JPH09148838A - Micro strip antenna - Google Patents
Micro strip antennaInfo
- Publication number
- JPH09148838A JPH09148838A JP7339817A JP33981795A JPH09148838A JP H09148838 A JPH09148838 A JP H09148838A JP 7339817 A JP7339817 A JP 7339817A JP 33981795 A JP33981795 A JP 33981795A JP H09148838 A JPH09148838 A JP H09148838A
- Authority
- JP
- Japan
- Prior art keywords
- loop
- dielectric plate
- antenna
- excitation element
- parasitic
- 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
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- 230000003071 parasitic effect Effects 0.000 claims abstract description 39
- 239000002184 metal Substances 0.000 claims abstract description 14
- 230000005284 excitation Effects 0.000 claims description 58
- 238000010295 mobile communication Methods 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 230000005855 radiation Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 4
- 239000003550 marker Substances 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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- Aerials With Secondary Devices (AREA)
- Waveguide Aerials (AREA)
- Details Of Aerials (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は無線通信システム用アン
テナ、特に移動通信システムの無線基地局アンテナとし
て使用するのに適するアンテナに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antenna for a wireless communication system, and more particularly to an antenna suitable for use as a wireless base station antenna for a mobile communication system.
【0002】[0002]
【従来の技術】移動通信システムの無線基地局アンテナ
としては各種のアンテナが使用されている。例えばわが
国の代表的な移動無線システムであるPHSシステム用
として、コリニアアンテナが使用されている。その他、
ブラウンアンテナ、スリーブアンテナ等も使用されてい
る。これらのアンテナは線状アンテナと呼ばれ、線状に
形成された励振素子から電磁波が送信される形式で現在
ほとんどがこの形式である。上記のアンテナは最近の良
質でかつ安価な誘電体板の出現にともない、金属皮膜を
誘電体板の表面に被着させた形式の線状アンテナ−通常
これはマイクロストリップアンテナと呼ばれる−が使用
されている。一方、ダイポールアンテナの先端を互いに
接続して、これらのダイポールのうちの一つを中央で給
電した「折り返しダイポールアンテナ」と言うアンテナ
形式がある。一般に給電部からみてアンテナ全体が閉じ
た電気回路を形成しているものはループアンテナと呼ば
れているが、「折り返しダイポールアンテナ」もこの範
疇にはいる。「折り返しダイポールアンテナ」もアマチ
ュア無線や、特殊通信等で広く使用されている。しかし
ながら、移動通信システムの無線基地局アンテナとして
は使用実績はない様である。2. Description of the Related Art Various antennas are used as radio base station antennas in mobile communication systems. For example, a collinear antenna is used for a PHS system, which is a typical mobile radio system in Japan. Other,
Brown antennas, sleeve antennas, etc. are also used. These antennas are called linear antennas, and are a form in which electromagnetic waves are transmitted from a linearly formed exciting element, and most of them are currently in this form. With the recent advent of high-quality and inexpensive dielectric plates, the above-mentioned antennas have been used as linear antennas of the type in which a metal film is deposited on the surface of the dielectric plate-usually called microstrip antennas. ing. On the other hand, there is an antenna type called "folded dipole antenna" in which the tips of the dipole antennas are connected to each other and one of these dipoles is fed in the center. Generally, an antenna that forms an electric circuit in which the entire antenna is closed when viewed from the power feeding section is called a loop antenna, but a "folded dipole antenna" also falls within this category. The "folded dipole antenna" is also widely used in amateur radio and special communications. However, it does not seem to be used as a radio base station antenna for mobile communication systems.
【0003】[0003]
【発明が解決しようとする課題】「折り返しダイポール
アンテナ」(以下ループアンテナと略称)が移動通信シ
ステムの無線基地局アンテナとして使用されていないの
は、次の理由からと思われる。 高い利得を有するアンテナが得にくい。 使用周波数が与えられると、それに対し共振するア
ンテナの全長が定まり、アンテナ長を任意の値に変更す
ることが出来ない。 アンテナの有する形状が与えられるとその特性イン
ピーダンスが定まり、変更することが出来ない。したが
って、アンテナに給電するケーブルはケーブルの有する
特性インピーダンスがアンテナのそれと整合される様選
ばれなければならない。 アンテナの形状は通常、2次元平面に含まれる形で
なければならず、またアンテナから送出される電磁波の
指向特性は形状が定まるとそれに応じて定まるので、任
意の指向性を得るためには、他の回路・手段を用いなけ
ればならない。 アンテナの耐候性が線状アンテナに比べて劣る。 上記の事項は一言で言えば使いにくいと言う事であり、
何らかの改善が望まれていた。The "folded dipole antenna" (hereinafter abbreviated as loop antenna) is not used as a radio base station antenna of a mobile communication system for the following reason. It is difficult to obtain an antenna having a high gain. When the frequency used is given, the total length of the antenna that resonates with it is determined, and the antenna length cannot be changed to an arbitrary value. Given the shape of the antenna, its characteristic impedance is fixed and cannot be changed. Therefore, the cable feeding the antenna must be chosen so that the characteristic impedance of the cable matches that of the antenna. The shape of the antenna usually has to be included in a two-dimensional plane, and the directional characteristics of the electromagnetic wave transmitted from the antenna are determined according to the shape, so in order to obtain arbitrary directivity, Other circuits / means must be used. The weather resistance of the antenna is inferior to that of the linear antenna. In a nutshell, the above items are difficult to use,
Some improvement was desired.
【0004】[0004]
【課題を解決するための手段】本発明は以上のべたルー
プアンテナ(折り返しダイポールアンテナ)の有する電
気的特性を改善するため、最近の良質でかつ安価な誘電
体板を用い、その表面に金属皮膜を円形、矩形或いはル
ープ状回路状等の形状に形成し、被着させ励振素子とす
ることにより、マイクロストリップアンテナ化した。さ
らに前記誘電体板の前方、もしくは後方、或いは前後両
方に適当な間隔を隔てて平行に別の誘電体板群を設け、
その表面に、金属皮膜をループ状回路に被着・形成した
無給電励振素子群を設置した。そして、励振素子より発
射される電磁波が無給電励振素子により影響を受ける様
に両者の相対位置を選ぶことにより、前記ループ状回路
が本来有していた諸特性を変化可能とした。なお、従来
線状アンテナに比べ耐候性が劣るとの欠点は、使用周波
数が1GHz以上の高周波数(したがって波長が30c
m以下)になり、アンテナ全体が小型化可能になったこ
とで、アンテナ全体を外部より樹脂材料で覆うことによ
り解決可能となった。In order to improve the electrical characteristics of the solid loop antenna (folded dipole antenna) described above, the present invention uses a recent good-quality and inexpensive dielectric plate, and has a metal film on the surface thereof. Was formed into a circular, rectangular, or loop-shaped circuit shape, and was attached to form an excitation element, thereby forming a microstrip antenna. Further, another dielectric plate group is provided in parallel in front of or behind the dielectric plate, or both in front of and behind the dielectric plate at an appropriate interval.
A parasitic excitation element group in which a metal film was deposited / formed on a loop circuit was set on the surface. Then, by selecting the relative positions of the two so that the electromagnetic wave emitted from the excitation element is affected by the parasitic excitation element, various characteristics originally possessed by the loop circuit can be changed. In addition, the disadvantage that the weather resistance is inferior to the conventional linear antenna is that the operating frequency is high frequency of 1 GHz or more (hence the wavelength is 30 c
m or less), and the size of the entire antenna can be reduced, which can be solved by covering the entire antenna with a resin material from the outside.
【0005】[0005]
【作用】本発明のアンテナにおいては、誘電体板の表面
に形成されたループ状マイクロストリップ励振素子の前
方、もしくは後方、或いは前後両方に適当な間隔を隔て
て平行に別の誘電体板群を設け、その表面に、金属皮膜
を円形、矩形或いはループ状回路状等の形状に被着・形
成した無給電励振素子群を設置し、励振素子より発射さ
れる電磁波が無給電励振素子により影響を受ける様に両
者の相対位置が選ばれているから、ループ状励振素子が
本来有していた電磁波の発射特性が変化を受けることに
なる。変化を受けると言うことは、従来持たせ得なかっ
た電気的な特性を、ループアンテナの見掛け上の物理的
な寸法を変化させることなく得ることを意味している。
上記の変化の度合は前記ループ状励振素子の被着してい
る誘電体板と、これと平行して設置された別の誘電体板
との間隔をはじめ、誘電体板の数、別の誘電体板に設け
られた無給電励振素子の形状、ループ状励振素子との相
対位置等により種々の様相を呈する事になる。すなわ
ち、無給電励振素子の設置条件として、アンテナの有す
る共振波長(共振周波数)に大きな影響を受ける条件、
特性インピーダンスに影響を受ける条件、指向特性に変
化を受ける条件、前述の二者の双方、或いは前述の三者
全体に影響を受ける条件等種々様々である。In the antenna of the present invention, another dielectric plate group is formed in parallel in front of or behind the loop-shaped microstrip excitation element formed on the surface of the dielectric plate, or at both front and rear, with an appropriate interval. Provided on the surface, a parasitic excitation element group, in which a metal film is attached / formed in a circular, rectangular or loop-shaped circuit shape, is installed, and the electromagnetic waves emitted from the excitation element are affected by the parasitic excitation element. Since the relative positions of the two are selected so as to be received, the emission characteristics of the electromagnetic wave originally possessed by the loop-shaped excitation element are changed. To undergo a change means to obtain an electrical characteristic that cannot be provided conventionally without changing the apparent physical size of the loop antenna.
The degree of change described above includes the distance between the dielectric plate on which the loop-shaped excitation element is adhered and another dielectric plate installed in parallel with the dielectric plate, the number of dielectric plates, and another dielectric plate. Various aspects are exhibited depending on the shape of the parasitic excitation element provided on the body plate, the relative position to the loop-shaped excitation element, and the like. That is, as the installation condition of the parasitic excitation element, the condition that is greatly affected by the resonance wavelength (resonance frequency) of the antenna,
There are various conditions such as the condition affected by the characteristic impedance, the condition affected by the change in the directivity characteristic, the condition affected by both of the above-mentioned two, and the condition affected by the above-mentioned all three.
【0006】[0006]
【実施例】図1(a)は本発明のマイクロストリップア
ンテナの励振素子の一実施例を示す平面図である。すな
わち、本発明のループ状励振素子を垂直上方から見た図
を示し、1は放射される電磁波の波長に比し薄い誘電体
板、2は励振素子、3は給電線である。図1(b)はル
ープ状励振素子を被着・形成した誘電体板と、その前方
に適当な間隔を隔てて平行に別の誘電体板10を設け、
その誘電体板に無給電励振素子4を設け、これらを上前
方より見た図である。ループ状励振素子2と無給電励振
素子4との相対位置関係は、ループ状励振素子2と無給
電励振素子4の形状を矩形と見て、その2つの対角線の
交点を結ぶ直線が誘電体板1と垂直に交わる様に設置さ
れているものとする。1 (a) is a plan view showing an embodiment of an exciting element of a microstrip antenna according to the present invention. That is, the figure shows the loop-shaped excitation element of the present invention as viewed from above vertically, where 1 is a dielectric plate that is thinner than the wavelength of the radiated electromagnetic wave, 2 is an excitation element, and 3 is a feeder line. FIG. 1B shows a dielectric plate on which a loop-shaped excitation element is attached and formed, and another dielectric plate 10 is provided in parallel in front of the dielectric plate with an appropriate interval.
FIG. 4 is a diagram of the parasitic excitation element 4 provided on the dielectric plate and viewed from above. Regarding the relative positional relationship between the loop-shaped excitation element 2 and the parasitic excitation element 4, the shape of the loop-shaped excitation element 2 and the parasitic excitation element 4 is regarded as a rectangle, and the straight line connecting the intersections of the two diagonal lines is the dielectric plate. It is assumed that it is installed so as to intersect with 1 vertically.
【0007】以下、本発明アンテナを試作し、その有す
る特性を測定した結果を説明する。図1(a)に示すル
ープアンテナ素子の実際の寸法は横(誘電体板の長手方
向)4.8cm,縦2.6cm、全長約14.8cmで
あり、理論的計算ではループアンテナの有する特性イン
ピーダンスは約50オーム、共振波長(共振周波数)は
約15.5cm,(約1.93GHz)程度と推定され
る。また、図1(b)に示すループ状無給電励振素子4
の寸法は図2(a)に示す通りである。The results of measuring the characteristics of the prototype antenna of the present invention will be described below. The actual dimensions of the loop antenna element shown in FIG. 1A are 4.8 cm in width (longitudinal direction of the dielectric plate), 2.6 cm in length, and about 14.8 cm in total length, and theoretical calculation shows that the loop antenna has characteristics. It is estimated that the impedance is about 50 ohms and the resonance wavelength (resonance frequency) is about 15.5 cm, (about 1.93 GHz). In addition, the loop-shaped parasitic excitation element 4 shown in FIG.
2 is as shown in FIG.
【0008】図3(a)はループ状励振素子が本来有し
ていたアンテナの定在波比を示している。すなわち誘電
体板1の表面に形成されたループ状マイクロストリップ
アンテナがあり、その近傍に何等無給電励振素子等が存
在しない場合の本来の定在波比(SWR)特性を示す。
ここで言う定在波比とはアンテナ給電端子点における入
力波と反射波の比を示す。マーカ1は1.9GHz、こ
の点での定在波比は1.2621,マーカ2は2.1G
Hz、この点での定在波比は1.8732、マーカ3は
1.7GHz、この点での定在波比は4.0269をそ
れぞれ示す。図3(b)は図1(b)に示す無給電励振
素子10が誘電体板1(厚さ1.0mm)の0.8cm
前方に存在したときのアンテナの定在波比を示してい
る。図から明らかな様に、共振周波数が0.05GHz
程度低くなり、周波数2.1GHz、及び1.7GHz
に置ける定在波比が図3(a)における値より大きくな
っていることがわかる。この結果、図1(b)に示す無
給電励振素子10の存在は、ループ状励振素子が本来有
していた共振周波数を変化させると共に、狭帯域化をさ
せていることがわかる。また、この場合、アンテナの有
する指向性がシャープになり、したがってアンテナ利得
(この場合水平方向)が増加することが判明した(図面
省略)。FIG. 3A shows the standing wave ratio of the antenna originally possessed by the loop-shaped excitation element. That is, there is an original standing wave ratio (SWR) characteristic when there is a loop-shaped microstrip antenna formed on the surface of the dielectric plate 1 and there is no parasitic excitation element or the like in the vicinity thereof.
The standing wave ratio mentioned here indicates the ratio of the input wave and the reflected wave at the antenna feeding terminal point. The marker 1 has 1.9 GHz, the standing wave ratio at this point is 1.2621, and the marker 2 has 2.1 GHz.
Hz, the standing wave ratio at this point is 1.8732, the marker 3 is 1.7 GHz, and the standing wave ratio at this point is 4.0269. 3 (b) shows that the parasitic excitation element 10 shown in FIG. 1 (b) is 0.8 cm of the dielectric plate 1 (thickness 1.0 mm).
The standing wave ratio of the antenna when present in the front is shown. As is clear from the figure, the resonance frequency is 0.05 GHz.
Frequency is 2.1GHz, and 1.7GHz
It can be seen that the standing wave ratio in Fig. 3 is larger than the value in Fig. 3 (a). As a result, it can be seen that the presence of the parasitic excitation element 10 shown in FIG. 1B changes the resonance frequency originally possessed by the loop-shaped excitation element and narrows the band. Also, in this case, it was found that the directivity of the antenna becomes sharp, and therefore the antenna gain (horizontal direction in this case) increases (drawing omitted).
【0009】無給電励振素子の形状は必ずしも図2
(a)に示す様なループ状解放端子を有するものである
必要はない。図2(b)は閉ループ形状(斜線の部分
5)の1例で平面図を示す。また、この場合の寸法は図
2(b)に示す通りである。また、破線で示すループ回
路は図1(a)のループアンテナ素子2を示し、無給電
励振素子5との相対位置を明らかにしている。図2
(b)に示す形状の無給電励振素子5を図1(b)の無
給電励振素子4に示す場所へ設置した場合のアンテナの
定在波比特性を図3(c)に示す。図3(c)から明ら
かな様に、この場合はループ状励振素子2が本来有して
いた特性インピーダンスを変化(50オームから高い値
へ)させていることがわかる。The shape of the parasitic excitation element is not always shown in FIG.
It does not have to have a loop-shaped release terminal as shown in (a). FIG. 2B is a plan view showing an example of a closed loop shape (hatched portion 5). The dimensions in this case are as shown in FIG. The loop circuit shown by the broken line shows the loop antenna element 2 of FIG. 1A, and the relative position with respect to the parasitic excitation element 5 is clarified. FIG.
The standing wave ratio characteristic of the antenna when the parasitic excitation element 5 having the shape shown in (b) is installed in the place shown in the parasitic excitation element 4 in FIG. 1 (b) is shown in FIG. 3 (c). As is apparent from FIG. 3C, in this case, the characteristic impedance originally possessed by the loop-shaped excitation element 2 is changed (from 50 ohm to a high value).
【0010】図2(c)は窓型の無給電励振素子6の1
例で平面図を示す。この場合の寸法は図2(c)に示す
通りである。また、破線で示すループ回路は図1(a)
のループアンテナ素子2を示し、無給電励振素子6との
相対位置を明らかにしている。図2(c)に示す形状の
無給電励振素子6を図1(b)の無給電励振素子4に示
す場所へ設置した場合のアンテナの定在波比特性を図3
(d)に示す。図3(d)から明らかな様に、この場合
はループ状励振素子の本来有していた特性インピーダン
スには変化は少ないが、共振周波数を大きく低い周波数
へ変化させていることがわかる。FIG. 2C shows a window type parasitic excitation element 1
A plan view is shown as an example. The dimensions in this case are as shown in FIG. The loop circuit shown by the broken line is shown in FIG.
The loop antenna element 2 is shown, and the relative position with the parasitic excitation element 6 is clarified. FIG. 3 shows the standing wave ratio characteristic of the antenna when the parasitic excitation element 6 having the shape shown in FIG. 2C is installed at the place shown in the parasitic excitation element 4 of FIG. 1B.
It shows in (d). As is clear from FIG. 3D, in this case, the characteristic impedance originally possessed by the loop-shaped excitation element is little changed, but the resonance frequency is changed to a large low frequency.
【0011】以上説明した様に無給電励振素子の存在は
ループ状励振素子が本来有していた電気特性を種々に変
化させることが明らかになったが、無給電励振素子を設
置する複数の誘電体板の存在、及びループ状励振素子と
無給電励振素子との相対関係により、下記の特性を持た
せることが可能になる。 図1(b)に示す誘電体板10の前方へ更に同種の
誘電体板を複数設置し、各誘電体板上に図1(b)に示
す無給電励振素子を被着・形成させると、アンテナとし
て本来有していた水平面内指向性を更に大きくする事が
可能となる。また、誘電体板1の後方へ前方と同種の誘
電体板を複数設置し、各誘電体板上に図1(b)に示す
無給電励振素子を被着・形成させると、前後両方向に大
きな指向特性を有するアンテナを得ることが出来る。As described above, it has been clarified that the presence of the parasitic excitation element changes variously the electric characteristics originally possessed by the loop-shaped excitation element. The presence of the body plate and the relative relationship between the loop-shaped excitation element and the parasitic excitation element makes it possible to provide the following characteristics. If a plurality of dielectric plates of the same kind are further installed in front of the dielectric plate 10 shown in FIG. 1 (b), and the parasitic excitation element shown in FIG. 1 (b) is deposited / formed on each dielectric plate, It is possible to further increase the directivity in the horizontal plane originally possessed by the antenna. Further, when a plurality of dielectric plates of the same type as the front are installed behind the dielectric plate 1 and the parasitic excitation element shown in FIG. 1 (b) is attached / formed on each dielectric plate, a large front and rear direction is obtained. An antenna having directional characteristics can be obtained.
【0012】 図1(b)に示す誘電体板10に設け
る無給電励振素子の位置を下方に若干下げる、すなわ
ち、平面図で書くと無給電励振素子の中心がループ状励
振素子の中心より下方に来る様に設置すると、アンテナ
の有する主指向特性を下方に向けられることが実験的に
確かめられた。この結果、アンテナの有する主指向特性
を上方に向けたい場合は図1(b)に示す誘電体板10
に設ける無給電励振素子の位置を上方に若干上げれば良
い事になる。The position of the parasitic excitation element provided on the dielectric plate 10 shown in FIG. 1B is slightly lowered, that is, in the plan view, the center of the parasitic excitation element is below the center of the loop-shaped excitation element. It has been experimentally confirmed that the main directional characteristics of the antenna can be directed downward when the antenna is installed so as to come to. As a result, when it is desired to direct the main directional characteristics of the antenna upward, the dielectric plate 10 shown in FIG.
It suffices to slightly raise the position of the parasitic excitation element provided in the above.
【0013】[0013]
【発明の効果】本発明アンテナはアンテナ固有の特性イ
ンピーダンスや共振周波数さらには指向性を変化させる
ことが出来るから、アンテナと給電線との整合の容易さ
をはじめ、アンテナ設計の容易化、アンテナの小形化等
を容易に進めることが可能となる。したがって、本発明
の効果は大きい。Since the antenna of the present invention can change the characteristic impedance, resonance frequency and directivity peculiar to the antenna, it is easy to match the antenna and the feed line, and the antenna design is facilitated. It becomes possible to easily miniaturize. Therefore, the effect of the present invention is great.
【図1】 本発明の一実施例を示す図である。FIG. 1 is a diagram showing an embodiment of the present invention.
【図2】 本発明の他の実施例を示す図である。FIG. 2 is a diagram showing another embodiment of the present invention.
【図3】 本発明アンテナの諸特性を示す図である。FIG. 3 is a diagram showing various characteristics of the antenna of the present invention.
1 誘電体板 2 励振素子 3 給電線 4〜6 無給電励振素子の形状 10 誘電体板 DESCRIPTION OF SYMBOLS 1 Dielectric plate 2 Excitation element 3 Feed line 4-6 Shape of parasitic excitation element 10 Dielectric plate
Claims (4)
着させた金属皮膜をループ状回路に形成した励振素子
と、前記誘電体板の前方もしくは後方、或いは前後両方
に適当な間隔を隔てて平行に別の誘電体板群を設け、そ
の表面に、金属皮膜を円形、矩形或いはループ状回路状
等の形状で被着・形成した無給電励振素子群とがあり、
前記励振素子より発射される電磁波が前記無給電励振素
子群により影響を受ける様に構成されていることを特徴
とするマイクロストリップアンテナ。1. An exciter element having a loop-shaped circuit formed with a metal film adhered to the surface of a dielectric plate that is thinner than the emission wavelength, and an appropriate distance in front of or behind the dielectric plate, or both before and after. There is another group of dielectric plates parallel to each other, and there is a parasitic excitation element group in which a metal film is attached / formed on the surface in a circular, rectangular or loop-shaped circuit shape,
A microstrip antenna characterized in that an electromagnetic wave emitted from the excitation element is influenced by the parasitic excitation element group.
着させた金属皮膜をループ状回路に形成した励振素子
と、前記誘電体板の前方もしくは後方、或いは前後両方
に適当な間隔を隔てて平行に別の誘電体板群を設け、そ
の表面に、金属皮膜を円形、矩形或いはループ状回路状
等の形状で被着・形成した無給電励振素子群とがあり、
前記励振素子より発射される電磁波が前記無給電励振素
子群により影響を受ける様に構成することにより前記ル
ープ状回路が本来有していた指向特性を変更可能とした
マイクロストリップアンテナ。2. An exciter element having a loop-shaped circuit formed of a metal film adhered to the surface of a dielectric plate that is thinner than the emission wavelength, and an appropriate distance in front of or behind the dielectric plate, or both before and after. There is another group of dielectric plates parallel to each other, and there is a parasitic excitation element group in which a metal film is attached / formed on the surface in a circular, rectangular or loop-shaped circuit shape,
A microstrip antenna capable of changing the directional characteristic originally possessed by the loop circuit by configuring the electromagnetic wave emitted from the exciting element to be influenced by the parasitic exciting element group.
着させた金属皮膜をループ状回路に形成した励振素子
と、前記誘電体板の前方もしくは後方、或いは前後両方
に適当な間隔を隔てて平行に別の誘電体板群を設け、そ
の表面に、金属皮膜を円形、矩形或いはループ状回路状
等の形状で被着・形成した無給電励振素子とがあり、前
記励振素子より発射される電磁波の一部が前記無給電励
振素子により影響を受ける様に構成することにより前記
ループ状回路が本来有していた特性インピーダンスを変
更可能としたマイクロストリップアンテナ。3. An exciting element having a loop-shaped circuit formed with a metal film adhered to the surface of a dielectric plate that is thinner than the emission wavelength, and an appropriate distance in front of or behind the dielectric plate, or both before and after. There is another group of dielectric plates parallel to each other, and there is a parasitic excitation element on the surface of which a metal film is adhered / formed in a circular, rectangular or loop-like circuit shape. A microstrip antenna capable of changing the characteristic impedance originally possessed by the loop circuit by configuring such that a part of the emitted electromagnetic wave is affected by the parasitic excitation element.
被着させた金属皮膜をループ状回路に形成した励振素子
と、前記誘電体板群の前方もしくは後方、或いは前後両
方に適当な間隔を隔てて平行に別の誘電体板群を設け、
その表面に、金属皮膜を円形、矩形或いはループ状回路
状等の形状で被着・形成した無給電励振素子とがあり、
前記励振素子より発射される電磁波の一部が前記無給電
励振素子により影響を受ける様に構成することにより前
記ループ状回路が本来有していた共振周波数を変更可能
としたマイクロストリップアンテナ。4. An exciter element having a loop-shaped circuit formed of a metal film adhered to the surface of a dielectric plate group, which is thinner than the emission wavelength, and the front and rear or front and rear of the dielectric plate group. Another dielectric plate group is provided in parallel with a certain interval,
There is a parasitic excitation element on the surface of which a metal film is deposited / formed in a circular, rectangular or loop-shaped circuit shape,
A microstrip antenna capable of changing a resonance frequency originally possessed by the loop-shaped circuit by configuring a part of electromagnetic waves emitted from the excitation element to be influenced by the parasitic excitation element.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7339817A JPH09148838A (en) | 1995-11-22 | 1995-11-22 | Micro strip antenna |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7339817A JPH09148838A (en) | 1995-11-22 | 1995-11-22 | Micro strip antenna |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH09148838A true JPH09148838A (en) | 1997-06-06 |
Family
ID=18331106
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7339817A Pending JPH09148838A (en) | 1995-11-22 | 1995-11-22 | Micro strip antenna |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH09148838A (en) |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002118415A (en) * | 2000-10-05 | 2002-04-19 | Koku System Consultants:Kk | Doppler ultrashort wave omni-range antenna system |
JP2004266500A (en) * | 2003-02-28 | 2004-09-24 | Nippon Plast Co Ltd | Antenna |
US6856819B2 (en) | 2000-03-07 | 2005-02-15 | Nec Corporation | Portable wireless unit |
US7286098B2 (en) | 2003-08-29 | 2007-10-23 | Fujitsu Ten Limited | Circular polarization antenna and composite antenna including this antenna |
US7408524B2 (en) | 2005-03-29 | 2008-08-05 | Fujitsu Ten Limited | Loop antenna |
JP2009218967A (en) * | 2008-03-11 | 2009-09-24 | Nec Tokin Corp | Impedance matching method of antenna system, and antenna system |
JP2009278440A (en) * | 2008-05-15 | 2009-11-26 | Tokai Rika Co Ltd | Portable unit |
US7898488B2 (en) | 2007-01-12 | 2011-03-01 | Mitsubishi Electric Corporation | Antenna apparatus |
US20120013513A1 (en) * | 2010-07-13 | 2012-01-19 | Canon Kabushiki Kaisha | Loop antenna |
CN104362424A (en) * | 2008-11-17 | 2015-02-18 | 株式会社村田制作所 | Wireless communication device |
WO2019159903A1 (en) * | 2018-02-13 | 2019-08-22 | 株式会社村田製作所 | Antenna device and electronic apparatus |
-
1995
- 1995-11-22 JP JP7339817A patent/JPH09148838A/en active Pending
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6856819B2 (en) | 2000-03-07 | 2005-02-15 | Nec Corporation | Portable wireless unit |
JP2002118415A (en) * | 2000-10-05 | 2002-04-19 | Koku System Consultants:Kk | Doppler ultrashort wave omni-range antenna system |
JP2004266500A (en) * | 2003-02-28 | 2004-09-24 | Nippon Plast Co Ltd | Antenna |
US7286098B2 (en) | 2003-08-29 | 2007-10-23 | Fujitsu Ten Limited | Circular polarization antenna and composite antenna including this antenna |
US7408524B2 (en) | 2005-03-29 | 2008-08-05 | Fujitsu Ten Limited | Loop antenna |
US7898488B2 (en) | 2007-01-12 | 2011-03-01 | Mitsubishi Electric Corporation | Antenna apparatus |
JP2009218967A (en) * | 2008-03-11 | 2009-09-24 | Nec Tokin Corp | Impedance matching method of antenna system, and antenna system |
JP2009278440A (en) * | 2008-05-15 | 2009-11-26 | Tokai Rika Co Ltd | Portable unit |
CN104362424A (en) * | 2008-11-17 | 2015-02-18 | 株式会社村田制作所 | Wireless communication device |
US20120013513A1 (en) * | 2010-07-13 | 2012-01-19 | Canon Kabushiki Kaisha | Loop antenna |
US8686916B2 (en) | 2010-07-13 | 2014-04-01 | Canon Kabushiki Kaisha | Loop antenna |
WO2019159903A1 (en) * | 2018-02-13 | 2019-08-22 | 株式会社村田製作所 | Antenna device and electronic apparatus |
US10903557B2 (en) | 2018-02-13 | 2021-01-26 | Murata Manufacturing Co., Ltd. | Antenna device and electronic device |
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