WO2011125857A1 - Antenne et capteur - Google Patents

Antenne et capteur Download PDF

Info

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
Authority
WO
WIPO (PCT)
Prior art keywords
substrate
antenna
length direction
region
line
Prior art date
Application number
PCT/JP2011/058258
Other languages
English (en)
Japanese (ja)
Inventor
康太 山田
大輔 遠松
順 植村
正裕 大津
Original Assignee
マスプロ電工株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by マスプロ電工株式会社 filed Critical マスプロ電工株式会社
Publication of WO2011125857A1 publication Critical patent/WO2011125857A1/fr

Links

Images

Classifications

    • 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.

Landscapes

  • Waveguide Aerials (AREA)
  • Details Of Aerials (AREA)

Abstract

L'invention porte sur une antenne comprenant un substrat diélectrique plat et un motif d'antenne conducteur placé sur ledit substrat. Le motif d'antenne comprend : une section effilée qui a des première et seconde régions effilées qui diminuent en largeur vers une extrémité dans le sens de la longueur du substrat ; une paire de sections d'extension qui s'étendent vers une extrémité dans le sens de la longueur du substrat, à partir des parties des première et seconde régions effilées dans la section effilée, respectivement ; et des sections saillantes ondulées dans lesquelles une pluralité de saillies, disposées le long de la direction longitudinale mentionnée ci-dessus, s'étendent à partir des sections d'extension vers une région prise en sandwich par la paire de sections d'extension.
PCT/JP2011/058258 2010-03-31 2011-03-31 Antenne et capteur WO2011125857A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2010083243A JP5485771B2 (ja) 2010-03-31 2010-03-31 アンテナおよびセンサ
JP2010-083243 2010-03-31

Publications (1)

Publication Number Publication Date
WO2011125857A1 true WO2011125857A1 (fr) 2011-10-13

Family

ID=44762795

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2011/058258 WO2011125857A1 (fr) 2010-03-31 2011-03-31 Antenne et capteur

Country Status (2)

Country Link
JP (1) JP5485771B2 (fr)
WO (1) WO2011125857A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11163626A (ja) * 1997-08-11 1999-06-18 Ricoh Co Ltd テーパードスロットアンテナ
JP2000031727A (ja) * 1998-07-07 2000-01-28 Ricoh Co Ltd テーパードスロットアンテナ，１次元アンテナアレイおよび２次元アンテナアレイ
JP2007116205A (ja) * 2004-03-02 2007-05-10 Japan Science & Technology Agency 広帯域フェルミアンテナの設計方法及び設計プログラム
JP2009130433A (ja) * 2007-11-20 2009-06-11 Nippon Telegr & Teleph Corp <Ntt> 平面アンテナ

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11163626A (ja) * 1997-08-11 1999-06-18 Ricoh Co Ltd テーパードスロットアンテナ
JP2000031727A (ja) * 1998-07-07 2000-01-28 Ricoh Co Ltd テーパードスロットアンテナ，１次元アンテナアレイおよび２次元アンテナアレイ
JP2007116205A (ja) * 2004-03-02 2007-05-10 Japan Science & Technology Agency 広帯域フェルミアンテナの設計方法及び設計プログラム
JP2009130433A (ja) * 2007-11-20 2009-06-11 Nippon Telegr & Teleph Corp <Ntt> 平面アンテナ

Also Published As

Publication number Publication date
JP5485771B2 (ja) 2014-05-07
JP2011217111A (ja) 2011-10-27

Similar Documents

Publication Publication Date Title
US11024955B2 (en) Antenna module and communication apparatus
US7528791B2 (en) Antenna structure having a feed element formed on an opposite surface of a substrate from a ground portion and a radiating element
US7498997B2 (en) Plate board type MIMO array antenna including isolation element
JP6748716B2 (ja) 自己接地型の壁面設置可能なボウタイアンテナ装置、同アンテナ装置のペタル、及びその製造方法
JP3725766B2 (ja) キャビティ付きスロットアレーアンテナ
US8193990B2 (en) Microstrip array antenna
EP2908380B1 (fr) Réseau d&#39;antennes à plaque bipolarisée à large bande et procédés utiles conjointement avec celui-ci
JP4623105B2 (ja) 放送受信用アンテナ装置
US10965020B2 (en) Antenna device
CN104377449A (zh) 宽带微带天线和天线阵列
US20190131700A1 (en) Dual antenna device
JP5029559B2 (ja) アンテナ及びそれを備えた電気機器
KR100535255B1 (ko) 초 광대역 소형 평면형 안테나 및 그 제조 방법
JP2008258852A (ja) 平面アレーアンテナ
EP3582323B1 (fr) Système d&#39;antenne double à large bande pour véhicules
US20070030197A1 (en) Antenna Structure
TWI654797B (zh) 雙端凹陷之天線及其陣列天線
JP4572922B2 (ja) アンテナシステムおよび車内用無線通信機
KR102108684B1 (ko) Mimo 안테나 모듈
KR100685749B1 (ko) 평면형 안테나
WO2011125857A1 (fr) Antenne et capteur
JP7288087B2 (ja) シフト直列給電を用いた二重偏波アンテナ
CN115706334A (zh) 车用雷达阵列天线
US7205945B2 (en) Antenna and electronic device using the same
JP4881283B2 (ja) マイクロストリップアンテナ

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 11765757

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 11765757

Country of ref document: EP

Kind code of ref document: A1