JPH114113A - Surface mount antenna and communication apparatus using the same - Google Patents

Surface mount antenna and communication apparatus using the same

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Publication number
JPH114113A
JPH114113A JP10081335A JP8133598A JPH114113A JP H114113 A JPH114113 A JP H114113A JP 10081335 A JP10081335 A JP 10081335A JP 8133598 A JP8133598 A JP 8133598A JP H114113 A JPH114113 A JP H114113A
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end
electrodes
plurality
surface
electrode
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JP10081335A
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Japanese (ja)
Inventor
Kazuya Kawabata
Shoji Nagumo
正二 南雲
一也 川端
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Murata Mfg Co Ltd
株式会社村田製作所
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Priority to JP9-101656 priority
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Priority to JP10081335A priority patent/JPH114113A/en
Publication of JPH114113A publication Critical patent/JPH114113A/en
Application status is Pending legal-status Critical

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Abstract

PROBLEM TO BE SOLVED: To make a bond wide and to use plural frequencies without enlarging the dimensions by forming each end of plural power feeding electrodes to the opening ends of radiation electrodes through gaps, gathering the other ends of the plural power feeding electrodes into one and connecting it to a connection electrode. SOLUTION: A ground electrode 3 is formed on one main face of a base 2 in a rectangular parallelopiped form and the two strips of radiation electrodes 4 and 5 approximately the λ/4 length on the other main face. The radiation electrodes 4 and 5 are bent in a miandaing form and each end forms the opening end and the other end is connected to the ground electrode 3 through one end face of the base 2. Each end of the feeding electrodes 6 and 7 is formed with each end of the radiation electrodes 4 and 5 through the gaps g1 and g2 and the other end is connected to the connection electrode 8 at the other end face facing one end face of the base 2. They are connected to the connection electrode 8. The radiation electrode 4 is formed slightly longer than the radiation electrode 5.

Description

【発明の詳細な説明】 DETAILED DESCRIPTION OF THE INVENTION

【0001】 [0001]

【発明の属する技術分野】本発明は、表面実装型アンテナおよびそれを用いた通信機、特に広い周波数帯域や複数の周波数に対応した携帯電話などの移動体通信機器に用いられる表面実装型アンテナおよびそれを用いた通信機に関する。 The present invention relates to a surface mount antenna and communication apparatus using the same, the mobile phone surface-mounted antenna and used for mobile communication equipment such as corresponding to particular wide frequency band or multiple frequencies It relates to a communication device using the same.

【0002】 [0002]

【従来の技術】一般にアンテナの広帯域化を図る場合、 BACKGROUND OF THE INVENTION In general, when widen the band of the antenna,
アンテナの放射抵抗を下げたり、放射電極の幅を広げたりしていた。 Lowering the radiation resistance of the antenna, it has been or widen the radiation electrode. また、複数の周波数の信号を扱いたいときには複数のアンテナをそれぞれ使用していた。 Also, when you want to treat the signals of a plurality of frequencies have used multiple antennas, respectively.

【0003】 [0003]

【発明が解決しようとする課題】しかしながら、広帯域化をしてアンテナ利得を維持するために放射電極の幅を広くするとアンテナのサイズが大きくなり、小形化に限界があった。 However [0007], when the width of the radiation electrode to maintain the antenna gain and the bandwidth of the size of the antenna increases, there is a limit to miniaturization. また、複数のアンテナを使用するためには、実装基板上のアンテナを搭載するのに必要な面積が大きくなり、これを搭載する通信機の小形化を妨げていた。 Further, in order to use a plurality of antennas, the area required for mounting the antenna on the mounting board is increased, it has prevented the miniaturization of the communication device for mounting this.

【0004】そこで、本発明は、形状を大きくすることなく、広帯域化、周波数の複数化を図ることのできる表面実装型アンテナおよびそれを用いた通信機を提供することを目的とする。 [0004] Therefore, the present invention is, without increasing the shape, broadband, and an object thereof is to provide a surface mount antenna and communication apparatus using the same can be made more of the frequency.

【0005】 [0005]

【課題を解決するための手段】上記問題点を解決するために、本発明の表面実装型アンテナは、絶縁体よりなる直方体状の基体の、一方主面にグランド電極が形成され、前記基体の少なくとも他方主面にストリップ状の複数の放射電極が形成された表面実装型アンテナであって、前記複数の放射電極の一端はそれぞれ前記基体の他方主面あるいはいずれかの端面で開放端を形成し、他端はそれぞれ前記グランド電極と接続し、前記複数の放射電極の一端に、それぞれギャップを介して複数の給電電極の一端を形成し、前記複数の給電電極の他端は前記基体のいずれかの面に形成された結合電極に接続されていることを特徴とする。 In order to solve the above problems SUMMARY OF THE INVENTION The surface-mounted antenna of the present invention, the rectangular-shaped base made of an insulating material, a ground electrode is formed on the other hand on the main surface, of the substrate at least the other main surface to a surface-mounted antenna strip of the plurality of radiation electrodes are formed, to form a second main surface or open end in one of the end faces of each end is the base of the plurality of radiation electrodes and the other end connected to each of the ground electrode, one end of the plurality of radiation electrodes, respectively, via the gap forms one end of a plurality of power supply electrodes, the other end of said plurality of power supply electrodes either the substrate characterized in that it is connected to a coupling electrode formed on the surface of.

【0006】また、本発明の表面実装型アンテナは、絶縁体よりなる直方体状の基体の、一方主面と他方主面と4つの端面の少なくとも1つの面に、複数のグランド電極と、ストリップ状の複数の放射電極が形成された表面実装型アンテナであって、前記複数の放射電極の一端はそれぞれ開放端を形成し、他端は前記複数のグランド電極とそれぞれ接続し、前記複数の放射電極の一端にそれぞれギャップを介して複数の給電電極の一端を形成し、 [0006] The surface-mounted antenna of the present invention, the rectangular-shaped base made of an insulating material, whereas at least one plane of the major surface and the other main surface and four end faces, and a plurality of ground electrodes, strips a plurality of radiation electrodes surface mount antenna, which is formed, one end of the plurality of radiation electrodes forming the respective open ends, the other end is connected respectively with said plurality of ground electrodes, the plurality of radiation electrodes with a gap to one end of the forms one end of a plurality of power supply electrodes,
前記複数の給電電極の他端は前記基体のいずれかの面に形成された結合電極に接続されていることを特徴とする。 The other end of the plurality of power supply electrodes characterized in that it is connected to a coupling electrode formed on either side of the substrate.

【0007】また、本発明の表面実装型アンテナは、前記複数の放射電極の開放端に、それぞれギャップを介して近接してグランド電極を形成したことを特徴とする。 [0007] The surface-mounted antenna of the present invention, the open end of the plurality of radiation electrodes, respectively, characterized in that the formation of the ground electrode in close proximity through the gap.

【0008】また、本発明の表面実装型アンテナは、前記複数の放射電極は、互いに共振周波数が異なることを特徴とする。 [0008] The surface-mounted antenna of the present invention, the plurality of radiation electrodes is characterized in that the resonance frequencies are different from each other.

【0009】また、本発明の通信機は、上記の表面実装型アンテナを搭載したことを特徴とする。 [0009] The communication apparatus of the present invention is characterized by mounting the above surface-mounted antenna.

【0010】このように、構成することにより、本発明の表面実装型アンテナによれば、複数の周波数で利用可能なアンテナを形成したり、周波数帯域の足し合わせによる広帯域のアンテナを形成することができる。 [0010] By thus constituting, according to the surface-mounted antenna of the present invention, or to form a usable antenna at a plurality of frequencies, to form a broadband antenna by matching sum frequency band it can. また、 Also,
放射電極のレイアウトの自由度が高くなり、放射電極間の相互干渉を小さくすることができる。 Degree of freedom in the layout of the radiation electrode is increased, it is possible to reduce the mutual interference between the radiation electrodes.

【0011】また、本発明の通信機においては、小型化と特性の改善を図ることができる。 [0011] In the communication apparatus of the present invention, it is possible to improve the miniaturization and characteristics.

【0012】 [0012]

【発明の実施の形態】図1に、本発明の表面実装型アンテナの一実施例を示す。 DETAILED DESCRIPTION OF THE INVENTION Figure 1 shows an embodiment of a surface mount antenna of the present invention. 図1において、表面実装型アンテナ1は、絶縁体の1つであるセラミックス、樹脂等の誘電体からなる直方体状の基体2と、基体2の一方主面に形成されたグランド電極3、基体2の他方主面に形成されたストリップ状の長さλ/4近似の2つの放射電極4および5、2つの給電電極6および7、結合電極8で構成されている。 In Figure 1, a surface mount antenna 1, the ceramic is one of the insulator, a rectangular substrate 2 made of a dielectric such as resin, a ground electrode 3 formed on one main surface of the substrate 2, the substrate 2 the other main surface which is formed on a strip of a length of lambda / 4 approximates two radiation electrodes 4 and 5, two feed electrodes 6 and 7, and a coupling electrode 8. このうち、放射電極4および5はミアンダ状に折れ曲がり、その一端は開放端を形成し、他端は基体2の1つの端面を介してグランド電極3に接続されている。 Among them, the radiation electrode 4 and 5 bent in meander shape, one end forms an open end, the other end is connected to the ground electrode 3 via the one end face of the base 2. また、給電電極6および7の一端は、それぞれ放射電極4および5の一端と、ギャップg1およびg One end of the feeding electrode 6 and 7, one end of each radiation electrode 4 and 5, the gap g1 and g
2を介して形成され、他端は基体2の1つの端面に対向する別の端面において、ともに結合電極8に接続されている。 Is formed through a 2, the other end in the other end surface facing the one end face of the base body 2, are connected together to the coupling electrode 8. さらに、放射電極4は放射電極5より少し長く形成されている。 Furthermore, the radiation electrode 4 is formed from the radiation electrode 5 a little longer. なお、9は固定電極で、表面実装型アンテナ1を基板に実装するときに、基板上の電極との間で半田付けされる。 Incidentally, 9 is fixed electrode, when implementing the surface mount antenna 1 to the substrate, are soldered between the electrodes on the substrate.

【0013】本実施例の電気的等価回路を図2に示す。 [0013] The electrical equivalent circuit of this embodiment shown in FIG.
図2において、表面実装型アンテナ1の等価回路は、放射電極4および5の自己インダクタンスであるインダクタL1およびL2、放射電極4および5から放射するエネルギーを抵抗による損失に置き換えた場合の抵抗としての抵抗R1およびR2、放射電極4および5とグランド電極2との間で形成される容量であるコンデンサC1 2, the equivalent circuit of the surface mount antenna 1, as the resistance in the case of replacing the inductors L1 and L2 is a self inductance of the radiation electrode 4 and 5, the energy radiated from the radiation electrode 4 and 5 in the resistive losses resistors R1 and R2, the capacitor C1 is a capacitance formed between the radiation electrode 4 and 5 and the ground electrode 2
およびC2、放射電極4および5の一端と給電電極6および7の一端との間で形成される容量であるコンデンサC3およびC4、そして信号入力端子p1で構成される。 And C2, consisting of a capacitor C3 and C4, and the signal input terminal p1 is a capacitance formed between the first ends of the feeding electrode 6 and 7 of the radiation electrode 4 and 5. このうちインダクタL1と抵抗R1は直列に接続され、これにコンデンサC1が並列に接続され、その一端は接地され、他端はコンデンサC3を介して信号入力端子p1に接続されている。 Among inductor L1 and resistor R1 are connected in series, which capacitor C1 is connected in parallel to, one end of which is grounded and the other end is connected to the signal input terminal p1 via the capacitor C3. さらに、インダクタL2と抵抗R2は直列に接続され、これにコンデンサC2が並列に接続され、その一端は接地され、他端はコンデンサC Furthermore, the inductor L2 and the resistor R2 are connected in series, which capacitor C2 is connected in parallel to, one end of which is grounded, the other end capacitor C
4を介して同じく信号入力端子p1に接続されている。 4 through is likewise connected to the signal input terminal p1.

【0014】次に図2の等価回路を用いて、表面実装型アンテナ1の動作を説明する。 [0014] Next, using an equivalent circuit of FIG. 2, the operation of the surface mount antenna 1. 表面実装型アンテナ1の共振回路は2つあり、1つは主としてインダクタL1、 Resonant circuit of the surface mount antenna 1 is two, one mainly inductors L1,
抵抗R1、コンデンサC1で構成され、もう1つは主としてインダクタL2、抵抗R2、コンデンサC2で構成される。 Resistor R1, is a capacitor C1, and one primarily inductor L2, resistors R2, constituted by a capacitor C2. そして、2つの共振回路の共振周波数は異なるものとなっている。 Then, the resonance frequencies of the two resonant circuits has a different.

【0015】信号入力端子p1からコンデンサC3およびC4を介してそれぞれの共振回路に信号が入力されると、その信号の周波数に応じていずれかもしくは両方の共振回路で共振し、そのエネルギーの一部が空中に放射され、アンテナとして機能する。 [0015] When the signal from the signal input terminal p1 in each of the resonant circuit through the capacitor C3 and C4 are input to resonate in the resonant circuit of either or both, depending on the frequency of the signal, part of its energy There is radiation in the air, to function as an antenna. この放射されるエネルギーは、等価回路的には抵抗R1およびR2で消費されるエネルギーとして表されている。 Energy this radiation, the equivalent circuit is represented as an energy to be consumed by the resistors R1 and R2.

【0016】図3および図4に、本実施例の表面実装型アンテナの反射特性を示す。 [0016] Figures 3 and 4 show the reflection characteristics of the surface-mounted antenna of the present embodiment. 図3は2つの共振回路の共振周波数の差が大きく相互の重なりがない場合を、図4 Figure 3 is a case where the difference of the resonance frequencies of the two resonant circuits is large there is no overlap in each other, Figure 4
は2つの共振回路の共振周波数の差が小さく相互の重なりがある場合を示している。 The difference in the resonance frequencies of the two resonant circuits indicates a case where there is an overlap smaller mutual. これより、図3のように共振周波数の差が大きいときには2つの異なる周波数に対応するアンテナとして動作し、図4のように共振周波数の差が小さいときには、2つの共振特性が重なって、帯域の広いアンテナとして動作する。 Than this operates as an antenna corresponding to two different frequencies when the difference of resonance frequency is large as shown in FIG. 3, when a small difference in the resonance frequency as shown in Figure 4, overlap two resonance characteristics of the band to operate as a wide antenna.

【0017】このように、1つの基体に共振周波数の異なる2つの共振回路を設けることにより2つの周波数を有するアンテナとして機能させたり、2つの共振回路の共振周波数の差を小さくしておくことによりアンテナの周波数帯域を広げたりすることもできる。 [0017] Thus, by previously or to serve as an antenna having two frequencies by providing two resonant circuits having different resonant frequencies to one substrate, reduce the difference between the resonant frequencies of the two resonant circuits it is also possible to widen the frequency band of the antenna. また、2つの放射電極4および5に対してそれぞれ給電電極6および7を設けることにより、放射電極のレイアウトの自由度が広がり、また、2つの給電電極6および7と放射電極4および5との間の容量が2つの放射電極4と5の間の容量に比べて十分に大きいため、2つの放射電極4および5の間の相互干渉を抑えることもできる。 Further, by providing the respective feeding electrode 6 and 7 for the two radiation electrodes 4 and 5, spreading the freedom of layout of the radiation electrode, also, the two power supply electrodes 6 and 7 and the radiation electrode 4 and 5 since capacitance between is sufficiently larger than the capacitance between the two radiation electrodes 4 and 5, it is also possible to suppress the mutual interference between the two radiation electrodes 4 and 5. さらには、 Moreover,
放射電極4と5の形状や配置を変えることによりアンテナの指向性パターンを変化させることもできる。 It is also possible to change the directivity pattern of the antenna by changing the shape and arrangement of the radiation electrode 4 and 5. そして、2つの放射電極を1つの基体に構成することにより、2つのアンテナを用いる場合に比べて小形化が実現でき、実装コストの低減も可能となる。 By configuring the two radiation electrodes on one substrate, compared with the case of using two antennas downsizing can be realized, it is possible implementation cost.

【0018】本発明の表面実装型アンテナの別の実施例を図5に示す。 [0018] Another embodiment of a surface mount antenna of the present invention shown in FIG. 図5で、図1と同一もしくは同等の部分には同じ記号を付し、その説明は省略する。 In Figure 5, the same reference numerals are given to the same or equivalent portions as in FIG. 1, a description thereof will be omitted. 図5に示した表面実装型アンテナ10において、ストリップ状の長さλ/4近似の2つの放射電極11および12が、基体2の他方主面から1つの端面にかけて形成され、その一端は1つの端面において開放端を形成し、他端は対向する別の端面を介してグランド電極3に接続されている。 In the surface mount antenna 10 shown in FIG. 5, the strip-like two lengths lambda / 4 approximation of the radiation electrodes 11 and 12 are formed over the one end face from the other main surface of the base 2, one end of one the open end is formed at the end face, the other end is connected to the ground electrode 3 via the other end face opposed.
また、放射電極11および12の開放端が形成された端面において、放射電極11および12の一端に、それぞれギャップg3およびg4を介して2つの給電電極13 Further, the end faces open end of the radiation electrode 11 and 12 are formed, the radiation at one end of the electrode 11 and 12, respectively, through the gaps g3 and g4 2 two feeding electrodes 13
および14の一端が形成され、その他端は同じ端面においてともに結合電極8に接続されている。 And one end of 14 is formed, the other end is connected to both coupling electrode 8 at the same end face. さらに、放射電極11は放射電極12より少し長く形成されている。 Furthermore, the radiation electrode 11 is formed slightly longer than the radiation electrode 12.

【0019】図5においては、放射電極11および12 [0019] In Figure 5, the radiation electrode 11 and 12
の一端と給電電極13および14とが、基体2の他方主面ではなく1つの端面に形成されている点のみが図1の実施例とは異なるが、等価回路的には同等であり、図1 One end of the power feeding electrodes 13 and 14, but only that it is formed in one end face rather than the other main surface of the substrate 2 is different from the embodiment of FIG 1, it is equivalent to the equivalent circuit, FIG. 1
の実施例と同じように機能し、同様の作用・効果を示す。 Example equally function if, shows the same effects.

【0020】本発明の表面実装型アンテナのさらに別の実施例を図6に示す。 [0020] Yet another embodiment of a surface mount antenna of the present invention shown in FIG. 図6で、図1と同一もしくは同等の部分には同じ記号を付し、その説明は省略する。 In Figure 6, the same reference numerals are given to the same or equivalent portions as in FIG. 1, a description thereof will be omitted. 図6 Figure 6
に示した表面実装型アンテナ20において、ストリップ状の長さλ/4近似の2つの放射電極21および22 In the surface mount antenna 20 shown in, two radiation of the strip-like length lambda / 4 approximates electrodes 21 and 22
が、基体2の他方主面に形成され、その一端は同じ他方主面において開放端を形成し、他端はそれぞれ互いに対向する2つの端面を介してグランド電極3に接続されている。 But is formed on the other main surface of the base 2, one end forms an open end at the same the other main surface, the other end is connected to the ground electrode 3 via two end faces respectively facing each other. また、基体2の他方主面において、放射電極21 Further, the other main surface of the substrate 2, the radiation electrode 21
および22の一端とそれぞれギャップg5およびg6を介して2つの給電電極23および24の一端が形成され、その他端は隣接する端面においてともに結合電極8 And one end each end of the two feeding electrodes 23 and 24 through the gap g5 and g6 22 are formed, together coupling electrode 8 at the end face the other end adjacent
に接続されている。 It is connected to the. さらに、放射電極21は放射電極2 Furthermore, the radiation electrode 21 is the radiation electrode 2
2より少し長く形成されている。 It is formed a little longer than 2.

【0021】図6においては、放射電極21および22 [0021] In Figure 6, the radiation electrode 21 and 22
の他端が、基体2の同じ端面ではなく、それぞれ互いに対向する2つの端面を介してグランド電極3に接続されている点のみが図1の実施例とは異なるが、等価回路的には同等であり、同じように機能し、同様の作用・効果を示す。 The other end of, rather than the same end face of the base body 2, equivalent to different, equivalent circuit is only that it is connected to the ground electrode 3 via the two end surfaces facing each other is the embodiment of FIG. 1 , and the function in the same way, shows the same effects.

【0022】図7に、本発明の表面実装型アンテナのさらに別の実施例を示す。 [0022] FIG. 7 illustrates yet another embodiment of a surface mount antenna of the present invention. 図7で、図1と同一もしくは同等の部分には同じ記号を付し、その説明は省略する。 In Figure 7, the same reference numerals are given to the same or equivalent portions as in FIG. 1, a description thereof will be omitted. 図7において、表面実装型アンテナ30は、直方体状の基体2と、基体2の1つの端面に設けられたグランド電極31および32、基体2の他方主面に形成されたストリップ状の2つの放射電極33および34、2つの給電電極35および36、結合電極8で構成されている。 7, a surface mount antenna 30 includes a rectangular base 2, the base 2 of one of the ground electrodes 31 and 32 provided on the end face, of the two strip-like formed on the other main surface of the substrate 2 radiation electrodes 33 and 34, 2 single feed electrode 35 and 36, and a coupling electrode 8. このうち、放射電極33および34はコ字状に形成され、その一端は開放端を形成し、他端はグランド電極31および32にそれぞれ接続されている。 Among them, the radiation electrode 33 and 34 are formed in a U-shape, one end forms an open end, the other end is connected to the ground electrode 31 and 32. また、給電電極35 Further, the feeding electrode 35
および36の一端は、基体2の他方主面において放射電極33および34の一端と、それぞれギャップg7およびg8を介して形成され、他端は基体2の他方主面に隣接する1つの端面において、ともに結合電極8に接続されている。 And 36 one end of the one end of the radiation electrode 33 and 34 in the other main surface of the substrate 2, are formed respectively through the gap g7 and g8, the other end in one end surface adjacent to the other main surface of the substrate 2, It is connected with the coupling electrode 8. さらに、放射電極33は放射電極34より少し長く形成されている。 Furthermore, the radiation electrode 33 is formed slightly longer than the radiation electrode 34. なお、37は固定電極で、表面実装型アンテナ30を基板に実装するときに、基板上の電極との間で半田付けされる。 Incidentally, 37 is a fixed electrode, when implementing the surface mount antenna 30 to the substrate, are soldered between the electrodes on the substrate.

【0023】本実施例の電気的等価回路は、図1の実施例における基体2の他方主面に形成された放射電極4および5と基体2の一方主面に形成されたグランド電極3 The electrical equivalent circuit of this embodiment, a ground electrode 3 formed on one main surface of the embodiment and the radiation electrode 4 and 5 formed on the other main surface of the substrate 2 in the base body 2 in FIG. 1
との間の容量を表すコンデンサC1およびC2が、基体2の他方主面に形成された放射電極33および34と基体2の1つの端面に形成されたグランド電極31および32、さらには表面実装型アンテナ30を実装した基板に形成されているグランド電極との間の容量に置き換えられる以外は図2の等価回路と同等であり、図1の実施例と同じように機能し、同様の作用・効果を示す。 Capacitors C1 and C2, the base radiation electrode 33 formed on the other main surface of the 2 and 34 and the substrate 2 of the one ground electrode 31 and 32 formed on the end face, more surface mount type represents the capacitance between the except for substituting the capacitance between the ground electrode formed on the board mounted with the antenna 30 is equivalent to the equivalent circuit of FIG. 2, and functions in the same manner as in example 1, the same operations and effects It is shown.

【0024】本発明の表面実装型アンテナのさらに別の実施例を図8に示す。 [0024] Yet another embodiment of a surface mount antenna of the present invention shown in FIG. 図8で、図7と同一もしくは同等の部分には同じ記号を付し、その説明は省略する。 In Figure 8, the same reference numerals are given to the same or equivalent portions as in FIG. 7, a description thereof will be omitted. 図8 Figure 8
に示した表面実装型アンテナ40において、ストリップ状の2つの放射電極41および42は基体2の1つの端面から他方主面、別の端面、さらに他方主面にかけてコ字状に形成され、その一端は1つの端面において開放端を形成し、他端は同じ端面においてグランド電極31および32に接続されている。 In the surface mount antenna 40 shown, the two radiation electrodes 41 and 42 of the strip-like and the other main surface, another end surface from one end surface of the base body 2, is formed in a U-shape further to the other main surface, one end forms an open end at one end face and the other end is connected to the ground electrode 31 and 32 at the same end face. また、基体2の1つの端面において、放射電極41および42の一端と、それぞれギャップg9およびg10を介して給電電極43および44の一端が形成され、その他端は同じ端面においてともに結合電極8に接続されている。 Further, in one end face of the base 2, one end of the radiation electrode 41 and 42, one end of the feeding electrode 43 and 44 respectively through the gaps g9 and g10 is formed, and the other end connected to both coupling electrode 8 at the same end face It is. さらに、放射電極4 Furthermore, the radiation electrode 4
1は放射電極42より少し長く形成されている。 1 is formed slightly longer than the radiation electrode 42. なお、 It should be noted that,
45は固定電極で、放射電極41および42と1つの端面において接続されており、表面実装型アンテナ40を基板に実装するときに、基板上の電極との間で半田付けされる。 45 is a fixed electrode, which is connected at one end surface and the radiation electrode 41 and 42, when implementing the surface mount antenna 40 to the substrate, are soldered between the electrodes on the substrate.

【0025】図8においては、放射電極41および42 [0025] In Figure 8, the radiation electrode 41 and 42
が他方主面と互いに対向する2つの端面にわたって形成され、その一端と給電電極43および44が1つの端面に形成されている点のみが図7の実施例とは異なるが、 There is formed over the two end faces facing each other with the other main surface, although one end and the feeding electrode 43 and 44 thereof only that it is formed in one end face is different from the embodiment of FIG. 7,
等価回路的には同等であり、図7の実施例と同じように機能し、同様の作用・効果を示す。 The equivalent circuit is equivalent, functions the same as the embodiment of FIG. 7 shows the same effects.

【0026】本発明の表面実装型アンテナのさらに別の実施例を図9に示す。 [0026] Yet another embodiment of a surface mount antenna of the present invention shown in FIG. 図9で、図7と同一もしくは同等の部分には同じ記号を付し、その説明は省略する。 In Figure 9, the same reference numerals are given to the same or equivalent portions as in FIG. 7, a description thereof will be omitted. 図9 Figure 9
に示した表面実装型アンテナ50において、ストリップ状の2つの放射電極51および52は基体2の1つの端面から他方主面にかけてコ字状に形成され、その一端は1つの端面において開放端を形成し、他端は同じ端面においてグランド電極31および32に接続されている。 In the surface mount antenna 50 shown in the two radiation electrodes 51 and 52 of the strip-shaped is formed from one end face of the base body 2 in a U-shape to the other main surface, one end forming an open end at one end face and the other end is connected to the ground electrode 31 and 32 at the same end face.
また、放射電極51および52の開放端の形成された端面において、放射電極51および52の開放端に、それぞれギャップg13およびg14を介してグランド電極53および54が形成されている。 Further, the end surface formed at the open end of the radiation electrode 51 and 52, the open end of the radiation electrode 51 and 52, the ground electrode 53 and 54 through the gaps g13 and g14 respectively are formed. さらに、同じ放射電極51および52の一端に、ギャップg11およびg1 Further, one end of the same radiation electrode 51 and 52, a gap g11 and g1
2を介して隣接して、2つの給電電極55および56の一端が形成され、その他端は隣接する端面においてともに結合電極8に接続されている。 Adjacent via 2, the one end of the two feed electrodes 55 and 56 are formed, the other end is connected to both coupling electrode 8 at the end face adjacent. さらに、放射電極51 Furthermore, the radiation electrode 51
は放射電極52より少し長く形成されている。 It is formed slightly longer than the radiation electrode 52.

【0027】図9においては、放射電極51および52 [0027] In Figure 9, the radiation electrode 51 and 52
が他方主面と1つの端面にわたって形成され、その開放端にギャップg13およびg14を介してグランド電極53および54が形成され、給電電極55および56が放射電極51および52の一端にそれぞれ隣接して形成されている点が図7の実施例とは異なる。 There is formed over the other main surface and one end surface, the ground electrode 53 and 54 is formed via a gap g13 and g14 in its open end, the feeding electrode 55 and 56 adjacent to one end of the radiation electrode 51 and 52 that it is formed it is different from the embodiment of FIG. 等価回路的には給電電極55および56と放射電極51および52との容量が図2のc3およびC4に相当し、放射電極51 The equivalent circuit capacitance between the feeding electrode 55 and 56 and the radiation electrode 51 and 52 correspond to c3 and C4 in Figure 2, the radiation electrode 51
および52の開放端とグランド電極53および54との間の容量が図2の等価回路に付加される形になるが、これは放射電極51および52の開放端とグランド電極3 And although 52 capacitance between the open end and the ground electrode 53 and 54 is in the form to be added to the equivalent circuit of FIG. 2, which is the open end and the ground electrode 3 of the radiation electrode 51 and 52
1および32との間の容量であるコンデンサC1およびC2に対して並列に入るために、コンデンサC1およびC2に吸収してまとめることができ、最終的に図2の等価回路と同じにすることができる。 To enter in parallel to the capacitors C1 and C2 is a capacitance between one and 32, it can be summarized by absorbing the capacitors C1 and C2, and finally be the same as the equivalent circuit of FIG. 2 it can. したがって図7の実施例と同じように機能し、同様の作用・効果を示す。 Thus functions in the same manner as the embodiment of FIG. 7 shows the same effects.

【0028】なお、上記の各実施例においては、一方の放射電極の長さを他方の放射電極の長さより長く形成するとしたが、これは逆でも良い。 [0028] In each embodiment described above, the length of one of the radiation electrodes has been to form longer than the length of the other radiation electrode, which may be reversed. また、放射電極の数を2つとしたが、これは2つに限るものではなく、3つ以上の放射電極を設けても良い。 In addition, although two and the number of radiation electrode, which is not limited to two, may be provided three or more radiation electrodes. また、2つの放射電極の長さが少し異なるとしたが、2つの共振回路の共振周波数が異なるようになるものであれば、放射電極と給電電極とのギャップの大きさが異なるなどの別の形状の違いでも構わない。 Further, the length of the two radiation electrodes are slightly different, as long as the resonant frequencies of the two resonant circuits is different, the gap between the radiation electrode and the feeding electrode different sizes such as another of it may be a difference in shape. また、放射電極としてミアンダ状やコ字状のものを採用したが、これは直線状やL字状などの別の形状で構成しても同等の作用・効果を得ることができる。 Although adopted what meander shape or U-shape as a radiation electrode, which can obtain the same operation and effect can be configured in a different shape such as a straight or L-shaped. さらに、基体を構成する絶縁体として誘電体を用いたが、これは磁性体を用いても良い。 Furthermore, although a dielectric as the insulating material constituting the substrate, which may be of a magnetic material.

【0029】図10に、本発明の通信機の一実施例を示す。 [0029] FIG. 10 shows an embodiment of a communication device of the present invention. 図10において、通信機60は筐体61の中に実装基板62が設けられ、実装基板62にはグランド電極6 10, the communication device 60 mounting board 62 in the housing 61 is provided, the ground on the mounting board 62 electrode 6
3および給電電極64が形成されている。 3 and the feeding electrode 64 is formed. 実装基板62 The mounting board 62
の端部には本発明の表面実装型アンテナ1が搭載されている。 The end surface mount antenna 1 of the present invention is mounted. 表面実装型アンテナ1の結合電極とグランド電極(図示せず)は実装基板62の給電電極64とグランド電極63にそれぞれ接続されている。 (Not shown) coupling electrode and the ground electrode of the surface mount antenna 1 is connected to the feeding electrode 64 and the ground electrode 63 of the mounting substrate 62. さらに、給電電極64は実装基板62上に形成された切換回路65を介して、同じく実装基板62上に形成された送信回路66および受信回路67に接続されている。 Further, the feeding electrode 64 via a switching circuit 65 formed on the mounting substrate 62, and is also connected to the mounting substrate 62 transmitting circuit 66 is formed on and receiving circuit 67.

【0030】このように、本発明の表面実装型アンテナ1を実装基板62の端部に搭載することにより、2つのアンテナ機能を1つのアンテナで実現して通信機60の小型化とコストダウンを図ることができる。 [0030] Thus, by mounting the end of the surface mount antenna 1 mounting substrate 62 of the present invention, the to communication device 60 implementing two antennas functions in one antenna miniaturization and cost reduction it is possible to achieve. また、同時に通信機60の周波数帯域を広げるなどの特性の改善を図ることができる。 Further, it is possible to improve the characteristics such as simultaneously widening the frequency band of the communication device 60.

【0031】なお、図10の実施例においては表面実装型アンテナ1を搭載して通信機60を構成したが、図5 It should be noted, it has been a communication unit 60 equipped with a surface mount antenna 1 in the embodiment of FIG. 10, FIG. 5
ないし図9に示した表面実装型アンテナ10、20、3 Or a surface mount antenna 10,20,3 shown in FIG. 9
0、40または50を搭載して通信機を構成しても同様の作用効果を奏するものである。 Be constituted equipped to communicate machine 0, 40 or 50 in which the same effects.

【0032】 [0032]

【発明の効果】本発明の表面実装型アンテナによれば、 According to the surface mount antenna of the present invention,
放射電極の開放端に、それぞれギャップを介して複数の給電電極の一端を形成し、その複数の給電電極の他端を1つにまとめて結合電極に接続することにより、小型で、複数の周波数で利用可能なアンテナを形成したり、 The open end of the radiation electrode, by each other via a gap forming a part of a plurality of power supply electrodes, connected to the coupling electrode together the other end of the plurality of power supply electrodes to one, a small, multiple frequencies in or to form the available antennas,
周波数帯域の足し合わせによる広帯域のアンテナを形成することができる。 It is possible to form the broadband antenna according to alignment sum frequency bands. また、放射電極のレイアウトの自由度が高くなり、放射電極間の相互干渉を小さくすることができる。 Also, flexibility of the layout of the radiation electrode is increased, it is possible to reduce the mutual interference between the radiation electrodes. さらにはアンテナの小形化と実装コストの低減も可能となる。 Furthermore it becomes possible to reduce the miniaturization and mounting cost of the antenna.

【0033】また、本発明の通信機によれば、本発明の表面実装型アンテナを搭載して構成することにより、小型化とコストダウン、および特性の改善を図ることができる。 Further, according to the communication apparatus of the present invention, by constituting mounted surface-mounted antenna of the present invention, it is possible to improve the miniaturization and cost reduction, and characteristics.

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS

【図1】本発明の表面実装型アンテナの一実施例を示す透視斜視図である。 1 is a transparent perspective view showing an embodiment of a surface mount antenna of the present invention.

【図2】図1の表面実装型アンテナの等価回路を示す回路図である。 2 is a circuit diagram showing an equivalent circuit of the surface mount antenna of FIG.

【図3】図1の表面実装型アンテナの反射特性を示す図である。 3 is a diagram showing the reflection characteristics of the surface mount antenna of FIG.

【図4】図1の表面実装型アンテナの反射特性を示す別の図である。 4 is another diagram showing the reflection characteristics of the surface mount antenna of FIG.

【図5】本発明の表面実装型アンテナの別の実施例を示す透視斜視図である。 5 is a transparent perspective view showing another embodiment of a surface mount antenna of the present invention.

【図6】本発明の表面実装型アンテナのさらに別の実施例を示す透視斜視図である。 6 is a transparent perspective view showing still another embodiment of a surface mount antenna of the present invention.

【図7】本発明の表面実装型アンテナのさらに別の実施例を示す透視斜視図である。 7 is a transparent perspective view showing still another embodiment of a surface mount antenna of the present invention.

【図8】本発明の表面実装型アンテナのさらに別の実施例を示す透視斜視図である。 8 is a transparent perspective view showing still another embodiment of a surface mount antenna of the present invention.

【図9】本発明の表面実装型アンテナのさらに別の実施例を示す透視斜視図である。 9 is a transparent perspective view showing still another embodiment of a surface mount antenna of the present invention.

【図10】本発明の通信機の一実施例を示す斜視図である。 Is a perspective view showing an embodiment of a communication device of the present invention; FIG.

【符号の説明】 DESCRIPTION OF SYMBOLS

1、10、20、30、40、50…表面実装型アンテナ 2…基体 3、31、32…グランド電極 4、5、11、12、21、22、33、34、41、 1,10,20,30,40,50 ... surface-mounted antenna 2 ... substrate 3, 31, 32 ... ground electrode 4,5,11,12,21,22,33,34,41,
42、51、52…放射電極 6、7、13、14、23、24、35、36、43、 42,51,52 ... radiation electrode 6,7,13,14,23,24,35,36,43,
44、55、56…給電電極 8…結合電極 g1、g2、g3、g4、g5、g6、g7、g8、g 44,55,56 ... feeding electrode 8 ... coupling electrodes g1, g2, g3, g4, g5, g6, g7, g8, g
9、g10、g11、g12…ギャップ 60…通信機 9, g10, g11, g12 ... gap 60 ... communication equipment

Claims (5)

    【特許請求の範囲】 [The claims]
  1. 【請求項1】 絶縁体よりなる直方体状の基体の、一方主面にグランド電極が形成され、前記基体の少なくとも他方主面にストリップ状の複数の放射電極が形成された表面実装型アンテナであって、 前記複数の放射電極の一端はそれぞれ前記基体の他方主面あるいはいずれかの端面で開放端を形成し、他端はそれぞれ前記グランド電極と接続し、 前記複数の放射電極の一端に、それぞれギャップを介して複数の給電電極の一端を形成し、前記複数の給電電極の他端は前記基体のいずれかの面に形成された結合電極に接続されていることを特徴とする表面実装型アンテナ。 1. A rectangular parallelepiped-shaped base made of an insulating material, whereas the ground electrode is formed on the main surface, there at least the other main surface into strips of the plurality of radiation electrodes surface mount antenna, which is formed of the base Te, wherein one end of the plurality of radiation electrodes forming the other major surface or open end in one of the end faces of each of the base and the other end connected to each of the ground electrode, one end of the plurality of radiation electrodes, respectively through the gap to form one end of the plurality of power supply electrodes, the plurality of the other end of the feeding electrode is surface-mounted antenna, characterized in that it is connected to a coupling electrode formed on one surface of the base body .
  2. 【請求項2】 絶縁体よりなる直方体状の基体の、一方主面と他方主面と4つの端面の少なくとも1つの面に、 On at least one surface of 2. A rectangular parallelepiped-shaped base made of an insulating material, one main surface and other main surface and four end faces,
    複数のグランド電極と、ストリップ状の複数の放射電極が形成された表面実装型アンテナであって、 前記複数の放射電極の一端はそれぞれ開放端を形成し、 A plurality of ground electrodes, a surface-mounted antenna strip of the plurality of radiation electrodes are formed, one end of the plurality of radiation electrodes forming the respective open ends,
    他端は前記複数のグランド電極とそれぞれ接続し、 前記複数の放射電極の一端にそれぞれギャップを介して複数の給電電極の一端を形成し、前記複数の給電電極の他端は前記基体のいずれかの面に形成された結合電極に接続されていることを特徴とする表面実装型アンテナ。 The other end is connected respectively with said plurality of ground electrodes, with a gap to one end of the plurality of radiation electrodes forming one end of a plurality of power supply electrodes, the other end of said plurality of power supply electrodes either the substrate surface mount antenna characterized in that it is connected to a coupling electrode formed on the surface of.
  3. 【請求項3】 前記複数の放射電極の開放端に、それぞれギャップを介して近接してグランド電極を形成したことを特徴とする、請求項1または2に記載の表面実装型アンテナ。 To 3. A open end of the plurality of radiation electrodes, characterized in that the formation of the ground electrode, respectively in proximity via a gap, a surface-mounted antenna according to claim 1 or 2.
  4. 【請求項4】 前記複数の放射電極は、互いに共振周波数が異なることを特徴とする、請求項1ないし3のいずれかに記載の表面実装型アンテナ。 Wherein said plurality of radiation electrodes is characterized by different resonance frequencies from each other, surface-mounted antenna according to any one of claims 1 to 3.
  5. 【請求項5】 請求項1ないし4のいずれかに記載の表面実装型アンテナを搭載したことを特徴とする通信機。 5. A communication apparatus characterized by mounting the surface-mounted antenna according to any one of claims 1 to 4.
JP10081335A 1997-04-18 1998-03-27 Surface mount antenna and communication apparatus using the same Pending JPH114113A (en)

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Cited By (54)

* Cited by examiner, † Cited by third party
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US6333714B1 (en) 1999-08-18 2001-12-25 Alps Electric Co., Ltd. On-vehicle antenna having wide frequency range
JP2002050924A (en) * 2000-08-01 2002-02-15 Sansei Denki Kk Broad band incorporating antenna and its configuration method
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US6850779B1 (en) 1999-05-21 2005-02-01 Matsushita Electric Industrial Co., Ltd. Mobile communication antenna and mobile communication apparatus using it
US6980158B2 (en) 1999-05-21 2005-12-27 Matsushita Electric Industrial Co., Ltd. Mobile telecommunication antenna and mobile telecommunication apparatus using the same
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US6333714B1 (en) 1999-08-18 2001-12-25 Alps Electric Co., Ltd. On-vehicle antenna having wide frequency range
US6501425B1 (en) 1999-09-09 2002-12-31 Murrata Manufacturing Co., Ltd. Surface-mounted type antenna and communication device including the same
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US8493280B2 (en) 2004-11-12 2013-07-23 Fractus, S.A. Antenna structure for a wireless device with a ground plane shaped as a loop
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US8077110B2 (en) 2004-11-12 2011-12-13 Fractus, S.A. Antenna structure for a wireless device with a ground plane shaped as a loop
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