WO2011125857A1 - Antenna and sensor - Google Patents

Antenna and sensor Download PDF

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Publication number
WO2011125857A1
WO2011125857A1 PCT/JP2011/058258 JP2011058258W WO2011125857A1 WO 2011125857 A1 WO2011125857 A1 WO 2011125857A1 JP 2011058258 W JP2011058258 W JP 2011058258W WO 2011125857 A1 WO2011125857 A1 WO 2011125857A1
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Prior art keywords
substrate
antenna
length direction
region
line
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PCT/JP2011/058258
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French (fr)
Japanese (ja)
Inventor
康太 山田
大輔 遠松
順 植村
正裕 大津
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マスプロ電工株式会社
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Publication of WO2011125857A1 publication Critical patent/WO2011125857A1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
    • H01Q13/08—Radiating ends of two-conductor microwave transmission lines, e.g. of coaxial lines, of microstrip lines

Definitions

  • the present invention relates to an antenna formed by forming an antenna pattern on a substrate.
  • Patent Document a slot-like antenna pattern having an opening facing a side for transmitting or receiving a radio wave is formed on a substrate.
  • the electric field distribution when transmitting or receiving radio waves, the electric field distribution easily spreads in the direction other than the transmission direction or the reception direction, and thus the directivity as the antenna cannot be sufficiently improved.
  • An object of the present invention is to provide a technique for improving the directivity as an antenna as compared with the prior art.
  • the first aspect of the present invention is an antenna formed by forming a conductive antenna pattern on a dielectric plate-like substrate.
  • the antenna pattern includes a tapered portion having first and second tapered regions that are narrowed toward one end side in the length direction of the substrate, and a first and second tapered region of the tapered portion that are spaced apart in the width direction.
  • a pair of extending portions extending from one part to one end in the length direction of the substrate, and a plurality of protrusions extending from each of the extending portions toward a region sandwiched between the pair of extending portions.
  • a corrugated protrusion disposed along the vertical direction.
  • the extending portion in this configuration acts so that the directivity as the antenna increases as the length increases, and therefore, the extending portion may be extended by a length that can sufficiently enhance the directivity.
  • it is desirable for improving the directivity that each protrusion in the protrusion protrudes by a length ( ⁇ / 4) corresponding to the wavelength of a radio wave to be transmitted or received.
  • the taper portion in the antenna pattern is not particularly limited as to a specific shape, but it is conceivable that the above configuration is made as in the second aspect of the present invention.
  • the first taper region of the taper portion in the antenna pattern, extends at least from one end side in the length direction toward the other end side in the width direction on the substrate. And a second line extending from one end in the length direction of the first line to the other end side in the length direction and the second line extending away from the first line.
  • the taper region includes a third line extending from the other end side in the length direction toward the one end side on the other end side in the width direction of the substrate, the other end side in the length direction from one end in the length direction of the third line, and It has the area
  • the extending portion extends from one end of each of the first line and the third line in the tapered portion toward one end in the length direction of the substrate.
  • the extension part becomes a shape extended from each one end of a 1st line and a 3rd line
  • the shape from a taper part to an extension part can be made integral.
  • the other end of the second line and the other end of the fourth line may be directly connected to each other, or may be indirectly connected via another line. .
  • the interval between the extended portions in the antenna pattern may be an optimum interval according to the use environment such as the frequency of the radio wave to be transmitted or received, and the specific interval is not particularly limited.
  • the distance between each of the pair of extending portions may be set within a predetermined distance range.
  • the first taper region of the taper portion is one end in the width direction on the substrate from the other end side in the length direction in the first taper region and one end side in the width direction.
  • the second taper region of the taper portion extends from the other end side in the length direction and the other end side in the width direction of the second taper region to the other end in the width direction of the substrate.
  • a second stub projecting toward the.
  • each protrusion of the protrusion may be arranged only in a partial region in the extension part, and as in the fifth aspect of the present invention, in the antenna pattern, the protrusion is Of the extending portion, the protrusion may be arranged over at least a region reaching one end in the length direction of the substrate.
  • tapered portion in each of the above-described configurations may be formed only on the front surface or the back surface of the substrate, but each tapered region may be formed on each of the front and back surfaces.
  • the sixth aspect of the present invention can be considered.
  • the first tapered region of the tapered portion and the extending portion extending from the first tapered region are formed on the surface of the substrate, and the second tapered region of the tapered portion and The extending portion extending from the second tapered region is formed on the back surface of the substrate.
  • the tapered portion has a shape having an opening directed to one end side in the length direction of the substrate when the second tapered region is projected onto the front surface of the substrate or when the first tapered region is projected onto the back surface of the substrate.
  • the taper portion is not particularly limited with respect to its specific ratio and shape.
  • the region surrounded by the first line to the fourth line is a tapered portion, the region surrounded by the first line and the second line, It is conceivable to divide the area into two areas surrounded by the third line and the fourth line.
  • the seventh aspect of the present invention is a sensor characterized in that the antenna according to any one of the first to sixth aspects is arranged in m ⁇ n (2 ⁇ m, 1 ⁇ n).
  • the pair of extending portions extends from one part of the pair of tapered portions toward one end in the length direction of the substrate, and the protruding portion of the corrugated structure is further formed on the extending portion. Is provided. These extending portions and projecting portions suppress the spread of the electric field distribution outside the transmission or reception direction during transmission or reception of radio waves, so that the directivity as an antenna can be improved.
  • the antenna described above is used as a sensor by arranging the antennas in one or a plurality of rows and receiving radio waves radiated from the objects, and in this case, the detection range of each antenna is It is necessary to arrange them at intervals so as not to overlap.
  • the detection range can be narrowed by each antenna, so that the distance between the antennas can be narrowed, resulting in the entire sensor as a result. Can be reduced in size.
  • the protrusion provided on the extension part projects the protrusion toward the area sandwiched between the pair of extension parts, the protrusion is separated from the area sandwiched between the pair of extension parts. Compared with the case where the protrusion protrudes in the direction, there is no protrusion to the outside, which contributes not only to the miniaturization of the antenna element but also to the miniaturization of the entire sensor when used as a sensor. Yes.
  • the tapered portion can be formed by the region surrounded by the first line to the fourth line.
  • the tapered portion can be formed by the region surrounded by the first line to the fourth line.
  • the electric field distribution is not in the transmission or reception direction when the radio wave is transmitted or received by the first and second stubs projecting in the width direction from the other end in the length direction in the pair of tapered regions. Therefore, the directivity as an antenna can be further increased.
  • the electric field distribution is transmitted at the time of transmission or reception of the radio wave by the protrusion disposed over the region of the extending portion extending to one end side in the length direction of the substrate. Or it can suppress expanding to other than a receiving direction.
  • the freedom degree of pattern formation can be raised by forming an antenna pattern in the front and back both surfaces of a board
  • FIG. 1A is a figure which shows the whole antenna
  • FIG. 1B is a figure which shows a sensor.
  • the antenna 1 is formed by forming a conductive antenna pattern 20 on a dielectric plate-like substrate 10, and these antennas 1 are m ⁇ n (2 ⁇ m, 1 ⁇ n), the sensor 2 can be configured.
  • the substrate 10 is a plate-like member having a surface that extends in one of the two directions intersecting each other in the length direction (left-right direction in FIG. 1) and the other in the width direction (up-down direction in FIG. 1). In the embodiment, it is a rectangle extending in the length direction.
  • the substrate 10 is preferably made of a material having a high dielectric constant from the viewpoint of downsizing the entire antenna 1.
  • the antenna pattern 20 includes a tapered portion 23 having an opening 21 facing the one end 11 side in the length direction of the substrate 10, and two locations sandwiching the opening 21 in the width direction of the tapered portion 23 in the length direction of the substrate 10.
  • a corrugated structure in which a pair of extending portions 25 extending toward one end 11 and a plurality of protrusions extending from each of the extending portions 25 toward a region sandwiched between the pair of extending portions 25 are arranged along the length direction. And a protrusion 27.
  • the tapered portion 23 includes at least a first line 31 extending from the other end 15 side in the length direction toward the one end 11 side on the one end 13 side in the width direction of the substrate 10; A region surrounded by one end of the first line 31 in the length direction from the other end side in the length direction and the second line 33 extending in a direction away from the first line 31, and the other end in the width direction of the substrate 10
  • the third line 35 extending from the other end 15 side in the length direction toward the one end 11 side, and the other end side in the length direction and the third line 35 are separated from one end in the length direction of the third line 35.
  • a region surrounded by a fourth line 37 extending in the direction is formed.
  • the first line 31 to the fourth line 37 are all straight lines, but these may be lines other than the straight lines.
  • the extending portion 25 extends from one end of each of the first line 31 and the third line 35 in the slit portion 23 toward one end 11 in the length direction of the substrate 10.
  • these extending portions 25 act so that the directivity as an antenna increases as the length increases, and thus the extended portions 25 extend by a length that can sufficiently increase the directivity.
  • the distance between the extension portions 25 is a case where importance is placed on matching with the spatial impedance, it is arranged so that one end side is wider than the other end side, and if importance is placed on narrowing the directivity, They are arranged in a positional relationship such that one end to the other end extends in parallel.
  • the extending portion 25 is disposed at a position shifted from the respective end portions 13 and 17 in the width direction of the substrate 10 to the center side in the width direction by a predetermined distance. Further, the interval between the pair of extending portions 25 is set within a predetermined distance range. This predetermined range is determined in advance as an optimum interval according to the use environment such as the frequency of radio waves to be transmitted or received.
  • the protrusion 27 has a configuration in which the protrusion is arranged over the extended portion 25 up to a region reaching the one end 11 in the length direction of the substrate 10.
  • the tapered portion 23 includes a first stub 41 that protrudes from the other end side in the length direction and one end side in the width direction of the taper portion 23 toward the one end 13 in the width direction of the substrate 10, and in the taper portion 23. And a second stub 43 that protrudes from the other end in the length direction and the other end in the width direction toward the other end 15 in the width direction of the substrate 10.
  • the antenna pattern 20 in this embodiment includes one tapered region 23a obtained by dividing the width direction of the tapered portion 23 into two at a predetermined ratio, and an extending portion 25a extending from the tapered region 23a.
  • the other tapered region 23b divided in two and the extending portion 25b extending from the tapered region 23b are formed on the back surface of the substrate 10.
  • the tapered portion 23 is divided into a region surrounded by the first line 31 and the second line 33 and a region surrounded by the third line 35 and the fourth line 37.
  • the tapered portion 23 is directed toward the one end 11 side in the length direction of the substrate 10 when the other tapered region 23b is projected on the front surface of the substrate 10 or when one tapered region 23a is projected on the rear surface of the substrate 10.
  • a shape having the opening 21 is formed.
  • a transparent material is used for the substrate 10
  • a shape having an opening 21 facing the one end 11 side in the length direction of the substrate 10 is formed.
  • the taper region 23a is connected to a power supply line 52 extending linearly from the other end of the taper region 23a to the other end of the substrate 10.
  • the taper region 23b is connected to the taper region 23b from the other end of the taper region 23b.
  • a grounding portion 54 extending in a planar shape to the other end is connected.
  • the antenna 1 is used in a state where the grounding portion 54 is connected to the ground surface on the receiver side or the transmitter side, and the feeder line 52 is connected to the amplifier on the receiver side or the transmitter side.
  • the grounding unit 54 and the power supply line 52 are connected to a circulator or a switching circuit.
  • the frequency of the radio wave transmitted or received by the antenna 1 is 75 GHz, and the distance from the tip of the antenna 1 (one end 11 in the length direction of the substrate 10) to the object is 2 ⁇ .
  • the following values are selected as the dimensions of each component.
  • the dimension of each of the following constituent elements can change an optimum value depending on the use environment, and does not mean that the dimensions of the constituent elements of the present invention are limited to the following values.
  • the substrate 10 may be 38 mm in length, 4 mm in width, and 0.05 mm in plate thickness.
  • the slit portion 23 has a length of 8.5 mm.
  • the extending portion 25 is selected to have a length of 16.5 mm, and the distance between the extending portions 25 is selected to be 2.85 mm or 2.65 mm, and the distance from the end portions 13 and 17 of the substrate 10. It can be considered that 0.6 mm is selected.
  • the conventional antenna (b) 2.85 mm is selected as the interval between the extending portions 25 in the antenna 1 of the above embodiment, and the first and second stubs 41, 43 is not provided, (c) when 2.85 mm is selected as the interval between the extending portions 25 in the antenna 1, (d) 2.65 mm is set as the interval between the extending portions 25 in the antenna 1.
  • the VSWR is (a) 3.34, (b) 2.79, (c) 2.61, and (d) 1.36, and the configurations of the above embodiments are all conventional antennas. It shows an improvement trend compared to.
  • the extending portion 25 extends from the two portions of the tapered portion 23 that sandwich the opening 21 in the width direction toward the one end 11 in the length direction of the substrate 10. Furthermore, a corrugated protrusion 27 is provided on the extension 25.
  • the extension portion 25 and the projection portion 27 suppress the spread of the electric field distribution outside the transmission or reception direction when transmitting or receiving radio waves, the directivity as the antenna 1 can be enhanced.
  • this type of antenna is also assumed to be used as the sensor 2 by arranging the antennas in one or a plurality of rows and receiving radio waves radiated from the objects, and in this case, detection by each antenna is assumed. It is necessary to arrange them so that the ranges do not overlap.
  • the detection range can be narrowed by each antenna 1, so that the antennas 1 can be arranged with the interval between them narrowed. Miniaturization of the sensor 2 as a whole can be realized.
  • the protrusions 27 provided on the extension portions 25 project the protrusions toward the region sandwiched between the pair of extension portions 25, the protrusions 27 are sandwiched between the pair of extension portions 25.
  • the protrusion is protruded in the direction away from the region, so that not only the antenna element can be miniaturized, but also the sensor 2 as a whole can be miniaturized. Has also contributed.
  • the tapered portion 23 can be formed by a region surrounded by the first line 31 to the fourth line 37. Moreover, since the extension part 25 becomes a shape extended from each one end of the 1st line 31 and the 3rd line 35, the shape from the taper part 23 to the extension part 25 can be made integral.
  • interval of each extension part 25 as an optimal space
  • the first and second stubs 41 and 43 projecting in the width direction from the other end in the length direction of the tapered portion 23 cause the electric field distribution to be transmitted or received in the transmission or reception direction. Since it is suppressed that it spreads to other than, the directivity as the antenna 1 can be improved more.
  • the projection 27 disposed over the region of the extending portion 25 reaching the one end 11 side in the length direction of the substrate 10 causes an electric field to be transmitted or received when transmitting or receiving radio waves. It is possible to suppress the distribution from spreading outside the transmission or reception direction.
  • the freedom degree of pattern formation can be raised by forming the antenna pattern 20 in the front and back both surfaces of the board
  • FIG. (3) Modifications Embodiments of the present invention have been described above, but the present invention is not limited to the above-described embodiments, and can take various forms as long as they belong to the technical scope of the present invention. Needless to say.
  • substrate 10 illustrated the structure which becomes the rectangle extended in a length direction, about the board
  • the shape may be other than a rectangle.
  • the taper part 23 is suitable for the one end 11 side of the length direction in the board
  • a structure formed only on the surface of the substrate 10 may be used, or a structure divided into three or more parts may be formed on the front and back surfaces.
  • the protrusion part 27 should just be arrange
  • the projection may be arranged from the contact with the projection, or the projection may be arranged from a location away from the contact by a predetermined distance toward the one end 11 of the substrate.
  • the 1st, 2nd stub 41,43 provided in the taper part 23 is what is comprised so that it may protrude toward the one end 13 or the other end 17 of the width direction in the board
  • stubs 45a and 45b having a configuration protruding in the length direction from the other ends of the tapered regions 23a and 23b, and the other end side of the tapered portion 23 as shown in FIG. 5B.
  • the slits 49a and 49b formed in an oblique direction can be considered.
  • the taper part 23 opened to substantially V shape and illustrated the structure which the other end side is slanting with respect to the width direction of the board
  • opening of this taper part 23 is as follows.
  • the other end side may be a planar end wall 23 c extending in the width direction of the substrate 10.
  • the tapered portion 23 only on the front surface of the substrate 10 and to form the probe 62 not electrically connected to the tapered portion 23 on the back surface. This is preferable in terms of improving the properties.
  • the substrate 10 is a multilayer substrate, the surface on which the probe 62 is formed may be provided as the surface of the layer on which the tapered portion 23 is not formed.
  • the configuration in which all the protrusions 27 have a length corresponding to the wavelength in one type of radio wave to be transmitted or received is illustrated, but the protrusions 27 are illustrated in FIGS. 8A to 8C. As shown, it may be composed of a plurality of regions each having a length corresponding to each of a plurality of types of radio waves. However, when the protrusion 27 is configured by a plurality of regions, the region located at one end of the extension 25 is set to a length corresponding to the lowest frequency radio wave (specifically, the longest). It is desirable. In FIG.
  • 27 a1 and 27 b1 represent high-frequency protrusions
  • 27 a2 and 27 b2 represent low-frequency protrusions
  • FIG. 8B, in FIG. 8C 27 ai and 27 bi represent the high frequency protrusion
  • 27 aii and 27 bii represent mid-frequency protrusion
  • 27 aiii and 27 biii is low frequency protrusion Represents.

Abstract

The disclosed antenna comprises a flat dielectric substrate and a conductive antenna pattern provided on said substrate. The antenna pattern comprises: a tapered section that has first and second tapered regions that decrease in width towards one lengthwise end of the substrate; a pair of extension sections that extend towards one lengthwise end of the substrate from parts of the first and second tapered regions in the tapered section, respectively; and corrugated protrusion sections in which a plurality of protrusions, arranged along the aforementioned long direction, extend from the extension sections towards a region sandwiched by the pair of extension sections.

Description

アンテナおよびセンサAntenna and sensor 関連出願の相互参照Cross-reference of related applications
　本国際出願は、２０１０年３月３１日に日本国特許庁に出願された日本国特許出願第２０１０‐８３２４３号に基づく優先権を主張するものであり、日本国特許出願第２０１０‐８３２４３号の全内容を本国際出願に援用する。 This international application claims priority based on Japanese Patent Application No. 2010-83243 filed with the Japan Patent Office on March 31, 2010, and is based on Japanese Patent Application No. 2010-83243. The entire contents are incorporated into this international application.
　本発明は、基板にアンテナパターンを形成してなるアンテナに関する。 The present invention relates to an antenna formed by forming an antenna pattern on a substrate.
　近年、ミリ波などの電波を送信または受信するためのアンテナとして、電波を送信または受信する側に向いた開口を有するスロット状のアンテナパターンを基板上に形成するアンテナが提案されている（特許文献１参照）。 In recent years, as an antenna for transmitting or receiving a radio wave such as a millimeter wave, an antenna has been proposed in which a slot-like antenna pattern having an opening facing a side for transmitting or receiving a radio wave is formed on a substrate (Patent Document). 1).
特許第３４６２９５９号公報Japanese Patent No. 3462959
　しかし、上述したアンテナにおいては、電波の送信または受信に際し、送信方向または受信方向以外へも電界分布が拡がりやすいため、アンテナとしての指向性を充分に高めることができているとはいえない。 However, in the antenna described above, when transmitting or receiving radio waves, the electric field distribution easily spreads in the direction other than the transmission direction or the reception direction, and thus the directivity as the antenna cannot be sufficiently improved.
　本発明の目的は、従来よりもアンテナとしての指向性を高めるための技術を提供することである。 An object of the present invention is to provide a technique for improving the directivity as an antenna as compared with the prior art.
　本発明の第１局面は、誘電性の板状の基板に、導電性のアンテナパターンを形成してなるアンテナである。アンテナパターンは、基板における長さ方向の一端側に向けて細くなった第１及び第２のテーパー領域を幅方向に間隔を隔てて有するテーパー部と、テーパー部の第１及び第２のテーパー領域の一部から、基板における長さ方向の一端に向けて延びる一対の延出部と、前記延出部それぞれから一対の延出部に挟まれた領域に向けて延びる複数の突起を、前記長さ方向に沿って配置したコルゲート構造の突起部と、を備えている。 The first aspect of the present invention is an antenna formed by forming a conductive antenna pattern on a dielectric plate-like substrate. The antenna pattern includes a tapered portion having first and second tapered regions that are narrowed toward one end side in the length direction of the substrate, and a first and second tapered region of the tapered portion that are spaced apart in the width direction. A pair of extending portions extending from one part to one end in the length direction of the substrate, and a plurality of protrusions extending from each of the extending portions toward a region sandwiched between the pair of extending portions. And a corrugated protrusion disposed along the vertical direction.
　この構成における延出部は、原則、長くなるほどアンテナとしての指向性が高まるように作用するため、充分に指向性を高められる程度の長さだけ延びたものとすればよい。
　また、突起部における各突起は、送信または受信する電波の波長に応じた長さ（＝λ／４）だけ突出したものとすることが指向性を高めるうえで望ましい。 In principle, the extending portion in this configuration acts so that the directivity as the antenna increases as the length increases, and therefore, the extending portion may be extended by a length that can sufficiently enhance the directivity.
In addition, it is desirable for improving the directivity that each protrusion in the protrusion protrudes by a length (= λ / 4) corresponding to the wavelength of a radio wave to be transmitted or received.
　また、上記アンテナパターンにおけるテーパー部は、具体的な形状については特に限定されないが、上記構成を本発明の第２局面のようにすることが考えられる。
　本発明の第２局面のアンテナは、アンテナパターンにおいて、テーパー部の第１テーパー領域は、少なくとも、基板における幅方向の一端側において長さ方向の他端側から一端側に向けて延びる第１線と、第１線における長さ方向の一端から長さ方向の他端側および第１線を離れる方向に向けて延びる第２線とで囲まれた領域を有しており、テーパー部の第２テーパー領域は、基板における幅方向の他端側において長さ方向の他端側から一端側に向けて延びる第３線と、第３線における長さ方向の一端から長さ方向の他端側および第３線を離れる方向に向けて延びる第４線とで囲まれた領域を有している。延出部は、テーパー部における第１線および第３線の一端それぞれから、基板における長さ方向の一端に向けて延びている。 In addition, the taper portion in the antenna pattern is not particularly limited as to a specific shape, but it is conceivable that the above configuration is made as in the second aspect of the present invention.
In the antenna of the second aspect of the present invention, in the antenna pattern, the first taper region of the taper portion extends at least from one end side in the length direction toward the other end side in the width direction on the substrate. And a second line extending from one end in the length direction of the first line to the other end side in the length direction and the second line extending away from the first line. The taper region includes a third line extending from the other end side in the length direction toward the one end side on the other end side in the width direction of the substrate, the other end side in the length direction from one end in the length direction of the third line, and It has the area | region enclosed with the 4th line extended toward the direction which leaves | separates a 3rd line. The extending portion extends from one end of each of the first line and the third line in the tapered portion toward one end in the length direction of the substrate.
　また、この構成では、第１線および第３線の一端それぞれから延出部が延びる形状となるため、テーパー部から延出部に至る形状を一体的なものとすることができる。
　この構成におけるテーパー部のうち、第２線の他端と第４線の他端とは、それぞれが直接的に接続されてもよいし、別の線を介して間接的に接続されてもよい。 Moreover, in this structure, since the extension part becomes a shape extended from each one end of a 1st line and a 3rd line, the shape from a taper part to an extension part can be made integral.
Of the tapered portion in this configuration, the other end of the second line and the other end of the fourth line may be directly connected to each other, or may be indirectly connected via another line. .
　また、アンテナパターンにおける延出部同士の間隔は、送信または受信する電波の周波数などの使用環境に応じて最適な間隔とすればよく、具体的な間隔については特に限定されない。 Further, the interval between the extended portions in the antenna pattern may be an optimum interval according to the use environment such as the frequency of the radio wave to be transmitted or received, and the specific interval is not particularly limited.
　例えば、本発明の第３局面のように、アンテナパターンにおいて、一対の前記延出部それぞれの間隔は、所定の距離範囲内に設定されている、というようにすればよい。
　また、上記各構成においては、上記各構成を本発明の第４局面のようにすることが考えられる。 For example, as in the third aspect of the present invention, in the antenna pattern, the distance between each of the pair of extending portions may be set within a predetermined distance range.
Moreover, in each said structure, it is possible to make each said structure like the 4th aspect of this invention.
　本発明の第４の局面のアンテナは、アンテナパターンにおいて、テーパー部の第１テーパー領域は、第１テーパー領域における長さ方向の他端側かつ幅方向の一端側から、基板における幅方向の一端に向けて突出する第１スタブを有し、テーパー部の第２テーパー領域は、該第２テーパー領域における長さ方向の他端側かつ幅方向の他端側から、基板における幅方向の他端に向けて突出する第２スタブを有している。 In the antenna according to the fourth aspect of the present invention, in the antenna pattern, the first taper region of the taper portion is one end in the width direction on the substrate from the other end side in the length direction in the first taper region and one end side in the width direction. The second taper region of the taper portion extends from the other end side in the length direction and the other end side in the width direction of the second taper region to the other end in the width direction of the substrate. A second stub projecting toward the.
　この構成における第１，第２スタブについては、それぞれ送信または受信する電波の波長に応じた長さ（＝λ／４）だけ突出したものとすることが、テーパー部の外周面を流れる高周波電流の回り込みを防止して指向性を高めるうえで望ましい。 The first and second stubs in this configuration are projected by a length (= λ / 4) corresponding to the wavelength of the radio wave to be transmitted or received, respectively. It is desirable to prevent wraparound and increase directivity.
　また、上記各構成において、突起部の各突起は、延出部における一部領域にのみ配置されたものとしてもよいし、本発明の第５局面のように、アンテナパターンにおいて、突起部は、延出部のうち、少なくとも基板における長さ方向の一端に至る領域までにわたって突起が配置されていてもよい。 Further, in each of the above configurations, each protrusion of the protrusion may be arranged only in a partial region in the extension part, and as in the fifth aspect of the present invention, in the antenna pattern, the protrusion is Of the extending portion, the protrusion may be arranged over at least a region reaching one end in the length direction of the substrate.
　また、上述の各構成におけるテーパー部は、基板における表面または裏面のみに形成されていればよいが、各テーパー領域を表面および裏面それぞれに形成されたものとしてもよく、この場合、上記各構成を本発明の第６局面のようにすることが考えられる。 In addition, the tapered portion in each of the above-described configurations may be formed only on the front surface or the back surface of the substrate, but each tapered region may be formed on each of the front and back surfaces. The sixth aspect of the present invention can be considered.
　本発明の第６局面のアンテナでは、アンテナパターンにおいて、テーパー部の第１テーパー領域および、該第１テーパー領域から延びる延出部は、基板における表面に形成され、テーパー部の第２テーパー領域および、該第２テーパー領域から延びる延出部は、基板における裏面に形成されている。テーパー部は、基板の表面に第２テーパー領域を投影した場合または基板の裏面に第１テーパー領域を投影した場合に、基板における長さ方向の一端側に向いた開口を有する形状を有している。 In the antenna according to the sixth aspect of the present invention, in the antenna pattern, the first tapered region of the tapered portion and the extending portion extending from the first tapered region are formed on the surface of the substrate, and the second tapered region of the tapered portion and The extending portion extending from the second tapered region is formed on the back surface of the substrate. The tapered portion has a shape having an opening directed to one end side in the length direction of the substrate when the second tapered region is projected onto the front surface of the substrate or when the first tapered region is projected onto the back surface of the substrate. Yes.
　この構成において、テーパー部は、その具体的な割合や形状については特に限定されない。例えば、上記第２局面の構成のように、第１線～第４線で囲まれた領域をテーパー部とする場合であれば、第１線と第２線とで囲まれた領域と、第３線と第４線とで囲まれた領域とに２分割することが考えられる。 In this configuration, the taper portion is not particularly limited with respect to its specific ratio and shape. For example, as in the configuration of the second aspect described above, if the region surrounded by the first line to the fourth line is a tapered portion, the region surrounded by the first line and the second line, It is conceivable to divide the area into two areas surrounded by the third line and the fourth line.
　また、本発明の第７局面は、上記第１から第６のいずれかの局面に係るアンテナをｍ×ｎ（２≦ｍ，１≦ｎ）に配置したことを特徴とするセンサである。 The seventh aspect of the present invention is a sensor characterized in that the antenna according to any one of the first to sixth aspects is arranged in m × n (2 ≦ m, 1 ≦ n).
　第１局面のアンテナによれば、一対のテーパー部の一部から基板における長さ方向の一端に向けて一対の延出部が延びており、さらに、この延出部にコルゲート構造の突起部が設けられている。これら延出部および突起部により、電波の送信または受信に際して、電界分布が送信または受信方向以外へと拡がることが抑制されるため、アンテナとしての指向性を高めることができる。 According to the antenna of the first aspect, the pair of extending portions extends from one part of the pair of tapered portions toward one end in the length direction of the substrate, and the protruding portion of the corrugated structure is further formed on the extending portion. Is provided. These extending portions and projecting portions suppress the spread of the electric field distribution outside the transmission or reception direction during transmission or reception of radio waves, so that the directivity as an antenna can be improved.
　また、上述したアンテナは、一列または複数列にわたって配置し、それぞれに対象物から放射される電波を受信させることで、センサとして使用することも想定されており、この場合、各アンテナによる検出範囲が重ならないように間隔をあけて配置する必要がある。ところが、上記構成のように、アンテナとしての指向性が高ければ、各アンテナにより検出範囲を絞ることができるため、各アンテナの間隔を狭めた状態で配置することができ、結果的にセンサ全体としての小型化を実現できる。 In addition, it is also assumed that the antenna described above is used as a sensor by arranging the antennas in one or a plurality of rows and receiving radio waves radiated from the objects, and in this case, the detection range of each antenna is It is necessary to arrange them at intervals so as not to overlap. However, as in the above configuration, if the directivity as an antenna is high, the detection range can be narrowed by each antenna, so that the distance between the antennas can be narrowed, resulting in the entire sensor as a result. Can be reduced in size.
　さらに、上記構成では、延出部に設けられた突起部が、一対の延出部に挟まれた領域に向けて突起を突出させているため、一対の延出部に挟まれた領域から離れる方向に突起を突出させる場合に比べ、外側への突出物がなくなるという点で、アンテナ素子としての小型化はもちろん、センサとして使用する場合におけるセンサ全体としての小型化にも寄与するものとなっている。 Further, in the above configuration, since the protrusion provided on the extension part projects the protrusion toward the area sandwiched between the pair of extension parts, the protrusion is separated from the area sandwiched between the pair of extension parts. Compared with the case where the protrusion protrudes in the direction, there is no protrusion to the outside, which contributes not only to the miniaturization of the antenna element but also to the miniaturization of the entire sensor when used as a sensor. Yes.
　第２局面のアンテナであれば、第１線～第４線により囲まれた領域によりテーパー部を形成することができる。
　第３局面のアンテナであれば、延出部それぞれの間隔を、送信または受信する電波の周波数などの使用環境に応じて最適な間隔としておくことにより、使用環境に適した性能を発揮させることができる。 In the case of the antenna of the second aspect, the tapered portion can be formed by the region surrounded by the first line to the fourth line.
In the case of the antenna of the third aspect, it is possible to exhibit performance suitable for the usage environment by setting the interval between the extension portions to an optimum interval according to the usage environment such as the frequency of the radio wave to be transmitted or received. it can.
　第４局面のアンテナであれば、一対のテーパー領域における長さ方向の他端側から幅方向に突出する第１，第２スタブにより、電波の送信または受信に際して、電界分布が送信または受信方向以外へと拡がることが抑制されるため、アンテナとしての指向性をより高めることができる。 In the case of the antenna of the fourth aspect, the electric field distribution is not in the transmission or reception direction when the radio wave is transmitted or received by the first and second stubs projecting in the width direction from the other end in the length direction in the pair of tapered regions. Therefore, the directivity as an antenna can be further increased.
　第５局面のアンテナであれば、基板における長さ方向の一端側に至る延出部の領域にわたって配置された突起部により、電波の送信または受信に際して、電波の送信または受信に際して、電界分布が送信または受信方向以外へと拡がることを抑制することができる。 In the case of the antenna of the fifth aspect, the electric field distribution is transmitted at the time of transmission or reception of the radio wave by the protrusion disposed over the region of the extending portion extending to one end side in the length direction of the substrate. Or it can suppress expanding to other than a receiving direction.
　第６局面のアンテナであれば、基板の表裏両面にアンテナパターンを形成することにより、パターン形成の自由度を高めることができる。
　第７局面のセンサであれば、上記各構成と同様の作用、効果を得ることができる。 If it is the antenna of 6th aspect, the freedom degree of pattern formation can be raised by forming an antenna pattern in the front and back both surfaces of a board | substrate.
If it is a sensor of the 7th situation, the same operation and effect as each above-mentioned composition can be acquired.
アンテナとセンサの構成を示す図であり、図１Ａは、アンテナの全体を示す図であり、図１Ｂは、センサを示す図である。It is a figure which shows the structure of an antenna and a sensor, FIG. 1A is a figure which shows the whole antenna, and FIG. 1B is a figure which shows a sensor. アンテナパターンのテーパー部を示す図である。It is a figure which shows the taper part of an antenna pattern. アンテナの表面および裏面を示す図である。It is a figure which shows the surface and back surface of an antenna. アンテナの具体的な寸法例を示す図である。It is a figure which shows the specific example of a dimension of an antenna. 別の実施形態におけるアンテナパターンのテーパー部を示す図である。It is a figure which shows the taper part of the antenna pattern in another embodiment. 更に別の実施形態におけるアンテナパターンのテーパー部を示す図である。It is a figure which shows the taper part of the antenna pattern in another embodiment. 別の実施形態におけるアンテナを示す図である。It is a figure which shows the antenna in another embodiment. 更に別の実施形態におけるアンテナパターンの突起部を示す図である。It is a figure which shows the protrusion part of the antenna pattern in another embodiment.
　１…アンテナ、２…センサ、１０…基板、１１…長さ方向の一端、１３…幅方向の一端、１５…長さ方向の他端、１７…幅方向の他端、２０…アンテナパターン、２１…開口、２３…テーパー部、２５…延出部、２７…突起部、３１…第１線、３３…第２線、３５…第３線、３７…第４線、４１…第１スタブ、４３…第２スタブ、４５ａ…スタブ、４９ａ…スリット、４９ｂ…スリット、５２…給電線、５４…接地部、６２…プローブ DESCRIPTION OF SYMBOLS 1 ... Antenna, 2 ... Sensor, 10 ... Board | substrate, 11 ... One end of length direction, 13 ... One end of width direction, 15 ... Other end of length direction, 17 ... Other end of width direction, 20 ... Antenna pattern, 21 ... Opening, 23 ... Tapered portion, 25 ... Extending portion, 27 ... Protruding portion, 31 ... First line, 33 ... Second line, 35 ... Third line, 37 ... Fourth line, 41 ... First stub, 43 ... second stub, 45a ... stub, 49a ... slit, 49b ... slit, 52 ... feed line, 54 ... grounding part, 62 ... probe
　以下に本発明の実施形態を図面と共に説明する。
（１）全体構成
　アンテナ１は、図１Ａ，１Ｂに示すように、誘電性の板状の基板１０に、導電性のアンテナパターン２０を形成したものであり、これらアンテナ１をｍ×ｎ（２≦ｍ，１≦ｎ）に配置することでセンサ２を構成可能なものである。 Embodiments of the present invention will be described below with reference to the drawings.
(1) Overall Configuration As shown in FIGS. 1A and 1B, the antenna 1 is formed by forming a conductive antenna pattern 20 on a dielectric plate-like substrate 10, and these antennas 1 are m × n (2 ≦ m, 1 ≦ n), the sensor 2 can be configured.
　基板１０は、それぞれ交差する二方向のうち、一方を長さ方向（図１における左右方向）とし、他方を幅方向（図１における上下方向）として拡がる面を有する板状の部材であり、本実施形態では、長さ方向に延びる長方形となっている。なお、この基板１０は、アンテナ１全体を小型化するという観点でみると、誘電率の高い素材を用いることが望ましい。 The substrate 10 is a plate-like member having a surface that extends in one of the two directions intersecting each other in the length direction (left-right direction in FIG. 1) and the other in the width direction (up-down direction in FIG. 1). In the embodiment, it is a rectangle extending in the length direction. The substrate 10 is preferably made of a material having a high dielectric constant from the viewpoint of downsizing the entire antenna 1.
　アンテナパターン２０は、基板１０における長さ方向の一端１１側に向いた開口２１を有するテーパー部２３と、テーパー部２３において幅方向に開口２１を挟む２箇所それぞれから、基板１０における長さ方向の一端１１に向けて延びる一対の延出部２５と、延出部２５それぞれから一対の延出部２５に挟まれた領域に向けて延びる突起を、長さ方向に沿って複数配置したコルゲート構造の突起部２７と、を備えている。 The antenna pattern 20 includes a tapered portion 23 having an opening 21 facing the one end 11 side in the length direction of the substrate 10, and two locations sandwiching the opening 21 in the width direction of the tapered portion 23 in the length direction of the substrate 10. A corrugated structure in which a pair of extending portions 25 extending toward one end 11 and a plurality of protrusions extending from each of the extending portions 25 toward a region sandwiched between the pair of extending portions 25 are arranged along the length direction. And a protrusion 27.
　これらのうち、テーパー部２３は、図２に示すように、少なくとも、基板１０における幅方向の一端１３側において長さ方向の他端１５側から一端１１側に向けて延びる第１線３１と、第１線３１における長さ方向の一端から長さ方向の他端側および第１線３１を離れる方向に向けて延びる第２線３３とで囲まれた領域と、基板１０における幅方向の他端１７側において長さ方向の他端１５側から一端１１側に向けて延びる第３線３５と、第３線３５における長さ方向の一端から長さ方向の他端側および第３線３５を離れる方向に向けて延びる第４線３７と、で囲まれた領域とを形成している。なお、本実施形態において、第１線３１～第４線３７は全て直線となっているが、これらは、直線以外の線となっていてもよい。 Among these, as shown in FIG. 2, the tapered portion 23 includes at least a first line 31 extending from the other end 15 side in the length direction toward the one end 11 side on the one end 13 side in the width direction of the substrate 10; A region surrounded by one end of the first line 31 in the length direction from the other end side in the length direction and the second line 33 extending in a direction away from the first line 31, and the other end in the width direction of the substrate 10 On the 17th side, the third line 35 extending from the other end 15 side in the length direction toward the one end 11 side, and the other end side in the length direction and the third line 35 are separated from one end in the length direction of the third line 35. A region surrounded by a fourth line 37 extending in the direction is formed. In the present embodiment, the first line 31 to the fourth line 37 are all straight lines, but these may be lines other than the straight lines.
　また、延出部２５は、スリット部２３における第１線３１および第３線３５の一端それぞれから、基板１０における長さ方向の一端１１に向けて延びている。これら延出部２５は、原則、長くなるほどアンテナとしての指向性が高まるように作用するため、充分に指向性を高められる程度の長さだけ延びたものとなっている。この延出部２５同士の間隔は、空間インピーダンスとの整合を重視する場合であれば、他端側よりも一端側が広くなるように配置され、指向性を絞り込むことを重視する場合であれば、一端から他端までが平行に延びるような位置関係で配置される。 Further, the extending portion 25 extends from one end of each of the first line 31 and the third line 35 in the slit portion 23 toward one end 11 in the length direction of the substrate 10. In principle, these extending portions 25 act so that the directivity as an antenna increases as the length increases, and thus the extended portions 25 extend by a length that can sufficiently increase the directivity. If the distance between the extension portions 25 is a case where importance is placed on matching with the spatial impedance, it is arranged so that one end side is wider than the other end side, and if importance is placed on narrowing the directivity, They are arranged in a positional relationship such that one end to the other end extends in parallel.
　なお、本実施形態において、延出部２５は、基板１０における幅方向それぞれの端部１３，１７から一定距離だけ幅方向の中心側へズラされた位置に配置されている。
　また、一対の延出部２５それぞれの間隔は、所定の距離範囲内に設定されている。この所定範囲は、送信または受信する電波の周波数などの使用環境に応じて最適な間隔としてあらかじめ定められたものである。 In the present embodiment, the extending portion 25 is disposed at a position shifted from the respective end portions 13 and 17 in the width direction of the substrate 10 to the center side in the width direction by a predetermined distance.
Further, the interval between the pair of extending portions 25 is set within a predetermined distance range. This predetermined range is determined in advance as an optimum interval according to the use environment such as the frequency of radio waves to be transmitted or received.
　また、突起部２７は、延出部２５のうち、基板１０における長さ方向の一端１１に至る領域までにわたって突起が配置された構成となっている。これら突起それぞれは、送信または受信する電波の波長に応じた長さ（＝λ／４）だけ突出したものとされている。 Further, the protrusion 27 has a configuration in which the protrusion is arranged over the extended portion 25 up to a region reaching the one end 11 in the length direction of the substrate 10. Each of these protrusions protrudes by a length (= λ / 4) corresponding to the wavelength of a radio wave to be transmitted or received.
　さらに、テーパー部２３には、テーパー部２３における長さ方向の他端側かつ幅方向の一端側から、基板１０における幅方向の一端１３に向けて突出する第１スタブ４１と、テーパー部２３における長さ方向の他端側かつ幅方向の他端側から、基板１０における幅方向の他端１５に向けて突出する第２スタブ４３と、を有している。これら第１，第２スタブ４１，４３については、それぞれ送信または受信する電波の波長に応じた長さ（＝λ／４）だけ突出したものとされている。 Further, the tapered portion 23 includes a first stub 41 that protrudes from the other end side in the length direction and one end side in the width direction of the taper portion 23 toward the one end 13 in the width direction of the substrate 10, and in the taper portion 23. And a second stub 43 that protrudes from the other end in the length direction and the other end in the width direction toward the other end 15 in the width direction of the substrate 10. The first and second stubs 41 and 43 are projected by a length (= λ / 4) corresponding to the wavelength of a radio wave to be transmitted or received.
　ところで、本実施形態におけるアンテナパターン２０は、図３に示すように、テーパー部２３の幅方向を所定割合で２分割した一方のテーパー領域２３ａ、および、テーパー領域２３ａから延びる延出部２５ａが、基板１０における表面に形成されており、２分割した他方のテーパー領域２３ｂ、および、テーパー領域２３ｂから延びる延出部２５ｂが、基板１０における裏面に形成されている。ここで、テーパー部２３は、第１線３１および第２線３３で囲まれた領域と、第３線３５および第４線３７で囲まれた領域と、に分かれている。 By the way, as shown in FIG. 3, the antenna pattern 20 in this embodiment includes one tapered region 23a obtained by dividing the width direction of the tapered portion 23 into two at a predetermined ratio, and an extending portion 25a extending from the tapered region 23a. The other tapered region 23b divided in two and the extending portion 25b extending from the tapered region 23b are formed on the back surface of the substrate 10. Here, the tapered portion 23 is divided into a region surrounded by the first line 31 and the second line 33 and a region surrounded by the third line 35 and the fourth line 37.
　つまり、テーパー部２３は、基板１０の表面に他方のテーパー領域２３ｂを投影した場合または基板１０の裏面に一方のテーパー領域２３ａを投影した場合に、基板１０における長さ方向の一端１１側に向いた開口２１を有する形状が形成されることになる。本実施形態においては、基板１０に透過性の素材を用いているため、外見上、基板１０における長さ方向の一端１１側に向いた開口２１を有する形状が形成されている。 That is, the tapered portion 23 is directed toward the one end 11 side in the length direction of the substrate 10 when the other tapered region 23b is projected on the front surface of the substrate 10 or when one tapered region 23a is projected on the rear surface of the substrate 10. A shape having the opening 21 is formed. In the present embodiment, since a transparent material is used for the substrate 10, a shape having an opening 21 facing the one end 11 side in the length direction of the substrate 10 is formed.
　また、テーパー領域２３ａには、テーパー領域２３ａの他端から基板１０の他端まで線状に延びる給電線５２が接続されており、テーパー領域２３ｂには、テーパー領域２３ｂの他端から基板１０の他端まで面状に拡がる接地部５４が接続されている。 The taper region 23a is connected to a power supply line 52 extending linearly from the other end of the taper region 23a to the other end of the substrate 10. The taper region 23b is connected to the taper region 23b from the other end of the taper region 23b. A grounding portion 54 extending in a planar shape to the other end is connected.
　なお、アンテナ１は、接地部５４が受信機側または送信機側の接地面に接続され、給電線５２が受信機側または送信機側の増幅器に接続された状態で使用される。より具体的な例として、送受信機に用いられる場合であれば、接地部５４および給電線５２は、サーキュレータやスイッチング回路に接続されることになる。 The antenna 1 is used in a state where the grounding portion 54 is connected to the ground surface on the receiver side or the transmitter side, and the feeder line 52 is connected to the amplifier on the receiver side or the transmitter side. As a more specific example, when used in a transceiver, the grounding unit 54 and the power supply line 52 are connected to a circulator or a switching circuit.
　上記構成に係るアンテナ１については、アンテナ１により送信または受信する電波の周波数を７５ＧＨｚとし、アンテナ１の先端（基板１０における長さ方向の一端１１）から対象物までの距離を２λとした環境での使用が想定されており、この場合、図４に示すように、各構成要素の寸法として下記の値が選択することが考えられる。なお、下記構成要素それぞれの寸法は、使用環境に応じて最適な値が変わりうるものであり、本発明の構成要素における寸法を以下の値に限定することを意味するものではない。 In the antenna 1 having the above configuration, the frequency of the radio wave transmitted or received by the antenna 1 is 75 GHz, and the distance from the tip of the antenna 1 (one end 11 in the length direction of the substrate 10) to the object is 2λ. In this case, as shown in FIG. 4, it is conceivable that the following values are selected as the dimensions of each component. In addition, the dimension of each of the following constituent elements can change an optimum value depending on the use environment, and does not mean that the dimensions of the constituent elements of the present invention are limited to the following values.
　まず、基板１０は、長さとして３８ｍｍ、幅として４ｍｍ、板厚として０．０５ｍｍを選択することが考えられる。また、スリット部２３は、長さとして８．５ｍｍを選択することが考えられる。また、延出部２５は、長さとして１６．５ｍｍが選択され、延出部２５それぞれの間隔として２．８５ｍｍまたは２．６５ｍｍが選択されており、基板１０の端部１３，１７からの距離として０．６ｍｍを選択することが考えられる。 First, the substrate 10 may be 38 mm in length, 4 mm in width, and 0.05 mm in plate thickness. In addition, it is conceivable that the slit portion 23 has a length of 8.5 mm. In addition, the extending portion 25 is selected to have a length of 16.5 mm, and the distance between the extending portions 25 is selected to be 2.85 mm or 2.65 mm, and the distance from the end portions 13 and 17 of the substrate 10. It can be considered that 0.6 mm is selected.
　なお、上述した使用環境において、（ａ）従来のアンテナ、（ｂ）上記実施形態のアンテナ１において延出部２５それぞれの間隔に２．８５ｍｍを選択し、かつ、第１，第２スタブ４１，４３が備えられていない場合、（ｃ）同アンテナ１において延出部２５それぞれの間隔に２．８５ｍｍを選択した場合、（ｄ）同アンテナ１において延出部２５それぞれの間隔に２．６５ｍｍを選択した場合、についてのＶＳＷＲは、（ａ）３．３４、（ｂ）２．７９、（ｃ）２．６１、（ｄ）１．３６、となり、上記実施形態の構成はいずれも従来のアンテナに比べて改善傾向を示している。
（２）作用，効果
　上記実施形態のアンテナ１によれば、テーパー部２３において幅方向に開口２１を挟む２箇所それぞれから、基板１０における長さ方向の一端１１に向けて延出部２５が延びており、さらに、この延出部２５にコルゲート構造の突起部２７が設けられている。 In the use environment described above, (a) the conventional antenna, (b) 2.85 mm is selected as the interval between the extending portions 25 in the antenna 1 of the above embodiment, and the first and second stubs 41, 43 is not provided, (c) when 2.85 mm is selected as the interval between the extending portions 25 in the antenna 1, (d) 2.65 mm is set as the interval between the extending portions 25 in the antenna 1. When selected, the VSWR is (a) 3.34, (b) 2.79, (c) 2.61, and (d) 1.36, and the configurations of the above embodiments are all conventional antennas. It shows an improvement trend compared to.
(2) Action and Effect According to the antenna 1 of the above-described embodiment, the extending portion 25 extends from the two portions of the tapered portion 23 that sandwich the opening 21 in the width direction toward the one end 11 in the length direction of the substrate 10. Furthermore, a corrugated protrusion 27 is provided on the extension 25.
　これら延出部２５および突起部２７により、電波の送信または受信に際して、電界分布が送信または受信方向以外へと拡がることが抑制されるため、アンテナ１としての指向性を高めることができる。 Since the extension portion 25 and the projection portion 27 suppress the spread of the electric field distribution outside the transmission or reception direction when transmitting or receiving radio waves, the directivity as the antenna 1 can be enhanced.
　また、この種のアンテナは、一列または複数列にわたって配置し、それぞれに対象物から放射される電波を受信させることで、センサ２として使用することも想定されており、この場合、各アンテナによる検出範囲が重ならないように間隔をあけて配置する必要がある。ところが、上記実施形態のように、アンテナとしての指向性が高ければ、各アンテナ１により検出範囲を絞ることができるため、各アンテナ１の間隔を狭めた状態で配置することができ、結果的にセンサ２全体としての小型化を実現できる。 In addition, this type of antenna is also assumed to be used as the sensor 2 by arranging the antennas in one or a plurality of rows and receiving radio waves radiated from the objects, and in this case, detection by each antenna is assumed. It is necessary to arrange them so that the ranges do not overlap. However, as in the above-described embodiment, if the directivity as an antenna is high, the detection range can be narrowed by each antenna 1, so that the antennas 1 can be arranged with the interval between them narrowed. Miniaturization of the sensor 2 as a whole can be realized.
　さらに、上記実施形態では、延出部２５に設けられた突起部２７が、一対の延出部２５に挟まれた領域に向けて突起を突出させているため、一対の延出部２５に挟まれた領域から離れる方向に突起を突出させる場合に比べ、外側への突出物がなくなるという点で、アンテナ素子としての小型化はもちろん、センサ２として使用する場合におけるセンサ２全体としての小型化にも寄与するものとなっている。 Furthermore, in the above-described embodiment, since the protrusions 27 provided on the extension portions 25 project the protrusions toward the region sandwiched between the pair of extension portions 25, the protrusions 27 are sandwiched between the pair of extension portions 25. Compared with the case where the protrusion is protruded in the direction away from the region, there is no protrusion to the outside, so that not only the antenna element can be miniaturized, but also the sensor 2 as a whole can be miniaturized. Has also contributed.
　また、上記実施形態においては、第１線３１～第４線３７により囲まれた領域によりテーパー部２３を形成することができる。
　また、第１線３１および第３線３５の一端それぞれから延出部２５が延びる形状となるため、テーパー部２３から延出部２５に至る形状を一体的なものとすることができる。 In the above embodiment, the tapered portion 23 can be formed by a region surrounded by the first line 31 to the fourth line 37.
Moreover, since the extension part 25 becomes a shape extended from each one end of the 1st line 31 and the 3rd line 35, the shape from the taper part 23 to the extension part 25 can be made integral.
　また、上記実施形態においては、延出部２５それぞれの間隔を、送信または受信する電波の周波数などの使用環境に応じて最適な間隔としておくことにより、使用環境に適した性能を発揮させることができる。 Moreover, in the said embodiment, by setting the space | interval of each extension part 25 as an optimal space | interval according to use environments, such as the frequency of the radio wave to transmit or receive, the performance suitable for a use environment can be exhibited. it can.
　また、上記実施形態においては、テーパー部２３における長さ方向の他端側から幅方向に突出する第１，第２スタブ４１，４３により、電波の送信または受信に際して、電界分布が送信または受信方向以外へと拡がることが抑制されるため、アンテナ１としての指向性をより高めることができる。 In the above-described embodiment, the first and second stubs 41 and 43 projecting in the width direction from the other end in the length direction of the tapered portion 23 cause the electric field distribution to be transmitted or received in the transmission or reception direction. Since it is suppressed that it spreads to other than, the directivity as the antenna 1 can be improved more.
　また、上記実施形態においは、基板１０における長さ方向の一端１１側に至る延出部２５の領域にわたって配置された突起部２７により、電波の送信または受信に際して、電波の送信または受信に際して、電界分布が送信または受信方向以外へと拡がることを抑制することができる。 Further, in the above-described embodiment, the projection 27 disposed over the region of the extending portion 25 reaching the one end 11 side in the length direction of the substrate 10 causes an electric field to be transmitted or received when transmitting or receiving radio waves. It is possible to suppress the distribution from spreading outside the transmission or reception direction.
　また、上記実施形態においては、基板１０の表裏両面にアンテナパターン２０を形成することにより、パターン形成の自由度を高めることができる。
（３）変形例
　以上、本発明の実施の形態について説明したが、本発明は、上記実施形態に何ら限定されることはなく、本発明の技術的範囲に属する限り種々の形態をとり得ることはいうまでもない。 Moreover, in the said embodiment, the freedom degree of pattern formation can be raised by forming the antenna pattern 20 in the front and back both surfaces of the board | substrate 10. FIG.
(3) Modifications Embodiments of the present invention have been described above, but the present invention is not limited to the above-described embodiments, and can take various forms as long as they belong to the technical scope of the present invention. Needless to say.
　例えば、上記実施形態においては、基板１０が長さ方向に延びる長方形となっている構成を例示したが、基板１０については、それぞれ交差する二方向に拡がる面を有する板状の部材であればよく、長方形以外の形状であってもよい。 For example, in the said embodiment, although the board | substrate 10 illustrated the structure which becomes the rectangle extended in a length direction, about the board | substrate 10, what is necessary is just a plate-shaped member which has the surface expanded to two directions which cross | intersect, respectively. The shape may be other than a rectangle.
　また、上記実施形態においては、テーパー部２３における第２線３３の他端と第４線３７の他端とがそれぞれ直接的に接続されている構成を例示したが、別の線を介して間接的に接続された構成としてもよい。 Moreover, in the said embodiment, although the other end of the 2nd line 33 in the taper part 23 and the other end of the 4th line 37 were each directly connected, it illustrated indirectly through another line. It is good also as the structure connected in general.
　また、上記実施形態においては、２分割したテーパー領域２３ａ，２３ｂを基板１０における表裏それぞれの面に形成した構成を例示したが、テーパー部２３は、基板１０における長さ方向の一端１１側に向いた開口２１を有する形状を形成するものであれば、基板１０における表面にのみ形成した構成としてもよく、また、３分割以上に分けたものを表裏の各面に形成した構成としてもよい。 Moreover, in the said embodiment, although the structure which formed the taper area | regions 23a and 23b divided into 2 in each surface of the front and back in the board | substrate 10 was illustrated, the taper part 23 is suitable for the one end 11 side of the length direction in the board | substrate 10. As long as the shape having the opening 21 is formed, a structure formed only on the surface of the substrate 10 may be used, or a structure divided into three or more parts may be formed on the front and back surfaces.
　また、上記実施形態において、突起部２７は、延出部２５のうち、基板１０における長さ方向の一端１１に至る領域までにわたって突起が配置されていればよく、延出部２５とテーパー部２３との接点から突起が配置された構成としてもよいし、その接点から基板の一端１１に向かう所定距離だけ離れた箇所から突起が配置された構成としてもよい。 Moreover, in the said embodiment, the protrusion part 27 should just be arrange | positioned over the area | region which reaches the end 11 of the length direction in the board | substrate 10 among the extension parts 25, and the extension part 25 and the taper part 23 are sufficient as it. The projection may be arranged from the contact with the projection, or the projection may be arranged from a location away from the contact by a predetermined distance toward the one end 11 of the substrate.
　また、上記実施形態において、テーパー部２３に設けられた第１，第２スタブ４１，４３は、基板１０における幅方向の一端１３または他端１７に向けて突出するように構成されているものを例示したが、テーパー部２３の外周面を流れる高周波電流の回り込みを防止することができればよく、これ以外の構成とすることも考えられる。 Moreover, in the said embodiment, the 1st, 2nd stub 41,43 provided in the taper part 23 is what is comprised so that it may protrude toward the one end 13 or the other end 17 of the width direction in the board | substrate 10. Although illustrated, it is only necessary to prevent the high-frequency current flowing around the outer peripheral surface of the tapered portion 23 from flowing around, and other configurations are also conceivable.
　具体的な例としては、図５Ａに示すように、テーパー領域２３ａ，２３ｂの他端から長さ方向に突出する構成のスタブ４５ａ，４５ｂ、図５Ｂに示すように、テーパー部２３の他端側から斜め方向に形成されたスリット４９ａ，４９ｂ、などが考えられる。 As a specific example, as shown in FIG. 5A, stubs 45a and 45b having a configuration protruding in the length direction from the other ends of the tapered regions 23a and 23b, and the other end side of the tapered portion 23 as shown in FIG. 5B. The slits 49a and 49b formed in an oblique direction can be considered.
　また、上記実施形態において、突起部２７の突起それぞれは、延出部２５から基板１０の幅方向に沿って真っ直ぐ延びている構成を例示したが、例えば、指向性を充分に絞り込むことができる程度に、基板１０の幅方向に対して斜め、または、曲線状に延びる構成としてもよい。 Moreover, in the said embodiment, although each protrusion of the protrusion part 27 illustrated the structure extended straight along the width direction of the board | substrate 10 from the extension part 25, it is a grade which can narrow down directivity enough, for example. In addition, it may be configured to extend obliquely or curvedly with respect to the width direction of the substrate 10.
　また、上記実施形態においては、テーパー部２３が略Ｖ字状に開口し、他端側が基板１０の幅方向に対して斜めになっている構成を例示したが、このテーパー部２３の開口は、図６に示すように、他端側が基板１０の幅方向に延びる平面状の終端壁２３ｃとなっていてもよい。 Moreover, in the said embodiment, although the taper part 23 opened to substantially V shape and illustrated the structure which the other end side is slanting with respect to the width direction of the board | substrate 10, opening of this taper part 23 is as follows. As shown in FIG. 6, the other end side may be a planar end wall 23 c extending in the width direction of the substrate 10.
　この場合、図７Ａ，７Ｂに示すように、基板１０における表面にのみテーパー部２３を形成し、裏面にテーパー部２３と電気的に接続されていないプローブ６２を形成することが、交差偏波特性を向上させる意味で好適である。なお、基板１０が多層基板の場合であれば、プローブ６２が形成された面については、テーパー部２３が形成されていない層の面として設けてもよい。 In this case, as shown in FIGS. 7A and 7B, it is possible to form the tapered portion 23 only on the front surface of the substrate 10 and to form the probe 62 not electrically connected to the tapered portion 23 on the back surface. This is preferable in terms of improving the properties. If the substrate 10 is a multilayer substrate, the surface on which the probe 62 is formed may be provided as the surface of the layer on which the tapered portion 23 is not formed.
　また、上記実施形態においては、全ての突起部２７が、送信または受信する１種類の電波における波長に応じた長さとなっている構成を例示したが、この突起部２７は、図８Ａ～８Ｃに示すように、複数種類の電波における電波それぞれに応じた長さとなっている複数の領域から構成されたものとしてもよい。ただし、突起部２７を複数の領域にて構成する場合には、延出部２５の一端に位置する領域を、最も低い周波数の電波に応じた長さとする（具体的には、最も長くする）ことが望ましい。図８Ａにおいて、２７a1及び２７b1は、高周波用突起部を表し、２７a2及び２７b2は、低周波用突起部を表している。また、図８Ｂ、図８Ｃにおいて、２７ai及び２７biは、高周波用突起部を表し、２７aii及び２７biiは、中周波用突起部を表し、２７aiii及び２７biiiは、低周波用突起部を表している。 Further, in the above-described embodiment, the configuration in which all the protrusions 27 have a length corresponding to the wavelength in one type of radio wave to be transmitted or received is illustrated, but the protrusions 27 are illustrated in FIGS. 8A to 8C. As shown, it may be composed of a plurality of regions each having a length corresponding to each of a plurality of types of radio waves. However, when the protrusion 27 is configured by a plurality of regions, the region located at one end of the extension 25 is set to a length corresponding to the lowest frequency radio wave (specifically, the longest). It is desirable. In FIG. 8A, 27 a1 and 27 b1 represent high-frequency protrusions, and 27 a2 and 27 b2 represent low-frequency protrusions. Further, FIG. 8B, in FIG. 8C, 27 ai and 27 bi represent the high frequency protrusion, 27 aii and 27 bii represent mid-frequency protrusion, 27 aiii and 27 biii is low frequency protrusion Represents.

Claims (7)

  1. 　アンテナであって、
    　それぞれ交差するニ方向のうち、一方を長さ方向とし、他方を幅方向として広がる面を有する誘電性の板状の基板と、
    　前記基板に設けられた導電性のアンテナパターンと、を備え、
    　　前記アンテナパターンは、
    　　前記基板における前記長さ方向の一端側に向けて細くなった第１及び第２のテーパー領域を前記幅方向に間隔を隔てて有するテーパー部と、
    　　前記テーパー部における前記第１及び第２のテーパー領域のそれぞれの一部から、前記基板における前記長さ方向の一端に向けて延びる一対の延出部と、
    　　前記延出部それぞれから一対の前記延出部に挟まれた領域に向けて延びる複数の突起を、前記長さ方向に沿って配置したコルゲート構造の突起部と、を備えた、アンテナ。     An antenna,
    A dielectric plate-like substrate having a surface that spreads in one of the two directions intersecting with each other in the length direction and the other in the width direction;
    A conductive antenna pattern provided on the substrate,
    The antenna pattern is
    A taper portion having first and second taper regions which are narrowed toward one end side in the length direction of the substrate and spaced apart in the width direction;
    A pair of extending portions extending from one part of each of the first and second tapered regions in the tapered portion toward one end in the length direction of the substrate;
    An antenna, comprising: a plurality of protrusions extending from each of the extending portions toward a region sandwiched between the pair of extending portions, the protruding portions having a corrugated structure arranged along the length direction.
  2. 　前記アンテナパターンにおいて、
    　前記テーパー部の第１テーパー領域は、少なくとも、前記基板における前記幅方向の一端側において前記長さ方向の他端側から一端側に向けて延びる第１線と、前記第１線における前記長さ方向の一端から前記長さ方向の他端側および前記第１線を離れる方向に向けて延びる第２線と、で囲まれた領域を有しており、前記テーパー部の第２テーパー領域は、少なくとも、前記基板における前記幅方向の他端側において前記長さ方向の他端側から一端側に向けて延びる第３線と、前記第３線における前記長さ方向の一端から前記長さ方向の他端側および前記第３線を離れる方向に向けて延びる第４線と、で囲まれた領域を有しており、
    　前記延出部は、前記テーパー部における前記第１線および前記第３線の一端それぞれから、前記基板における前記長さ方向の一端に向けて延びている、請求項１に記載のアンテナ。     In the antenna pattern,
    The first tapered region of the tapered portion includes at least a first line extending from the other end side in the length direction toward the one end side on the one end side in the width direction of the substrate, and the length in the first line. A second line extending from the one end in the direction toward the other end side in the length direction and the second line extending in a direction away from the first line, and the second taper region of the tapered portion is At least the third line extending from the other end side in the length direction toward the one end side at the other end side in the width direction of the substrate, and the length direction from one end of the length direction in the third line. And has a region surrounded by the other end side and a fourth line extending in a direction away from the third line,
    2. The antenna according to claim 1, wherein the extending portion extends from one end of each of the first line and the third line in the tapered portion toward one end in the length direction of the substrate.
  3. 　前記アンテナパターンにおいて、
    　一対の前記延出部の間隔は、所定の距離範囲内に設定されている、請求項２に記載のアンテナ。     In the antenna pattern,
    The antenna according to claim 2, wherein an interval between the pair of extending portions is set within a predetermined distance range.
  4. 　前記アンテナパターンにおいて、
    　前記テーパー部の第１テーパー領域は、該第１テーパー領域における前記長さ方向の他端側かつ前記幅方向の一端側から、前記基板における前記幅方向の一端に向けて突出する第１スタブを有し、前記テーパー部の第２テーパー領域は、該第２テーパー領域における前記長さ方向の他端側かつ前記幅方向の他端側から、前記基板における前記幅方向の他端に向けて突出する第２スタブを有している、請求項１から３のいずれかに記載のアンテナ。     In the antenna pattern,
    The first taper region of the taper portion includes a first stub that protrudes from one end side in the length direction and one end side in the width direction in the first taper region toward one end in the width direction in the substrate. And the second taper region of the tapered portion protrudes from the other end side in the length direction and the other end side in the width direction in the second taper region toward the other end in the width direction in the substrate. The antenna according to claim 1, further comprising a second stub.
  5. 　前記アンテナパターンにおいて、
    　前記突起部は、前記延出部のうち、少なくとも前記基板における前記長さ方向の一端に至る領域までにわたって突起が配置されている、請求項１から４のいずれかに記載のアンテナ。     In the antenna pattern,
    The antenna according to any one of claims 1 to 4, wherein the protrusion is disposed so as to extend to at least a region of the extended portion that extends to one end in the length direction of the substrate.
  6. 　前記アンテナパターンにおいて、
    　前記テーパー部の第１テーパー領域、および、該第１テーパー領域から延びる前記延出部は、前記基板における表面に形成され、前記テーパー部の第２テーパー領域、および、該第２テーパー領域から延びる前記延出部は、前記基板における前記表面とは反対の裏面に形成されており、
    　前記テーパー部は、前記基板の表面に前記第２テーパー領域を投影した場合または前記基板の裏面に前記第１テーパー領域を投影した場合に、前記基板における前記長さ方向の一端側に向いた開口を有する形状である、請求項１から５のいずれかに記載のアンテナ。     In the antenna pattern,
    The first tapered region of the tapered portion and the extending portion extending from the first tapered region are formed on the surface of the substrate and extend from the second tapered region of the tapered portion and the second tapered region. The extension portion is formed on the back surface of the substrate opposite to the front surface,
    The tapered portion is an opening facing one end side in the length direction of the substrate when the second tapered region is projected onto the front surface of the substrate or when the first tapered region is projected onto the back surface of the substrate. The antenna according to claim 1, wherein the antenna has a shape having
  7. 　請求項１から６のいずれかに記載のアンテナをｍ×ｎ（２≦ｍ，１≦ｎ）に配置した、センサ。 A sensor in which the antenna according to any one of claims 1 to 6 is arranged in m × n (2 ≦ m, 1 ≦ n).
PCT/JP2011/058258 2010-03-31 2011-03-31 Antenna and sensor WO2011125857A1 (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11163626A (en) * 1997-08-11 1999-06-18 Ricoh Co Ltd Tapered slot antenna
JP2000031727A (en) * 1998-07-07 2000-01-28 Ricoh Co Ltd Tapered slot antenna, linear antenna array and two- dimensional antenna array
JP2007116205A (en) * 2004-03-02 2007-05-10 Japan Science & Technology Agency Method and program for designing broadband fermi antenna
JP2009130433A (en) * 2007-11-20 2009-06-11 Nippon Telegr & Teleph Corp <Ntt> Flat antenna

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11163626A (en) * 1997-08-11 1999-06-18 Ricoh Co Ltd Tapered slot antenna
JP2000031727A (en) * 1998-07-07 2000-01-28 Ricoh Co Ltd Tapered slot antenna, linear antenna array and two- dimensional antenna array
JP2007116205A (en) * 2004-03-02 2007-05-10 Japan Science & Technology Agency Method and program for designing broadband fermi antenna
JP2009130433A (en) * 2007-11-20 2009-06-11 Nippon Telegr & Teleph Corp <Ntt> Flat antenna

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