WO2005029642A1 - Multi-frequency shared antenna - Google Patents

Multi-frequency shared antenna Download PDF

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Publication number
WO2005029642A1
WO2005029642A1 PCT/JP2004/013762 JP2004013762W WO2005029642A1 WO 2005029642 A1 WO2005029642 A1 WO 2005029642A1 JP 2004013762 W JP2004013762 W JP 2004013762W WO 2005029642 A1 WO2005029642 A1 WO 2005029642A1
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WO
WIPO (PCT)
Prior art keywords
antenna
frequency
antenna element
feeding point
bent
Prior art date
Application number
PCT/JP2004/013762
Other languages
French (fr)
Japanese (ja)
Inventor
Kazuo Sekiya
Shinichiro Kitano
Original Assignee
Anten Corporation
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 Anten Corporation filed Critical Anten Corporation
Priority to JP2005514089A priority Critical patent/JPWO2005029642A1/en
Publication of WO2005029642A1 publication Critical patent/WO2005029642A1/en

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
    • H01Q9/42—Resonant antennas with feed to end of elongated active element, e.g. unipole with folded element, the folded parts being spaced apart a small fraction of the operating wavelength
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
    • H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
    • H01Q1/243—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/30—Arrangements for providing operation on different wavebands
    • H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
    • H01Q5/342—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes
    • H01Q5/357—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes using a single feed point
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
    • H01Q9/40—Element having extended radiating surface

Definitions

  • the present invention relates to a multi-frequency antenna, and more particularly, to a multi-frequency antenna built in a mobile phone or the like.
  • the present invention relates to a configuration method of a dual frequency antenna.
  • a portable device capable of accessing both an 800 MHz band mobile network and a 2. OGHz band WCDMA (Wideband Code Division Multiple Access) network is required.
  • a two-wire type antenna has been developed as shown in Fig. 12. This corresponds to each frequency by connecting two monopole elements 50 and 53 to the substrate 52 for the power supply circuits 51 and 54 and changing the length of the elements.
  • a dual-frequency antenna with an 800MHz 1Z4 wavelength monopole and a 2GHz 1Z4 wavelength monopole it is necessary to secure the space necessary to form two monopoles. That is, twice as much space is required, and since the two antennas 50 and 53 are independent, a switch circuit for switching the antennas is required, and the connection circuit is complicated.
  • the present invention provides a compact built-in antenna for use in mobile phones and the like, particularly a built-in antenna for dual frequency use in the 80 OMHz band and the 2.O GHz band, which has good return loss and radiation efficiency in view of a powerful problem.
  • the purpose is to:
  • claim 1 is an antenna shared by a plurality of frequency bands, wherein a printed wiring board having a feed point and one end are connected to the feed point.
  • the principle of the dual frequency antenna is that, for example, if a metal element such as a quarter-wave wire in the 800 MHz band is attached to a printed wiring board and fed, the metal element acts as a radiating element and operates the same as a 1Z4 wavelength monopole. .
  • the 1Z4 wavelength in the 800MHz band operates as a 3Z4 monopole in the 2GHz band which is close to the 3Z4 wavelength in the 2GHz band, it operates as a shared antenna for the 800MHz band and the 2GHz band.
  • the antenna of the present invention is configured such that the length of the antenna element is determined based on this principle, and the antenna element is bent in order to fit the antenna element in a narrow space as much as possible and to secure desired electric characteristics. .
  • the feeding point force is attached to the frequency adjustment plate during the distance of approximately 1Z3 of the total length of the antenna element, so that it can be used for two frequencies.
  • Claim 2 is an antenna shared by a plurality of frequency bands, wherein the printed wiring board provided with a feeding point, one end of which is connected to the feeding point, and which is bent so as to fit within a predetermined dimension.
  • the characteristic point of the antenna of the present invention is that in order to have a resonance point at two different frequencies, one of the feeding point force antenna elements is connected to a frequency adjusting sheet metal at a location of approximately 1Z3 of the entire length, Further, shorten the total length of the antenna element In other words, it is connected to the tip so that it can be used for two frequencies.
  • Claim 3 is characterized in that the antenna element is formed of any one of a linear material, a sheet metal, and a printed pattern formed on a dielectric substrate.
  • the antenna element may be made of a linear material such as a wire, or it may be processed into a thin sheet metal. Both may be connected by a through hole.
  • a fourth aspect of the present invention is characterized in that a part or the whole of the antenna element is embedded in the dielectric or is arranged on the surface of the dielectric.
  • the antenna element Since the antenna element is made of a thin, linear material or the like, it may be deformed or cut by an external force. Therefore, in the present invention, a part or the whole of the antenna element is buried in the dielectric or disposed on the surface so as to be hardly affected by external force.
  • a fifth aspect of the present invention is characterized in that the antenna element is formed on the surface of the dielectric by vapor deposition or adhesion.
  • a method of forming the antenna element on the surface of the dielectric there are a method of evaporating a material of the element and a method of bonding the element to the surface with an adhesive or the like.
  • the former method of vapor deposition is suitable for mass production, and the latter method of adhesion is suitable for small volume production.
  • the antenna element is bent and one frequency adjusting sheet metal is connected to a location of approximately 1Z3 of the total length of the element, it is a small and dual-frequency shared antenna. A working antenna can be realized.
  • the antenna element is bent and one frequency adjusting metal plate is connected to each of the location and the end of the element having a length of approximately 1Z3, the antenna operates as a small and two-frequency shared antenna. An antenna can be realized.
  • the antenna element is formed of any one of a linear material, a sheet metal, and a printed pattern formed on a dielectric substrate. Therefore, the variation of the manufacturing method can be widened. To increase the range of choice of manufacturing methods depending on the production volume Can do.
  • the antenna element is partially or wholly disposed inside the dielectric or on the surface of the dielectric, deformation and breakage due to external force can protect the antenna element. .
  • the antenna element is formed on the surface of the dielectric by vapor deposition or bonding, so that it is possible to provide two types of manufacturing methods suitable for mass production and for reducing the manufacturing cost. .
  • FIG. 1 (a) is an external perspective view of a mobile phone
  • FIG. 1 (b) is an enlarged perspective view of a part A in FIG. 1 (a) in which an antenna element is built in the mobile phone.
  • the mobile phone 10 houses therein the multi-frequency antenna 3 of the present invention connected to the feeding point 2 of the built-in board 1 as shown in FIG. 1 (b) (details will be described later).
  • FIG. 2 is a diagram showing the shape and configuration of the multi-frequency antenna 3 according to the first embodiment of the present invention.
  • FIG. 2 is a perspective view of the external shape of the multi-frequency antenna 3.
  • the built-in antenna element 6 is made of a linear metal, for example, a wire.
  • the elements 10 to 20 and a metal piece are used. It is configured with 4 and 5.
  • the shape of the antenna element 6 includes at least first to eleventh elements, and the first element 10 extends from the feeding point 2 in a direction substantially orthogonal to the one end surface 21 of the printed wiring board 1.
  • the second element 11 is bent upward at a substantially right angle from the end a of the first element 10, and the end b of the second element 11 also has a third element 12 folded back in parallel with the first element 10.
  • the fourth element 13 is bent and formed in a horizontal direction orthogonal to the first element 10 from the terminal end c of the third element 12.
  • a fifth element 14 is formed to bend from the end d of the element 13 so as to be parallel to the one end face 21 of the printed wiring board 1, and becomes parallel to the fourth element 13 from the end e of the fifth element 14.
  • the sixth element 15 is bent upward, and the seventh element 16 is bent back from the end f of the sixth element 15 in parallel with the fifth element 14, and the seventh element 15 is bent.
  • the terminal g force at the terminal 16 is also opposite to that of the third element 12 and the eighth element 17 is bent in a direction perpendicular to the one end surface 21 of the substrate 1.
  • the ninth element 18 is bent so as to be parallel to the element 16 of the seventh element, and the tenth element 19 is bent so that the end of the ninth element 18 is also parallel to the eighth element 17.
  • This tenth element Terminating j force DOO 19 also ninth E Remento 18 and so as to be parallel eleventh element 20 are bent and formed.
  • the metal piece 4 is provided on the third element 12, and the metal piece 5 is provided so as to straddle the ninth, tenth, and eleventh elements.
  • the number and position of the metal pieces are not limited to this figure.
  • the size of the antenna element 6 and the size of the substrate 1 are determined based on the principle of dual-frequency operation described later, the antenna element 6 is kept as small as possible in the air, and the desired electrical characteristics are obtained. In order to ensure the above, 11 elements are bent and configured. Adjustment is required after manufacturing to make the antenna match the desired frequency.
  • the antenna element 6 is bent and the metal piece 4 is connected to a location approximately 1Z3 of the total length of the element, or the metal piece 5 is connected to the tip, the antenna is small and shared by two frequencies. An antenna that operates as an antenna can be realized. Incidentally, only the metal piece 4 may be connected.
  • FIG. 3 is a diagram illustrating the operation principle of the present invention. The same components will be described with the same reference numerals.
  • the antenna element 6 connected to the feeding point 2 of the printed wiring board 1 is generally called a monopole antenna.
  • L resonates at a frequency where it is equal to the wavelength 1Z4, It is known that radio waves are radiated efficiently.
  • FIG. 3 (b) it is known that this antenna also becomes a resonance point even at a frequency where L is equal to the wavelength 3Z4, and that this antenna also becomes an antenna at this frequency.
  • the resonance frequency fl and f2 decrease when a metal piece is loaded at the tip.Feeding point force of the antenna If a piece of metal is loaded in the vicinity, only f2 can be lowered. In other words, fl and f2 can be changed by loading a metal piece on a point at approximately 1Z3 of the entire length of the antenna element 6 from the feeding point 2 of the antenna, or at the tip, or at both. Furthermore, in order to incorporate this antenna into a mobile phone or the like, it is necessary to have a shape that fits in the housing of the mobile phone. This is achieved by appropriately bending a metal piece.
  • FIG. 6 is a perspective view of the external shape of the multi-frequency antenna 3 according to the second embodiment of the present invention.
  • FIG. The same components are denoted by the same reference numerals, and duplicate description will be omitted. Since the antenna element 6 is made of a thin linear material or the like, it may be deformed or cut by an external force. Therefore, in the present embodiment, a part or the whole of the antenna element 6 is embedded in the dielectric 10 or arranged on the surface so as to be hardly affected by external force.
  • FIG. 7 is a perspective view of the external shape of a multi-frequency antenna 3 according to a third embodiment of the present invention.
  • the metal piece 4 is arranged at a position approximately 1Z3 of the antenna element 6 from the feeding point 2, and the metal piece is not connected to the tip of the antenna element 6.
  • the metal piece 4 is arranged at a position approximately 1Z3 from the feeding point 2 to the antenna element 6, and the metal piece 5 is also connected to the tip of the antenna element 6, so that the bending method of the antenna element 6 is described.
  • FIG. 7 (c) the bending method of the antenna element 6 is the same as in FIG.
  • FIG. 7 (d) shows a case where the bending method of the antenna element 6 is the same as that of FIG. 7 (a), and the shapes of the metal pieces 4 and 5 are enlarged.
  • FIG. 8 is a perspective view of the external shape of a multi-frequency antenna 3 according to a fourth embodiment of the present invention. The same components will be described with the same reference numerals.
  • FIG. 8 shows the multi-frequency antenna 3 of FIG.
  • the shape of the antenna element is the same as that in FIG.
  • FIG. 9 is a perspective view of an external shape of a multi-frequency antenna 3 according to a fifth embodiment of the present invention.
  • the same components have the same reference numbers.
  • the present embodiment is an example in which the multi-frequency antenna 3 is configured by a printed circuit board. That is, referring to FIG. 9A, a pattern 23, a pattern 27, and a pattern 22b are formed on the front surface of the double-sided substrate 21, and a pattern 25 and a pattern 22a are formed on the back surface. Connected by 26 and 22c. More specifically, pattern 23 corresponds to the first element, through hole 24 corresponds to the second element, pattern 25 corresponds to the third, fourth, and fifth elements, and through hole 26 corresponds to the sixth element.
  • the pattern 27 corresponds to the seventh and eighth elements.
  • Fig. 9 (b) is an enlargement of section B in Fig. 9 (a).
  • FIG. The coil 6 can be realized by connecting the pattern 22b on the front surface and the pattern 22a on the rear surface with through holes 22c.
  • the manufacturing method can be broadened in terms of the manufacturing method and can be manufactured.
  • the selection range of the manufacturing method can be widened depending on the production amount.
  • the antenna element 6 is disposed partially or entirely inside the dielectric member 10 or on the surface of the dielectric member 10, the antenna element can be protected from deformation or damage due to external force.
  • the antenna element 6 is formed on the surface of the dielectric 10 by vapor deposition or adhesion, it is possible to provide two types of manufacturing methods suitable for mass production and for reducing the manufacturing cost.
  • FIG. 10 is a diagram showing the shape and configuration of an antenna element 103 according to the sixth embodiment of the present invention.
  • the antenna element 103 is divided into eight parts, and each part is called an element and is electrically connected.
  • the built-in antenna element 10 3 linear metal, such as is constituted by wire, for the desired electrical properties securing and compact reduction, the element 110 forces et element 117, a coil 106, a frequency adjustment metal plate It comprises 104 and 105.
  • the shape of the antenna element 103 is constituted by at least first to eighth elements.
  • the first element 110 extends from the feeding point 102 in a direction substantially orthogonal to the one end surface 118 of the printed wiring board 1.
  • the second element 111 is formed to bend at a substantially right angle downward from the terminal end a of 110, and the third element 112 is bent back from the terminal end b of the second element 111 in parallel with the first element 110.
  • the fourth element 113 is bent in a horizontal direction orthogonal to the first element 110 from the end c of the third element 112, and the third element 112 is formed from the end d of the fourth element 113.
  • the fifth element 114 is bent so as to be parallel, and the sixth element 115 is bent upward from the terminal end e of the fifth element 114 so as to be parallel to the second element 111.
  • the seventh element 116 is bent and formed in parallel with the fifth element 114 from the end f of the sixth element 115, and the fourth element 113 is formed from the end g of the seventh element 116.
  • Anti An eighth element 117 is bent in the horizontal direction parallel to the one end surface 118 of the substrate 1 in the opposite direction, and the coil 6 extends in parallel with the seventh element 116 from the end h of the eighth element 117. It is bent.
  • the frequency adjusting sheet metal 104 is provided on the second element 111, and the frequency adjusting sheet metal 105 is provided on the end of the coil 106. Note that the number and position of the frequency adjusting sheet metal are not limited to this figure.
  • the size of the antenna element 103 and the size of the substrate 101 are determined based on the principle of dual-frequency operation to be described later, the antenna element 103 is housed in a space as small as possible, and desired electrical characteristics are obtained. In order to secure it, eight elements are bent and configured. Then, the terminal portion is collectively configured as a terminal portion. Further, in order to make the antenna match the desired frequency, adjustment is necessary after manufacturing. As one of the methods, it is possible to connect metal plates 104 and 105 having a predetermined area to predetermined positions of the antenna element 103. That is, by connecting a metal to the element, the return loss and the radiation efficiency change. Therefore, the area of the metal plate is made variable to match the optimum characteristics.
  • FIG. 11 is a perspective view of an external shape of an antenna element 103 according to a seventh embodiment of the present invention.
  • the antenna element is formed of an integrally formed sheet metal, and each point (a-h) is bent.
  • the feature of the present embodiment can be configured by forming a sheet metal with a mold and bending the sheet metal at points a, b, e, f, and h.
  • the coil 120 is formed by forming a coil.
  • FIG. 1 (a) is an external perspective view of a mobile phone, and (b) has an antenna element built into the mobile phone.
  • FIG. 2 is a diagram showing the shape and configuration of a multi-frequency antenna 3 according to a first embodiment of the present invention.
  • FIG. 3 (a) is a diagram illustrating the operation principle when the resonance point is 1Z4 wavelength, and (b) is a diagram illustrating the operation principle when the resonance point is 3Z4 wavelength.
  • FIG. 4 is a diagram illustrating the operation principle of the present invention.
  • FIG. 5 is a diagram illustrating the operation principle of the present invention.
  • FIG. 6 is a perspective view of an external shape of a multi-frequency antenna 3 according to a second embodiment of the present invention.
  • FIG. 7] (a)-(d) are perspective views of the appearance of a multi-frequency antenna 3 according to a third embodiment of the present invention.
  • FIG. 8 (a)-(d) is a perspective view of an appearance of a multi-frequency antenna 3 according to a fourth embodiment of the present invention.
  • FIG. 9 (a) is a perspective view of an external shape of a multi-frequency antenna 3 according to a fifth embodiment of the present invention
  • FIG. 9 (b) is an enlarged view of a portion B in FIG. 9 (a).
  • FIG. 10 is a view showing the shape and configuration of an antenna element 103 according to a sixth embodiment of the present invention.
  • FIG. 11 is a perspective view of an external shape of an antenna element 103 according to a seventh embodiment of the present invention.
  • FIG. 12 is a diagram illustrating the operation principle of a conventional dual-frequency antenna.

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  • Computer Networks & Wireless Communication (AREA)
  • Support Of Aerials (AREA)
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Abstract

A samll antenna good in return losss and radiation efficiency in a built-in antenna used with portable phones or the like, especially a built-in antenna for 2-frequency shared use in a 800 MHz band and 2.0 GHz band. The built-in antenna element (6), being constituted of a linear metal, for example, a wire, comprises elements (10-20) and metal pieces (frequency regulating sheet metals) (4 and 5).

Description

明 細 書  Specification
多周波数共用アンテナ  Multi-frequency antenna
技術分野  Technical field
[0001] 本発明は、多周波数共用アンテナに関し、さらに詳しくは、携帯電話等に内蔵する The present invention relates to a multi-frequency antenna, and more particularly, to a multi-frequency antenna built in a mobile phone or the like.
2周波共用アンテナの構成方法に関するものである。 The present invention relates to a configuration method of a dual frequency antenna.
背景技術  Background art
[0002] 最近では、 800MHz帯の携帯網と 2. OGHz帯の WCDMA(Wideband Code Division Multiple Access)網との両方にアクセスできる携帯機器が必要とされている。 従来のこのタイプの携帯電話の 2周波共用内蔵アンテナは図 12のように 2線タイプが 開発されている。これは給電回路 51と 54に対し 2つのモノポール素子 50と 53を基板 52に接続し、素子の長さを変えることでそれぞれの周波数に対応している。例えば、 800MHz 1 Z4波長片側モノポールと 2GHz 1 Z4波長モノポールの 2周波共用アン テナの場合では、 2つのモノポールを形成するのに必要なスペースを確保しなくては ならないことである。すなわち 2倍のスペースが必要となり、また、 2つのアンテナ 50、 53とも独立しているため、アンテナを切り替えるスィッチ回路が必要になり接続回路 が複雑になっていた。  [0002] Recently, a portable device capable of accessing both an 800 MHz band mobile network and a 2. OGHz band WCDMA (Wideband Code Division Multiple Access) network is required. As a conventional dual-frequency built-in antenna for mobile phones of this type, a two-wire type antenna has been developed as shown in Fig. 12. This corresponds to each frequency by connecting two monopole elements 50 and 53 to the substrate 52 for the power supply circuits 51 and 54 and changing the length of the elements. For example, in the case of a dual-frequency antenna with an 800MHz 1Z4 wavelength monopole and a 2GHz 1Z4 wavelength monopole, it is necessary to secure the space necessary to form two monopoles. That is, twice as much space is required, and since the two antennas 50 and 53 are independent, a switch circuit for switching the antennas is required, and the connection circuit is complicated.
発明の開示  Disclosure of the invention
発明が解決しょうとする課題  Problems to be solved by the invention
[0003] 従来技術においては、複数の異なる周波数を共用して使用する場合、その数だけ アンテナと給電回路が必要となり、小型化の要求が高い携帯電話等においては、ス ペースの点で不利になる。  [0003] In the prior art, when a plurality of different frequencies are used in common, the number of antennas and power supply circuits required is the same, which is disadvantageous in terms of space in a mobile phone or the like that requires high miniaturization. Become.
またアンテナが独立しているため、何らかの切替手段が必要となり、その点力ももコ ストとスペースの点で問題があると同時に、操作が複雑となるといつた問題がある。 本発明は、力かる課題に鑑み、携帯電話等で用いられる内蔵アンテナで、特に 80 OMHz帯及び 2. OGHz帯の 2周波共用の内蔵アンテナにおいて、小型でリタンロス 及び放射効率の良いアンテナを提供することを目的とする。  In addition, since the antenna is independent, some switching means is required, and there is a problem in terms of cost and space as well as a problem when the operation becomes complicated. SUMMARY OF THE INVENTION The present invention provides a compact built-in antenna for use in mobile phones and the like, particularly a built-in antenna for dual frequency use in the 80 OMHz band and the 2.O GHz band, which has good return loss and radiation efficiency in view of a powerful problem. The purpose is to:
課題を解決するための手段 [0004] 本発明は力かる課題を解決するために、請求項 1は、複数の周波数帯に共用のァ ンテナであって、給電点を備えたプリント配線基板と、一端が前記給電点に接続され 、所定の寸法内に収まるように屈曲もしくは湾曲させたアンテナエレメントと、該アンテ ナエレメントの所定の個所に接続されて当該アンテナで使用する周波数を調整する 1 つ以上の周波数調整用板金と、を備え、前記周波数調整用板金の 1つは，前記給電 点から前記アンテナエレメントの全長の略 1Z3までの距離の間に取り付けられている ことを特徴とする。 Means for solving the problem [0004] In order to solve the problem to be solved by the present invention, claim 1 is an antenna shared by a plurality of frequency bands, wherein a printed wiring board having a feed point and one end are connected to the feed point. An antenna element bent or curved to fit within a predetermined dimension, and one or more frequency adjusting metal plates connected to predetermined positions of the antenna element to adjust a frequency used in the antenna; And one of the frequency adjusting sheet metals is attached at a distance from the feeding point to approximately 1Z3 of the entire length of the antenna element.
2周波共用アンテナの原理は、例えば、プリント配線基板に 800MHz帯の 4分の 1 波長の針金などの金属エレメントをつけ給電すると、金属エレメントが放射素子として はたらき、 1Z4波長モノポールと同じ動作をする。このとき、 800MHz帯の 1Z4波長 は、 2GHz帯の 3Z4波長に近ぐ 2GHz帯では 3Z4モノポールとして動作するため 、 800MHz帯、 2GHz帯の 2周波の共用アンテナとして動作する。本発明のアンテナ は、この原理に基づいてアンテナエレメントの長さが決定され、アンテナエレメントを 極力狭い空間に収め、且つ所望の電気特性を確保するために、アンテナエレメント を折り曲げて構成するものである。そして、給電点力もアンテナエレメントの全長の略 1Z3までの距離の間に周波数調整用板金を取り付けて 2周波数に共用して使用で さるようにする。  The principle of the dual frequency antenna is that, for example, if a metal element such as a quarter-wave wire in the 800 MHz band is attached to a printed wiring board and fed, the metal element acts as a radiating element and operates the same as a 1Z4 wavelength monopole. . At this time, since the 1Z4 wavelength in the 800MHz band operates as a 3Z4 monopole in the 2GHz band which is close to the 3Z4 wavelength in the 2GHz band, it operates as a shared antenna for the 800MHz band and the 2GHz band. The antenna of the present invention is configured such that the length of the antenna element is determined based on this principle, and the antenna element is bent in order to fit the antenna element in a narrow space as much as possible and to secure desired electric characteristics. . Also, the feeding point force is attached to the frequency adjustment plate during the distance of approximately 1Z3 of the total length of the antenna element, so that it can be used for two frequencies.
[0005] 請求項 2は、複数の周波数帯に共用のアンテナであって、給電点を備えたプリント 配線基板と、一端が前記給電点に接続され、所定の寸法内に収まるように屈曲もしく は湾曲させたアンテナエレメントと、該アンテナエレメントの所定の個所に接続されて 当該アンテナで使用する周波数を調整する 1つ以上の周波数調整用板金と、を備え 、前記周波数調整用板金の 1つは、前記給電点カゝら前記アンテナエレメントの全長 の略 1Z3までの距離の間に取り付けられ、前記周波数調整用板金の他の 1つは前 記給電点と反対側の前記アンテナエレメントの先端に取付けられていることを特徴と する。  [0005] Claim 2 is an antenna shared by a plurality of frequency bands, wherein the printed wiring board provided with a feeding point, one end of which is connected to the feeding point, and which is bent so as to fit within a predetermined dimension. Comprises a bent antenna element, and one or more frequency adjusting metal plates connected to a predetermined portion of the antenna element to adjust a frequency used by the antenna, wherein one of the frequency adjusting metal plates is The antenna is mounted at a distance of approximately 1Z3 of the total length of the antenna element from the power feeding point, and the other one of the frequency adjusting sheet metal is mounted at the tip of the antenna element on the opposite side to the power feeding point. It is characterized by being carried out.
本発明のアンテナの特徴的な点は、 2種類の異なる周波数に共振点を持たせるた めに、給電点力 アンテナエレメントの 1つを全長の略 1Z3の場所に周波数調整用 板金を接続し、さらに他の 1つの周波数調整用板金をアンテナエレメントの全長を短 くするために先端に接続して、 2周波数で共用に使用可能とした点である。 The characteristic point of the antenna of the present invention is that in order to have a resonance point at two different frequencies, one of the feeding point force antenna elements is connected to a frequency adjusting sheet metal at a location of approximately 1Z3 of the entire length, Further, shorten the total length of the antenna element In other words, it is connected to the tip so that it can be used for two frequencies.
[0006] 請求項 3は、前記アンテナエレメントは、線状素材、板金、及び誘電体基板上に形 成されたプリントパターンの何れか〖こより構成されていることを特徴とする。 [0006] Claim 3 is characterized in that the antenna element is formed of any one of a linear material, a sheet metal, and a printed pattern formed on a dielectric substrate.
請求項 1、 2の内容を満足すれば、アンテナエレメントは針金のような線状素材で構 成しても良ぐまた細い板金を加工しても良ぐまたプリント基板を両面構成にして、ス ルーホールにより両者を接続して構成しても良い。  If the contents of claims 1 and 2 are satisfied, the antenna element may be made of a linear material such as a wire, or it may be processed into a thin sheet metal. Both may be connected by a through hole.
請求項 4は、前記アンテナエレメントの一部もしくは全体力 誘電体の内部に埋め 込まれるか、もしくは、誘電体の表面に配置されていることを特徴とする。  A fourth aspect of the present invention is characterized in that a part or the whole of the antenna element is embedded in the dielectric or is arranged on the surface of the dielectric.
アンテナエレメントは細 、線状素材等で構成されて 、るため、外力に対して変形し たり切断する虞がある。そこで本発明では、アンテナエレメントの一部もしくは全体を 誘電体の内部に埋め込んだり、表面に配置して外力の影響を受けにくくするものであ る。  Since the antenna element is made of a thin, linear material or the like, it may be deformed or cut by an external force. Therefore, in the present invention, a part or the whole of the antenna element is buried in the dielectric or disposed on the surface so as to be hardly affected by external force.
請求項 5は、前記アンテナエレメントは、前記誘電体の表面に蒸着または接着によ り形成されることを特徴とする。  A fifth aspect of the present invention is characterized in that the antenna element is formed on the surface of the dielectric by vapor deposition or adhesion.
アンテナエレメントを誘電体の表面に形成する方法として、エレメントの材料を蒸着 したり、エレメントを接着剤等により表面に接着する方法がある。前者の蒸着の方法 は、大量生産に向いており、後者の接着による方法は、少量生産に向いた方法であ る。  As a method of forming the antenna element on the surface of the dielectric, there are a method of evaporating a material of the element and a method of bonding the element to the surface with an adhesive or the like. The former method of vapor deposition is suitable for mass production, and the latter method of adhesion is suitable for small volume production.
発明の効果  The invention's effect
[0007] 請求項 1の発明によれば、アンテナエレメントを折り曲げ、且つエレメントの全長の 略 1Z3の長さの場所に周波数調整用板金を 1つ接続するので、小型で且つ 2周波 の共用アンテナとして動作するアンテナを実現することができる。  [0007] According to the first aspect of the present invention, since the antenna element is bent and one frequency adjusting sheet metal is connected to a location of approximately 1Z3 of the total length of the element, it is a small and dual-frequency shared antenna. A working antenna can be realized.
また請求項 2では、アンテナエレメントを折り曲げ、且つエレメントの全長の略 1Z3 の長さの場所と先端に周波数調整用板金を 1つずつ接続するので、小型で且つ 2周 波の共用アンテナとして動作するアンテナを実現することができる。  According to the second aspect, since the antenna element is bent and one frequency adjusting metal plate is connected to each of the location and the end of the element having a length of approximately 1Z3, the antenna operates as a small and two-frequency shared antenna. An antenna can be realized.
また請求項 3では、アンテナエレメントは、線状素材、板金、及び誘電体基板上に 形成されたプリントパターンの何れか〖こより構成されて 、るので、製造方法のバリエ一 シヨンを広くすることができ、製造する生産量により製造方法の選択幅を広くすること ができる。 According to the third aspect, the antenna element is formed of any one of a linear material, a sheet metal, and a printed pattern formed on a dielectric substrate. Therefore, the variation of the manufacturing method can be widened. To increase the range of choice of manufacturing methods depending on the production volume Can do.
また請求項 4では、アンテナエレメントの一部もしくは全体力 誘電体の内部か、もし くは，誘電体の表面に配置されているので、外力による変形や破損力もアンテナエレ メントを防護することができる。  According to the fourth aspect of the present invention, since the antenna element is partially or wholly disposed inside the dielectric or on the surface of the dielectric, deformation and breakage due to external force can protect the antenna element. .
また請求項 5では、アンテナエレメントは、前記誘電体の表面に蒸着または接着に より形成されるので、大量生産に向いた製造方法と製造コストを安価にする 2種類の 方法を提供することができる。  In claim 5, the antenna element is formed on the surface of the dielectric by vapor deposition or bonding, so that it is possible to provide two types of manufacturing methods suitable for mass production and for reducing the manufacturing cost. .
発明を実施するための最良の形態  BEST MODE FOR CARRYING OUT THE INVENTION
[0008] 以下、本発明を図に示した実施形態を用いて詳細に説明する。但し、この実施形 態に記載される構成要素、種類、組み合わせ、形状、その相対配置などは特定的な 記載がない限り、この発明の範囲をそれのみに限定する主旨ではなく単なる説明例 に過ぎない。 Hereinafter, the present invention will be described in detail with reference to embodiments shown in the drawings. However, the components, types, combinations, shapes, relative arrangements, and the like described in this embodiment are merely illustrative examples rather than limiting the scope of the present invention unless otherwise specified. Absent.
図 1 (a)は携帯電話の外観斜視図であり、図 1 (b)はアンテナエレメントを携帯電話 に内蔵した図 1 (a)の A部拡大透視図である。携帯電話 10は、その内部に図 1 (b)の ように本発明の多周波数共用アンテナ 3が内蔵基板 1の給電点 2に接続されて収納 されて 、る（詳細は後述する）。  FIG. 1 (a) is an external perspective view of a mobile phone, and FIG. 1 (b) is an enlarged perspective view of a part A in FIG. 1 (a) in which an antenna element is built in the mobile phone. As shown in FIG. 1 (b), the mobile phone 10 houses therein the multi-frequency antenna 3 of the present invention connected to the feeding point 2 of the built-in board 1 as shown in FIG. 1 (b) (details will be described later).
図 2は本発明の第 1の実施形態に係る多周波数共用アンテナ 3の形状と構成を示 す図である。図 2は多周波数共用アンテナ 3の外観形状の斜視図である。尚、この説 明ではアンテナエレメント 6を 11の部分に分け、各部分をエレメントと呼び、電気的に 接続されているものとする。この内蔵アンテナエレメント 6は、線状の金属、例えば針 金などで構成されており、所望の電気特性確保及びコンパクトィ匕のため、エレメント 1 0からエレメント 20と、金属片 (周波数調整用板金) 4及び 5を備えて構成される。  FIG. 2 is a diagram showing the shape and configuration of the multi-frequency antenna 3 according to the first embodiment of the present invention. FIG. 2 is a perspective view of the external shape of the multi-frequency antenna 3. In this description, it is assumed that the antenna element 6 is divided into 11 parts, and each part is called an element and is electrically connected. The built-in antenna element 6 is made of a linear metal, for example, a wire. In order to secure desired electrical characteristics and compactness, the elements 10 to 20 and a metal piece (a sheet metal for frequency adjustment) are used. It is configured with 4 and 5.
[0009] アンテナエレメント 6の形状は、少なくとも第 1乃至第 11のエレメントにより構成され、 第 1のエレメント 10は給電点 2からプリント配線基板 1の一端面 21とほぼ直交する方 向に延び、この第 1のエレメント 10の終端 aから上方にほぼ直角に第 2のエレメント 11 が屈曲形成され、この第 2のエレメント 11の終端 b力も第 1のエレメント 10と平行に第 3のエレメント 12が折り返して屈曲形成され、この第 3のエレメント 12の終端 cから第 1 のエレメント 10と直交する水平方向に第 4のエレメント 13が屈曲形成され、この第 4の エレメント 13の終端 dからプリント配線基板 1の一端面 21と平行となるように第 5のェ レメント 14が屈曲形成され、この第 5のエレメント 14の終端 eから第 4のエレメント 13と 平行となるように第 6のエレメント 15が上方に屈曲形成され、この第 6のエレメント 15 の終端 fから第 5のエレメント 14と平行に第 7のエレメント 16が折り返して屈曲形成さ れ、この第 7のエレメント 16の終端 g力も第 3のエレメント 12と反対方向であり且つ基 板 1の一端面 21と直交する方向に第 8のエレメント 17が屈曲形成され、この第 8のェ レメント 17の終端 h力 第 7のエレメント 16と平行となるように第 9のエレメント 18が屈 曲形成され、この第 9のエレメント 18の終端 も第 8のエレメント 17と平行となるように 第 10のエレメント 19が屈曲形成され、この第 10のエレメント 19の終端 j力も第 9のェ レメント 18と平行となるように第 11のエレメント 20が屈曲形成される。そして、この例 では金属片 4が第 3のエレメント 12に備えられ、金属片 5が第 9、 10、 11のエレメント にまたぐように備えられている。尚、金属片の数と位置はこの図に限るものではない。 このように本実施形態のアンテナは、後述する 2周波共用動作の原理に基づいて アンテナエレメント 6と基板 1のサイズが決定され、アンテナエレメント 6を極力狭 、空 間に収め、且つ所望の電気特性を確保するために、 11のエレメントを折り曲げて構 成するものである。また、所望の周波数に合致したアンテナにするには、製造後に調 整が必要である。その一つの方法としてアンテナエレメント 6の所定の位置に、所定 の面積を有する金属片 4、 5を接続することにより可能である。即ち、エレメントに金属 片を接続することにより、リタンロスと放射効率が変化するので、金属板の面積を可変 にして最適な特性に合わせこんで 、く。 [0009] The shape of the antenna element 6 includes at least first to eleventh elements, and the first element 10 extends from the feeding point 2 in a direction substantially orthogonal to the one end surface 21 of the printed wiring board 1. The second element 11 is bent upward at a substantially right angle from the end a of the first element 10, and the end b of the second element 11 also has a third element 12 folded back in parallel with the first element 10. The fourth element 13 is bent and formed in a horizontal direction orthogonal to the first element 10 from the terminal end c of the third element 12. A fifth element 14 is formed to bend from the end d of the element 13 so as to be parallel to the one end face 21 of the printed wiring board 1, and becomes parallel to the fourth element 13 from the end e of the fifth element 14. As described above, the sixth element 15 is bent upward, and the seventh element 16 is bent back from the end f of the sixth element 15 in parallel with the fifth element 14, and the seventh element 15 is bent. The terminal g force at the terminal 16 is also opposite to that of the third element 12 and the eighth element 17 is bent in a direction perpendicular to the one end surface 21 of the substrate 1. The ninth element 18 is bent so as to be parallel to the element 16 of the seventh element, and the tenth element 19 is bent so that the end of the ninth element 18 is also parallel to the eighth element 17. , This tenth element Terminating j force DOO 19 also ninth E Remento 18 and so as to be parallel eleventh element 20 are bent and formed. In this example, the metal piece 4 is provided on the third element 12, and the metal piece 5 is provided so as to straddle the ninth, tenth, and eleventh elements. Note that the number and position of the metal pieces are not limited to this figure. As described above, in the antenna according to the present embodiment, the size of the antenna element 6 and the size of the substrate 1 are determined based on the principle of dual-frequency operation described later, the antenna element 6 is kept as small as possible in the air, and the desired electrical characteristics are obtained. In order to ensure the above, 11 elements are bent and configured. Adjustment is required after manufacturing to make the antenna match the desired frequency. As one of the methods, it is possible to connect metal pieces 4 and 5 having a predetermined area to predetermined positions of the antenna element 6. That is, by connecting a metal piece to the element, the return loss and the radiation efficiency change. Therefore, the area of the metal plate is made variable to match the optimum characteristics.
具体的には、アンテナエレメント 6を折り曲げ、且つエレメントの全長の略 1Z3の長 さの場所に金属片 4を接続したり、先端に金属片 5を接続するので、小型で且つ 2周 波の共用アンテナとして動作するアンテナを実現することができる。尚、金属片 4のみ を接続するようにしてもよ 、。  More specifically, since the antenna element 6 is bent and the metal piece 4 is connected to a location approximately 1Z3 of the total length of the element, or the metal piece 5 is connected to the tip, the antenna is small and shared by two frequencies. An antenna that operates as an antenna can be realized. Incidentally, only the metal piece 4 may be connected.
図 3は本発明の動作原理を説明する図である。同じ構成要素には同じ参照番号を 付して説明する。プリント配線基板 1の給電点 2に接続されたアンテナエレメント 6は、 一般にモノポールアンテナと呼ばれ、図 3 (a)に示す電圧分布 7となったとき、即ち、 アンテナの長さを Lとすると、 Lが波長の 1Z4に等しくなる周波数において共振し、効 率よく電波を放射することが知られている。さらに、図 3 (b)に示すように、このアンテ ナは、 Lが波長の 3Z4に等しくなる周波数においても、共振点となり、この周波数で もアンテナとなることが知られて 、る。 FIG. 3 is a diagram illustrating the operation principle of the present invention. The same components will be described with the same reference numerals. The antenna element 6 connected to the feeding point 2 of the printed wiring board 1 is generally called a monopole antenna.When the voltage distribution 7 shown in FIG. 3A is obtained, that is, when the length of the antenna is L, , L resonates at a frequency where it is equal to the wavelength 1Z4, It is known that radio waves are radiated efficiently. Further, as shown in FIG. 3 (b), it is known that this antenna also becomes a resonance point even at a frequency where L is equal to the wavelength 3Z4, and that this antenna also becomes an antenna at this frequency.
さて、図 4に示すように、モノポールアンテナにおいて、アンテナエレメント 6の先端 に金属片 5を取り付けると、アンテナの長さを短くできることが知られている。即ち、先 端に金属片 5を取り付けるとアンテナの共振周波数を低くすることができる。これは、 アンテナの先端は電圧が最大 (電流が最小)で電荷が一番多く貯まり、この部分に金 属片 5を取り付け容量 Caを増加すると、アンテナの長さを長くしたのと等価になるから である。  Now, as shown in FIG. 4, it is known that in a monopole antenna, when the metal piece 5 is attached to the tip of the antenna element 6, the length of the antenna can be shortened. That is, when the metal piece 5 is attached to the end, the resonance frequency of the antenna can be lowered. This is equivalent to increasing the antenna length when the tip of the antenna has the largest voltage (smallest current) and the largest amount of electric charge, and when the metal piece 5 is attached to this part and the capacitance Ca is increased, From.
一方、 1Z4波長で共振しているモノポールアンテナにおいて、アンテナの接地基 板に近いところに金属片を装荷しても共振周波数はほとんど変化がない。これは、接 地基板に近いところでは、電流は大きいが電圧が低ぐ電荷の蓄積がないためである ところ力 図 5に示すように、 3Z4波長で共振しているモノポールアンテナにおいて は、電流が最小 (電荷が最大)となるところは、アンテナエレメント 6の全長の略 1Z3の ところにあるので、この点の近くに金属片 4を装荷してもアンテナの共振周波数を低く することができる。  On the other hand, in a monopole antenna that resonates at 1Z4 wavelength, the resonance frequency hardly changes even if a metal piece is loaded near the antenna ground substrate. This is because near the grounded substrate, the current is large but the voltage is low and there is no charge accumulation.For a monopole antenna resonating at the 3Z4 wavelength, as shown in Fig. 5, the current is large. Is minimum (maximum charge) at approximately 1Z3 of the entire length of the antenna element 6, and therefore, even if the metal piece 4 is loaded near this point, the resonance frequency of the antenna can be lowered.
以上をまとめると、 flおよびそのおおよそ 3倍の共振周波数 f2で共振するモノポー ルアンテナにおいて、先端に金属片を装荷すると共振周波数 flおよび f2ともに低く なる力 アンテナの給電点力 アンテナ全長の略 1Z3の長さのところ付近に金属片 を装荷すると、 f2のみが低くすることができる。即ち、アンテナの給電点 2からアンテ ナエレメント 6の全長の略 1Z3の点ある 、は先端、ある 、はその両方に金属片を装 荷することにより、 flおよび f2を変化させることができる。さらに，本アンテナを、携帯 電話等に内蔵するためには、携帯電話の筐体内に収まる形状とする必要があるが、 これには、金属片を適宜折り曲げることによって実現する。さらに、金属片装荷により プリント配線基盤 1との間の容量を形成する必要があり、このためには金属片の一端 をアンテナエレメント 6に接続し、プリント配線基盤の一端の端辺と平行に接地する。 図 6は本発明の第 2の実施形態に係る多周波数共用アンテナ 3の外観形状の斜視 図である。同じ構成要素には同じ参照番号が付されているので、重複する説明は省 略する。アンテナエレメント 6は細い線状素材等で構成されているため、外力により変 形したり切断する虞がある。そこで本実施形態では、アンテナエレメント 6の一部もしく は全体を誘電体 10の内部に埋め込んだり、表面に配置して外力の影響を受けにくく するものである。 To summarize the above, in a monopole antenna that resonates at fl and a resonance frequency f2 that is approximately three times that of fl, the resonance frequency fl and f2 decrease when a metal piece is loaded at the tip.Feeding point force of the antenna If a piece of metal is loaded in the vicinity, only f2 can be lowered. In other words, fl and f2 can be changed by loading a metal piece on a point at approximately 1Z3 of the entire length of the antenna element 6 from the feeding point 2 of the antenna, or at the tip, or at both. Furthermore, in order to incorporate this antenna into a mobile phone or the like, it is necessary to have a shape that fits in the housing of the mobile phone. This is achieved by appropriately bending a metal piece. Furthermore, it is necessary to form a capacitance between the printed wiring board 1 and the metal piece by loading the metal piece. To this end, one end of the metal piece is connected to the antenna element 6 and grounded in parallel with one end of the printed wiring board. I do. FIG. 6 is a perspective view of the external shape of the multi-frequency antenna 3 according to the second embodiment of the present invention. FIG. The same components are denoted by the same reference numerals, and duplicate description will be omitted. Since the antenna element 6 is made of a thin linear material or the like, it may be deformed or cut by an external force. Therefore, in the present embodiment, a part or the whole of the antenna element 6 is embedded in the dielectric 10 or arranged on the surface so as to be hardly affected by external force.
[0012] 図 7は本発明の第 3の実施形態に係る多周波数共用アンテナ 3の外観形状の斜視 図である。同じ構成要素には同じ参照番号を付して説明する。図 7 (a)は、金属片 4 が給電点 2からアンテナエレメント 6の略 1Z3の場所に配置されており、アンテナエレ メント 6の先端には金属片が接続されていない。図 7 (b)は金属片 4が給電点 2からァ ンテナエレメント 6の略 1Z3の場所に配置されており、アンテナエレメント 6の先端に も金属片 5が接続され、アンテナエレメント 6の屈曲方法を変えている。図 7 (c)は、ァ ンテナエレメント 6の屈曲方法を図 7 (a)と同様にし、金属片 4が給電点 2からアンテナ エレメント 6の略 1Z3の場所に配置されており、アンテナエレメント 6の先端には金属 片 5が接続されている。図 7 (d)は、アンテナエレメント 6の屈曲方法を図 7 (a)と同様 にし、金属片 4と 5の形状を大きくしたものである。  FIG. 7 is a perspective view of the external shape of a multi-frequency antenna 3 according to a third embodiment of the present invention. The same components will be described with the same reference numerals. In FIG. 7 (a), the metal piece 4 is arranged at a position approximately 1Z3 of the antenna element 6 from the feeding point 2, and the metal piece is not connected to the tip of the antenna element 6. In FIG. 7 (b), the metal piece 4 is arranged at a position approximately 1Z3 from the feeding point 2 to the antenna element 6, and the metal piece 5 is also connected to the tip of the antenna element 6, so that the bending method of the antenna element 6 is described. Changing. In FIG. 7 (c), the bending method of the antenna element 6 is the same as in FIG. 7 (a), and the metal piece 4 is arranged at a position approximately 1Z3 of the antenna element 6 from the feed point 2; A metal piece 5 is connected to the tip. FIG. 7 (d) shows a case where the bending method of the antenna element 6 is the same as that of FIG. 7 (a), and the shapes of the metal pieces 4 and 5 are enlarged.
図 8は本発明の第 4の実施形態に係る多周波数共用アンテナ 3の外観形状の斜視 図である。同じ構成要素には同じ参照番号を付して説明する。図 8は図 7の多周波数 共用アンテナ 3の一部もしくは全体を誘電体 10に埋め込んだものである。アンテナェ レメントの形状は図 7と同様であるので説明を省略する。  FIG. 8 is a perspective view of the external shape of a multi-frequency antenna 3 according to a fourth embodiment of the present invention. The same components will be described with the same reference numerals. FIG. 8 shows the multi-frequency antenna 3 of FIG. The shape of the antenna element is the same as that in FIG.
[0013] 図 9は本発明の第 5の実施形態に係る多周波数共用アンテナ 3の外観形状の斜視 図である。同じ構成要素には同じ参照番号が付されている。本実施形態では、多周 波数共用アンテナ 3をプリント基板により構成した例である。即ち、図 9 (a)を参照する と、両面基板 21の表面にパターン 23、パターン 27、パターン 22bを形成し、裏面に パターン 25、パターン 22aを形成し、各面のパターンをスルーホール 24、 26、 22cに より接続している。さら詳しく説明すると、パターン 23は第 1のエレメントに対応し、ス ルーホール 24は第 2のエレメントに対応し、パターン 25は第 3、 4、 5のエレメントに対 応し、スルーホール 26は第 6のエレメントに対応し、パターン 27は第 7、 8エレメントに 対応している。そして B部にコイル 6が形成されている。図 9 (b)は図 9 (a)の B部拡大 図である。コイル 6は表面のパターン 22bと裏面のパターン 22aをスルーホール 22c により接続することにより実現できる。 FIG. 9 is a perspective view of an external shape of a multi-frequency antenna 3 according to a fifth embodiment of the present invention. The same components have the same reference numbers. The present embodiment is an example in which the multi-frequency antenna 3 is configured by a printed circuit board. That is, referring to FIG. 9A, a pattern 23, a pattern 27, and a pattern 22b are formed on the front surface of the double-sided substrate 21, and a pattern 25 and a pattern 22a are formed on the back surface. Connected by 26 and 22c. More specifically, pattern 23 corresponds to the first element, through hole 24 corresponds to the second element, pattern 25 corresponds to the third, fourth, and fifth elements, and through hole 26 corresponds to the sixth element. The pattern 27 corresponds to the seventh and eighth elements. And the coil 6 is formed in the B section. Fig. 9 (b) is an enlargement of section B in Fig. 9 (a). FIG. The coil 6 can be realized by connecting the pattern 22b on the front surface and the pattern 22a on the rear surface with through holes 22c.
またアンテナエレメント 6は、線状素材、板金、及び誘電体基板上に形成されたプリ ントパターンの何れかにより構成されて 、るので、製造方法のノ リエーシヨンを広くす ることができ、製造する生産量により製造方法の選択幅を広くすることができる。 また、アンテナエレメント 6の一部もしくは全体力 誘電体 10の内部か、もしくは、誘 電体 10の表面に配置されて 、るので、外力による変形や破損力 アンテナエレメント を防護することができる。  Further, since the antenna element 6 is formed of any one of a linear material, a sheet metal, and a print pattern formed on a dielectric substrate, the manufacturing method can be broadened in terms of the manufacturing method and can be manufactured. The selection range of the manufacturing method can be widened depending on the production amount. In addition, since the antenna element 6 is disposed partially or entirely inside the dielectric member 10 or on the surface of the dielectric member 10, the antenna element can be protected from deformation or damage due to external force.
また、アンテナエレメント 6は、誘電体 10の表面に蒸着または接着により形成される ので、大量生産に向いた製造方法と製造コストを安価にする 2種類の方法を提供す ることがでさる。  Further, since the antenna element 6 is formed on the surface of the dielectric 10 by vapor deposition or adhesion, it is possible to provide two types of manufacturing methods suitable for mass production and for reducing the manufacturing cost.
図 10は本発明の第 6の実施形態に係るアンテナエレメント 103の形状と構成を示 す図である。尚、この説明ではアンテナエレメント 103を 8つの部分に分け、各部分を エレメントと呼び、電気的に接続されているものとする。この内蔵アンテナエレメント 10 3は、線状の金属、例えば針金などで構成されており、所望の電気特性確保及びコ ンパクト化のため、エレメント 110力らエレメント 117と、コイル 106と、周波数調整用 板金 104及び 105を備えて構成される。 FIG. 10 is a diagram showing the shape and configuration of an antenna element 103 according to the sixth embodiment of the present invention. In this description, it is assumed that the antenna element 103 is divided into eight parts, and each part is called an element and is electrically connected. The built-in antenna element 10 3, linear metal, such as is constituted by wire, for the desired electrical properties securing and compact reduction, the element 110 forces et element 117, a coil 106, a frequency adjustment metal plate It comprises 104 and 105.
アンテナエレメント 103の形状は、少なくとも第 1乃至第 8のエレメントにより構成され 、第 1のエレメント 110は給電点 102からプリント配線基板 1の一端面 118とほぼ直交 する方向に延び、この第 1のエレメント 110の終端 aから下方にほぼ直角に第 2のエレ メント 111力 S屈曲形成され、この第 2のエレメント 111の終端 bから第 1のエレメント 110 と平行に第 3のエレメント 112が折り返して屈曲形成され、この第 3のエレメント 112の 終端 cから第 1のエレメント 110と直交する水平方向に第 4のエレメント 113が屈曲形 成され、この第 4のエレメント 113の終端 dから第 3のエレメント 112と平行となるように 第 5のエレメント 114が屈曲形成され、この第 5のエレメント 114の終端 eから第 2のェ レメント 111と平行となるように第 6のエレメント 115が上方に屈曲形成され、この第 6 のエレメント 115の終端 fから第 5のエレメント 114と平行に第 7のエレメント 116が折り 返して屈曲形成され、この第 7のエレメント 116の終端 gから第 4のエレメント 113と反 対方向であり且つ基板 1の一端面 118と平行な水平方向に第 8のエレメント 117が屈 曲形成され、この第 8のエレメント 117の終端 hからコイル 6が第 7のエレメント 116と平 行に屈曲形成されている。 The shape of the antenna element 103 is constituted by at least first to eighth elements.The first element 110 extends from the feeding point 102 in a direction substantially orthogonal to the one end surface 118 of the printed wiring board 1. The second element 111 is formed to bend at a substantially right angle downward from the terminal end a of 110, and the third element 112 is bent back from the terminal end b of the second element 111 in parallel with the first element 110. The fourth element 113 is bent in a horizontal direction orthogonal to the first element 110 from the end c of the third element 112, and the third element 112 is formed from the end d of the fourth element 113. The fifth element 114 is bent so as to be parallel, and the sixth element 115 is bent upward from the terminal end e of the fifth element 114 so as to be parallel to the second element 111. The seventh element 116 is bent and formed in parallel with the fifth element 114 from the end f of the sixth element 115, and the fourth element 113 is formed from the end g of the seventh element 116. Anti An eighth element 117 is bent in the horizontal direction parallel to the one end surface 118 of the substrate 1 in the opposite direction, and the coil 6 extends in parallel with the seventh element 116 from the end h of the eighth element 117. It is bent.
そして、この例では周波数調整板金 104が第 2のエレメント 111に備えられ、周波数 調整板金 105がコイル 106の終端に備えられている。尚、周波数調整板金の数と位 置はこの図に限るものではない。  In this example, the frequency adjusting sheet metal 104 is provided on the second element 111, and the frequency adjusting sheet metal 105 is provided on the end of the coil 106. Note that the number and position of the frequency adjusting sheet metal are not limited to this figure.
このように本実施形態のアンテナは、後述する 2周波共用動作の原理に基づいて アンテナエレメント 103と基板 101のサイズが決定され、アンテナエレメント 103を極 力狭い空間に収め、且つ所望の電気特性を確保するために、 8つのエレメントを折り 曲げて構成するものである。そして、終端の部分は終端部としてまとめて構成される。 また、所望の周波数に合致したアンテナにするには、製造後に調整が必要である。 その一つの方法としてアンテナエレメント 103の所定の位置に、所定の面積を有する 金属板 104、 105を接続することにより可能である。即ち、エレメントに金属を接続す ることにより、リタンロスと放射効率が変化するので、金属板の面積を可変にして最適 な特性に合わせこんで 、く。  As described above, in the antenna according to the present embodiment, the size of the antenna element 103 and the size of the substrate 101 are determined based on the principle of dual-frequency operation to be described later, the antenna element 103 is housed in a space as small as possible, and desired electrical characteristics are obtained. In order to secure it, eight elements are bent and configured. Then, the terminal portion is collectively configured as a terminal portion. Further, in order to make the antenna match the desired frequency, adjustment is necessary after manufacturing. As one of the methods, it is possible to connect metal plates 104 and 105 having a predetermined area to predetermined positions of the antenna element 103. That is, by connecting a metal to the element, the return loss and the radiation efficiency change. Therefore, the area of the metal plate is made variable to match the optimum characteristics.
[0015] 図 11は本発明の第 7の実施形態に係るアンテナエレメント 103の外観形状の斜視 図である。同じ構成要素には同じ参照番号が付されているので、重複する説明は省 略する。本実施形態では、アンテナエレメントを一体形成の板金で構成し、各点（a— h)を折り曲げて構成している。本実施形態の特徴は、金型により板金を形成して a、 b 、 e、 f、 h点で折り曲げることにより構成できる。尚、 h点ではコイル状にすることにより コイル 120が形成される。 FIG. 11 is a perspective view of an external shape of an antenna element 103 according to a seventh embodiment of the present invention. The same components are denoted by the same reference numerals, and duplicate description will be omitted. In the present embodiment, the antenna element is formed of an integrally formed sheet metal, and each point (a-h) is bent. The feature of the present embodiment can be configured by forming a sheet metal with a mold and bending the sheet metal at points a, b, e, f, and h. At the point h, the coil 120 is formed by forming a coil.
図面の簡単な説明  Brief Description of Drawings
[0016] [図 1] (a)は携帯電話の外観斜視図、（b)はアンテナエレメントを携帯電話に内蔵した  [0016] [Fig. 1] (a) is an external perspective view of a mobile phone, and (b) has an antenna element built into the mobile phone.
(a)の A部拡大透視図である。  It is the A section enlarged perspective view of (a).
[図 2]本発明の第 1の実施形態に係る多周波数共用アンテナ 3の形状と構成を示す 図である。  FIG. 2 is a diagram showing the shape and configuration of a multi-frequency antenna 3 according to a first embodiment of the present invention.
[図 3] (a)は共振点が 1Z4波長の動作原理を説明する図、 (b)は共振点が 3Z4波長 の動作原理を説明する図である。 [図 4]本発明の動作原理を説明する図である。 [FIG. 3] (a) is a diagram illustrating the operation principle when the resonance point is 1Z4 wavelength, and (b) is a diagram illustrating the operation principle when the resonance point is 3Z4 wavelength. FIG. 4 is a diagram illustrating the operation principle of the present invention.
[図 5]本発明の動作原理を説明する図である。 FIG. 5 is a diagram illustrating the operation principle of the present invention.
[図 6]本発明の第 2の実施形態に係る多周波数共用アンテナ 3の外観形状の斜視図 である。  FIG. 6 is a perspective view of an external shape of a multi-frequency antenna 3 according to a second embodiment of the present invention.
[図 7] (a)一 (d)は本発明の第 3の実施形態に係る多周波数共用アンテナ 3の外観形 状の斜視図である。  [FIG. 7] (a)-(d) are perspective views of the appearance of a multi-frequency antenna 3 according to a third embodiment of the present invention.
[図 8] (a)一 (d)は本発明の第 4の実施形態に係る多周波数共用アンテナ 3の外観形 状の斜視図である。  FIG. 8 (a)-(d) is a perspective view of an appearance of a multi-frequency antenna 3 according to a fourth embodiment of the present invention.
[図 9] (a)は本発明の第 5の実施形態に係る多周波数共用アンテナ 3の外観形状の 斜視図、（b)は（a)の B部拡大図である。  FIG. 9 (a) is a perspective view of an external shape of a multi-frequency antenna 3 according to a fifth embodiment of the present invention, and FIG. 9 (b) is an enlarged view of a portion B in FIG. 9 (a).
[図 10]本発明の第 6の実施形態に係るアンテナエレメント 103の形状と構成を示す図 である。  FIG. 10 is a view showing the shape and configuration of an antenna element 103 according to a sixth embodiment of the present invention.
[図 11]本発明の第 7の実施形態に係るアンテナエレメント 103の外観形状の斜視図 である。  FIG. 11 is a perspective view of an external shape of an antenna element 103 according to a seventh embodiment of the present invention.
[図 12]従来の 2周波共用アンテナの動作原理を説明する図である。  FIG. 12 is a diagram illustrating the operation principle of a conventional dual-frequency antenna.
符号の説明 Explanation of symbols
1 プリント配線基板、 2 給電点、 3 多周波数共用アンテナ、 4、 5 周波数調整用 板金、 6 アンテナエレメント  1 Printed circuit board, 2 Feed point, 3 Multi-frequency shared antenna, 4, 5 Frequency adjustment sheet metal, 6 Antenna element

Claims

請求の範囲 The scope of the claims
[1] 複数の周波数帯に共用のアンテナであって、給電点を備えたプリント配線基板と、 一端が前記給電点に接続され、所定の寸法内に収まるように屈曲もしくは湾曲させ たアンテナエレメントと、該アンテナエレメントの所定の個所に接続されて当該アンテ ナで使用する周波数を調整する 1つ以上の周波数調整用板金と、を備え、  [1] An antenna shared by a plurality of frequency bands, a printed wiring board provided with a feeding point, and an antenna element having one end connected to the feeding point and bent or curved to fit within a predetermined dimension. And one or more frequency adjusting metal plates connected to a predetermined portion of the antenna element to adjust the frequency used by the antenna.
前記周波数調整用板金の 1つは、前記給電点力 前記アンテナエレメントの全長 の略 1Z3までの距離の間に取り付けられていることを特徴とする多周波数共用アン テナ。  The multi-frequency antenna according to claim 1, wherein one of the frequency adjusting sheet metals is attached to the feed point force at a distance of up to approximately 1Z3 of the total length of the antenna element.
[2] 複数の周波数帯に共用のアンテナであって、給電点を備えたプリント配線基板と、 一端が前記給電点に接続され、所定の寸法内に収まるように屈曲もしくは湾曲させ たアンテナエレメントと、該アンテナエレメントの所定の個所に接続されて当該アンテ ナで使用する周波数を調整する 1つ以上の周波数調整用板金と、を備え、  [2] An antenna shared by a plurality of frequency bands, the printed wiring board having a feeding point, and an antenna element having one end connected to the feeding point and bent or curved to fit within a predetermined dimension. And one or more frequency adjusting metal plates connected to a predetermined portion of the antenna element to adjust the frequency used by the antenna.
前記周波数調整用板金の 1つは、前記給電点力 前記アンテナエレメントの全長 の略 1Z3までの距離の間に取り付けられ、前記周波数調整用板金の他の 1つは前 記給電点と反対側の前記アンテナエレメントの先端に取付けられていることを特徴と する多周波数共用アンテナ。  One of the frequency adjusting sheet metal is attached to the feeding point force at a distance of about 1Z3 of the total length of the antenna element, and the other one of the frequency adjusting sheet metal is on the side opposite to the feeding point. A multi-frequency antenna, which is attached to a tip of the antenna element.
[3] 前記アンテナエレメントは、線状素材、板金、及び誘電体基板上に形成されたプリ ントパターンの何れかにより構成されていることを特徴とする請求項 1または 2に記載 の多周波数共用アンテナ。  3. The multi-frequency sharing device according to claim 1, wherein the antenna element is formed of any of a linear material, a sheet metal, and a print pattern formed on a dielectric substrate. antenna.
[4] 前記アンテナエレメントの一部もしくは全体力 誘電体の内部に埋め込まれるか、も しくは、誘電体の表面に配置されていることを特徴とする請求項 1または 2に記載の 多周波数共用アンテナ。  [4] The multi-frequency sharing device according to claim 1 or 2, wherein a part or the whole of the antenna element is embedded in a dielectric or disposed on a surface of the dielectric. antenna.
[5] 前記アンテナエレメントは、前記誘電体の表面に蒸着または接着により形成される ことを特徴とする請求項 4に記載の多周波数共用アンテナ。  [5] The multi-frequency antenna according to claim 4, wherein the antenna element is formed on the surface of the dielectric by vapor deposition or adhesion.
PCT/JP2004/013762 2003-09-22 2004-09-21 Multi-frequency shared antenna WO2005029642A1 (en)

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