JP4723123B2 - Sleeve antenna - Google Patents

Sleeve antenna Download PDF

Info

Publication number
JP4723123B2
JP4723123B2 JP2001187212A JP2001187212A JP4723123B2 JP 4723123 B2 JP4723123 B2 JP 4723123B2 JP 2001187212 A JP2001187212 A JP 2001187212A JP 2001187212 A JP2001187212 A JP 2001187212A JP 4723123 B2 JP4723123 B2 JP 4723123B2
Authority
JP
Japan
Prior art keywords
antenna
support
conductor
sleeve
coaxial
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
JP2001187212A
Other languages
Japanese (ja)
Other versions
JP2003008333A (en
Inventor
誠一 本間
裕二 大島
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.)
Maspro Denkoh Corp
Original Assignee
Maspro Denkoh Corp
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 Maspro Denkoh Corp filed Critical Maspro Denkoh Corp
Priority to JP2001187212A priority Critical patent/JP4723123B2/en
Publication of JP2003008333A publication Critical patent/JP2003008333A/en
Application granted granted Critical
Publication of JP4723123B2 publication Critical patent/JP4723123B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Landscapes

  • Aerials With Secondary Devices (AREA)
  • Variable-Direction Aerials And Aerial Arrays (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、スリーブアンテナに関する。
【０００２】
【従来の技術】
従来、スリーブアンテナにおいては、同軸給電線をスリーブアンテナに対して真下に垂らして特性を維持していたが、例えば無線ＬＡＮに使用するような場合には、スリーブアンテナを平面に置いたり壁面に取付けて使用するため、アンテナ部が支持装置に対して傾動出来る必要が有る。
また、スリーブアンテナにおいては、デザイン的な面から、同軸給電線を支持装置の内部に配線する必要が生じてきたが、デザインによっては、同軸給電線の配置や、アンテナ部を傾動した時の状態により、アンテナの特性が劣化するような構成となっていた。
【０００３】
【発明が解決しようとする課題】
このように、従来のスリーブアンテナにおいては、同軸給電線の配置や、アンテナ部を傾動した時の状態により、アンテナの特性が安定するような構成とはなっていなかった。
本発明は、こうした問題点に鑑みなされたものであり、同軸給電線の配置や、アンテナ部の傾動による特性の劣化をなくすことのできるスリーブアンテナを提供することを目的とする。
【０００４】
【課題を解決するための手段】
かかる目的を達成するためになされた請求項１に記載の発明は、
同軸給電線先端の中心導体を、使用周波数の概１／４波長の長さ分だけ外皮導体から突出させることにより形成された放射素子と、
使用周波数の概１／４波長の長さを有し、一端が前記同軸給電線の前記放射素子側の外皮導体先端部に接続されて、前記同軸給電線の周囲に配置される分岐導体と、
により構成されるアンテナ部を備えたスリーブアンテナにおいて、
前記アンテナ部の前記放射素子とは反対側から引き出されて前記アンテナ部への給電を行うのに用いられる同軸給電線を、前記使用周波数の概１／２波長の長さ分だけ折り返すことにより、折り返し部を形成し、該折り返し部の折り返し開始部と折り返し終了部とで、当該同軸給電線の外皮を近接させたことを特徴とする。
【０００５】
請求項２に記載の発明は、請求項１に記載のスリーブアンテナにおいて、
前記放射素子を構成する前記同軸給電線の中心導体は、誘電体により保護されていることを特徴とする。
【０００６】
請求項３に記載の発明は、請求項１又は請求項２に記載のスリーブアンテナにおいて、
前記アンテナ部を傾動自在に支持する支持部と、平面や壁面に取付可能な支持台とで構成された支持装置、を備えたことを特徴とする。
【０００７】
請求項４に記載の発明は、請求項３に記載のスリーブアンテナにおいて、
前記支持装置の支持部又は支持台には、前記折り返し部を収納する空間が設けられ、
前記支持装置の支持台には、概略支持台の大きさとなるよう構成された反射板が収納されていることを特徴とする。
【０００８】
請求項５に記載の発明は、請求項３又は請求項４に記載のスリーブアンテナにおいて、
前記支持装置は、前記支持部に対し前記アンテナ部を前記支持台と平行になるよう傾動させた際、前記支持台が、前記アンテナ部の支持部側よりも先端側へより大きく突出されて、前記アンテナ部と対向するよう構成されていることを特徴とする。
【０００９】
【発明の実施の形態】
以下に、本発明の実施形態を、図面を用いて説明する。
図１は本発明が適用された実施形態のスリーブアンテナの構成を表すＢ−Ｂ詳細断面図（Ｂ−Ｂは図３参照）、図２は図１のスリーブアンテナから化粧ケースをはずしたアンテナ部の状態を表す説明図、図３はアンテナ部の詳細構成を表すＡ−Ａ詳細断面図（Ａ−Ａは図２参照）、図４は実施形態のスリーブアンテナの外観を表す斜視図、図５は壁面取付時のスリーブアンテナの外観を表す斜視図、図６は壁面取付時のスリーブアンテナの側面を表す側面図、である。
【００１０】
図１〜図３に示すように、本実施形態のスリーブアンテナは、アンテナ部２５（図５、図６参照）として、同軸給電線１の先端から概１／４波長の長さで、当該同軸給電線１の外皮１６と外皮導体２９を取り除くことにより、中心導体２と当該中心導体２を取りまく誘電体３とで形成された放射素子４と、同軸給電線１の外皮導体２９の先端部に固定された分岐導体５とを備える。
分岐導体５は、同軸給電線１と平行に、同軸給電線１を対称軸として対向配置した２組の導電性板体６から成り、双方は互いに直交配置されて上部で互いに連結され連結部７を構成している。導電性板体６は使用周波数の概１／４波長の長さで形成され、連結部７は中央に挿通孔を持つ。
【００１１】
本実施形態の分岐導体５の組付け手順を詳細に説明する。
まず、同軸給電線１にフェルール８を挿通させる。同軸給電線１にはまた金属製の連結部材９を固定する。
連結部材９には、分岐導体５の連結部７を載置する円盤状台座１０が設けられており、その中央部には略円柱状の突起１１が形成され、突起１１には止め具であるＥリング１２を装着する溝が形成されている。そして、中央に放射素子４を挿通する挿通孔１３が形成され、連結部材９の下面には放射素子４を挿通して給電線端部に挿入する挿入筒１４が形成されている。
当該連結部材９の挿入孔１３に放射素子４を挿通し、当該連結部材９を上記外皮導体２９の先端と当接させるよう挿入筒１４を同軸給電線１の外皮導体１９と誘電体３との間に挿入し、挿入後は上記挿入筒１４上に上記フェルール８を配置して連結部材９をかしめ固定する。
上述の分岐導体５は、上記のように固定された連結部材９に連結部７を載置し、連結部材９の台座１０の上部の溝にＥリング１２を装着することで固定され、電気的にも外皮導体２９と接続される。
【００１２】
次に、同軸給電線１の折り返し部について説明する。
アンテナ部２５は樹脂等でできた化粧ケース１５に収められている。また、アンテナ部２５は傾動自在になるよう支持装置１７に枢着されている。支持装置１７は、支持部１８と、平面や壁面に取付可能な支持台１９で構成されており、アンテナ部２５から引き出された同軸給電線１を配線する空間２２を持つ。
支持装置１７に配線された同軸給電線１は、概略１／２波長の長さを折り返し、折り返し開始部２０と折り返し終了部２１とを近接させた折り返し部２３を持ち、支持部１８の空間２２に保持される。残りの同軸給電線１は、支持装置１７の支持部１８、支持台１９を通って、支持台１９の下面に設けられた略Ｕ字型の溝２３に保持されて出力される。
同軸給電線１は、急激に曲げると、電圧定在波比や減衰量の周波数特性が劣化する。これを防止するため、本実施形態では、折り返し部２３を配線する空間は支持装置１７の支持部１８に設けられている。
尚、支持台１９に折り返し部２３を配線する空間を設けても良いが、スリーブアンテナの小型化を考慮すると、同軸給電線１の急激な曲げが必要となる化粧ケース１５に折り返し部２３を設けることはできない。
【００１３】
スリーブアンテナは、上記分岐導体６の長さを概ね１／４波長とすることで、当該分岐導体６と同軸給電線１の外皮導体２９の外側とで形成する回路のインピーダンスが無限大となることを利用して、外被導体２９の外側に流れる電流を阻止させる作用を持つように構成される。
そして、本実施形態では、同軸給電線１に上記折り返し部２３を設けることで、同軸給電線１への漏洩電流をより効果的に阻止し、同軸給電線１の配置による特性の劣化を抑えている。
【００１４】
また、支持装置１７の支持台１９には、概略支持台１９の大きさとなるよう構成された、鋼板でできた反射板２４を収納している。反射板２４は支持台１９を安定して設置するための重りの役割だけで無く、アンテナ部２５を壁面に設置した時のアンテナ反射器として機能するよう構成されている。
そして、支持装置１７は、アンテナ部２５を支持台１９と平行となるように傾動させた際、支持台１９が、アンテナ部２５の支持部１８側よりもアンテナ部２５の先端側により大きく突出して、アンテナ部２５と対向するようにされている（図５、図６参照）。
【００１５】
尚、本発明は上記実施の形態に限定されるものではなく、本発明の趣旨を逸脱しない範囲で各部の配置や形状を適宜に変更して実施することも可能である。
【００１６】
【発明の効果】
以上詳述したように、請求項１に記載のスリーブアンテナによれば、アンテナ部の放射素子とは反対側から引き出された給電用の同軸給電線を、使用周波数の概１／２波長の長さ分だけ折り返すことにより、折り返し部を形成し、該折り返し部の折り返し開始部と折り返し終了部とで同軸給電線の外皮を近接させていることから、漏洩電流をより効果的に阻止し、同軸給電線の配置による特性の劣化を抑えることができる。
【００１７】
また、請求項２に記載のスリーブアンテナによれば、放射素子を構成する同軸給電線の中心導体が、誘電体により保護されているので、中心導体の変形を防止できる。
【００１８】
また、請求項３に記載のスリーブアンテナによれば、アンテナ部を傾動自在に支持する支持部と、平面や壁面に取付可能な支持台とで構成された支持装置を有することから、平面や壁面にも設置可能となる。
【００１９】
また、請求項４に記載のスリーブアンテナによれば、支持装置の支持部又は支持台には、同軸給電線の折り返し部を収納する空間が設けられ、支持装置の支持台には、概略支持台の大きさとなるよう構成された反射板が収納されている。また、請求項５に記載のスリーブアンテナによれば、支持部に対しアンテナ部を支持台と平行になるよう傾動させた際、支持台が、アンテナ部の支持部側よりも先端側へより大きく突出されて、アンテナ部と対向するように構成されている。
このため、請求項４、５に記載のスリーブアンテナによれば、スリーブアンテナを壁面に取付けたときに支持台を反射板として機能させ、特性を向上させることができる。
【図面の簡単な説明】
【図１】実施形態のスリーブアンテナの構成を表すＢ−Ｂ詳細断面図（Ｂ−Ｂは図３参照）である。
【図２】化粧ケースをはずしたアンテナ部の状態を表す説明図である。
【図３】アンテナ部の詳細構成を表すＡ−Ａ断面図（Ａ−Ａは図２参照）である。
【図４】実施形態のスリーブアンテナの外観を表す斜視図である。
【図５】壁面取付時のスリーブアンテナの外観を表す斜視図である。
【図６】壁面取付時のスリーブアンテナの側面を表す側面図である。
【符号の説明】
１…同軸給電線、２…中心導体、３…誘電体、４…放射素子、５…分岐導体、６…導電性板体、７…取付部、８…フェルール、９…連結部材、１０…台座、１１…突起、１２…Ｅリング、１３…挿通孔、１４…挿通筒、１５…化粧ケース、１６…外皮、１７…支持装置、１８…支持部、１９…支持台、２０…折り返し開始部、２１…折り返し終了部、２２…空間、２３…折り返し部、２４…反射板、２５…アンテナ部、２６…壁面、２７…壁面取付ビス、２８…壁面取付孔、２９…外皮導体。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sleeve antenna.
[0002]
[Prior art]
Conventionally, in a sleeve antenna, the characteristic was maintained by dropping the coaxial feed line directly below the sleeve antenna. However, for example, when used in a wireless LAN , the sleeve antenna is placed on a flat surface or attached to a wall surface. for use Te, tilting necessary can Ru closed with respect to the antenna portion supporting device.
In the sleeve antenna, the design of view, but necessary to the wiring inside the support device coaxial feed line has arisen, by design, the coaxial feed line arrangement and, when tilted antenna portion The antenna characteristics are degraded depending on the state.
[0003]
[Problems to be solved by the invention]
As this, in the conventional sleeve antenna, arrangement of the coaxial feeder, the state when tilting the antenna section, characteristics of the antenna has not been a like stable structure.
The present invention has been made in view of such problems, and an object of the present invention is to provide a sleeve antenna that can eliminate the deterioration of characteristics due to the arrangement of the coaxial feeder and the tilt of the antenna portion .
[0004]
[Means for Solving the Problems]
The invention according to claim 1, which has been made to achieve the object,
A radiating element formed by projecting the central conductor at the tip of the coaxial feed line from the outer conductor by a length corresponding to approximately ¼ wavelength of the operating frequency ;
A branch conductor having a length of approximately ¼ wavelength of the operating frequency and having one end connected to the outer end of the coaxial conductor on the radiation element side of the outer conductor and disposed around the coaxial feeder ;
In the sleeve antenna provided with the antenna portion configured by :
By folding back the coaxial feed line that is drawn from the opposite side of the radiating element of the antenna unit and used to feed the antenna unit by the length of approximately ½ wavelength of the used frequency , the folded portion is formed at the folded starting portion and the folded end of a said folded portion, characterized in that to close the outer skin of the coaxial feeder.
[0005]
The invention according to claim 2 is the sleeve antenna according to claim 1,
It said center conductor of said coaxial feed line constituting the radiating element, characterized in that it is protected by a dielectric.
[0006]
The invention according to claim 3 is the sleeve antenna according to claim 1 or 2,
And a support device configured to support the antenna unit in a tiltable manner and a support base that can be attached to a flat surface or a wall surface .
[0007]
The invention according to claim 4 is the sleeve antenna according to claim 3,
Wherein the support or the support base of the support device, the space for accommodating the folded portion is provided et al is,
Wherein the support base of the support device is characterized in that anti-radiation plate that is configured to be of general support table size is accommodated.
[0008]
The invention according to claim 5 is the sleeve antenna according to claim 3 or 4,
The support device, when the antenna unit with respect to the support portion is tilted so as to be parallel to the support base, the support base is, protrudes greater the support part side tip side than the antenna portion The antenna unit is configured to face the antenna unit .
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
1 is a detailed cross-sectional view taken along the line B-B showing the configuration of the sleeve antenna according to the embodiment to which the present invention is applied (see FIG. 3 for B-B), and FIG. 2 is an antenna part with the decorative case removed from the sleeve antenna of FIG. schematic diagram of the state, (see FIG. 2 a-a is) 3 a-a detailed cross-sectional view illustrating a specific configuration of the antenna unit, perspective view FIG. 4 illustrating an appearance of a sleeve antenna in the embodiment, FIG. 5 FIG. 6 is a perspective view showing the appearance of the sleeve antenna when the wall surface is attached, and FIG. 6 is a side view showing the side surface of the sleeve antenna when the wall surface is attached.
[0010]
As shown in FIG. 1 to FIG. 3, the sleeve antenna of this embodiment is an antenna portion 25 (see FIG. 5 and FIG. 6) having a length of about ¼ wavelength from the tip of the coaxial feeder 1, by dividing Kukoto takes outer skin 16 and outer covering conductor 29 of the feed line 1, the center conductor 2 and the radiating element 4 formed in the dielectric 3 surrounding the center conductors 2, the coaxial feed line 1 of the outer covering conductor 29 And a branch conductor 5 fixed to the tip .
Branch conductor 5 in parallel to the coaxial feeder 1 comprises a coaxial feeder 1 from two sets of conductive plate member 6 disposed facing the axis of symmetry, both sides are connected to each other at the top is arranged perpendicular to one another coupling part 7 Is configured. The conductive plate 6 is formed with a length of approximately ¼ wavelength of the operating frequency, and the connecting portion 7 has an insertion hole in the center.
[0011]
The procedure for assembling the branch conductor 5 of this embodiment will be described in detail.
First, the ferrule 8 is inserted through the coaxial feeder 1. A metal connecting member 9 is also fixed to the coaxial feeder 1 .
The connecting member 9 is provided with a disk-like pedestal 10 on which the connecting portion 7 of the branch conductor 5 is placed. A substantially cylindrical protrusion 11 is formed at the center of the connecting member 9, and the protrusion 11 is a stopper. A groove for mounting the E-ring 12 is formed. An insertion hole 13 through which the radiating element 4 is inserted is formed at the center, and an insertion cylinder 14 is formed on the lower surface of the connecting member 9 to insert the radiating element 4 and insert it into the end of the feeder line.
The radiating element 4 is inserted into the insertion hole 13 of the connecting member 9, and the connecting member 9 and the outer covering conductor 19 of the coaxial feed line 1 the insertion tube 14 so as to abut the tip of the outer covering conductor 29 dielectric 3 After the insertion, the ferrule 8 is arranged on the insertion tube 14 and the connecting member 9 is caulked and fixed.
Branch conductor 5 described above, by placing the connecting portion 7 to the connecting member 9 fixed as described above, it is fixed by mounting the E ring 12 to the top of the groove of the base 10 of the connecting member 9, the electrical Also, it is connected to the outer conductor 29.
[0012]
It will now be described folding-back portion of the coaxial feed line 1.
The antenna unit 25 is housed in a decorative case 15 made of resin or the like. The antenna unit 25 is pivotally attached to the support device 17 so as to be tiltable . The support device 17 includes a support portion 18 and a support base 19 that can be attached to a flat surface or a wall surface. The support device 17 has a space 22 for wiring the coaxial feeder 1 drawn out from the antenna portion 25.
Coaxial feed line 1 which is wired to the support device 17, the folded length of the outline half wavelength has a folded portion 23 which is close to an end portion 21 folded back and the folded starting portion 20, the space of the support 18 22 is held. The remaining coaxial feed line 1 passes through the support portion 18 and the support base 19 of the support device 17 , and is held and output in a substantially U-shaped groove 23 provided on the lower surface of the support base 19 .
If the coaxial feeder 1 is bent rapidly, the frequency characteristics of the voltage standing wave ratio and the attenuation amount deteriorate. In order to prevent this, in the present embodiment , a space for wiring the folded portion 23 is provided in the support portion 18 of the support device 17.
Although a space for wiring the folded portion 23 may be provided on the support base 19, the folded portion 23 is provided on the decorative case 15 that requires rapid bending of the coaxial feeder 1 in consideration of downsizing of the sleeve antenna. It is not possible.
[0013]
Sri Buantena, by roughly a quarter wavelength length of the branch conductor 6, the impedance of the circuit formed by the outside of the branch conductor 6 and the coaxial feeder 1 of outer covering conductor 29 becomes infinite utilizing, it is configured to have a function to prevent the current flowing to the outside of the envelope conductor 29.
In the present embodiment, by the coaxial feeder 1 providing the folded portion 23, the leakage current to the coaxial feeder 1 more effectively prevented, while suppressing the deterioration in characteristics due to the arrangement of the coaxial feed line 1 Yes.
[0014]
In addition, the support base 19 of the support device 17 accommodates a reflector 24 made of a steel plate and configured to be approximately the size of the support base 19 . The reflector 24 is configured to function as an antenna reflector when the antenna unit 25 is installed on the wall surface, as well as a weight for stably installing the support base 19 .
When the support device 17 tilts the antenna unit 25 so as to be parallel to the support base 19 , the support base 19 protrudes more greatly toward the distal end side of the antenna unit 25 than to the support unit 18 side of the antenna unit 25. The antenna unit 25 is opposed to the antenna unit 25 (see FIGS. 5 and 6).
[0015]
The present invention is not limited to the above-described embodiment, and the arrangement and shape of each part can be changed as appropriate without departing from the spirit of the present invention.
[0016]
【The invention's effect】
As described above in detail , according to the sleeve antenna of the first aspect, the coaxial feeding line for feeding drawn from the side opposite to the radiating element of the antenna portion is set to a length of about ½ wavelength of the operating frequency. by folding only of fraction, to form a folded portion, since it is in close proximity to the outer skin of the coaxial feeder at the folded starting portion and the folded end of a said folded portion, and effectively prevent the leakage current, It is possible to suppress the deterioration of characteristics due to the arrangement of the coaxial feeder.
[0017]
Further, according to the sleeve antenna according to claim 2, the center conductor of the coaxial feeder constituting the radiating elements, than are protected by a dielectric, it is possible to prevent the deformation of the center conductor.
[0018]
According to the sleeve antenna of the third aspect, since the support device is configured by the support portion that tiltably supports the antenna portion and the support base that can be attached to the flat surface or the wall surface, Can also be installed.
[0019]
Further, according to the sleeve antenna according to claim 4, the support or support base of the support device, space is provided we are for accommodating the folded portion of the coaxial feeder, the supporting base of the supporting device is a schematic support anti radiation plate configured so that the size of the base is housed. According to the sleeve antenna of the fifth aspect, when the antenna unit is tilted with respect to the support unit so as to be parallel to the support table, the support table is larger toward the tip side than the support unit side of the antenna unit. It protrudes and is configured to face the antenna portion .
Therefore, according to the sleeve antenna according to claim 4 and 5, the support base to come and fitted with a sleeve antenna in the wall to function as a reflector, it is possible to improve the characteristics.
[Brief description of the drawings]
FIG. 1 is a BB detailed cross-sectional view (see FIG. 3 for BB) showing a configuration of a sleeve antenna of the embodiment .
FIG. 2 is an explanatory diagram showing a state of the antenna unit with the decorative case removed .
FIG. 3 is a cross-sectional view taken along the line AA showing the detailed configuration of the antenna unit (see FIG. 2 for AA) .
FIG. 4 is a perspective view illustrating an appearance of a sleeve antenna according to the embodiment .
FIG. 5 is a perspective view illustrating an appearance of a sleeve antenna when mounted on a wall surface .
FIG. 6 is a side view showing a side surface of the sleeve antenna when the wall surface is attached .
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Coaxial feeder, 2 ... Center conductor, 3 ... Dielectric material, 4 ... Radiation element , 5 ... Branching conductor, 6 ... Conductive board, 7 ... Mounting part, 8 ... Ferrule, 9 ... Connecting member, 10 ... Base 11 ... Projection, 12 ... E-ring, 13 ... Insertion hole, 14 ... Insertion tube, 15 ... Cosmetic case, 16 ... Outer skin, 17 ... Supporting device, 18 ... Supporting part, 19 ... Supporting base, 20 ... Folding start part, DESCRIPTION OF SYMBOLS 21 ... Folding end part, 22 ... Space, 23 ... Folding part, 24 ... Reflector, 25 ... Antenna part , 26 ... Wall surface, 27 ... Wall surface mounting screw, 28 ... Wall surface mounting hole, 29 ... Outer conductor

Claims (5)

同軸給電線先端の中心導体を、使用周波数の概１／４波長の長さ分だけ外皮導体から突出させることにより形成された放射素子と、
使用周波数の概１／４波長の長さを有し、一端が前記同軸給電線の前記放射素子側の外皮導体先端部に接続されて、前記同軸給電線の周囲に配置される分岐導体と、
により構成されるアンテナ部を備えたスリーブアンテナにおいて、
前記アンテナ部の前記放射素子とは反対側から引き出されて前記アンテナ部への給電を行うのに用いられる同軸給電線を、前記使用周波数の概１／２波長の長さ分だけ折り返すことにより、折り返し部を形成し、該折り返し部の折り返し開始部と折り返し終了部とで、当該同軸給電線の外皮を近接させたことを特徴とするスリーブアンテナ。 A radiating element formed by projecting the central conductor at the tip of the coaxial feed line from the outer conductor by a length corresponding to approximately ¼ wavelength of the operating frequency ;
A branch conductor having a length of approximately ¼ wavelength of the operating frequency and having one end connected to the outer end of the coaxial conductor on the radiation element side of the outer conductor and disposed around the coaxial feeder ;
In the sleeve antenna provided with the antenna portion configured by :
By folding back the coaxial feed line that is drawn from the opposite side of the radiating element of the antenna unit and used to feed the antenna unit by the length of approximately ½ wavelength of the used frequency , the folded portion is formed, it said at the folded starting portion and the folded end of a folded portion, sleeve antenna, characterized in that to close the outer skin of the coaxial feeder. 前記放射素子を構成する前記同軸給電線の中心導体は、誘電体により保護されていることを特徴とする請求項１に記載のスリーブアンテナ。 The center conductor of the coaxial feed line, sleeve antenna according to claim 1, characterized in that it is protected by a dielectric constituting the radiating element. 前記アンテナ部を傾動自在に支持する支持部と、平面や壁面に取付可能な支持台とで構成された支持装置、
を備えたことを特徴とする請求項１又は請求項２に記載のスリーブアンテナ。 A support device composed of a support part that tiltably supports the antenna part, and a support base that can be attached to a flat surface or a wall surface ;
The sleeve antenna according to claim 1 or claim 2, further comprising a. 前記支持装置の支持部又は支持台には、前記折り返し部を収納する空間が設けられ、
前記支持装置の支持台には、概略支持台の大きさとなるよう構成された反射板が収納されていることを特徴とする請求項３に記載のスリーブアンテナ。 Wherein the support or the support base of the support device, the space for accommodating the folded portion is provided et al is,
Wherein the support base of the support device, the sleeve antenna according to claim 3, characterized in that the anti-radiation plate that is configured to be of general support table size is accommodated. 前記支持装置は、前記支持部に対し前記アンテナ部を前記支持台と平行になるよう傾動させた際、前記支持台が、前記アンテナ部の支持部側よりも先端側へより大きく突出されて、前記アンテナ部と対向するよう構成されていることを特徴とする請求項３又は請求項４に記載のスリーブアンテナ。 The support device, when the antenna unit with respect to the support portion is tilted so as to be parallel to the support base, the support base is, protrudes greater the support part side tip side than the antenna portion The sleeve antenna according to claim 3 or 4, wherein the sleeve antenna is configured to face the antenna unit .
JP2001187212A 2001-06-20 2001-06-20 Sleeve antenna Expired - Fee Related JP4723123B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2001187212A JP4723123B2 (en) 2001-06-20 2001-06-20 Sleeve antenna

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2001187212A JP4723123B2 (en) 2001-06-20 2001-06-20 Sleeve antenna

Publications (2)

Publication Number Publication Date
JP2003008333A JP2003008333A (en) 2003-01-10
JP4723123B2 true JP4723123B2 (en) 2011-07-13

Family

ID=19026535

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2001187212A Expired - Fee Related JP4723123B2 (en) 2001-06-20 2001-06-20 Sleeve antenna

Country Status (1)

Country Link
JP (1) JP4723123B2 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009218925A (en) * 2008-03-11 2009-09-24 Mitsubishi Cable Ind Ltd Antenna system
JP2010081433A (en) * 2008-09-26 2010-04-08 Mitsubishi Cable Ind Ltd Antenna device and method for manufacturing the same
US8253647B2 (en) * 2009-02-27 2012-08-28 Pc-Tel, Inc. High isolation multi-band monopole antenna for MIMO systems
JP5487661B2 (en) 2009-03-19 2014-05-07 ソニー株式会社 Shielded cable
JP5338411B2 (en) 2009-03-19 2013-11-13 ソニー株式会社 Antenna device
JP5361674B2 (en) * 2009-11-16 2013-12-04 株式会社ヨコオ Compound antenna

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2485457A (en) * 1944-10-20 1949-10-18 Bell Telephone Labor Inc Antenna system
JPH07176938A (en) * 1993-04-28 1995-07-14 Sansei Denki Kk Flexible antenna for mobile communication and its configuration method
JPH08293719A (en) * 1995-04-21 1996-11-05 Hitachi Ltd Communication equipment

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4217589A (en) * 1976-01-12 1980-08-12 Stahler Alfred F Ground and/or feedline independent resonant feed device for coupling antennas and the like
JPH07326920A (en) * 1994-05-27 1995-12-12 At & T Corp Antenna assembly for portable transceiver
JPH0918227A (en) * 1995-06-29 1997-01-17 Hitachi Ltd Radio device
JPH09167912A (en) * 1995-12-18 1997-06-24 Fujitsu Ltd Antenna feeding structure
JPH09232850A (en) * 1996-02-20 1997-09-05 Matsushita Electric Ind Co Ltd Antenna for mobile radio communication
JPH10284933A (en) * 1997-04-10 1998-10-23 Dx Antenna Co Ltd Antenna for mobile communication base station
JP2000031851A (en) * 1998-07-10 2000-01-28 Yokowo Co Ltd Antenna
JP3434219B2 (en) * 1998-11-02 2003-08-04 株式会社ヨコオ antenna
JP2000151251A (en) * 1998-11-05 2000-05-30 Yokowo Co Ltd Antenna
JP3655483B2 (en) * 1999-02-26 2005-06-02 株式会社東芝 ANTENNA DEVICE AND RADIO DEVICE USING THE SAME
JP3485044B2 (en) * 1999-10-15 2004-01-13 トヨタ自動車株式会社 Vehicle antenna device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2485457A (en) * 1944-10-20 1949-10-18 Bell Telephone Labor Inc Antenna system
JPH07176938A (en) * 1993-04-28 1995-07-14 Sansei Denki Kk Flexible antenna for mobile communication and its configuration method
JPH08293719A (en) * 1995-04-21 1996-11-05 Hitachi Ltd Communication equipment

Also Published As

Publication number Publication date
JP2003008333A (en) 2003-01-10

Similar Documents

Publication Publication Date Title
FI119861B (en) level antenna
CN1767558B (en) Mobile wireless terminal
HU206793B (en) Telescopic aerial for battery-type portable two-way set
EP1137101B1 (en) Antenna apparatus and wireless communication apparatus
HU182355B (en) Aerial array for handy radio transceiver
KR19990071190A (en) Portable wireless terminal antenna
US20120106036A1 (en) Built-in type antenna displayer
US7522104B2 (en) Antenna and wireless apparatus
JP4723123B2 (en) Sleeve antenna
WO2002056415A1 (en) Built-in anenna of portable radio apparatus
JP2000509926A (en) Antenna device having matching means
EP0997967A1 (en) Retractable antenna unit for a mobile phone
WO2013136794A1 (en) Sleeve antenna and wireless communication device
CN1620739B (en) Antenna device
JP3982098B2 (en) Antenna and portable terminal device
JP2004526378A (en) Portable wireless telephone
JP4249090B2 (en) Loop antenna and antenna device
JP2004128740A (en) Radiation electrode element and multi-frequency antenna constituted thereof
JP2006013877A (en) Antenna system
JP2003283238A (en) Antenna device, communication device and method for designing the antenna device
JP2001168620A (en) Antenna device
JP3634256B2 (en) Antenna device
US20070146226A1 (en) Embedded chip antenna having complementary radiator structure
US6781549B1 (en) Portable antenna
JPH11308030A (en) Antenna device and portable radio equipment provided with the same

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20080609

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20100823

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20101005

RD02 Notification of acceptance of power of attorney

Free format text: JAPANESE INTERMEDIATE CODE: A7422

Effective date: 20101112

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20101206

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20110315

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20110407

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

Free format text: PAYMENT UNTIL: 20140415

Year of fee payment: 3

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

LAPS Cancellation because of no payment of annual fees