JPWO2006098310A1 - Microstrip antenna - Google Patents
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- JPWO2006098310A1 JPWO2006098310A1 JP2007508148A JP2007508148A JPWO2006098310A1 JP WO2006098310 A1 JPWO2006098310 A1 JP WO2006098310A1 JP 2007508148 A JP2007508148 A JP 2007508148A JP 2007508148 A JP2007508148 A JP 2007508148A JP WO2006098310 A1 JPWO2006098310 A1 JP WO2006098310A1
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- conductor
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- electric circuit
- microstrip antenna
- dielectric substrate
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q23/00—Antennas with active circuits or circuit elements integrated within them or attached to them
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
Abstract
誘電体の基板と、その一方の面に設けられた接地導体と、他方の面に設けられ誘電体基板より小さな面積の放射導体と、接地導体及び放射導体のそれぞれに端子の接続される給電手段とを備えたマイクロストリップアンテナにおいて、放射導体の表面に、接地面を有する略平坦な電気回路部材を配設し、その電気回路部材の接地面を、放射導体に接続すると共に、電気回路部材のプラス端子を、放射導体に設けた孔を挿通させて放射導体には接することなく、誘電体基板を貫通させて、接地導体に接続する。これによって、電気回路部材がほぼ直接接続されて突出しても、その電気回路部材を障害とすることなく、いかなる物品にも安定して設置できるマイクロストリップアンテナを提供できる。A dielectric substrate, a ground conductor provided on one surface thereof, a radiating conductor provided on the other surface having a smaller area than the dielectric substrate, and a power feeding means having terminals connected to each of the ground conductor and the radiating conductor A substantially flat electric circuit member having a grounding surface is disposed on the surface of the radiation conductor, the grounding surface of the electric circuit member is connected to the radiation conductor, and the electric circuit member The positive terminal is inserted through the hole provided in the radiating conductor so as not to contact the radiating conductor, and is penetrated through the dielectric substrate and connected to the ground conductor. As a result, even if the electric circuit member is substantially directly connected and protrudes, it is possible to provide a microstrip antenna that can be stably installed on any article without causing the electric circuit member to be an obstacle.
Description
本発明は、マイクロストリップアンテナの構成に関する。
The present invention relates to a configuration of a microstrip antenna.
マイクロストリップアンテナには、アンテナの厚さが薄い、軽量である、構成が簡素である、円偏波を得やすい、利得が比較的高い、などの特徴がある。
このような特徴から、マイクロストリップアンテナは、自動車などに搭載する移動体局用アンテナや、衛星放送受信用アンテナ、衛星搭載用アンテナなどに幅広く使われている。The microstrip antenna has features such as a thin antenna, a light weight, a simple configuration, easy to obtain circular polarization, and a relatively high gain.
Because of these characteristics, microstrip antennas are widely used for mobile station antennas mounted on automobiles, satellite broadcast receiving antennas, satellite mounted antennas, and the like.
図１及び図２は、従来のマイクロストリップアンテナの概要を示す正面図及び側面断面図である。
平板状の誘電体の基板（１１）の一方の面には接地導体（１２）が貼設され、他方の面には、誘電体基板（１１）より小さな面積の放射導体（１３）が貼設されている。
これに無線ICチップなどの小型電気回路部材（２０）を、同軸ケーブル等を用いることなく直接接続する場合、電気回路部材（２０）は接地導体（１２）の側に配置し、電気回路部材（２０）のマイナス側接地面（２１）をマイクロストリップアンテナの接地導体（１２）に接続する。そして、接地面（２１）と対を成して電気信号やマイクロ波を伝送する電気回路部材（２０）のプラス端子（２２）は、接地導体（１２）に設けられた孔（１４）を挿通することで、接地導体（１２）には接触することなく、誘電体基板（１１）を貫通して、放射導体（１３）に接続する。1 and 2 are a front view and a side sectional view showing an outline of a conventional microstrip antenna.
A ground conductor (12) is attached to one surface of the flat dielectric substrate (11), and a radiation conductor (13) having a smaller area than the dielectric substrate (11) is attached to the other surface. Has been.
When a small electric circuit member (20) such as a wireless IC chip is directly connected to this without using a coaxial cable or the like, the electric circuit member (20) is disposed on the ground conductor (12) side, and the electric circuit member ( The negative ground plane (21) of 20) is connected to the ground conductor (12) of the microstrip antenna. And the plus terminal (22) of the electric circuit member (20) which transmits an electric signal and a microwave in a pair with the ground plane (21) is inserted through the hole (14) provided in the ground conductor (12). Thus, the dielectric substrate (11) is penetrated and connected to the radiating conductor (13) without contacting the ground conductor (12).
図３及び図４も同様に、従来のマイクロストリップアンテナの概要を示す正面図及び側面断面図である。
本例での電気回路部材（２０）は、接地面が絶縁されていて、図１で示したような接地面（２１）の代わりに接地端子（２３）が備わっている。
この場合も、上記例と同様に、電気回路部材（２０）は接地導体（１２）の側に配置される。そして、電気回路部材（２０）の接地端子（２３）がマイクロストリップアンテナの接地導体（１２）に接続される。Similarly, FIGS. 3 and 4 are a front view and a side sectional view showing an outline of a conventional microstrip antenna.
The electric circuit member (20) in this example is insulated from the ground plane, and has a ground terminal (23) instead of the ground plane (21) as shown in FIG.
Also in this case, the electric circuit member (20) is arranged on the ground conductor (12) side as in the above example. The ground terminal (23) of the electric circuit member (20) is connected to the ground conductor (12) of the microstrip antenna.
マイクロストリップアンテナは、放射導体（１３）側から電波を放射するので、物品に取り付ける場合は、接地導体（１２）が物品に面することになる。
そのため、従来技術によると、電気回路部材（２０）がほぼ直接接続されたマイクロストリップアンテナを設置する場合、電気回路部材（２０）が突出して障害となるため、金属等の堅い物品に設けることが困難になるという問題がある。Since the microstrip antenna radiates radio waves from the radiation conductor (13) side, the ground conductor (12) faces the article when attached to the article.
Therefore, according to the prior art, when installing a microstrip antenna to which the electric circuit member (20) is almost directly connected, the electric circuit member (20) protrudes and becomes an obstacle, so it can be provided on a hard article such as metal. There is a problem that it becomes difficult.
本件発明者は、マイクロストリップアンテナに関連して、特許文献１〜４などを開示している。
しかし、上記問題点については解決に至っていない。The present inventor discloses Patent Documents 1 to 4 and the like related to the microstrip antenna.
However, the above problems have not been solved.
そこで、本発明は、電気回路部材がほぼ直接接続されて突出しても、その電気回路部材を障害とすることなく、いかなる物品にも安定して設置できるマイクロストリップアンテナを提供することを課題とする。
Therefore, an object of the present invention is to provide a microstrip antenna that can be stably installed on any article without causing the electric circuit member to be an obstacle even if the electric circuit member protrudes by being directly connected. .
上記課題を解決するために、本発明のマイクロストリップアンテナは次の構成を備える。
すなわち、誘電体の基板と、その一方の面に設けられた接地導体と、他方の面に設けられ誘電体基板より小さな面積の放射導体と、接地導体及び放射導体のそれぞれに端子の接続される給電手段とを備えたマイクロストリップアンテナにおいて、放射導体の表面に、接地面を有する略平坦な電気回路部材を配設し、その電気回路部材の接地面を、放射導体に接続すると共に、電気回路部材のプラス端子を、放射導体に設けた孔を挿通させて放射導体には接することなく、誘電体基板を貫通させて、接地導体に接続することを特徴とする。In order to solve the above problems, the microstrip antenna of the present invention has the following configuration.
That is, a terminal is connected to each of the dielectric substrate, the ground conductor provided on one surface thereof, the radiation conductor provided on the other surface having a smaller area than the dielectric substrate, and the ground conductor and the radiation conductor. In a microstrip antenna provided with a power feeding means, a substantially flat electric circuit member having a ground plane is disposed on the surface of a radiation conductor, and the ground plane of the electric circuit member is connected to the radiation conductor and an electric circuit The positive terminal of the member is inserted through a hole provided in the radiating conductor and is not in contact with the radiating conductor, but is penetrated through the dielectric substrate and connected to the ground conductor.
また、誘電体の基板と、その一方の面に設けられた接地導体と、他方の面に設けられ誘電体基板より小さな面積の放射導体と、接地導体及び放射導体のそれぞれに端子の接続される給電手段とを備えたマイクロストリップアンテナにおいて、放射導体の表面に、接地面を有さない略平坦な電気回路部材を放射導体とは絶縁させて配設し、その電気回路部材の接地端子を、放射導体に接続すると共に、電気回路部材のプラス端子を、放射導体に設けた孔を挿通させて放射導体には接することなく、誘電体基板を貫通させて、接地導体に接続してもよい。 Also, terminals are connected to the dielectric substrate, the ground conductor provided on one surface thereof, the radiation conductor provided on the other surface having a smaller area than the dielectric substrate, and the ground conductor and the radiation conductor, respectively. In a microstrip antenna provided with a power feeding means, a substantially flat electric circuit member having no grounding surface is disposed on the surface of the radiation conductor so as to be insulated from the radiation conductor, and a ground terminal of the electric circuit member is provided. In addition to connecting to the radiation conductor, the positive terminal of the electric circuit member may be connected to the ground conductor through the dielectric substrate without passing through the hole provided in the radiation conductor and contacting the radiation conductor.
誘電体の基板と、その一方の面に設けられた接地導体と、他方の面に設けられ誘電体基板より小さな面積の放射導体と、接地導体及び放射導体のそれぞれに端子の接続される給電手段とを備えたマイクロストリップアンテナにおいて、放射導体の表面に、接地面を有さない略平坦な電気回路部材を放射導体とは絶縁させて配設し、その電気回路部材のプラス端子を、放射導体に接続すると共に、電気回路部材の接地端子を、放射導体に設けた孔を挿通させて放射導体には接することなく、誘電体基板を貫通させて、接地導体に接続してもよい。 A dielectric substrate, a grounding conductor provided on one surface thereof, a radiation conductor provided on the other surface having a smaller area than the dielectric substrate, and a power feeding means having terminals connected to the grounding conductor and the radiation conductor, respectively. A substantially flat electric circuit member having no grounding surface is insulated from the radiating conductor on the surface of the radiating conductor, and the plus terminal of the electric circuit member is connected to the radiating conductor. In addition, the ground terminal of the electric circuit member may be connected to the ground conductor through the dielectric substrate without passing through the hole provided in the radiation conductor and contacting the radiation conductor.
ここで、電気回路部材の端子を挿通させる放射導体の孔は、マイクロストリップアンテナのインピーダンスが、電気回路部材のインピーダンスと略一致する位置が好ましい。 Here, the hole of the radiation conductor through which the terminal of the electric circuit member is inserted is preferably at a position where the impedance of the microstrip antenna substantially matches the impedance of the electric circuit member.
電気回路部材に、マイクロストリップアンテナのインピーダンスと電気回路部材のインピーダンスとを整合させる整合回路を接続させてもよい。
すなわち、電気回路部材に、インピーダンスを低下させる整合回路を接続させて、電気回路部材のインピーダンスが放射導体の縁におけるアンテナのインピーダンスよりも大きい場合であっても、マイクロストリップアンテナと電気回路部材のインピーダンスとを等しくできるようにしてもよい。また、電気回路部材のインピーダンスが放射導体の縁におけるアンテナのインピーダンスより小さい場合でも、アンテナの所定の給電点におけるインピーダンスに合わせるために整合回路を設けてもよい。A matching circuit that matches the impedance of the microstrip antenna and the impedance of the electric circuit member may be connected to the electric circuit member.
That is, even when a matching circuit for reducing impedance is connected to the electric circuit member and the impedance of the electric circuit member is larger than the impedance of the antenna at the edge of the radiation conductor, the impedance of the microstrip antenna and the electric circuit member May be made equal. Further, even when the impedance of the electric circuit member is smaller than the impedance of the antenna at the edge of the radiation conductor, a matching circuit may be provided to match the impedance at a predetermined feeding point of the antenna.
誘電体基板を布地にすると共に、接地導体及び放射導体を導電性布として、布製のマイクロストリップアンテナに適用してもよい。 The dielectric substrate may be used as a cloth, and the ground conductor and the radiating conductor may be used as a conductive cloth and applied to a cloth microstrip antenna.
同様に、誘電体基板をフェルト生地にすると共に、接地導体及び放射導体を導電性布として、布製のマイクロストリップアンテナに適用してもよい。
Similarly, the dielectric substrate may be made of felt cloth, and the ground conductor and the radiating conductor may be used as a conductive cloth and applied to a cloth microstrip antenna.
本発明のマイクロストリップアンテナによると、放射導体の側に電気回路部材を配設するので、電気回路部材が突出しても、その電気回路部材を障害とすることなく、いかなる物品にも安定して設置することが可能である。
According to the microstrip antenna of the present invention, since the electric circuit member is disposed on the radiation conductor side, even if the electric circuit member protrudes, it can be stably installed on any article without causing the electric circuit member to be an obstacle. Is possible.
以下に、図面を基に本発明の実施形態を説明する。
なお、実施形態は、本件発明者による特許文献１〜４などの従来公知の技術を援用でき、構成の細部は本発明の趣旨から逸脱しない限り適宜設計変形可能である。Embodiments of the present invention will be described below with reference to the drawings.
The embodiments can use conventionally known techniques such as Patent Documents 1 to 4 by the present inventor, and the details of the configuration can be appropriately modified without departing from the gist of the present invention.
図５及び図６は、本発明によるマイクロストリップアンテナの一実施例を示す正面図及び側面断面図である。
金属板から成る放射導体（１３）の面積は、金属板から成る接地導体（１２）よりも小さいものである。また、接地導体（１２）と誘電体基板（１１）は、通常同じ形状かつ同じ面積であるが、必ずしも同一にしなければならないものではない。
誘電体基板（１１）と、接地導体（１２）、放射導体（１３）の形状は、それぞれ平板状を基本とし、円盤状に限らず、凸多角形の薄板状などでもよい。円盤状の誘電体基板（１１）及び接地導体（１２）に、四角の放射導体（１３）を組み合わせてもよいし、四角の誘電体基板（１１）及び接地導体（１２）に、円盤状の放射導体（１３）を組み合わせたりしてもよい。図示の例では、放射導体（１３）が円盤状で、誘電体基板（１１）と接地導体（１２）が四角の平板状になっている。5 and 6 are a front view and a side sectional view showing an embodiment of the microstrip antenna according to the present invention.
The area of the radiation conductor (13) made of a metal plate is smaller than that of the ground conductor (12) made of a metal plate. The ground conductor (12) and the dielectric substrate (11) usually have the same shape and the same area, but they do not necessarily have to be the same.
The shapes of the dielectric substrate (11), the ground conductor (12), and the radiation conductor (13) are basically flat, and are not limited to a disc shape but may be a thin plate shape of a convex polygon. A square radiating conductor (13) may be combined with the disk-shaped dielectric substrate (11) and the ground conductor (12), or a disk-shaped dielectric substrate (11) and a ground conductor (12) A radiation conductor (13) may be combined. In the illustrated example, the radiation conductor (13) has a disk shape, and the dielectric substrate (11) and the ground conductor (12) have a square flat plate shape.
誘電体基板（１１）と接地導体（１２）とを面が一致するように接合し、放射導体（１３）は、誘電体基板（１２）からはみ出さないように、通常は誘電体基板（１１）の中央部に接合する。 The dielectric substrate (11) and the ground conductor (12) are joined so that their surfaces coincide with each other, and the radiating conductor (13) is usually in the dielectric substrate (11) so as not to protrude from the dielectric substrate (12). ).
接合方法は、接着剤を用いた従来公知の接着でもよいが、接着剤を使用すると比誘電率の変化が生じる。それを抑止するためには、誘電体基板（１１）の両面に、接地導体（１２）及び放射導体（１３）に用いる金属板によるエッチング処理を施し、その金属板の一部を剥離する方法を用いる。結果的には、誘電体基板（１１）に接地導体（１２）及び放射導体（１３）を接着したのと同じことになる。
また、エッチング処理を施す方法によると、剥離後に残った金属板部分が放射導体になり、その放射導体の大きさによって、マイクロストリップアンテナの共振周波数が左右される。そのため、剥離する金属板部分を調整することで、アンテナ周波数を調整することができる。The bonding method may be a conventionally known bonding method using an adhesive, but if an adhesive is used, the relative dielectric constant changes. In order to suppress this, an etching process using a metal plate used for the ground conductor (12) and the radiation conductor (13) is performed on both surfaces of the dielectric substrate (11), and a part of the metal plate is peeled off. Use. As a result, the grounding conductor (12) and the radiation conductor (13) are bonded to the dielectric substrate (11).
Further, according to the etching method, the metal plate portion remaining after peeling becomes a radiation conductor, and the resonance frequency of the microstrip antenna depends on the size of the radiation conductor. Therefore, the antenna frequency can be adjusted by adjusting the metal plate portion to be peeled off.
接地導体（１２）や放射導体（１３）を構成する金属板は、電気抵抗の小さな金属を用いることが好ましい。通常は、比較的安価で電気抵抗が十分に小さい銅が用いられる。
接地導体（１２）と放射導体（１３）に異なる金属を用いてもよいが、通常は同じ金属を用いる。The metal plate constituting the ground conductor (12) and the radiating conductor (13) is preferably a metal having a small electric resistance. Usually, copper is used which is relatively inexpensive and has a sufficiently small electric resistance.
Different metals may be used for the ground conductor (12) and the radiating conductor (13), but usually the same metal is used.
誘電体基板（１１）としては、テフロン（登録商標）、ガラスエポキシ、ポリエチレン、セラミック誘電体などが利用できるが、比誘電率が大きいほど誘電体内部での電波の波長が短縮されるので、マイクロストリップアンテナの小型化に寄与することになる。設計条件によっては、比誘電率の十分小さな絶縁体を用いることもありうる。 As the dielectric substrate (11), Teflon (registered trademark), glass epoxy, polyethylene, ceramic dielectric, and the like can be used. However, the greater the relative dielectric constant, the shorter the wavelength of radio waves inside the dielectric, This contributes to miniaturization of the strip antenna. Depending on design conditions, an insulator having a sufficiently small relative dielectric constant may be used.
誘電体基板（１１）を布地またはフェルト生地で構成し、接地導体（１２）及び放射導体（１３）を導電性布で構成すると、布製のマイクロストリップアンテナが得られる。 When the dielectric substrate (11) is made of cloth or felt cloth, and the ground conductor (12) and the radiating conductor (13) are made of conductive cloth, a cloth microstrip antenna can be obtained.
ドリルや錐などの工作器具を用いて、接地導体（１２）及び放射導体（１３）を接合した誘電体基板（１１）に、細い貫通孔（１４）を垂直に１つ設ける。
放射導体（１３）における孔（１４）は、剥離等によって径を大きめにしておく。Using a tool such as a drill or a cone, one thin through hole (14) is vertically provided in the dielectric substrate (11) to which the ground conductor (12) and the radiation conductor (13) are joined.
The hole (14) in the radiation conductor (13) has a large diameter by peeling or the like.
孔（１４）の位置は、マイクロストリップアンテナにおける給電点となるので、そのインピーダンスが、電気回路部材（２０）のインピーダンスとほぼ等しくなる位置が好ましい。
一般に、マイクロストリップアンテナの放射導体（１３）が円盤形の場合は、給電点が放射導体（１３）の中心から外側に向かうに従ってインピーダンスが高くなる。理論的には、中心でのインピーダンスは0Ωであり、放射導体（１３）の縁では数百Ωとなる。
マイクロストリップアンテナは５０Ωの同軸ケーブルから給電されることが多いので、例えば、インピーダンスが約５０Ωになる位置であれば、放射導体（１２）の中心から半径の約１／３にあたる位置が挙げられる。Since the position of the hole (14) is a feeding point in the microstrip antenna, the position where the impedance is substantially equal to the impedance of the electric circuit member (20) is preferable.
In general, when the radiating conductor (13) of the microstrip antenna has a disk shape, the impedance increases as the feeding point goes from the center of the radiating conductor (13) to the outside. Theoretically, the impedance at the center is 0Ω, and several hundred Ω at the edge of the radiation conductor (13).
Since the microstrip antenna is often fed from a 50Ω coaxial cable, for example, when the impedance is about 50Ω, a position corresponding to about 1/3 of the radius from the center of the radiation conductor (12) can be mentioned.
放射導体（１３）の表面に、無線ICチップなど所望の略平坦な電気回路部材（２０）を配設する。
図示の例の電気回路部材（２０）には、接地面（２１）が備わっている。その接地面（２１）を、前記と同様の方法によって放射導体（１３）に接合することで、電気回路部材（２０）と放射導体（１３）とを電気的に接続する。
電気回路部材（２０）のプラス端子（２２）は、放射導体（１３）に設けた孔（１４）を挿通させて放射導体（１３）には接することなく、誘電体基板（１１）を貫通させて、接地導体（１２）に接続する。孔（１４）において、誘電体基板（１１）及び接地導体（１２）は、プラス端子（２２）と接触してもかまわない。A desired substantially flat electric circuit member (20) such as a wireless IC chip is disposed on the surface of the radiation conductor (13).
The electric circuit member (20) in the illustrated example is provided with a ground plane (21). The electric circuit member (20) and the radiation conductor (13) are electrically connected by joining the ground plane (21) to the radiation conductor (13) by the same method as described above.
The positive terminal (22) of the electric circuit member (20) is inserted through the hole (14) provided in the radiating conductor (13) and penetrates the dielectric substrate (11) without contacting the radiating conductor (13). To the ground conductor (12). In the hole (14), the dielectric substrate (11) and the ground conductor (12) may be in contact with the positive terminal (22).
プラス端子（２２）の長さは、その端部が、接地導体（１２）から少し突出する程度の長さが好ましい。その突出した端部と孔（１４）とは、はんだ付け等によって被覆する。
プラス端子（２２）と接地導体（１２）とが通電可能な状態で接続されるならば、はんだ付け以外の方法でもよい。例えば、接地導体（１２）と同じ材質の金属でできた蓋状被覆物を、プラス端子（２２）及び接地導体（１２）に接触するように取り付けるなどの固着方法を用いてもよい。The length of the plus terminal (22) is preferably such that its end part slightly protrudes from the ground conductor (12). The protruding end and the hole (14) are covered by soldering or the like.
Any method other than soldering may be used as long as the positive terminal (22) and the ground conductor (12) are connected in an energized state. For example, a fixing method such as attaching a lid-like covering made of a metal of the same material as the ground conductor (12) so as to be in contact with the plus terminal (22) and the ground conductor (12) may be used.
以上のような構成のマイクロストリップアンテナにおいて、放射導体（１３）と接地導体（１２）との間に電圧をかけると、放射導体（１３）の縁部付近に漏れ電界が励起され、それから放射導体（１３）の側の空間に向けて球面波の電波が放射されることになる。 In the microstrip antenna configured as described above, when a voltage is applied between the radiating conductor (13) and the ground conductor (12), a leakage electric field is excited in the vicinity of the edge of the radiating conductor (13). A spherical wave radio wave is emitted toward the space on the side of (13).
本発明では、マイクロストリップアンテナの特性について検討を行ない、上述のように従来技術とは逆に、電気回路部材（２０）は放射導体（１３）の側に配置し、電気回路部材（２０）のプラス端子（２２）は、誘電体基板（１１）を貫通させて接地導体（１２）に接続した。
マイクロストリップアンテナでは、放射導体（１３）の面上に、そこからはみ出さない程度の略平面的な部材を配設しても、アンテナの放射特性に大きな影響はない。
また、プラス端子（２２）を接地導体（１２）に接続し、接地面（２１）或いは接地端子を放射導体（１３）に接続しても、放射特性に大きな影響はない。
この２点を活用して、本発明では上述の構成を採用した。In the present invention, the characteristics of the microstrip antenna are examined. As described above, the electric circuit member (20) is disposed on the side of the radiating conductor (13), and the electric circuit member (20) The positive terminal (22) was connected to the ground conductor (12) through the dielectric substrate (11).
In the microstrip antenna, even if a substantially planar member that does not protrude from the surface of the radiation conductor (13) is disposed, the radiation characteristics of the antenna are not greatly affected.
Further, even if the plus terminal (22) is connected to the ground conductor (12) and the ground plane (21) or the ground terminal is connected to the radiation conductor (13), the radiation characteristics are not greatly affected.
Utilizing these two points, the present invention adopts the above-described configuration.
図７及び図８は、別実施例を示す正面図及び側面断面図である。
本例での電気回路部材（２０）は、接地面が絶縁されていて、図５で示したような接地面（２１）の代わりに接地端子（２３）が備わっている。
この場合も、電気回路部材（２０）は放射導体（１３）の側に配置し、電気回路部材（２０）の接地端子（２３）は放射導体（１３）に接続し、電気回路部材（２０）のプラス端子（２２）は、誘電体基板（１１）を貫通させて接地導体（１２）に接続することによって、アンテナの放射特性を損なうことなく、また、突出した電気回路部材（２０）を障害とすることなく、いかなる物品にも安定して設置することができる。7 and 8 are a front view and a side sectional view showing another embodiment.
The electric circuit member (20) in this example is insulated from the ground plane, and has a ground terminal (23) instead of the ground plane (21) as shown in FIG.
Also in this case, the electric circuit member (20) is disposed on the side of the radiating conductor (13), the ground terminal (23) of the electric circuit member (20) is connected to the radiating conductor (13), and the electric circuit member (20). The positive terminal (22) of the first electrode penetrates the dielectric substrate (11) and is connected to the ground conductor (12), thereby impairing the protruding electric circuit member (20) without impairing the radiation characteristics of the antenna. Therefore, it can be stably installed on any article.
図９及び図１０も、別実施例を示す正面図及び側面断面図である。
本例では、電気回路部材（２０）の接地端子（２３）が、誘電体基板（１１）を貫通し接地導体（１２）に接続され、プラス端子（２２）が放射導体（１３）に接続されている。
この場合も、電気回路部材（２０）は放射導体（１３）の側に配置されるので、アンテナの放射特性を損なうことなく、また、突出した電気回路部材（２０）を障害とすることなく、いかなる物品にも安定して設置することができる。9 and 10 are also a front view and a side sectional view showing another embodiment.
In this example, the ground terminal (23) of the electric circuit member (20) penetrates the dielectric substrate (11) and is connected to the ground conductor (12), and the plus terminal (22) is connected to the radiation conductor (13). ing.
Also in this case, since the electric circuit member (20) is disposed on the side of the radiation conductor (13), the radiation characteristics of the antenna are not impaired, and the protruding electric circuit member (20) is not obstructed. It can be stably installed on any article.
図１１及び図１２も、別実施例を示す正面図及び側面断面図である。
本例では、図５及び図６で示した実施例に対して、絶縁モールド（２４）が付加されている。
絶縁モールド（２４）は、放射導体（１３）の上の電気回路部材（２０）を、その端子も含めて、シリコン等でモールドを施す。
他の実施例に対しても同様に、絶縁モールド（２４）を施すことができる。FIG.11 and FIG.12 is also the front view and side sectional drawing which show another Example.
In this example, an insulating mold (24) is added to the embodiment shown in FIGS.
The insulating mold (24) molds the electric circuit member (20) on the radiation conductor (13), including its terminals, with silicon or the like.
Similarly, the insulating mold (24) can be applied to the other embodiments.
図１３及び図１４も、別実施例を示す正面図及び側面断面図である。
本例では、整合回路部材（２５）が付加されている。
電気回路部材（２０）のインピーダンスが放射導体（１３）の縁におけるアンテナのインピーダンスよりも大きい場合は、電気回路部材（２０）のインピーダンスを低下させてアンテナ側のインピーダンスと合わせるための整合回路部材（２５）を設ける。
また、電気回路部材（２０）のインピーダンスが放射導体（１３）の縁におけるアンテナのインピーダンスより小さい場合でも、アンテナの所定の給電点におけるインピーダンスに合わせるために整合回路部材（２５）を設けることもある。
図示の例では、整合回路部材（２５）は電気回路部材（２０）の下に配置し、両者は電気的に接続してある。そして、整合回路部材（２５）の接地面（２６）が、放射導体（１３）に接続されている。
他の実施例に対しても同様に、整合回路部材（２５）を設けることができる。
13 and 14 are also a front view and a side sectional view showing another embodiment.
In this example, a matching circuit member (25) is added.
When the impedance of the electric circuit member (20) is larger than the impedance of the antenna at the edge of the radiating conductor (13), the matching circuit member for reducing the impedance of the electric circuit member (20) to match the impedance on the antenna side ( 25).
Further, even when the impedance of the electric circuit member (20) is smaller than the impedance of the antenna at the edge of the radiation conductor (13), a matching circuit member (25) may be provided to match the impedance at a predetermined feeding point of the antenna. .
In the illustrated example, the matching circuit member (25) is disposed under the electric circuit member (20), and both are electrically connected. The ground plane (26) of the matching circuit member (25) is connected to the radiation conductor (13).
Similarly, a matching circuit member (25) can be provided for the other embodiments.
本発明のマイクロストリップアンテナは、アンテナの放射特性を損なうなどの不利益を派生することなく、金属など堅い物品にも安定して設置することができので、用途が広がり産業上利用価値の高い発明である。
The microstrip antenna of the present invention can be stably installed on a hard article such as metal without deteriorating the radiation characteristics of the antenna, etc. It is.
Claims (7)
放射導体の表面に、接地面を有する略平坦な電気回路部材を配設し、
その電気回路部材の接地面は、放射導体に接続すると共に、
電気回路部材のプラス端子は、放射導体に設けた孔を挿通させて放射導体には接することなく、誘電体基板を貫通させて、接地導体に接続する
ことを特徴とするマイクロストリップアンテナ。
A dielectric substrate, a grounding conductor provided on one surface thereof, a radiation conductor provided on the other surface having a smaller area than the dielectric substrate, and a power feeding means having terminals connected to the grounding conductor and the radiation conductor, respectively. In a microstrip antenna with
A substantially flat electric circuit member having a ground plane is disposed on the surface of the radiation conductor,
The ground plane of the electric circuit member is connected to the radiation conductor,
A microstrip antenna characterized in that the positive terminal of the electric circuit member is inserted through a hole provided in the radiating conductor so as not to contact the radiating conductor but penetrates the dielectric substrate and is connected to the ground conductor.
放射導体の表面に、接地面を有さない略平坦な電気回路部材を放射導体とは絶縁させて配設し、
その電気回路部材の接地端子は、放射導体に接続すると共に、
電気回路部材のプラス端子は、放射導体に設けた孔を挿通させて放射導体には接することなく、誘電体基板を貫通させて、接地導体に接続する
ことを特徴とするマイクロストリップアンテナ。
A dielectric substrate, a grounding conductor provided on one surface thereof, a radiation conductor provided on the other surface having a smaller area than the dielectric substrate, and a power feeding means having terminals connected to the grounding conductor and the radiation conductor, respectively. In a microstrip antenna with
On the surface of the radiation conductor, a substantially flat electric circuit member having no grounding surface is insulated from the radiation conductor and disposed.
The ground terminal of the electric circuit member is connected to the radiation conductor, and
A microstrip antenna characterized in that the positive terminal of the electric circuit member is inserted through a hole provided in the radiating conductor so as not to contact the radiating conductor but penetrates the dielectric substrate and is connected to the ground conductor.
放射導体の表面に、接地面を有さない略平坦な電気回路部材を放射導体とは絶縁させて配設し、
その電気回路部材のプラス端子は、放射導体に接続すると共に、
電気回路部材の接地端子は、放射導体に設けた孔を挿通させて放射導体には接することなく、誘電体基板を貫通させて、接地導体に接続する
ことを特徴とするマイクロストリップアンテナ。
A dielectric substrate, a grounding conductor provided on one surface thereof, a radiation conductor provided on the other surface having a smaller area than the dielectric substrate, and a power feeding means having terminals connected to the grounding conductor and the radiation conductor, respectively. In a microstrip antenna with
On the surface of the radiation conductor, a substantially flat electric circuit member having no grounding surface is insulated from the radiation conductor and disposed.
The positive terminal of the electric circuit member is connected to the radiation conductor, and
A microstrip antenna, wherein a ground terminal of an electric circuit member is inserted through a hole provided in a radiating conductor so as not to contact the radiating conductor but penetrates a dielectric substrate and is connected to the ground conductor.
マイクロストリップアンテナのインピーダンスが、電気回路部材のインピーダンスと略一致する位置に設ける
請求項１ないし３に記載のマイクロストリップアンテナ。
The hole of the radiation conductor through which the terminal of the electric circuit member is inserted is
The microstrip antenna according to any one of claims 1 to 3, wherein the microstrip antenna is provided at a position where the impedance of the microstrip antenna substantially matches the impedance of the electric circuit member.
請求項１ないし４に記載のマイクロストリップアンテナ。
The microstrip antenna according to any one of claims 1 to 4, wherein a matching circuit that matches the impedance of the microstrip antenna and the impedance of the electrical circuit member is connected to the electrical circuit member.
請求項１ないし５に記載のマイクロストリップアンテナ。
The microstrip antenna according to any one of claims 1 to 5, wherein the dielectric substrate is a cloth, and the ground conductor and the radiation conductor are a conductive cloth.
請求項１ないし５に記載のマイクロストリップアンテナ。
The microstrip antenna according to any one of claims 1 to 5, wherein the dielectric substrate is made of felt cloth, and the ground conductor and the radiation conductor are made of conductive cloth.
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| PCT/JP2006/304986 WO2006098310A1 (en) | 2005-03-14 | 2006-03-14 | Microstrip antenna |
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| JP3282388B2 (en) * | 1994-07-21 | 2002-05-13 | 株式会社村田製作所 | antenna |
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| US6018299A (en) * | 1998-06-09 | 2000-01-25 | Motorola, Inc. | Radio frequency identification tag having a printed antenna and method |
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| JP2003258539A (en) * | 2002-03-06 | 2003-09-12 | Communication Research Laboratory | Microstrip antenna |
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