1995-06-23), pages 1875 - 1878, XP000588880 *
SHEN L.C. ET AL.: "Optimum design of Yagi array of loops", IEEE TRANSACTIONS, vol. 22, no. 6, November 1974 (1974-11-01), pages 829 - 830, XP003021896 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201800005684A1 (it) * 2018-05-24 2019-11-24 Componente di antenna

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