JPH1168449A - Incorporated antenna for radio equipment - Google Patents
Incorporated antenna for radio equipmentInfo
- Publication number
- JPH1168449A JPH1168449A JP9230468A JP23046897A JPH1168449A JP H1168449 A JPH1168449 A JP H1168449A JP 9230468 A JP9230468 A JP 9230468A JP 23046897 A JP23046897 A JP 23046897A JP H1168449 A JPH1168449 A JP H1168449A
- Authority
- JP
- Japan
- Prior art keywords
- antenna
- conductor plate
- gain
- radiation conductor
- antenna element
- 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.)
- Pending
Links
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は無線機用内蔵アンテ
ナに関し、特に、携帯電話システムなどの不感地に配置
される屋内設置用中継増幅器（ブースタ）に装着され、
移動局との送受信を行うための移動局向け内蔵アンテナ
の構造に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a built-in antenna for a radio device, and more particularly, to a built-in repeater amplifier (booster) for indoor installation which is arranged in a blind spot such as a portable telephone system.
The present invention relates to a structure of a built-in antenna for a mobile station for transmitting and receiving to and from a mobile station.
【０００２】[0002]
【従来の技術】近年、携帯無線機装置は、セルラー電話
等のサービスエリアの拡大と、装置の低価格化，通話コ
ストの低減に伴い、急速に普及されるようになった。し
かし、基地局からの電波レベルが低いところでの使用状
態も多く、どの場所にいても常に通話品質が良いわけで
はない。このような状況に伴い、地下街，デパート，オ
フィスなどの広範囲な不感地エリアにおいて、通話品質
を良くするために屋内設置用中継増幅器（ブースタ）の
設置が進んでいる。2. Description of the Related Art In recent years, portable radio equipment has been rapidly spread with the expansion of service areas such as cellular telephones, price reduction of equipment, and reduction of communication costs. However, there are many situations where the radio wave level from the base station is low, and the communication quality is not always good in any place. With such a situation, in a wide blind area such as an underground shopping mall, a department store, or an office, a relay amplifier (booster) for indoor installation has been installed in order to improve the communication quality.
【０００３】従来の屋内設置用中継増幅器の移動局向け
アンテナとしては、半波長ダイポールアンテナ等の外部
接続の棒状あるいは線状アンテナを使用したものと、レ
ドーム（電磁的に透明な覆い）の役割をもった樹脂ケー
ス内にアンテナ素子を収容し、外部要因による損傷を受
けにくくした構造で、かつ、室内の美観を損なわないよ
うにした内蔵アンテナを使用するものとがある。As a conventional antenna for a mobile station of a relay amplifier for indoor installation, a rod-shaped or linear antenna connected externally, such as a half-wave dipole antenna, and a radome (electromagnetically transparent cover) are used. There is a case in which an antenna element is housed in a resin case having a structure in which the antenna element is hardly damaged by external factors, and a built-in antenna which does not impair the aesthetic appearance of the room is used.
【０００４】上記の内蔵アンテナは、板状逆Ｆアンテナ
といわれる高さの低い低姿勢の平面アンテナが用いられ
ている。図１２は従来の板状逆Ｆアンテナといわれる平
面アンテナの構造の概要を示す斜視図である。図におい
て、１は接地導体板、２はその一辺が直角に折り曲げら
れて接地導体板１に固定された放射導体板、この折り曲
げた部分を短絡導体部という。３はインピーダンス整合
をとるために、放射導体板２の折り曲げた短絡導体部の
位置から任意の距離だけ離れた点に給電する給電線であ
る。側面からみると放射導体板２と給電線３で逆Ｆ字状
になっている。As the above-mentioned built-in antenna, a planar antenna having a low height and a low attitude, which is called a plate-shaped inverted-F antenna, is used. FIG. 12 is a perspective view showing an outline of a structure of a conventional planar antenna called a plate-shaped inverted-F antenna. In the figure, 1 is a ground conductor plate, 2 is a radiation conductor plate whose one side is bent at a right angle and fixed to the ground conductor plate 1, and this bent portion is called a short-circuit conductor portion. Reference numeral 3 denotes a power supply line for supplying power to a point at an arbitrary distance from the bent short-circuit conductor portion of the radiation conductor plate 2 for impedance matching. When viewed from the side, the radiation conductor plate 2 and the feeder line 3 form an inverted F shape.
【０００５】図１３は図１２に示した板状逆Ｆアンテナ
の特性例である。水平面内アンテナ指向特性は、放射導
体板２の正面方向（Ｙ方向）にピークをもつブロードな
特性を示している。FIG. 13 shows an example of characteristics of the plate-shaped inverted-F antenna shown in FIG. The antenna directivity in the horizontal plane shows a broad characteristic having a peak in the front direction (Y direction) of the radiation conductor plate 2.
【０００６】[0006]
【発明が解決しようとする課題】しかしながら、上記従
来の中継増幅器の移動機向け内蔵アンテナでは、十分な
アンテナ利得が得られないため、電波の届かない広範囲
なエリアをカバーすることはむつかしく、エリアが広い
場合は複数の中継装置を配置する必要があり、高価な中
継システムになるという問題がある。However, with the above-mentioned conventional built-in antenna for a mobile unit of a relay amplifier, a sufficient antenna gain cannot be obtained, so that it is difficult to cover a wide area where radio waves cannot reach. In the case of a wide area, it is necessary to arrange a plurality of relay devices, and there is a problem that the relay system becomes expensive.
【０００７】本発明の目的は、従来技術の問題点である
１つの不感地に複数の中継装置を配置するという高価な
中継増幅システムの一要因となる対移動局送受信アンテ
ナの利得の不足を改善し、高利得を実現することのでき
る無線機用内蔵アンテナを提供することにある。SUMMARY OF THE INVENTION It is an object of the present invention to improve the shortage of the gain of a transmitting / receiving antenna for a mobile station, which is a problem of the prior art and is a factor of an expensive repeater amplification system in which a plurality of repeaters are arranged in one blind spot. Another object of the present invention is to provide a built-in antenna for a wireless device that can realize a high gain.
【０００８】[0008]
【課題を解決するための手段】上記の目的を達成するた
めの本発明の無線機用内蔵アンテナは、無線機回路が収
容されたケースを樹脂製のカバーで覆った無線機の該カ
バーの内側に設けられ、前記ケースの開口部分に固定さ
れた接地導体板と、該接地導体板と並行し前記カバーと
の間に所定の間隔をおいて配置され一辺が直角に折り曲
げられて該接地導体板に固定された放射導体板と、該放
射導体板の側縁部に接続された給電線とからなる逆Ｆ形
の無線機用内蔵アンテナにおいて、前記無線機の送受信
電波の波長の１／２以下の長さの少なくとも１つの線状
無給電アンテナ素子が、前記カバーの内側の前記放射導
体板の近傍に並行して固定され、前記放射導体板との誘
導結合によりアンテナ利得を大きくしたことを特徴とす
るものである。SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, a built-in antenna for a radio device according to the present invention comprises a case in which a radio circuit is accommodated by a resin cover. And a ground conductor plate fixed to an opening of the case, and a predetermined distance between the ground conductor plate and the cover in parallel with the ground conductor plate, one side of which is bent at a right angle to form the ground conductor plate. In the inverted F-type built-in antenna for a radio, which includes a radiation conductor plate fixed to the antenna and a feeder line connected to a side edge of the radiation conductor plate, the wavelength of the radio wave transmitted and received by the radio is 送 受 信 or less. At least one linear parasitic antenna element having a length is fixed in parallel to the vicinity of the radiation conductor plate inside the cover, and the antenna gain is increased by inductive coupling with the radiation conductor plate. It is assumed that.
【０００９】さらに、前記線状無給電アンテナ素子と前
記放射導体板との間隔は、前記無線機の送受信電波の波
長の３／１００程度が好ましく、波長の１／１００〜５
／１００の範囲の間隔に設定されたことを特徴とし、前
記線状無給電アンテナ素子は、導電性の良い導体であ
り、前記樹脂製のカバーに一体化成形されたことを特徴
とするものである。Further, the distance between the linear parasitic antenna element and the radiating conductor plate is preferably about 3/100 of the wavelength of the radio wave transmitted / received by the radio, and is preferably 1/100 to 5/100 of the wavelength.
The linear parasitic antenna element is a conductor having good conductivity, and is formed integrally with the resin cover. is there.
【００１０】[0010]
【発明の実施の形態】本発明の無線機用内蔵アンテナ
は、逆Ｆ状平面アンテナの放射導体板２の近傍に無給電
の線状アンテナ素子５を所定の間隔をおいて配置したこ
とが特徴であり、放射導体板２と無給電の線状アンテナ
素子５との誘導結合によりアンテナ利得を高くしたもの
である。即ち、送信の場合は、平面アンテナ（放射導体
板２）の近傍電界により、線状無給電アンテナ素子５に
誘導電流が流れ、平面アンテナと線状無給電アンテナ素
子の両方から空間に放射される電波が位相合成され、全
体として高利得アンテナとして作用するものである。受
信の場合はその逆の作用で受信感度が高くなる。BEST MODE FOR CARRYING OUT THE INVENTION The built-in antenna for a radio according to the present invention is characterized in that a non-feeding linear antenna element 5 is arranged at a predetermined interval near a radiating conductor plate 2 of an inverted-F planar antenna. The antenna gain is increased by inductive coupling between the radiation conductor plate 2 and the passive antenna element 5. That is, in the case of transmission, an induced current flows through the linear parasitic antenna element 5 due to an electric field near the planar antenna (radiating conductor plate 2), and is radiated into space from both the planar antenna and the linear parasitic antenna element. The radio waves are phase-combined and act as a high-gain antenna as a whole. In the case of reception, the reception sensitivity is increased by the opposite operation.
【００１１】以下に本発明の実施例を図面を参照して説
明する。図１は本発明の第１の実施例を示す構造図であ
り、（Ａ）は外観斜視図、（Ｂ）はその縦断面図、
（Ｃ）は分解斜視図である。図において、４は中継増幅
器のユニットケースであり、増幅器，フィルタ，電源，
制御部などの無線機回路モジュールが内部に実装されて
いる。１は接地導体板、２は放射導体板であり、図１２
に示した従来の平面アンテナである。An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a structural view showing a first embodiment of the present invention, in which (A) is an external perspective view, (B) is a longitudinal sectional view thereof,
(C) is an exploded perspective view. In the figure, reference numeral 4 denotes a unit case of a relay amplifier, which includes an amplifier, a filter, a power supply,
A radio circuit module such as a control unit is mounted inside. 1 is a ground conductor plate, 2 is a radiation conductor plate, and FIG.
Is a conventional planar antenna shown in FIG.
【００１２】本実施例では、放射導体板２の横幅Ｗ，長
さＬ，高さＨは、例えば、それぞれ６０mm，７０mm，１
５mmである。横幅Ｗと長さＬを加えた長さを１／４波長
にほぼ等しくすると共振する。５は本発明の要部となる
線状で長さがｍの無給電アンテナ素子であり、放射導体
板２と共にアンテナ素子として機能している。６はユニ
ット内部を保護する樹脂製のユニットカバー（レドー
ム）であり、線状無給電アンテナ素子５が取り付けられ
ている。In this embodiment, the width W, length L, and height H of the radiation conductor plate 2 are, for example, 60 mm, 70 mm, 1 mm, respectively.
5 mm. When the length obtained by adding the width W and the length L is substantially equal to １ ／ wavelength, resonance occurs. Reference numeral 5 denotes a linear, parasitic antenna element having a length of m which is a main part of the present invention, and functions together with the radiation conductor plate 2 as an antenna element. Reference numeral 6 denotes a resin unit cover (radome) for protecting the inside of the unit, to which the linear parasitic antenna element 5 is attached.
【００１３】線状無給電アンテナ素子５は、銅又はアル
ミニウムなど導電性のよい線状素子であり、その長さｍ
は、送受信電波の波長λの１／２より短い長さ、例え
ば、０．４８λ程度であり、０．４７λ〜０．４９λの
範囲（利得偏差が１dB以内）が好ましく、ユニットカバ
ー６の内側に接着固定、あるいは合成樹脂のインサート
成形技術によりユニットカバー６に一体化成形され、放
射導体板２の横に縁部からの水平間隔δで平行配置され
た無給電素子である。αは放射導体板２の高さＨの方向
の垂直間隔である。The linear parasitic antenna element 5 is a linear element having good conductivity such as copper or aluminum, and has a length m.
Is a length shorter than の of the wavelength λ of the transmission / reception radio wave, for example, about 0.48λ, preferably in a range of 0.47λ to 0.49λ (gain deviation is within 1 dB). The parasitic element is integrally formed on the unit cover 6 by adhesive fixing or synthetic resin insert molding technology, and is arranged in parallel with the radiating conductor plate 2 at a horizontal distance δ from the edge. α is a vertical interval in the direction of the height H of the radiation conductor plate 2.
【００１４】放射導体板２と線状無給電アンテナ素子５
との水平間隔δ及び垂直間隔αは、アンテナ利得を設定
する重要なパラメータである。図２は、図１（Ａ）のＡ
Ａ’横断面図であり、線状無給電アンテナ素子５の３つ
の態様の配置例５（１），５（２），５（３）を示す。
この配置例の中の５（３）は、垂直間隔αがマイナスの
場合、すなわち、放射導体板２の高さＨより低い場合で
ある。Radiating conductor plate 2 and linear parasitic antenna element 5
Are the important parameters for setting the antenna gain. FIG. 2 is a cross-sectional view of A in FIG.
FIG. 4 is a cross-sectional view of A ′, showing arrangement examples 5 (1), 5 (2), and 5 (3) of the linear parasitic antenna element 5 in three modes.
5 (3) in this arrangement example is a case where the vertical interval α is minus, that is, a case where the height is lower than the height H of the radiation conductor plate 2.
【００１５】図３は水平間隔δ＝１０mmのときの垂直間
隔αに対するアンテナ利得の特性例図である。また、図
４は垂直間隔α＝０（放射導体板２の面と同一平面内）
のときの水平間隔δに対するアンテナ利得特性例図であ
る。図４（Ａ）は水平間隔δと水平面内（ＸＹ平面）で
の最大方向利得との関係を示し、（Ｂ）は水平間隔δと
水平面内の全方向平均利得との関係である。いずれも、
アンテナ利得が最大となる最適な水平間隔δは約１０mm
である。尚、レファレンスとして図１２に示した従来ア
ンテナの利得ｂを破線で表示している。FIG. 3 is a graph showing a characteristic example of the antenna gain with respect to the vertical interval α when the horizontal interval δ = 10 mm. FIG. 4 shows the vertical interval α = 0 (in the same plane as the surface of the radiation conductor plate 2).
FIG. 9 is an example diagram of antenna gain characteristics with respect to a horizontal interval δ at the time of FIG. FIG. 4A shows the relationship between the horizontal interval δ and the maximum gain in the horizontal plane (XY plane), and FIG. 4B shows the relationship between the horizontal interval δ and the omnidirectional average gain in the horizontal plane. In each case,
The optimal horizontal spacing δ at which the antenna gain is maximum is about 10 mm
It is. The gain b of the conventional antenna shown in FIG. 12 is indicated by a broken line as a reference.
【００１６】図１に示した第１の実施例において、線状
無給電アンテナ素子５の取付位置が図２の５（２）の配
置の場合、即ち、α＝０の場合、周波数９００MHz にお
いて、放射導体板２と線状無給電アンテナ素子５との水
平間隔δを１０mm（約百分の３波長）、線状無給電アン
テナ素子５の長さｍを実験により決定した半波長よりも
若干短い１６０mm（百分の４８波長）のとき、アンテナ
利得が最も大きくなった。上記の第１の実施例のアンテ
ナ指向特性を図５に示す。実線の特性ｃは第１の実施例
のアンテナの特性を示し、破線の特性ｄは従来のアンテ
ナの特性である。図から明らかなように、本発明のアン
テナは、０度から１８０度までの正面方向（Ｙ方向）の
全てにおいて従来のアンテナよりも利得が大きく、最大
で７dB、平均で６．２dBの利得向上が認められる。In the first embodiment shown in FIG. 1, when the mounting position of the linear parasitic antenna element 5 is the arrangement of 5 (2) in FIG. 2, that is, when α = 0, at a frequency of 900 MHz, The horizontal spacing δ between the radiation conductor plate 2 and the linear parasitic antenna element 5 is 10 mm (about 3/100 wavelength), and the length m of the linear parasitic antenna element 5 is slightly shorter than the half wavelength determined by experiments. At 160 mm (48/100 wavelengths), the antenna gain was highest. FIG. 5 shows the antenna directivity characteristics of the first embodiment. A solid line characteristic c indicates the characteristic of the antenna of the first embodiment, and a broken line characteristic d indicates the characteristic of the conventional antenna. As is clear from the figure, the antenna of the present invention has a larger gain than the conventional antenna in all frontal directions (Y direction) from 0 degrees to 180 degrees, with a gain improvement of 7 dB at the maximum and 6.2 dB on average. Is recognized.
【００１７】図６は本発明の第２の実施例を示す斜視図
（Ａ）と分解斜視図（Ｂ）であり、線状無給電アンテナ
素子５を放射導体板２の幅Ｗのほぼ中心線上にα＝１０
mmの垂直間隔でＺ方向に平行配置したものである。この
実施例のアンテナ指向性は第１の実施例とは若干異な
り、図７に示すように、最大利得方向が正面（Ｙ方向）
を向いている。この例では、図示を省略したが、線状無
給電アンテナ素子５を、図６の配置方向と直交するよう
にＸ方向に平行配置したときも、最大方向利得及び平均
利得はほとんど同じであり、従来アンテナに比べてそれ
ぞれ７．１dB，６．６dBの利得向上が認められる。FIG. 6 is a perspective view (A) and an exploded perspective view (B) showing a second embodiment of the present invention, in which the linear parasitic antenna element 5 is positioned substantially on the center line of the width W of the radiation conductor plate 2. Α = 10
They are arranged in parallel in the Z direction at a vertical interval of mm. The antenna directivity of this embodiment is slightly different from that of the first embodiment, and the maximum gain direction is the front (Y direction) as shown in FIG.
Is facing. Although not shown in this example, when the linear parasitic antenna element 5 is arranged in parallel to the X direction so as to be orthogonal to the arrangement direction in FIG. 6, the maximum direction gain and the average gain are almost the same, As compared with the conventional antenna, gain improvements of 7.1 dB and 6.6 dB are recognized, respectively.
【００１８】図８は本発明の第３の実施例を示す斜視図
であり、放射導体板２の両側にそれぞれ線状無給電アン
テナ素子５をＺ方向に平行配置した構成であり、その指
向特性は、図９に示すように最大利得方向が正面（Ｙ方
向）を向き、図７の特性と同様の効果が認められる。FIG. 8 is a perspective view showing a third embodiment of the present invention, in which linear parasitic antenna elements 5 are respectively arranged on both sides of a radiation conductor plate 2 in parallel in the Z direction. In FIG. 9, the maximum gain direction faces the front (Y direction) as shown in FIG. 9, and the same effect as the characteristic in FIG. 7 is recognized.
【００１９】図１０は第３の実施例の水平間隔β＝１０
mmのときの垂直間隔αに対するアンテナ利得特性例図で
ある。FIG. 10 shows a horizontal interval β = 10 according to the third embodiment.
FIG. 9 is an example diagram of antenna gain characteristics with respect to a vertical interval α when mm.
【００２０】図１１は図８に示した第３の実施例におい
て、放射導体板２の長さ方向の中心に対する線状アンテ
ナ素子５の中心の上（＋）下（−）の偏位を中心からの
距離Ａとして、その距離Ａに対するアンテナ利得特性例
である。距離Ａが−６０mm〜＋１５mmの範囲内、即ち、
−０．１８λ〜０．０４５λの範囲内では、最大利得か
ら−１dB以内の偏差に収まっている。FIG. 11 shows, in the third embodiment shown in FIG. 8, a deviation centered (+) and (-) above the center of the linear antenna element 5 with respect to the center in the longitudinal direction of the radiation conductor plate 2. 7 shows an example of an antenna gain characteristic with respect to a distance A from a distance A. The distance A is in the range of −60 mm to +15 mm, that is,
Within the range of −0.18λ to 0.045λ, the deviation is within −1 dB from the maximum gain.
【００２１】以上の実施例では、放射導体板５に対する
線状無給電アンテナ素子５の水平間隔δ，βおよび垂直
間隔αは、いずれも約０．０３λが好ましく、従来と比
較して最大利得方向で７dB以上、水平面平均利得でも６
dB以上の利得向上が認められ、絶対利得で約７．５dBi
の極めて高い利得のアンテナを実現することができた。In the above embodiment, the horizontal spacing δ, β and the vertical spacing α of the linear parasitic antenna element 5 with respect to the radiation conductor plate 5 are preferably about 0.03λ, and the maximum gain direction is smaller than the conventional one. 7 dB or more, and 6 in the horizontal average gain
Gain improvement of more than dB is recognized, and the absolute gain is about 7.5 dBi
The antenna having an extremely high gain can be realized.
【００２２】本発明のその他の実施例として、図１，図
６，図８に示した第１〜第３の実施例を任意に組み合わ
せて第４，第５の実施例を構成することもでき、同様の
効果を得ることができる。As another embodiment of the present invention, the first to third embodiments shown in FIGS. 1, 6 and 8 can be arbitrarily combined to form the fourth and fifth embodiments. The same effect can be obtained.
【００２３】更に、前述の本発明の実施例における線状
アンテナ素子５は、無給電なのでユニットケース６に取
り付ける構成が経済的であるが、接地導体板１に、絶縁
支持具で取り付けてもよい。その場合は、ユニットケー
ス６の形状が線状アンテナ素子５の取り付け位置に関係
がなくなるという利点がある。Furthermore, the linear antenna element 5 in the above-described embodiment of the present invention is economical to be mounted on the unit case 6 because it is powered off. However, it may be mounted on the ground conductor plate 1 with an insulating support. . In that case, there is an advantage that the shape of the unit case 6 has no relation to the mounting position of the linear antenna element 5.
【００２４】[0024]
【発明の効果】以上詳細に説明したように、本発明のア
ンテナを実施することにより、簡単な構造でアンテナ利
得を大幅に向上する効果があり、１つの中継装置でより
広域をカバーすることができるので不感地内の中継装置
の配置数を減らすことができるため、中継増幅システム
の経済化を推進できるという極めて大きな効果がある。As described in detail above, implementing the antenna of the present invention has the effect of greatly improving the antenna gain with a simple structure, so that a single relay device can cover a wider area. Since it is possible to reduce the number of relay devices to be arranged in a blind spot, there is an extremely great effect that the economy of the relay amplification system can be promoted.
【図１】本発明の第１の実施例を示す斜視図と断面図で
ある。FIG. 1 is a perspective view and a sectional view showing a first embodiment of the present invention.
【図２】本発明の第１の実施例の３つの態様を示す横断
面図である。FIG. 2 is a cross-sectional view showing three aspects of the first embodiment of the present invention.
【図３】本発明の第１の実施例における水平間隔δ＝１
０mmのときの垂直間隔αとアンテナ利得の関係を示す特
性例図である。FIG. 3 shows a horizontal interval δ = 1 in the first embodiment of the present invention.
FIG. 6 is a characteristic example diagram showing a relationship between a vertical interval α and an antenna gain at 0 mm.
【図４】本発明の第１の実施例における垂直間隔α＝０
mmのときの水平間隔δとアンテナ利得の関係を示す特性
例図である。FIG. 4 shows a vertical interval α = 0 according to the first embodiment of the present invention.
FIG. 9 is a characteristic example diagram showing a relationship between a horizontal interval δ and an antenna gain when the distance is mm.
【図５】本発明の第１の実施例のアンテナ指向特性例図
である。FIG. 5 is an example of an antenna directivity characteristic of the first embodiment of the present invention.
【図６】本発明の第２の実施例を示す斜視図と分解斜視
図である。FIG. 6 is a perspective view and an exploded perspective view showing a second embodiment of the present invention.
【図７】本発明の第２の実施例のアンテナ指向特性例図
である。FIG. 7 is an example of an antenna directivity characteristic of the second embodiment of the present invention.
【図８】本発明の第３の実施例を示す斜視図である。FIG. 8 is a perspective view showing a third embodiment of the present invention.
【図９】本発明の第３の実施例のアンテナ指向特性例図
である。FIG. 9 is an example of an antenna directivity characteristic according to the third embodiment of the present invention.
【図１０】本発明の第３の実施例におけるβ＝１０mmの
ときの垂直間隔αに対するアンテナ利得の特性例図であ
る。FIG. 10 is a diagram illustrating a characteristic example of an antenna gain with respect to a vertical interval α when β = 10 mm in the third embodiment of the present invention.
【図１１】本発明の第３の実施例における線状無給電ア
ンテナ素子５の長さ方向の位置Ａに対するアンテナ利得
の特性例図である。FIG. 11 is a graph showing a characteristic example of an antenna gain with respect to a position A in a length direction of a linear parasitic antenna element 5 according to a third embodiment of the present invention.
【図１２】従来の板状逆Ｆアンテナの斜視図である。FIG. 12 is a perspective view of a conventional plate-shaped inverted F antenna.
【図１３】従来の水平面内アンテナ指向特性例図であ
る。FIG. 13 is a diagram illustrating an example of a conventional antenna directional characteristic in a horizontal plane.
１ 接地導体板 ２ 放射導体板 ３ 給電線 ４ ユニットケース ５ 線状無給電アンテナ素子 ６ ユニットカバー Ｗ 放射導体板の横幅 Ｌ 放射導体板の長さ Ｈ 放射導体板の高さ ｍ 線状無給電アンテナ素子の長さ δ，β 放射導体板と線状無給電アンテナ素子との水平
間隔 α 放射導体板と線状無給電アンテナ素子との垂直間隔DESCRIPTION OF SYMBOLS 1 Ground conductor plate 2 Radiation conductor plate 3 Feeding line 4 Unit case 5 Linear parasitic antenna element 6 Unit cover W Width of radiation conductor plate L Length of radiation conductor plate H Height of radiation conductor plate m Linear parasitic antenna Element length δ, β Horizontal spacing between radiating conductor plate and linear parasitic antenna element α Vertical spacing between radiating conductor plate and linear parasitic antenna element
Claims (3)
のカバーで覆った無線機の該カバーの内側に設けられ、
前記ケースの開口部分に固定された接地導体板と、該接
地導体板と並行し前記カバーとの間に所定の間隔をおい
て配置され一辺が直角に折り曲げられて該接地導体板に
固定された放射導体板と、該放射導体板の側縁部に接続
された給電線とからなる逆Ｆ形の無線機用内蔵アンテナ
において、 前記無線機の送受信電波の波長の１／２以下の長さの少
なくとも１つの線状無給電アンテナ素子が、前記カバー
の内側の前記放射導体板の近傍に並行して固定され、前
記放射導体板との誘導結合によりアンテナ利得を大きく
したことを特徴とする無線機用内蔵アンテナ。1. A wireless device in which a case in which a wireless device circuit is housed is covered with a cover made of resin, provided inside the cover of the wireless device,
A ground conductor plate fixed to the opening of the case, and arranged at a predetermined distance between the cover and the ground conductor plate in parallel with the ground conductor plate, one side of which is bent at a right angle and fixed to the ground conductor plate. An inverted F-shaped built-in antenna for a radio, comprising a radiation conductor plate and a feed line connected to a side edge of the radiation conductor plate, wherein the length of the antenna is not more than の of the wavelength of a radio wave transmitted and received by the radio. At least one linear parasitic antenna element is fixed in parallel near the radiation conductor plate inside the cover, and the antenna gain is increased by inductive coupling with the radiation conductor plate. Built-in antenna.
導体板との間隔は、前記無線機の送受信電波の波長の３
／１００程度が好ましく、波長の１／１００〜５／１０
０の範囲の間隔に設定されたことを特徴とする請求項１
記載の無線機用内蔵アンテナ。2. The distance between the linear parasitic antenna element and the radiating conductor plate is set to three times the wavelength of a radio wave transmitted and received by the wireless device.
Is preferably about 1/100, and is 1/100 to 5/10 of the wavelength.
2. An interval set in a range of 0.
The built-in antenna for the radio described.
の良い導体であり、前記樹脂製のカバーに一体化成形さ
れたことを特徴とする請求項１および請求項２記載の無
線機用内蔵アンテナ。3. The wireless device according to claim 1, wherein the linear parasitic antenna element is a conductor having good conductivity, and is integrally formed with the resin cover. Built-in antenna.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9230468A JPH1168449A (en) | 1997-08-13 | 1997-08-13 | Incorporated antenna for radio equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9230468A JPH1168449A (en) | 1997-08-13 | 1997-08-13 | Incorporated antenna for radio equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH1168449A true JPH1168449A (en) | 1999-03-09 |
Family
ID=16908307
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9230468A Pending JPH1168449A (en) | 1997-08-13 | 1997-08-13 | Incorporated antenna for radio equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH1168449A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1098387A1 (en) * | 1999-05-21 | 2001-05-09 | Matsushita Electric Industrial Co., Ltd. | Mobile communication antenna and mobile communication apparatus using it |
| JP2003510935A (en) * | 1999-09-30 | 2003-03-18 | ハラダ・インダストリーズ（ヨーロッパ）リミテッド | Dual band microstrip antenna |
| WO2003056658A1 (en) * | 2001-12-27 | 2003-07-10 | Matsushita Electric Industrial Co., Ltd. | Antenna for communication terminal apparatus |
| KR100434456B1 (en) * | 2000-11-13 | 2004-06-05 | 삼성전자주식회사 | Antenna apparatus of radio terminal |
| JP2017063364A (en) * | 2015-09-25 | 2017-03-30 | Fdk株式会社 | Antenna device |
| WO2020203598A1 (en) | 2019-03-29 | 2020-10-08 | 株式会社フェニックスソリューション | Rfid tag with boost antenna, conductor provided with rfid tag with boost antenna, and rfid system including rfid tag with boost antenna |
| JP2022040365A (en) * | 2010-11-22 | 2022-03-10 | エヌキャップ ライセンシング エルエルシー | Antenna system |
-
1997
- 1997-08-13 JP JP9230468A patent/JPH1168449A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6980158B2 (en) | 1999-05-21 | 2005-12-27 | Matsushita Electric Industrial Co., Ltd. | Mobile telecommunication antenna and mobile telecommunication apparatus using the same |
| EP1098387A4 (en) * | 1999-05-21 | 2002-07-31 | Matsushita Electric Ind Co Ltd | Mobile communication antenna and mobile communication apparatus using it |
| US6850779B1 (en) | 1999-05-21 | 2005-02-01 | Matsushita Electric Industrial Co., Ltd. | Mobile communication antenna and mobile communication apparatus using it |
| EP1098387A1 (en) * | 1999-05-21 | 2001-05-09 | Matsushita Electric Industrial Co., Ltd. | Mobile communication antenna and mobile communication apparatus using it |
| JP2003510935A (en) * | 1999-09-30 | 2003-03-18 | ハラダ・インダストリーズ（ヨーロッパ）リミテッド | Dual band microstrip antenna |
| JP4695319B2 (en) * | 1999-09-30 | 2011-06-08 | 原田工業株式会社 | Dual-band microstrip antenna |
| KR100434456B1 (en) * | 2000-11-13 | 2004-06-05 | 삼성전자주식회사 | Antenna apparatus of radio terminal |
| US6924769B2 (en) | 2001-12-27 | 2005-08-02 | Matsushita Electric Industrial Co., Ltd. | Antenna for communication terminal apparatus |
| WO2003056658A1 (en) * | 2001-12-27 | 2003-07-10 | Matsushita Electric Industrial Co., Ltd. | Antenna for communication terminal apparatus |
| JP2022040365A (en) * | 2010-11-22 | 2022-03-10 | エヌキャップ ライセンシング エルエルシー | Antenna system |
| JP2017063364A (en) * | 2015-09-25 | 2017-03-30 | Fdk株式会社 | Antenna device |
| WO2020203598A1 (en) | 2019-03-29 | 2020-10-08 | 株式会社フェニックスソリューション | Rfid tag with boost antenna, conductor provided with rfid tag with boost antenna, and rfid system including rfid tag with boost antenna |
| US11809939B2 (en) | 2019-03-29 | 2023-11-07 | Kyocera Corporation | RFID tag with boost antenna, conductor provided with RFID tag with boost antenna, and RFID system including RFID tag with boost antenna |
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