JP2004229144A - Surface mounting antenna - Google Patents
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- JP2004229144A JP2004229144A JP2003016773A JP2003016773A JP2004229144A JP 2004229144 A JP2004229144 A JP 2004229144A JP 2003016773 A JP2003016773 A JP 2003016773A JP 2003016773 A JP2003016773 A JP 2003016773A JP 2004229144 A JP2004229144 A JP 2004229144A
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Abstract
Description
【0001】
【発明の属する技術分野】
本発明は、通常、JJYと呼ばれている標準電波を受信して時刻を修正するための表面実装アンテナに関するものであり、より詳細には、この表面実装アンテナをより小型化して省スペースを図るとともに、アンテナの指向性を改善し、かつ、より安価な表面実装アンテナを提供することを目的とした表面実装アンテナに関するものである。
【0002】
【従来の技術】
標準電波を受信して時刻を修正する電波時計は、最近では、腕時計や置時計等の時計ばかりでなく、内部で時刻を生成するクロックを有する各種の携帯機器、例えば、携帯電話やカーナビ、PDA(Personal Digital Assistant)等に内蔵されているクロックの時刻を自動的に修正して、常に正確な時刻を表示するために使用されるようになってきた。
【0003】
これらの携帯機器においては、より小型で持ち運びが容易な携帯機器とするとともに、携帯機器の姿勢によって受信する標準電波の感度が変動しないようにする必要がある。このため、標準電波を受信するために使用される表面実装アンテナとしては、小型化して省スペースを図るとともに、携帯機器の姿勢によって感度が変動しないようにアンテナの指向性を改善し、かつ、より安価な表面実装アンテナとすることが求められている。
【0004】
これらの携帯機器に使用される従来技術の表面実装アンテナは、図5に従来技術の標準電波を受信するための表面実装アンテナの1例を示す斜視図で示すように、棒状の表面実装アンテナ20を使用することが通常であって、コア21の両端にフランジ22及び23を有しており、このコア21の外周にコイル24が巻回されている構造をしているものであって、コア21の外周に巻回されたコイル24のリード24a、24bは、図示しない基板に形成された回路パターンに直接接続され、あるいはフランジ22又は23(図3では、フランジ23)に配置されたコイル接続用端子25a及び25bを介して、導線26a、26bによって基板に形成された回路パターンに接続されていた。
【0005】
この棒状の表面実装アンテナ20は、長軸に直交する方向からの電波に対しては高い感度を有しているが、電波の方向が傾斜するにしたがって感度が落ちて、長軸に平行な方向からの電波に対しては感度が極端に悪くなること、すなわち、アンテナとしての指向性が大きいことが知られている。このため、携帯機器の電波の方向に対する姿勢によって感度が大幅に変動しないように、棒状の表面実装アンテナ20を直交して2個配置することによって指向性を改善して、感度が極端に悪くなる姿勢が生じないようにすることが行われていた。
【0006】
【発明が解決しようとする課題】
本発明は、このような従来技術の問題点を解消して、標準電波を受信するために使用される表面実装アンテナを小型化して省スペースを図るとともに、携帯機器の姿勢によって感度が変動しないようにアンテナの指向性を改善し、かつ、実装工程を含めた全体として、より安価な表面実装アンテナを提供することを目的とするものである。
【0007】
【課題を解決するための手段】
本発明は、この従来技術の問題点を解決するために、回路基板に表面実装する表面実装アンテナにおいて、該表面実装アンテナが、中央に配置された基台と、該基台から放射状に突出して配置された複数個のコアと、該コアの先端に配置されたフランジと、前記コアの外周に巻回されたコイルとを有し、前記基台の表面に前記コイルを接続するコイル接続端子が配置されていることを特徴とする表面実装アンテナを提供するものである。
【0008】
ここで、前記基台と前記複数個のフランジとが同じ高さに形成されていることが望ましく、又は、前記基台の上面に前記コイルを接続するコイル接続用端子が配置されていることが望ましい。更に、前記コイル接続用端子が前記基台の上面に形成された凹部に配置され、前記コイルを相互に接続することが望ましい。或いは、前記基台の下面に、前記回路基板に形成された回路パターンと接続する接続用電極が配置され、前記フランジの下面に、前記回路基板に前記表面実装アンテナを固定する固定用電極が配置されていることが望ましい。
【0009】
【発明の実施の形態】
以下、本発明の詳細について、実施例を示す図面に基づいて説明する。図1は本発明の標準電波を受信するための表面実装アンテナの1実施例を示す斜視図であり、図2は図1に示す表面実装アンテナの断面図、図3(a)及び(b)は図1に示す表面実装アンテナの結線図、図4は本発明の標準電波を受信するための表面実装アンテナの他の実施例を示す平面図である。
【0010】
図1及び図2に示すように、本発明の標準電波を受信するための表面実装アンテナ1には、中央に基台2が配置されており、この基台2から放射状に形成された複数個(図示は4個)のコア3(図2参照)が突出して配置されている。そして、それぞれのコア3の先端には、基台2と同じ高さに形成されたフランジ4が配置されており、このコア3の外周には、コイル5a、5b、5c、5dが巻回されている。
【0011】
ここで、基台2と複数個のフランジ4とは必ずしも同じ高さにする必要はないが、同じ高さにすることによって、実装工程において表面実装アンテナ1を供給する際に、表面実装アンテナ1を安定して縦に積み上げることが可能となり、表面実装アンテナ1を回路基板(図示しない)に実装する実装工程において、供給装置から実装装置に容易に供給することができるので、実装工程が容易になり、実装工程を含めた全体としてより安価な表面実装アンテナを提供することができる。もし、基台2と複数個のフランジ4とを同じ高さとすることができないときには、複数個のフランジ4を同じ高さにして、基台2をやや低く形成すれば、同じ高さにしたときとほぼ同様の作用、効果を得ることができる。
【0012】
そして、基台2の上面に形成された凹部2aの表面には、コイル5a、5b、5c、5dのリード線6a、6b、6c、6dを相互に接続するコイル接続端子7a及び7bが配置されている。この実施例における表面実装アンテナ1は、図3(a)に示すコイル5の結線を行う場合を示したものであって、基台2に形成された凹部2aにおいて、コイル接続端子7aの上にコイル接続端子7bが直交して配置されており、コイル接続端子7aと7bとの間は絶縁されている。したがって、この接続のコイルは、独立した2個のコイルを直交して配置していることとなる。
【0013】
この直交して配置された2個のコイルは、互いに独立したコイルとなり、従来技術において棒状の表面実装アンテナ20を相互に直交して2個配置したものと同様の効果を得ることができるので、従来技術における2個の表面実装アンテナ20に代えて1個の表面実装アンテナ1を実装すれば足りるので、小型化して省スペースを図るとともに、アンテナの指向性を改善し、かつ、実装工程を含めた全体としてより安価な表面実装アンテナを提供することができる。
【0014】
一方、図3(b)に示すコイル5の結線では、四方にコイル5が突出した表面実装アンテナとなるので、1個の表面実装アンテナでありながら、どのような方向からの電波にも対応することが可能となり、アンテナの指向性が改善されて、携帯機器の姿勢によって感度が変動することの少ない表面実装アンテナとすることができるとともに、小型化して省スペースを図るとともに、実装工程を含めた全体としてより安価な表面実装アンテナを提供することができる。
【0015】
基台2の上面に形成された凹部2aに配置されたコイル接続端子7a及び7bは、図示されていないが、基台2の側面を経由して、図2に示すように、下面に形成された接続用電極8a及び8bにそれぞれ接続されている。この接続用電極8a、8bは、図示しない回路基板に形成された回路パターンと接続するための電極であって、回路基板に形成された回路パターン及びコンデンサ等の各種の部品と共働して受信回路を形成する。
【0016】
一方、フランジ4の下面には、図示しない回路基板に表面実装アンテナ1を固定する固定用電極9a、9bが配置されている。この固定用電極9a、9bは、回路基板に表面実装アンテナ1をハンダ付けして固定するためのダミー電極である。しかし、コイル5の他端を回路基板に形成された回路パターンと接続するときには、中央の基台2と同様に、コイル5のリード線の他端をフランジ4の上面に形成された凹部に配置されたコイル接続端子に接続し、フランジ4の側面を経由してコイル接続端子と下面の固定用電極9a、9bと接続することによって、コイル5のリード線の他端を回路基板に形成された回路パターンと接続することができる。
【0017】
図4は、本発明の他の実施例を示すものである。この実施例における表面実装アンテナ11は、中央の基台12から3個のコア13が放射状に突出して配置されたものであって、それぞれのコア13の先端に、基台12と同じ高さに形成されたフランジ14が配置されており、コア13の外周には、同様にコイル15が巻回されている。そして、基台12の上面に形成された凹部12aの表面には、コイル15のリード線16を相互に接続するコイル接続端子17が配置されている。そして、図4には示されていないが、表面実装アンテナ1と同様に、下面に接続用電極や固定用電極が配置されているが、重複するので、ここでは詳細な説明は省略する。
【0018】
この実施例の表面実装アンテナ11は、このように構成されているので、図3(b)に示すコイル5の結線を行った表面実装アンテナ1と全く同様の表面実装アンテナとして使用することができ、表面実装アンテナを小型化して省スペースを図るとともに、アンテナの指向性が改善されて、携帯機器の姿勢によって感度が変動することの少なく、かつ、小型化して省スペースを図るとともに、実装工程を含めた全体としてより安価な表面実装アンテナを提供することができる。
【0019】
以上、本発明の標準電波を受信するための表面実装アンテナについて説明したが、前述したように、本発明は、回路基板に表面実装する表面実装アンテナにおいて、表面実装アンテナが、中央に配置された基台と、基台から放射状に突出して配置された複数個のコアと、このコアの先端に配置されたフランジと、コアの外周に巻回されたコイルとを有し、基台の表面にコイルを接続するコイル接続端子が配置されていることを特徴とするものであって、実施例に述べた実施の形態に限定されるものではなく、本発明の要旨を逸脱しない範囲において各種の変更や改良を行うことができることは勿論である。
【0020】
【発明の効果】
本発明の表面実装アンテナは、以上に述べたように構成されているので、標準電波を受信するために使用される表面実装アンテナを小型化して省スペースを図るとともに、携帯機器の姿勢によって感度が変動しないようにアンテナの指向性を改善し、かつ、実装工程を含めた全体として、より安価な表面実装アンテナを提供することができる。
【図面の簡単な説明】
【図1】本発明の標準電波を受信するための表面実装アンテナの1実施例を示す斜視図である。
【図2】図1に示す表面実装アンテナの断面図である。
【図3】図1に示す表面実装アンテナの結線図である。
【図4】本発明の標準電波を受信するための表面実装アンテナの他の実施例を示す平面図である。
【図5】従来技術の標準電波を受信するための表面実装アンテナの1例を示す斜視図である。
【符号の説明】
1 表面実装アンテナ
2 基台
2a 凹部
3 コア
4 フランジ
5 コイル
6 リード線
7 コイル接続端子
8a,8b 接続用電極
9a,9b 固定用電極
11 表面実装アンテナ
12 基台
12a 凹部
13 コア
14 フランジ
15 コイル
16 リード線
17 コイル接続端子[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a surface mount antenna for receiving a standard radio wave called JJY and correcting the time, and more specifically, to reduce the size of the surface mount antenna to save space. In addition, the present invention relates to a surface-mounted antenna for improving the directivity of the antenna and providing a less expensive surface-mounted antenna.
[0002]
[Prior art]
Recently, a radio clock that receives a standard radio wave and corrects the time has recently been used not only for watches such as watches and clocks, but also for various portable devices having a clock for internally generating time, such as mobile phones, car navigation systems, and PDAs ( It has come to be used to automatically correct the time of a clock incorporated in a personal digital assistant (Personal Digital Assistant) or the like, and to always display an accurate time.
[0003]
In these portable devices, it is necessary to make the portable devices smaller and easier to carry, and to prevent the sensitivity of the received standard radio wave from fluctuating depending on the posture of the portable devices. For this reason, as a surface mount antenna used to receive standard radio waves, while miniaturizing and saving space, improving the directivity of the antenna so that the sensitivity does not fluctuate depending on the posture of the portable device, and There is a demand for an inexpensive surface mount antenna.
[0004]
The prior art surface mount antenna used in these portable devices is a rod-shaped
[0005]
The rod-shaped
[0006]
[Problems to be solved by the invention]
The present invention solves such a problem of the prior art, reduces the size of a surface-mounted antenna used to receive a standard radio wave, saves space, and prevents the sensitivity from being changed by the posture of a portable device. It is another object of the present invention to improve the directivity of the antenna and to provide a less expensive surface mount antenna as a whole including the mounting process.
[0007]
[Means for Solving the Problems]
In order to solve the problems of the prior art, the present invention provides a surface-mounted antenna that is surface-mounted on a circuit board, wherein the surface-mounted antenna has a base disposed in the center, and protrudes radially from the base. A plurality of cores arranged, a flange arranged at the tip of the core, and a coil wound around the outer periphery of the core, a coil connection terminal for connecting the coil to the surface of the base, It is intended to provide a surface-mounted antenna which is arranged.
[0008]
Here, it is desirable that the base and the plurality of flanges are formed at the same height, or that a coil connection terminal for connecting the coil is arranged on an upper surface of the base. desirable. Further, it is preferable that the coil connection terminal is disposed in a concave portion formed on the upper surface of the base, and the coils are connected to each other. Alternatively, a connection electrode for connecting to a circuit pattern formed on the circuit board is arranged on a lower surface of the base, and a fixing electrode for fixing the surface mount antenna to the circuit board is arranged on a lower surface of the flange. It is desirable to have been.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, details of the present invention will be described with reference to the drawings showing examples. FIG. 1 is a perspective view showing one embodiment of a surface mount antenna for receiving a standard radio wave according to the present invention. FIG. 2 is a sectional view of the surface mount antenna shown in FIG. 1, and FIGS. 3 (a) and 3 (b). FIG. 4 is a connection diagram of the surface mount antenna shown in FIG. 1, and FIG. 4 is a plan view showing another embodiment of the surface mount antenna for receiving a standard radio wave of the present invention.
[0010]
As shown in FIGS. 1 and 2, a surface mount antenna 1 for receiving a standard radio wave according to the present invention has a
[0011]
Here, the
[0012]
On the surface of the concave portion 2a formed on the upper surface of the
[0013]
The two orthogonally arranged coils are independent from each other, and can provide the same effect as that obtained by arranging two bar-shaped surface-mounted
[0014]
On the other hand, in the connection of the coil 5 shown in FIG. 3B, the coil 5 is a surface mounted antenna with the coil 5 protruding in all directions, so that it is possible to cope with radio waves from any direction even though it is a single surface mounted antenna. This makes it possible to improve the directivity of the antenna, to provide a surface-mounted antenna whose sensitivity does not fluctuate depending on the posture of the portable device, to reduce the size and save space, and to include the mounting process. A cheaper surface mount antenna as a whole can be provided.
[0015]
Although not shown, the
[0016]
On the other hand, on the lower surface of the
[0017]
FIG. 4 shows another embodiment of the present invention. The surface-mounted antenna 11 in this embodiment has three
[0018]
Since the surface-mount antenna 11 of this embodiment is configured as described above, it can be used as a surface-mount antenna 1 which is completely the same as the surface-mount antenna 1 in which the coil 5 shown in FIG. 3B is connected. In addition to miniaturizing the surface mount antenna to save space, the directivity of the antenna is improved, the sensitivity does not fluctuate depending on the posture of the portable device, and the size is reduced to save space, and the mounting process is reduced. It is possible to provide an inexpensive surface mount antenna as a whole including the antenna.
[0019]
As described above, the surface-mounted antenna for receiving the standard radio wave of the present invention has been described. However, as described above, in the present invention, in the surface-mounted antenna to be surface-mounted on the circuit board, the surface-mounted antenna is disposed at the center. A base, having a plurality of cores arranged radially protruding from the base, a flange arranged at the tip of the core, and a coil wound around the outer periphery of the core, the surface of the base A coil connection terminal for connecting a coil is provided, and is not limited to the embodiment described in the examples, and various changes may be made without departing from the gist of the present invention. Of course, improvements can be made.
[0020]
【The invention's effect】
Since the surface mount antenna of the present invention is configured as described above, the surface mount antenna used for receiving the standard radio wave is reduced in size to save space, and the sensitivity is increased depending on the posture of the portable device. It is possible to improve the directivity of the antenna so as not to fluctuate, and to provide a less expensive surface mount antenna as a whole including the mounting process.
[Brief description of the drawings]
FIG. 1 is a perspective view showing one embodiment of a surface mount antenna for receiving a standard radio wave according to the present invention.
FIG. 2 is a cross-sectional view of the surface mount antenna shown in FIG.
FIG. 3 is a connection diagram of the surface mount antenna shown in FIG. 1;
FIG. 4 is a plan view showing another embodiment of the surface mount antenna for receiving a standard radio wave according to the present invention.
FIG. 5 is a perspective view showing an example of a conventional surface mount antenna for receiving a standard radio wave.
[Explanation of symbols]
REFERENCE SIGNS LIST 1
Claims (5)
該表面実装アンテナが、中央に配置された基台と、該基台から放射状に突出して配置された複数個のコアと、該コアの先端に配置されたフランジと、前記コアの外周に巻回されたコイルとを有し、
前記基台の表面に前記コイルを接続するコイル接続端子が配置されていることを特徴とする表面実装アンテナ。In a surface mount antenna to be surface mounted on a circuit board,
The surface-mounted antenna includes a base disposed at the center, a plurality of cores radially protruding from the base, a flange disposed at a tip of the core, and a coil wound around the outer periphery of the core. With a coil,
A surface mounting antenna, wherein a coil connection terminal for connecting the coil is arranged on a surface of the base.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003016773A JP2004229144A (en) | 2003-01-24 | 2003-01-24 | Surface mounting antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003016773A JP2004229144A (en) | 2003-01-24 | 2003-01-24 | Surface mounting antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2004229144A true JP2004229144A (en) | 2004-08-12 |
Family
ID=32904114
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2003016773A Pending JP2004229144A (en) | 2003-01-24 | 2003-01-24 | Surface mounting antenna |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2004229144A (en) |
Cited By (74)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007043588A (en) * | 2005-08-05 | 2007-02-15 | Murata Mfg Co Ltd | Coil antenna |
| WO2007116797A1 (en) * | 2006-04-10 | 2007-10-18 | Sumida Corporation | Coil part |
| JP2008191124A (en) * | 2007-02-08 | 2008-08-21 | Casio Comput Co Ltd | Standard time radio wave transmission / re-radiation system, antenna circuit and re-radiation equipment |
| JP2009017593A (en) * | 2003-12-26 | 2009-01-22 | Toda Kogyo Corp | Magnetic field antenna, and wireless system and communication system configured using the same |
| US7710341B2 (en) * | 2006-03-13 | 2010-05-04 | Murata Manufacturing Co., Ltd. | Portable electronic device |
| WO2010071087A1 (en) | 2008-12-19 | 2010-06-24 | 日立金属株式会社 | Resonant receiving antenna and reception device |
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| US11588351B2 (en) | 2017-06-29 | 2023-02-21 | Witricity Corporation | Protection and control of wireless power systems |
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