JP2000323917A - Antenna system - Google Patents
Antenna systemInfo
- Publication number
- JP2000323917A JP2000323917A JP12580499A JP12580499A JP2000323917A JP 2000323917 A JP2000323917 A JP 2000323917A JP 12580499 A JP12580499 A JP 12580499A JP 12580499 A JP12580499 A JP 12580499A JP 2000323917 A JP2000323917 A JP 2000323917A
- Authority
- JP
- Japan
- Prior art keywords
- antenna device
- short
- conductor element
- ground plane
- radiation conductor
- 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.)
- Withdrawn
Links
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- Waveguide Aerials (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、主として移動体通
信等の無線機に使用されるアンテナ装置に関するもので
ある。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antenna device used mainly for radio equipment for mobile communication and the like.
【０００２】[0002]
【従来の技術】近年、携帯電話やページャなどの移動体
無線機が急速に普及している。平面型に構成されたアン
テナ装置は、移動体無線機内部に装荷可能なアンテナと
して、広く利用されている。図５は移動体無線機で利用
されているアンテナの代表例である板状逆Ｆアンテナの
斜視図である。2. Description of the Related Art In recent years, mobile radio devices such as mobile phones and pagers have rapidly become widespread. 2. Description of the Related Art An antenna device having a planar configuration is widely used as an antenna that can be loaded inside a mobile radio device. FIG. 5 is a perspective view of a plate-shaped inverted-F antenna which is a typical example of an antenna used in a mobile wireless device.
【０００３】図５に示す板状逆Ｆアンテナは、導体平板
で構成される放射導体素子２０により電波を送受信す
る。送受信する高周波信号の周波数は、放射導体素子２
０の周囲長でほぼ決定され、短絡端子２３と給電端子２
４との間隔を調整することによってインピーダンス整合
が行われる。なお、２１は放射導体素子２０に対向した
位置に配置される地板である。[0005] The plate-shaped inverted-F antenna shown in FIG. 5 transmits and receives radio waves by means of a radiating conductor element 20 composed of a conductor flat plate. The frequency of the high-frequency signal to be transmitted and received depends on the radiation conductor element 2
0, which is almost determined by the perimeter of the short-circuit terminal 23 and the feed terminal 2
The impedance matching is performed by adjusting the distance between the first and fourth electrodes. Reference numeral 21 denotes a ground plane disposed at a position facing the radiation conductor element 20.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、前記板
状逆Ｆアンテナは導体平板の周囲長によって周波数が決
定されるので、周波数が低くなると平板を大きくしなけ
ればならず、小型化が困難であった。またページャな
ど、外部へ情報を表示する表示部を必要とする移動体無
線機では、導体平板が表示部を形成する妨げになるとい
った問題点があった。However, since the frequency of the plate-shaped inverted-F antenna is determined by the perimeter of the conductor plate, when the frequency is lowered, the size of the plate must be increased, and it is difficult to reduce the size. Was. Further, in a mobile wireless device such as a pager which requires a display unit for displaying information to the outside, there is a problem that a conductive flat plate hinders formation of the display unit.
【０００５】そこで本発明は、従来に比べて小型で、か
つ表示部などを形成することができるアンテナ装置を提
供することを目的とする。Accordingly, an object of the present invention is to provide an antenna device which is smaller than conventional ones and can form a display section and the like.
【０００６】[0006]
【課題を解決するための手段】前記目的を達成するため
に、放射導体素子と地板の間にローディング素子を接続
してアンテナの実効的な周囲長を長くすることでアンテ
ナを小型化し、さらに放射導体素子や地板に開口部を設
けることで、表示部などを形成することが可能なアンテ
ナ装置を構成することができる。In order to achieve the above object, a loading element is connected between a radiating conductor element and a ground plane to increase the effective peripheral length of the antenna, thereby miniaturizing the antenna and further radiating the antenna. By providing an opening in the conductor element or the ground plane, an antenna device capable of forming a display portion or the like can be formed.
【０００７】[0007]
【発明の実施の形態】本発明の請求項１記載の発明は、
地板と、前記地板に対向するように設けられた放射導体
素子と、前記地板と前記放射導体素子を短絡する短絡端
子と、前記放射導体素子に高周波信号を供給するととも
に、前記短絡端子と異なる位置に配置された給電端子と
を有し、前記地板と前記放射導体素子とをローディング
素子を介して接続するとともに、前記放射導体素子と前
記地板の少なくとも一方に、少なくとも１つの開口部を
設けたアンテナ装置であり、ローディング素子によって
放射導体素子の実効的な周囲長を長くすることでアンテ
ナ装置を小型化するとともに、開口部を設けることで表
示部などを形成することが可能になる作用を有する。BEST MODE FOR CARRYING OUT THE INVENTION
A ground plane, a radiation conductor element provided to face the ground plane, a short-circuit terminal for short-circuiting the ground plane and the radiation conductor element, and a high-frequency signal supplied to the radiation conductor element and a position different from the short-circuit terminal. An antenna having a power supply terminal disposed on the ground plate, connecting the ground plane and the radiation conductor element via a loading element, and providing at least one opening in at least one of the radiation conductor element and the ground plane. The antenna device has a function of increasing the effective peripheral length of the radiation conductor element by the loading element, thereby reducing the size of the antenna device, and providing an opening to form a display unit or the like.
【０００８】本発明の請求項２記載の発明は、前記短絡
端子を板状に構成した請求項１記載のアンテナ装置であ
り、短絡端子を板状に構成することで放射導体を安定に
保持するとともに、板幅によって周波数を調整する作用
を有する。According to a second aspect of the present invention, there is provided the antenna device according to the first aspect, wherein the short-circuit terminal is formed in a plate shape, and the radiation conductor is stably held by forming the short-circuit terminal in a plate shape. In addition, it has the function of adjusting the frequency according to the plate width.
【０００９】本発明の請求項３記載の発明は、前記放射
導体素子と前記地板と前記短絡端子の少なくとも１つに
切欠部を設けた請求項１記載のアンテナ装置であり、切
欠部によって放射導体素子の実効的な周囲長を長くする
ことで、アンテナ装置を小型化する作用を有する。The invention according to claim 3 of the present invention is the antenna device according to claim 1, wherein a notch is provided in at least one of the radiation conductor element, the ground plane, and the short-circuit terminal. Increasing the effective peripheral length of the element has the effect of reducing the size of the antenna device.
【００１０】本発明の請求項４記載の発明は、前記ロー
ディング素子をチップコンデンサで構成した請求項１記
載のアンテナ装置であり、チップコンデンサによって放
射導体素子の実効的な周囲長を長くすることで、アンテ
ナ装置を小型化する作用を有する。According to a fourth aspect of the present invention, there is provided the antenna device according to the first aspect, wherein the loading element is constituted by a chip capacitor, wherein the effective peripheral length of the radiation conductor element is increased by the chip capacitor. Has the effect of reducing the size of the antenna device.
【００１１】本発明の請求項５記載の発明は、前記ロー
ディング素子を前記短絡端子から送受信周波数の０．０
０３〜０．０３波長の位置に配設した請求項１記載のア
ンテナ装置であり、アンテナ装置を小型化する作用を有
する。According to a fifth aspect of the present invention, the loading element is connected to the short-circuit terminal from the short-circuit terminal by a frequency of 0.0.
2. The antenna device according to claim 1, wherein the antenna device is disposed at a position of 03 to 0.03 wavelength, and has an operation of reducing the size of the antenna device.
【００１２】本発明の請求項６記載の発明は、前記チッ
プコンデンサを０．１〜１００ｐＦの大きさで構成した
請求項１記載のアンテナ装置であり、アンテナ装置を小
型化する作用を有する。The invention according to claim 6 of the present invention is the antenna device according to claim 1, wherein the chip capacitor has a size of 0.1 to 100 pF, and has an effect of reducing the size of the antenna device.
【００１３】本発明の請求項７記載の発明は、前記地板
と前記放射導体素子間に、スペーサを挿入した請求項１
記載のアンテナ装置であり、アンテナ装置を安定に保持
するとともに、内部に表示部などの装置を挿入可能にす
る作用を有する。According to a seventh aspect of the present invention, a spacer is inserted between the ground plane and the radiation conductor element.
The antenna device described above has a function of stably holding the antenna device and enabling insertion of a device such as a display unit inside.
【００１４】本発明の請求項８記載の発明は、前記スペ
ーサを誘電体で構成した請求項７記載のアンテナ装置で
あり、アンテナ装置を安定に保持するとともに、内部に
表示部などの装置を挿入可能にし、さらに誘電体の波長
短縮効果によってアンテナ装置を小型化する作用を有す
る。According to an eighth aspect of the present invention, there is provided the antenna device according to the seventh aspect, wherein the spacer is made of a dielectric material. The antenna device is stably held and a device such as a display unit is inserted therein. This has the effect of reducing the size of the antenna device by allowing the effect of shortening the wavelength of the dielectric.
【００１５】本発明の請求項９記載の発明は、前記給電
端子に少なくとも１つのリアクタンス素子からなる整合
回路を付加した請求項１記載のアンテナ装置であり、整
合回路によってアンテナ装置を小型化する作用を有す
る。According to a ninth aspect of the present invention, there is provided the antenna device according to the first aspect, wherein a matching circuit comprising at least one reactance element is added to the power supply terminal. Having.
【００１６】本発明の請求項１０記載の発明は、前記給
電端子を前記短絡端子から送受信周波数の０．００２〜
０．０１波長の位置に構成した請求項１記載のアンテナ
装置であり、アンテナ装置を小型化する作用を有する。According to a tenth aspect of the present invention, the power supply terminal is connected to the short-circuit terminal by a transmission / reception frequency of 0.002 to 0.002.
2. The antenna device according to claim 1, wherein the antenna device is configured at a position of 0.01 wavelength, and has an operation of reducing the size of the antenna device.
【００１７】本発明の請求項１１記載の発明は、前記給
電端子から離れた側の、前記短絡端子の側に前記開口部
に到達する前記切欠部を設けた請求項１記載のアンテナ
装置であり、アンテナ装置を小型化する作用を有する。The invention according to claim 11 of the present invention is the antenna device according to claim 1, wherein the notch reaching the opening is provided on the side of the short-circuit terminal that is remote from the power supply terminal. Has the effect of reducing the size of the antenna device.
【００１８】本発明の請求項１２記載の発明は、前記地
板と前記放射導体素子とで挟まれる角度を調整可能に構
成した請求項１記載のアンテナ装置であり、角度を調整
することで周波数を調整する作用を有する。According to a twelfth aspect of the present invention, there is provided the antenna apparatus according to the first aspect, wherein an angle sandwiched between the ground plane and the radiation conductor element is adjustable. It has the effect of adjusting.
【００１９】以下に本発明の各実施の形態について、図
を用いて説明する。Hereinafter, embodiments of the present invention will be described with reference to the drawings.
【００２０】（実施の形態１）図１は、本発明の実施の
形態１を示す斜視図である。１０はその中央部に開口部
１２が設けられた放射導体素子、１１は放射導体素子１
０に対向した位置に配置される地板、１３は放射導体素
子１０と地板１１を短絡する短絡端子、１４は放射導体
素子１０に高周波信号を供給する給電端子であり、その
一端が整合回路１９に接続されている（図示せず）。１
５は放射導体素子１０と地板１１の間に接続されるロー
ディング素子、１６は放射導体素子１０の実効的な周囲
長を調整する切欠部、１７は放射導体素子１０と電気的
に絶縁されるとともに、放射導体素子１０と地板１１と
の位置関係を安定に保持するスペーサであり、その表面
に文字情報などを表示するための表示部１８を形成する
ことで、開口部を通して外部からその内容を見ることが
できる。(Embodiment 1) FIG. 1 is a perspective view showing Embodiment 1 of the present invention. Reference numeral 10 denotes a radiating conductor element having an opening 12 at the center thereof, and 11 denotes a radiating conductor element 1
0, a short-circuit terminal for short-circuiting the radiation conductor element 10 and the ground plane 11, a feed terminal 14 for supplying a high-frequency signal to the radiation conductor element 10, one end of which is connected to the matching circuit 19. Connected (not shown). 1
5 is a loading element connected between the radiation conductor element 10 and the ground plane 11, 16 is a cutout for adjusting the effective circumference of the radiation conductor element 10, 17 is electrically insulated from the radiation conductor element 10 and Is a spacer for stably maintaining the positional relationship between the radiation conductor element 10 and the ground plane 11, and by forming a display section 18 for displaying character information or the like on the surface thereof, the contents can be viewed from the outside through the opening. be able to.
【００２１】ここで、放射導体素子１０の周囲長によっ
て送受信できる高周波信号の周波数は決定されるが、コ
ンデンサからなるローディング素子１５を放射導体素子
１０と地板１１との間に設けることにより、さらには放
射導体素子１０の一部に切欠部１６を設けることによっ
て、放射導体素子１０の実効的な周囲長が長くなり、送
受信可能な周波数を低くすることができる。その結果、
ある周波数において送受信を行う場合、通常の逆Ｆアン
テナに比べてアンテナを小型化することができる。な
お、本実施の形態では１つの切欠部１６を放射導体素子
１０の一部に設けたが、これに限定されるものではな
く、放射導体素子１０以外に地板１１や短絡端子１３に
切欠部を設けても、また複数の切欠部を設けても同様の
効果が得られる。さらに図２に示すように、切欠部１６
は開口部１２とつながっていても良い。Here, the frequency of the high-frequency signal that can be transmitted and received is determined by the peripheral length of the radiation conductor element 10. However, by providing the loading element 15 composed of a capacitor between the radiation conductor element 10 and the ground plane 11, By providing the notch 16 in a part of the radiation conductor element 10, the effective peripheral length of the radiation conductor element 10 becomes longer, and the frequency at which transmission and reception can be performed can be reduced. as a result,
When transmission / reception is performed at a certain frequency, the size of the antenna can be reduced as compared with a normal inverted F antenna. In the present embodiment, one notch 16 is provided in a part of the radiating conductor element 10, but the present invention is not limited to this, and a notch is formed in the ground plate 11 and the short-circuit terminal 13 in addition to the radiating conductor element 10. The same effect can be obtained even if it is provided or if a plurality of notches are provided. Further, as shown in FIG.
May be connected to the opening 12.
【００２２】また、スペーサ１７としては放射導体素子
１０に導体部が接触しなければどのようなものを用いて
も良いが、誘電体を用いると波長短縮効果により、さら
に小型化が可能となる。なお、本実施の形態では開口部
１２を放射導体素子１０に１つ設けたが、任意の形状、
数でまた放射導体素子１０、地板１１のどちらに設けて
も同様の効果が得られる。As the spacer 17, any material may be used as long as the conductor does not contact the radiating conductor element 10. However, if a dielectric is used, the size can be further reduced due to the wavelength shortening effect. Although one opening 12 is provided in the radiation conductor element 10 in the present embodiment, any shape,
The same effect can be obtained regardless of the number of the radiation conductor elements 10 and the ground plane 11.
【００２３】（実施の形態２）図３は、本発明の実施の
形態２を示す斜視図である。なお、実施の形態１と同様
の構成については、同一番号を付してその説明を省略す
る。本実施の形態では、切欠部１６を開口部１２までつ
ながるように設けられるとともに、スペーサ１７を放射
導体素子１０と地板１１の間の全体にわたって設けてい
る。(Embodiment 2) FIG. 3 is a perspective view showing Embodiment 2 of the present invention. Note that the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted. In the present embodiment, notch 16 is provided so as to connect to opening 12, and spacer 17 is provided entirely between radiation conductor element 10 and ground plate 11.
【００２４】ここで、短絡端子１３、給電端子１４、ロ
ーディング素子１５の位置関係は、給電端子１４が短絡
端子１３から遠ざかり、あるいは近づきすぎると所望の
周波数で整合が取れず、またローディング素子１５も短
絡端子１３から遠ざかり、あるいは近づきすぎると所望
の周波数で整合が取れず、所望の周波数で整合を取ろう
とすると、給電端子１４は短絡端子１３から０．００２
〜０．０１λの位置にする必要があり、またローディン
グ素子１５は短絡端子１３から０．００３〜０．０３λ
の位置にする必要がある。Here, the positional relationship between the short-circuit terminal 13, the power supply terminal 14, and the loading element 15 is such that if the power supply terminal 14 is too far from or short of the short-circuit terminal 13, matching cannot be achieved at a desired frequency. If the distance is too far or too short from the short-circuit terminal 13, the matching cannot be performed at the desired frequency.
And the loading element 15 is connected to the short-circuit terminal 13 by 0.003 to 0.03λ.
Need to be in the position.
【００２５】なお本実施の形態では、送受信の周波数を
２８０ＭＨｚとし、ローディング素子１５として４ｐＦ
のチップコンデンサを用いると、ローディング素子１５
は短絡端子１３からλ２＝（２５ｍｍ）の位置、給電端
子１４を短絡端子１３からλ１＝（７ｍｍ）の位置に構
成することで、所望の特性を得ることができる。なお、
本実施の形態では２８０ＭＨｚにおける構成を示した
が、本発明はこの周波数に限定されるものではなく、ロ
ーディング素子の大きさや位置、給電端子の位置、短絡
端子の位置も本実施の形態に限定されるものではない。In this embodiment, the transmitting and receiving frequency is 280 MHz, and the loading element 15 is 4 pF
When using the chip capacitor of FIG.
The desired characteristics can be obtained by configuring λ2 = (25 mm) from the short-circuit terminal 13 and λ1 = (7 mm) from the short-circuit terminal 13. In addition,
In this embodiment, the configuration at 280 MHz is shown, but the present invention is not limited to this frequency, and the size and position of the loading element, the position of the power supply terminal, and the position of the short-circuit terminal are also limited to this embodiment. Not something.
【００２６】（実施の形態３）図４は、本発明の実施の
形態３を示す断面図である。図に示す放射導体素子１０
と地板１１とで挟まれる角度θを調整することで、給電
端子１４とローディング素子１５の位置関係以外にもア
ンテナ装置の周波数を調整することが可能となる。θが
大きくなると送受信の周波数は下がり、θが小さくなる
と周波数は上がる。なお、この角度は本実施の形態に限
定されるものではなく、所望の周波数で所望の特性が得
られる角度で良い。(Embodiment 3) FIG. 4 is a sectional view showing Embodiment 3 of the present invention. Radiating conductor element 10 shown in FIG.
By adjusting the angle θ interposed between the power supply terminal 14 and the loading element 15, the frequency of the antenna device can be adjusted in addition to the positional relationship between the feed terminal 14 and the loading element 15. As θ increases, the transmission / reception frequency decreases, and as θ decreases, the frequency increases. Note that this angle is not limited to the present embodiment, and may be an angle at which a desired characteristic can be obtained at a desired frequency.
【００２７】[0027]
【発明の効果】以上のように、本発明によれば、平面ア
ンテナの放射導体素子と地板の間にローディング素子を
接続することで、アンテナを小型化することが可能とな
る。また、放射導体素子や地板に開口部を設けること
で、表示部を形成することが可能となる。As described above, according to the present invention, the antenna can be miniaturized by connecting the loading element between the radiation conductor element of the planar antenna and the ground plane. Further, by providing an opening in the radiation conductor element or the ground plane, a display section can be formed.
【図１】本発明の第１の実施の形態における斜視図FIG. 1 is a perspective view of a first embodiment of the present invention.
【図２】同実施の形態における放射導体素子の拡大図FIG. 2 is an enlarged view of a radiation conductor element in the embodiment.
【図３】本発明の第２の実施の形態における斜視図FIG. 3 is a perspective view according to a second embodiment of the present invention.
【図４】本発明の第３の実施の形態における断面図FIG. 4 is a sectional view according to a third embodiment of the present invention.
【図５】従来のアンテナ装置の板状逆Ｆアンテナの斜視
図FIG. 5 is a perspective view of a plate-shaped inverted-F antenna of a conventional antenna device.
１０ 放射導体素子 １１ 地板 １２ 開口部 １３ 短絡端子 １４ 給電端子 １５ ローディング素子 １６ 切欠部 １７ スペーサ １８ 表示部 DESCRIPTION OF SYMBOLS 10 Radiation conductor element 11 Ground plate 12 Opening 13 Short circuit terminal 14 Power supply terminal 15 Loading element 16 Notch 17 Spacer 18 Display part
───────────────────────────────────────────────────── フロントページの続き (72)発明者 佐藤 祐己 大阪府門真市大字門真1006番地 松下電器 産業株式会社内 Ｆターム(参考） 5J045 AB05 DA10 GA05 HA03 LA01 MA04 NA01 ──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Yuki Sato 1006 Kazuma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. F term (reference) 5J045 AB05 DA10 GA05 HA03 LA01 MA04 NA01
Claims (12)
られた放射導体素子と、前記地板と前記放射導体素子を
短絡する短絡端子と、前記放射導体素子に高周波信号を
供給するとともに、前記短絡端子と異なる位置に配置さ
れた給電端子とを有し、前記地板と前記放射導体素子と
をローディング素子を介して接続するとともに、前記放
射導体素子と前記地板の少なくとも一方に、少なくとも
１つの開口部を設けたアンテナ装置。1. A ground plane, a radiating conductor element provided so as to face the ground plane, a short-circuit terminal for short-circuiting the ground plane and the radiating conductor element, and supplying a high-frequency signal to the radiating conductor element, A feeding terminal arranged at a position different from the short-circuiting terminal, connecting the ground plane and the radiation conductor element via a loading element, and at least one opening in at least one of the radiation conductor element and the ground plane; An antenna device provided with a part.
記載のアンテナ装置。2. The short-circuit terminal according to claim 1, wherein said short-circuit terminal is formed in a plate shape.
The antenna device as described in the above.
端子の少なくとも１つに切欠部を設けた請求項１記載の
アンテナ装置。3. The antenna device according to claim 1, wherein a notch is provided in at least one of the radiation conductor element, the ground plane, and the short-circuit terminal.
サで構成した請求項１記載のアンテナ装置。4. The antenna device according to claim 1, wherein said loading element is constituted by a chip capacitor.
ら送受信周波数の０．００３〜０．０３波長の位置に配
設した請求項１記載のアンテナ装置。5. The antenna device according to claim 1, wherein the loading element is disposed at a position between 0.003 and 0.03 wavelengths of a transmission / reception frequency from the short-circuit terminal.
ｐＦの大きさで構成した請求項１記載のアンテナ装置。6. The method according to claim 1, wherein said chip capacitor is 0.1 to 100.
The antenna device according to claim 1, wherein the antenna device has a size of pF.
ーサを挿入した請求項１記載のアンテナ装置。7. The antenna device according to claim 1, wherein a spacer is inserted between the ground plane and the radiation conductor element.
７記載のアンテナ装置。8. The antenna device according to claim 7, wherein the spacer is made of a dielectric.
タンス素子からなる整合回路を付加した請求項１記載の
アンテナ装置。9. The antenna device according to claim 1, wherein a matching circuit including at least one reactance element is added to the power supply terminal.
信周波数の０．００２〜０．０１波長の位置に構成した
請求項１記載のアンテナ装置。10. The antenna device according to claim 1, wherein the power supply terminal is arranged at a position between 0.002 and 0.01 wavelengths of the transmission / reception frequency from the short-circuit terminal.
絡端子の側に前記開口部に到達する前記切欠部を設けた
請求項１記載のアンテナ装置。11. The antenna device according to claim 1, wherein the notch reaching the opening is provided on a side of the short-circuit terminal that is remote from the power supply terminal.
れる角度を調整可能に構成した請求項１記載のアンテナ
装置。12. The antenna device according to claim 1, wherein an angle between the ground plane and the radiation conductor element is adjustable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12580499A JP2000323917A (en) | 1999-05-06 | 1999-05-06 | Antenna system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12580499A JP2000323917A (en) | 1999-05-06 | 1999-05-06 | Antenna system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000323917A true JP2000323917A (en) | 2000-11-24 |
Family
ID=14919328
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12580499A Withdrawn JP2000323917A (en) | 1999-05-06 | 1999-05-06 | Antenna system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000323917A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003037416A (en) * | 2001-07-26 | 2003-02-07 | Toshiba Corp | Electronic equipment and antenna mounting method of the same |
| JP2003347835A (en) * | 2002-05-24 | 2003-12-05 | Murata Mfg Co Ltd | Antenna structure and communication device provided with the same |
| WO2008136587A1 (en) * | 2007-05-03 | 2008-11-13 | E.M.W. Antenna Co., Ltd. | Multi-band antenna and wireless communication device including the same |
-
1999
- 1999-05-06 JP JP12580499A patent/JP2000323917A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003037416A (en) * | 2001-07-26 | 2003-02-07 | Toshiba Corp | Electronic equipment and antenna mounting method of the same |
| JP2003347835A (en) * | 2002-05-24 | 2003-12-05 | Murata Mfg Co Ltd | Antenna structure and communication device provided with the same |
| WO2008136587A1 (en) * | 2007-05-03 | 2008-11-13 | E.M.W. Antenna Co., Ltd. | Multi-band antenna and wireless communication device including the same |
| KR100964652B1 (en) | 2007-05-03 | 2010-06-22 | 주식회사 이엠따블유 | Multi-band antenna and wireless communication device including the same |
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