[go: up one dir, main page]

JP3700377B2 - Surface mount antenna and communication device equipped with the same - Google Patents

Surface mount antenna and communication device equipped with the same Download PDF

Info

Publication number
JP3700377B2
JP3700377B2 JP04944398A JP4944398A JP3700377B2 JP 3700377 B2 JP3700377 B2 JP 3700377B2 JP 04944398 A JP04944398 A JP 04944398A JP 4944398 A JP4944398 A JP 4944398A JP 3700377 B2 JP3700377 B2 JP 3700377B2
Authority
JP
Japan
Prior art keywords
electrode
base
face
ground
antenna
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Fee Related
Application number
JP04944398A
Other languages
Japanese (ja)
Other versions
JPH11251816A (en
Inventor
一也 川端
岡田  健
敦之 湯浅
正二 南雲
淳一 栗田
信人 椿
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Murata Manufacturing Co Ltd
Original Assignee
Murata Manufacturing Co Ltd
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 Murata Manufacturing Co Ltd filed Critical Murata Manufacturing Co Ltd
Priority to JP04944398A priority Critical patent/JP3700377B2/en
Publication of JPH11251816A publication Critical patent/JPH11251816A/en
Application granted granted Critical
Publication of JP3700377B2 publication Critical patent/JP3700377B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Landscapes

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

Description

【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搭載した通信機、特に移動体通信機などに用いられる表面実装型アンテナおよびそれを搭載した通信機に関する。
【0002】
【従来の技術】
近年の移動体通信機、特にPHSなどの携帯電話の小形化・軽量化が進む中で、そこに搭載されるアンテナにおいても更なる小形化、高利得化が要求されるようになってきている。
【0003】
に、従来の表面実装型アンテナとして、特開平10−13139号公報にその基本構成が示されている表面実装型アンテナを示す。図において、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や樹脂などの誘電体からなる直方体状の基体2の表面にいくつかの電極を形成して構成されている。まず、基体2の他方主面2bから1つの端面2dを介して再び他方主面2bにかけてストリップ状の放射電極3が形成されている。放射電極3の一端は開放端3aを形成し、他端は基体2の端面2cから一方主面2aにかけて形成されたグランド端子4に接続されている。また、基体2の他方主面2bには放射電極3に隣接して給電電極5が形成され、給電電極5の一端は基体2の端面2cから一方主面2aにかけて形成された給電端子6に接続されている。同じく、基体2の他方主面2bには放射電極3の開放端3aに近接してグランド電極7が形成され、グランド電極7の一端は基体2の端面2cから一方主面2aにかけて形成されたグランド端子8に接続されている。また、基体2の一方主面2aには放射電極3に接続して固定用端子9および10が形成されている。ここで、第1およびグランド端子4および8、給電端子6、固定用端子9および10の5つの電極は、表面実装型アンテナ1を実装基板(図示せず)に搭載するときに、実装基板側のグランド電極や給電線路、固定用電極と半田付けなどによって接続される電極であるため、その他の電極と区別するために端子と表現している。
【0004】
このように構成された表面実装型アンテナ1において、給電端子6に高周波信号が入力されると、給電電極5と放射電極3の開放端3aとの間に形成される静電容量を介して、放射電極3に高周波信号が伝達される。放射電極3は、放射電極3自身のインダクタンス成分と、開放端3aとグランド電極7との間に形成される静電容量とで共振し、その共振のエネルギーの一部が電波として空間に放射され、アンテナとして機能する。また逆に、表面実装型アンテナ1に入射した電波は放射電極3で共振し、そのエネルギーは放射電極3の開放端3aと給電電極5との間に形成される静電容量を介して給電電極5に伝達され、給電端子6から出力される。
【0005】
なお、表面実装型アンテナ1から放射される電波および受信する電波は、図に示す座標で主としてz軸方向にその電界成分が振動する電波となる。
【0006】
【発明が解決しようとする課題】
しかしながら、図の表面実装型アンテナ1において、更なる高利得化を図るためには基体2の厚みを厚くしたり、基体全体のサイズを大きくしたりする必要があり、小形化の要求とは矛盾するという問題があった。
【0007】
そこで、本発明は、形状を大きくすることなく利得を改善することのできる表面実装型アンテナおよびそれを搭載した通信機を提供することを目的とする。
【0008】
【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、接地電極が形成されている面の外側に隣り合って接地電極が形成されていない領域を有している実装基板の、前記接地電極が形成されていない領域内の前記接地電極が形成されている面の近くに実装される表面実装型アンテナであって、一方主面、他方主面および複数の端面を有する絶縁体からなる基体と、該基体の表面に一端を開放端として形成されたストリップ状の放射電極と、該放射電極の他端に接続して形成されたグランド端子と、前記放射電極の開放端に対応して形成された給電電極と、該給電電極に接続して形成された給電端子とを有し、前記放射電極は、その一部が前記基体の端面側に形成され、この端面側に形成される前記一部の放射電極は当該端面の上端側の稜線に沿って、当該稜線に隣接する前記端面と該端面から回り込ませた主面の端縁とに形成された両面に跨った経路幅をもつ経路と成し、この両面に跨った経路幅をもつ経路は前記基体が実装基板に実装される際に実装基板の前記接地電極に対面する側の基体の端面側とは反対側の実装基板の接地電極から離れた側の基体の端面側に形成されることを特徴とする。
【0009】
また、本発明の表面実装型アンテナは、前記放射電極の一部、前記グランド端子、および前記給電端子を、前記基体の端面に設けた凹部に形成したことを特徴とする。
【0010】
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。
【0011】
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は形状を大きくすることなく利得の改善を図ることができる。また本発明の表面実装型アンテナを搭載した通信機は小形化を図ることができる。
【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。図1で、図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。
【0013】
図1の表面実装型アンテナ20において、放射電極21は基体2の他方主面2bから端面2dを介して再び他方主面2bにかけてストリップ状に形成され、その一端は開放端21aを形成し、他端はグランド端子4に接続されている。そして、放射電極21のうち、基体2の端面2dに形成されている部分は、端面2dの縁部に沿って形成されるとともに、隣接する別の面である他方主面2bに回り込んで形成されている。
【0014】
図2に、本発明の表面実装型アンテナ20を実装基板に搭載した状態における平面図を示す。図2に示すように、本発明の表面実装型アンテナ20は、実装基板25の接地電極26を形成していないコーナー部分25aに実装される。
【0017】
なお、本願発明者の実験によれば、従来の表面実装型アンテナ1と本発明の表面実装型アンテナ20を比較した場合、帯域幅が14.4MHzから15.3MHzに、XY面利得(偏波面がX−Y面に垂直、すなわち電界成分がZ軸方向に振動する電波に対する利得)が最大で−2.9dBdから−2.7dBdに、平均で−4.7dBdから−4.5dBdにそれぞれ改善した。
【0018】
このように、放射電極21の一部を基体2の端面2dの縁部に沿って形成するとともに、他方主面2bに回り込んで形成することにより、表面実装型アンテナ20の利得を改善することができる。さらに、利得の改善が不要な場合には、その分だけ基体2の幅を狭くしたり厚みを薄くするなどして、表面実装型アンテナを小形化することもできる。
【0019】
図4に、本発明の表面実装型アンテナの別の実施例を示す。図4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。
【0020】
図4の表面実装型アンテナ30において、放射電極31は基体2の他方主面2bから端面2dを介して再び基体2の他方主面2bにかけてストリップ状に形成され、その一端は開放端31aを形成し、他端はグランド端子4に接続されている。そして、表面実装型アンテナ20と同様に、放射電極31のうち、基体2の端面2dに形成されている部分は、端面2dの縁部に沿って形成されるとともに、隣接する別の面である他方主面2bに回り込んで形成されている。さらに、放射電極31の基体2の他方主面2bに回り込んで形成された部分には、その内部に他方主面2bの縁部に接して2つのスリット31bが形成されている。
【0021】
このように、放射電極31のうち端面2dから他方主面2bに回り込んで形成された部分の一部にスリット31bを形成しても、表面実装型アンテナ20と同様の作用・効果を得ることができる。しかも、この場合は基体2の2つの面2b、2dの境界である角部に電極を形成しないため、スクリーン印刷で角部を印刷するときに生じる電極材料のたれ(ペースト状の電極材料が基体2の他方主面2bから端面2dの方に流れ落ちること)を少なくすることができ、外観不良などによる歩留まりの低下を防ぐことができる。
【0022】
図5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。図5で、表面実装型アンテナ40は、セラミックスや樹脂などの誘電体からなる略直方体状の基体41の表面にいくつかの電極を形成して構成されている。なお、表面実装型アンテナ40は、後述のように集合基板を分割して得られる子基板として形成されている。
【0023】
図5において、放射電極42は基体41の他方主面41bから端面41dに設けられた略半長円状の凹部51aの内側面を介して再び他方主面41bにかけてストリップ状に形成され、その一端は開放端42aを形成し、他端は端面41cに設けられた略半円状の凹部52aの内側面に形成されたグランド端子43に接続されている。そして、放射電極42のうち、凹部51aの内側面に形成されている部分は、凹部51aの縁部に沿って形成されるとともに、隣接する別の面である他方主面41bに回り込んで形成されている。また、基体41の他方主面41bには放射電極42の開放端42aに対応して給電電極44が形成され、給電電極44の一端は端面41cに設けられた略半円状の凹部53aの内側面に形成された給電端子45に接続されている。同じく、基体41の他方主面41bには放射電極42の開放端42aに近接してグランド電極46が形成され、グランド電極46の一端は端面41cに設けられた半円状の凹部54aの内側面に形成されたグランド端子47に接続されている。また、電極48は端面41cに設けられた半円状の凹部55aの内側面に形成されたダミー電極である。なお、ここで、基体41の端面に設けられた各凹部およびその内側面に形成された電極は、集合基板において子基板どうしが隣接している境界部にスルーホールを形成し、その内側面に電極を形成したものを、子基板に分割することによって得られるものである。
【0024】
ここで、基体の端面に凹部を形成する一手法としてスルーホールを用いたものについて説明する。図6に、表面実装型アンテナ40を子基板に分割する前の集合基板50を、子基板における基体41の他方主面41b側から見たものを示す。図6の集合基板50において、表面実装型アンテナ40は子基板の状態で分割線56を介して複数個連結して構成されており、隣接する子基板との境界部には1つの長円型のスルーホール51と4個のスルーホール52、53、54、55が形成されている。これより、スルーホール51ないし55の内側面の電極は、子基板に分割した状態で基体41の端面に設けられた略半長円状もしくは略半円状の凹部の内側面に形成された放射電極42の一部、グランド端子43、給電端子45、グランド端子47、ダミー電極48となることが分かる。
【0025】
このように、放射電極42の一部、グランド端子43、給電端子45、グランド端子47を基体41の端面に分割スルーホールで形成した場合、図1の表面実装型アンテナ20と同様の作用・効果が得られるとともに、表面実装型アンテナの多数個取りが可能となり、コストダウンを図ることができる。
【0026】
なお、基体の端面に設ける凹部はスルーホールを分割してなるものに限るわけではなく、別の方法によるものであっても構わないものである。
【0027】
また、上記の表面実装型アンテナの各実施例においては、基体を絶縁体の1つであるセラミックスや樹脂などの誘電体により構成したが、同じく絶縁体である磁性体よりなるものとしても構わないものである。また、上記の各実施例においては、説明上電極と端子を分離して形成していたが、これらは必ずしも何らかの境界で明確に分離できるものではなく、電極と端子が一体に形成されていても構わないものである。
【0028】
図7に、本発明の表面実装型アンテナを搭載した通信機の一実施例を示す。図7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63および給電電極64が形成されている。実装基板62のコーナー部分にはグランド電極63が形成されていない領域があり、ここに本発明の表面実装型アンテナ20が搭載されている。表面実装型アンテナ20のグランド端子と給電端子(図示せず)は実装基板62のグランド電極63および給電電極64にそれぞれ接続されている。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。
【0029】
このように、本発明の表面実装型アンテナ20を実装基板62に搭載することにより、通信機60の利得や帯域幅などのアンテナ特性を良くすることができる。逆に従来と同じアンテナ特性で良い場合には、搭載する表面実装型アンテナを小さくすることができ、これによって通信機60の小形化を図ることができる。
【0030】
なお、図7の実施例においては表面実装型アンテナ20を搭載して通信機60を構成したが、図4および図5に示した表面実装型アンテナ30または40を搭載して通信機を構成しても同様の作用・効果を生じるものである。
【0031】
【発明の効果】
本発明の表面実装型アンテナによれば、接地電極が形成されている面の外側に隣り合って接地電極が形成されていない領域を有している実装基板の、前記接地電極が形成されていない領域内の前記接地電極が形成されている面の近くに実装される表面実装型アンテナであって、放射電極は、その一部が基体の端面側に形成され、この端面側に形成される前記一部の放射電極は当該端面の上端側の稜線に沿って、当該稜線に隣接する前記端面と該端面から回り込ませた主面の端縁とに形成された両面に跨った経路幅をもつ経路と成し、この両面に跨った経路幅をもつ経路は前記基体が実装基板に実装される際に実装基板の前記接地電極に対面する側の基体の端面側とは反対側の実装基板の接地電極から離れた側の基体の端面側に形成される構成としたので、表面実装型アンテナの利得の向上を図ることができる。
【0032】
さらには、本発明の表面実装型アンテナを搭載して通信機を構成することにより、通信機のアンテナ利得の向上や小形化を図ることができる。
【図面の簡単な説明】
【図1】本発明の表面実装型アンテナの一実施例の斜視図である。
【図2】図1の表面実装型アンテナを実装基板に搭載した状態を示す平面図である。
【図3】 従来の表面実装型アンテナの斜視図である。
【図4】本発明の表面実装型アンテナの別の実施例の斜視図である。
【図5】本発明の表面実装型アンテナのさらに別の実施例の斜視図である。
【図6】図5の表面実装型アンテナを子基板に分割する前の集合基板を示す図である。
【図7】本発明の通信機の一実施例の斜視図である。
【符号の説明】
2…基体
2a…一方主面
2b…他方主面
2c、2d…端面
4、…グランド端子
5…給電電極
6…給電端子
9、10…固定用端子
20…表面実装型アンテナ
21…放射電極
21a…開放端
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a surface mount antenna and a communication device equipped with the surface mount antenna, and more particularly to a surface mount antenna used for a mobile communication device and the like and a communication device equipped with the surface mount antenna.
[0002]
[Prior art]
As mobile communication devices in recent years, especially mobile phones such as PHS, are becoming smaller and lighter, antennas mounted there are also required to be smaller and gain higher. .
[0003]
FIG. 3 shows a surface-mounted antenna whose basic configuration is shown in Japanese Patent Laid-Open No. 10-13139 as a conventional surface-mounted antenna. In FIG. 3 , a surface-mounted antenna 1 is configured by forming several electrodes on the surface of a rectangular parallelepiped base 2 made of a dielectric material such as ceramics or resin, which is one of insulators. First, a strip-shaped radiation electrode 3 is formed from the other main surface 2b of the substrate 2 to the other main surface 2b again through one end surface 2d. One end of the radiation electrode 3 forms an open end 3a, and the other end is connected to a ground terminal 4 formed from the end surface 2c of the base 2 to the one main surface 2a. A power supply electrode 5 is formed adjacent to the radiation electrode 3 on the other main surface 2b of the base 2, and one end of the power supply electrode 5 is connected to a power supply terminal 6 formed from the end surface 2c of the base 2 to the one main surface 2a. Has been. Similarly, a ground electrode 7 is formed on the other main surface 2b of the base 2 in the vicinity of the open end 3a of the radiation electrode 3, and one end of the ground electrode 7 is formed from the end surface 2c of the base 2 to the one main surface 2a. Connected to terminal 8. Further, fixing terminals 9 and 10 are formed on one main surface 2 a of the base 2 so as to be connected to the radiation electrode 3. Here, the five electrodes of the first and ground terminals 4 and 8, the feeding terminal 6, and the fixing terminals 9 and 10 are mounted on the mounting board side when the surface mount antenna 1 is mounted on a mounting board (not shown). The electrode is connected to the ground electrode, the feed line, and the fixing electrode by soldering or the like, and is therefore expressed as a terminal to be distinguished from other electrodes.
[0004]
In the surface-mounted antenna 1 configured as described above, when a high-frequency signal is input to the feeding terminal 6, via a capacitance formed between the feeding electrode 5 and the open end 3 a of the radiation electrode 3, A high frequency signal is transmitted to the radiation electrode 3. The radiation electrode 3 resonates with the inductance component of the radiation electrode 3 itself and the capacitance formed between the open end 3a and the ground electrode 7, and a part of the energy of the resonance is radiated into the space as a radio wave. , Function as an antenna. Conversely, the radio wave incident on the surface mount antenna 1 resonates at the radiation electrode 3, and the energy is fed through the capacitance formed between the open end 3 a of the radiation electrode 3 and the feed electrode 5. 5 and output from the power supply terminal 6.
[0005]
Incidentally, the radio wave of the radio wave and receiving radiated from the surface mount antenna 1, the electric field component mainly the z-axis direction in the coordinate shown in FIG. 3 is a wave that vibrates.
[0006]
[Problems to be solved by the invention]
However, in the surface-mounted antenna 1 of FIG. 3 , in order to further increase the gain, it is necessary to increase the thickness of the base 2 or increase the size of the whole base. There was a problem of contradiction.
[0007]
SUMMARY OF THE INVENTION An object of the present invention is to provide a surface mount antenna capable of improving gain without increasing the shape and a communication device equipped with the surface mount antenna.
[0008]
[Means for Solving the Problems]
In order to solve the above problems, a surface-mounted antenna according to the present invention includes a mounting substrate having a region where a ground electrode is not formed adjacent to the outside of a surface on which a ground electrode is formed. A surface-mounted antenna mounted near a surface on which the ground electrode is formed in a region where no ground electrode is formed, and is made of an insulator having one main surface, the other main surface, and a plurality of end surfaces. A base, a strip-like radiation electrode formed on the surface of the base with one end as an open end, a ground terminal connected to the other end of the radiation electrode, and an open end of the radiation electrode The power supply electrode formed and a power supply terminal connected to the power supply electrode, and the radiation electrode is partly formed on the end face side of the base, and the end face side is formed on the end face side. Some radiation electrodes are on the upper end side Along the edge, forms a path having a path width across both surfaces formed in the edge of the main surface was wrap from the end face and the end face adjacent to the ridge, the path width across the double-sided When the substrate is mounted on the mounting substrate, the path is formed on the end surface side of the substrate on the side away from the ground electrode of the mounting substrate opposite to the end surface side of the substrate on the side facing the ground electrode of the mounting substrate. It is characterized by Rukoto.
[0009]
The surface mount antenna of the present invention is characterized in that a part of the radiation electrode, the ground terminal, and the feeding terminal are formed in a recess provided on an end surface of the base.
[0010]
In addition, a communication device of the present invention is characterized in that the above-described surface mount antenna is mounted.
[0011]
With this configuration, the surface mount antenna of the present invention can improve the gain without increasing the shape. Further, a communication device equipped with the surface mount antenna of the present invention can be miniaturized.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 shows an embodiment of a surface mount antenna according to the present invention. In Figure 1, the same reference numerals are given to the same or equivalent portions as in FIG. 3, a description thereof will be omitted.
[0013]
In the surface-mounted antenna 20 of FIG. 1, the radiation electrode 21 is formed in a strip shape from the other main surface 2b of the base 2 to the other main surface 2b through the end surface 2d, and one end thereof forms an open end 21a. The end is connected to the ground terminal 4. A portion of the radiation electrode 21 formed on the end surface 2d of the base body 2 is formed along the edge of the end surface 2d and wraps around the other main surface 2b which is another adjacent surface. Has been.
[0014]
FIG. 2 shows a plan view of the surface mount antenna 20 of the present invention mounted on a mounting board. As shown in FIG. 2, the surface mount antenna 20 of the present invention is mounted on a corner portion 25a of the mounting substrate 25 where the ground electrode 26 is not formed.
[0017]
According to the experiment by the present inventor, when the conventional surface mount antenna 1 and the surface mount antenna 20 of the present invention are compared, the bandwidth is changed from 14.4 MHz to 15.3 MHz, and the XY plane gain (polarization plane) Is perpendicular to the XY plane, that is, the gain with respect to a radio wave whose electric field component vibrates in the Z-axis direction) is improved from -2.9 dBd to -2.7 dBd at the maximum, and from -4.7 dBd to -4.5 dBd on the average. did.
[0018]
In this way, a part of the radiation electrode 21 is formed along the edge of the end surface 2d of the base 2 and is formed so as to wrap around the other main surface 2b, thereby improving the gain of the surface mount antenna 20. Can do. Further, when it is not necessary to improve the gain, the surface-mounted antenna can be miniaturized by reducing the width of the substrate 2 or reducing the thickness accordingly.
[0019]
FIG. 4 shows another embodiment of the surface mount antenna of the present invention. 4, parts that are the same as or equivalent to those in FIG. 1 are given the same reference numerals, and descriptions thereof are omitted.
[0020]
4, the radiation electrode 31 is formed in a strip shape from the other main surface 2b of the base 2 to the other main surface 2b of the base 2 through the end surface 2d, and one end thereof forms an open end 31a. The other end is connected to the ground terminal 4. As in the surface-mounted antenna 20, the portion of the radiation electrode 31 formed on the end surface 2d of the base 2 is formed along the edge of the end surface 2d and is another adjacent surface. The other main surface 2b is formed to wrap around. Furthermore, two slits 31b are formed in a portion of the radiation electrode 31 formed around the other main surface 2b of the base 2 so as to be in contact with the edge of the other main surface 2b.
[0021]
Thus, even when the slit 31b is formed in a part of the radiation electrode 31 that extends from the end surface 2d to the other main surface 2b, the same operation and effect as those of the surface mount antenna 20 can be obtained. Can do. In addition, in this case, since no electrode is formed at the corner that is the boundary between the two surfaces 2b and 2d of the base 2, the electrode material sagging that occurs when the corner is printed by screen printing (the paste-like electrode material is the base). 2) from the other main surface 2b to the end surface 2d), and a decrease in yield due to poor appearance can be prevented.
[0022]
FIG. 5 shows still another embodiment of the surface mount antenna of the present invention. In FIG. 5, the surface-mounted antenna 40 is configured by forming several electrodes on the surface of a substantially rectangular parallelepiped base 41 made of a dielectric material such as ceramics or resin. The surface mount antenna 40 is formed as a sub-board obtained by dividing the collective board as described later.
[0023]
In FIG. 5, the radiation electrode 42 is formed in a strip shape from the other main surface 41b of the base body 41 to the other main surface 41b again through the inner surface of a substantially semi-oval recess 51a provided on the end surface 41d. Forms an open end 42a, and the other end is connected to a ground terminal 43 formed on the inner surface of a substantially semicircular recess 52a provided on the end surface 41c. And the part currently formed in the inner surface of the recessed part 51a among the radiation electrodes 42 is formed along the edge part of the recessed part 51a, and wraps around the other main surface 41b which is another adjacent surface. Has been. In addition, a power supply electrode 44 is formed on the other main surface 41b of the base body 41 corresponding to the open end 42a of the radiation electrode 42, and one end of the power supply electrode 44 is within a substantially semicircular recess 53a provided on the end surface 41c. It is connected to a power supply terminal 45 formed on the side surface. Similarly, a ground electrode 46 is formed on the other main surface 41b of the base body 41 in the vicinity of the open end 42a of the radiation electrode 42, and one end of the ground electrode 46 is an inner surface of a semicircular recess 54a provided on the end surface 41c. Are connected to a ground terminal 47 formed on the substrate. The electrode 48 is a dummy electrode formed on the inner surface of a semicircular recess 55a provided on the end face 41c. Here, each concave portion provided on the end surface of the base body 41 and the electrode formed on the inner surface thereof form a through hole in the boundary portion where the sub-boards are adjacent to each other in the collective substrate, and on the inner surface thereof. This is obtained by dividing the electrode on which the electrode is formed into a sub-board.
[0024]
Here, a method using a through hole will be described as one method for forming a recess in the end face of the substrate. FIG. 6 shows the collective substrate 50 before the surface-mounted antenna 40 is divided into the sub-boards, as viewed from the other main surface 41b side of the base body 41 of the sub-boards. In the collective substrate 50 of FIG. 6, a plurality of surface-mounted antennas 40 are connected in the state of a sub-board via a dividing line 56, and one oval type is formed at the boundary between adjacent sub-boards. Through-hole 51 and four through-holes 52, 53, 54, 55 are formed. Accordingly, the electrodes on the inner side surfaces of the through holes 51 to 55 are formed on the inner side surfaces of the substantially semi-oval or substantially semi-circular concave portions provided on the end surface of the base body 41 in a state of being divided into the sub-boards. It can be seen that a part of the electrode 42, the ground terminal 43, the power supply terminal 45, the ground terminal 47, and the dummy electrode 48 are obtained.
[0025]
As described above, when a part of the radiation electrode 42, the ground terminal 43, the power supply terminal 45, and the ground terminal 47 are formed on the end face of the base body 41 by the divided through holes, the same operation and effect as the surface-mounted antenna 20 of FIG. In addition, a large number of surface-mounted antennas can be obtained, and the cost can be reduced.
[0026]
In addition, the recessed part provided in the end surface of a base | substrate is not necessarily restricted to what divides | segments a through hole, The thing by another method may be used.
[0027]
Further, in each of the embodiments of the surface mount antenna described above, the base is made of a dielectric such as ceramics or resin which is one of the insulators, but may be made of a magnetic material which is also an insulator. Is. In each of the above embodiments, the electrode and the terminal are formed separately for the sake of explanation. However, they are not necessarily separated at some boundary, and the electrode and the terminal may be formed integrally. It doesn't matter.
[0028]
FIG. 7 shows an embodiment of a communication device equipped with the surface mount antenna of the present invention. In FIG. 7, the communication device 60 is provided with a mounting substrate 62 in a housing 61, and a ground electrode 63 and a power supply electrode 64 are formed on the mounting substrate 62. There is an area where the ground electrode 63 is not formed at the corner portion of the mounting substrate 62, and the surface-mounted antenna 20 of the present invention is mounted thereon. The ground terminal and the power supply terminal (not shown) of the surface mount antenna 20 are connected to the ground electrode 63 and the power supply electrode 64 of the mounting substrate 62, respectively. Further, the feeding electrode 64 is connected to a transmission circuit 66 and a reception circuit 67 that are also formed on the mounting substrate 62 via a switching circuit 65 that is formed on the mounting substrate 62.
[0029]
Thus, by mounting the surface-mounted antenna 20 of the present invention on the mounting substrate 62, antenna characteristics such as the gain and bandwidth of the communication device 60 can be improved. On the contrary, when the same antenna characteristics as the conventional one are sufficient, the surface-mounted antenna to be mounted can be made small, and thereby the communication device 60 can be downsized.
[0030]
In the embodiment of FIG. 7, the surface mount antenna 20 is mounted to configure the communication device 60. However, the surface mount antenna 30 or 40 shown in FIGS. 4 and 5 is mounted to configure the communication device. However, the same action and effect are produced.
[0031]
【The invention's effect】
According to the surface mount antenna of the present invention, the ground electrode is not formed on the mounting substrate having a region adjacent to the outside of the surface on which the ground electrode is formed and no ground electrode is formed. A surface-mounted antenna mounted near a surface on which the ground electrode is formed in a region, wherein a part of the radiation electrode is formed on an end surface side of a base, and the end surface is formed on the end surface side. Some of the radiation electrodes have a path width extending along both edges formed on the end face adjacent to the ridge line and the edge of the main surface wrapping around the ridge line along the ridge line on the upper end side of the end face. The path having a path width across both surfaces is the grounding of the mounting board on the side opposite to the end face side of the base on the side of the mounting board facing the ground electrode when the base is mounted on the mounting board. Structure formed on the end face side of the base on the side away from the electrode Since the, it is possible to improve the gain of a surface mount antenna.
[0032]
Furthermore, the antenna gain of the communication device can be improved or downsized by mounting the surface-mounted antenna of the present invention to configure the communication device.
[Brief description of the drawings]
FIG. 1 is a perspective view of an embodiment of a surface mount antenna according to the present invention.
FIG. 2 is a plan view showing a state in which the surface-mounted antenna of FIG. 1 is mounted on a mounting substrate.
FIG. 3 is a perspective view of a conventional surface mount antenna .
FIG. 4 is a perspective view of another embodiment of the surface mount antenna of the present invention.
FIG. 5 is a perspective view of still another embodiment of the surface mount antenna of the present invention.
6 is a diagram showing a collective substrate before the surface-mounted antenna of FIG. 5 is divided into sub-substrates.
FIG. 7 is a perspective view of an embodiment of a communication device according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 2 ... Base | substrate 2a ... One main surface 2b ... The other main surface 2c, 2d ... End surface 4, 8 ... Ground terminal 5 ... Feed electrode 6 ... Feed terminal 9, 10 ... Fixing terminal 20 ... Surface mount antenna 21 ... Radiation electrode 21a ... open end

Claims (3)

接地電極が形成されている面の外側に隣り合って接地電極が形成されていない領域を有している実装基板の、前記接地電極が形成されていない領域内の前記接地電極が形成されている面の近くに実装される表面実装型アンテナであって、一方主面、他方主面および複数の端面を有する絶縁体からなる基体と、該基体の表面に一端を開放端として形成されたストリップ状の放射電極と、該放射電極の他端に接続して形成されたグランド端子と、前記放射電極の開放端に対応して形成された給電電極と、該給電電極に接続して形成された給電端子とを有し、前記放射電極は、その一部が前記基体の端面側に形成され、この端面側に形成される前記一部の放射電極は当該端面の上端側の稜線に沿って、当該稜線に隣接する前記端面と該端面から回り込ませた主面の端縁とに形成された両面に跨った経路幅をもつ経路と成し、この両面に跨った経路幅をもつ経路は前記基体が実装基板に実装される際に実装基板の前記接地電極に対面する側の基体の端面側とは反対側の実装基板の接地電極から離れた側の基体の端面側に形成されることを特徴とする表面実装型アンテナ。The ground electrode in a region where the ground electrode is not formed on the mounting substrate having a region where the ground electrode is not formed adjacent to the outside of the surface where the ground electrode is formed is formed. A surface-mounted antenna mounted near a surface, comprising a base made of an insulator having one main surface, the other main surface and a plurality of end surfaces, and a strip shape formed on the surface of the base with one end as an open end A radiation terminal, a ground terminal connected to the other end of the radiation electrode, a power supply electrode formed corresponding to the open end of the radiation electrode, and a power supply formed connected to the power supply electrode A part of the radiation electrode is formed on the end face side of the base body, and the part of the radiation electrode formed on the end face side extends along a ridge line on the upper end side of the end face. around from the end face and the end face adjacent to the edge line Form a path with Mase major surfaces of the edge and the forming path width extending over both sides, the path having a path width across the both sides of the mounting substrate when the substrate is mounted on the mount board surface mount antenna that is formed on the end face of the far side of the substrate from the ground electrode, characterized in Rukoto opposite side of the mounting substrate from the end face side of the substrate on the side facing said ground electrode. 前記放射電極の一部、前記グランド端子、および前記給電端子は、前記基体の端面に設けた凹部に形成したことを特徴とする、請求項1に記載の表面実装型アンテナ。  2. The surface-mount antenna according to claim 1, wherein a part of the radiation electrode, the ground terminal, and the power supply terminal are formed in a recess provided on an end surface of the base. 請求項1または2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。  A communication device comprising the surface-mounted antenna according to claim 1.
JP04944398A 1998-03-02 1998-03-02 Surface mount antenna and communication device equipped with the same Expired - Fee Related JP3700377B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP04944398A JP3700377B2 (en) 1998-03-02 1998-03-02 Surface mount antenna and communication device equipped with the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP04944398A JP3700377B2 (en) 1998-03-02 1998-03-02 Surface mount antenna and communication device equipped with the same

Publications (2)

Publication Number Publication Date
JPH11251816A JPH11251816A (en) 1999-09-17
JP3700377B2 true JP3700377B2 (en) 2005-09-28

Family

ID=12831277

Family Applications (1)

Application Number Title Priority Date Filing Date
JP04944398A Expired - Fee Related JP3700377B2 (en) 1998-03-02 1998-03-02 Surface mount antenna and communication device equipped with the same

Country Status (1)

Country Link
JP (1) JP3700377B2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1146589B1 (en) 2000-04-14 2005-11-23 Hitachi Metals, Ltd. Chip antenna element and communication apparatus comprising the same
JP2002344232A (en) * 2001-04-17 2002-11-29 Samsung Electronics Co Ltd Planar antenna and its feeding structure
KR100548057B1 (en) * 2005-06-03 2006-02-01 (주)파트론 Surface Mount Antenna Device with Trio Land Structure
WO2008035526A1 (en) * 2006-09-20 2008-03-27 Murata Manufacturing Co., Ltd. Antenna structure and wireless communication device employing the same

Also Published As

Publication number Publication date
JPH11251816A (en) 1999-09-17

Similar Documents

Publication Publication Date Title
JP3562512B2 (en) Surface mounted antenna and communication device provided with the antenna
FI115085B (en) Surface mountable antenna type, antenna device, and communication device including antenna device
US6535167B2 (en) Laminate pattern antenna and wireless communication device equipped therewith
TWI628846B (en) Antenna structure and wireless communication device having the same
KR100414635B1 (en) Antenna system and radio unit using the same
EP0767510B1 (en) Surface mounting antenna and antenna apparatus
JP3649168B2 (en) RF circuit integrated antenna, antenna module using the same, and communication device including the same
JPWO2001024316A1 (en) Surface-mounted antenna and communication device equipped with the same
JP2004088249A (en) Antenna structure and communication device with the same
KR100548057B1 (en) Surface Mount Antenna Device with Trio Land Structure
JP2001522558A (en) Antenna for wireless communication device
JP3661432B2 (en) Surface mount antenna, antenna device using the same, and communication device using the same
JPH11239018A (en) Surface mounted antenna and communication equipment using it
JP3161340B2 (en) Surface mount antenna and antenna device
JP2004522347A (en) Antenna having base and conductor track structure
JPH08111609A (en) Antenna system
JP4645603B2 (en) Antenna structure and wireless communication apparatus including the same
JP3663888B2 (en) Surface mount antenna and communication device equipped with the same
JP3700377B2 (en) Surface mount antenna and communication device equipped with the same
KR20040093106A (en) Multiband microwave antenna
JP3286916B2 (en) Antenna device and communication device using the same
JPH07249927A (en) Surface mounted antenna
JP3042386B2 (en) Surface mount antenna and communication device using the same
JPH0993016A (en) Surface mounted antenna and communication equipment using the same
JP2003051705A (en) Surface mount antenna and communication equipment employing the same

Legal Events

Date Code Title Description
A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20041028

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20041124

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20050124

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20050315

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20050511

RD02 Notification of acceptance of power of attorney

Free format text: JAPANESE INTERMEDIATE CODE: A7422

Effective date: 20050511

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20050621

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20050704

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20080722

Year of fee payment: 3

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20090722

Year of fee payment: 4

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20090722

Year of fee payment: 4

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20100722

Year of fee payment: 5

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20100722

Year of fee payment: 5

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110722

Year of fee payment: 6

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110722

Year of fee payment: 6

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120722

Year of fee payment: 7

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130722

Year of fee payment: 8

LAPS Cancellation because of no payment of annual fees