JP6187749B2 - Antenna device - Google Patents
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- JP6187749B2 JP6187749B2 JP2013119168A JP2013119168A JP6187749B2 JP 6187749 B2 JP6187749 B2 JP 6187749B2 JP 2013119168 A JP2013119168 A JP 2013119168A JP 2013119168 A JP2013119168 A JP 2013119168A JP 6187749 B2 JP6187749 B2 JP 6187749B2
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Description
本発明は、複数共振化が可能なアンテナ装置に関する。 The present invention relates to an antenna device capable of making multiple resonances.
従来、通信機器において、アンテナの共振周波数を複共振化するためには、放射電極と誘電体ブロックとを備えたアンテナや、スイッチ，制御電圧源を用いたアンテナ装置が提案されている。
例えば、誘電体ブロックによる従来技術としては、特許文献１では、放射電極を樹脂成型体に形成し、さらに誘電体ブロックを接着剤で一体化することで高効率を得る複合アンテナが提案されている。
2. Description of the Related Art Conventionally, in communication equipment, an antenna device using a radiation electrode and a dielectric block, an antenna device using a switch, and a control voltage source has been proposed to make the resonance frequency of the antenna double resonant.
For example, as a conventional technique using a dielectric block, Patent Document 1 proposes a composite antenna that achieves high efficiency by forming a radiation electrode on a resin molded body and further integrating the dielectric block with an adhesive. .
また、スイッチ，制御電圧源を用いた従来技術としては、特許文献２では、第１の放射電極と、第２の放射電極と、第１の放射電極の途中部と第２の放射電極の基端部との間に介設され、第２の放射電極を第１の放射電極と電気的に接続又は切断させるためのスイッチと、を備えるアンテナ装置が提案されている。 Further, as a conventional technique using a switch and a control voltage source, in Patent Document 2, a first radiation electrode, a second radiation electrode, a middle portion of the first radiation electrode, and a base of the second radiation electrode are disclosed. An antenna device has been proposed that includes a switch that is interposed between the end portion and electrically connects or disconnects the second radiation electrode with the first radiation electrode.
しかしながら、上記従来の技術においても、以下の課題が残されている。
すなわち、特許文献１に記載のような誘電体ブロックによる技術では、放射電極を励振する誘電体ブロックを使用しており、機器毎に誘電体ブロック、放射電極パターン等の設計が必要になり、その設計条件によってアンテナ性能が劣化したり、不安定要素が増加する不都合がある。また、放射電極が樹脂成型体の表面に形成されているため、樹脂成型体上に放射電極パターンを設計する必要があり、実装する通信機器やその用途に応じて、アンテナ設計、金型設計が必要になり、大幅なコストの増大を招いてしまう。さらに、誘電体ブロックと樹脂成型体とを接着剤で一体化するので、接着剤のＱ値以外にも接着条件（接着剤の厚み、接着面積等）により、アンテナ性能が劣化したり、不安定要素が増加する不都合がある。
また、特許文献２に記載のようなスイッチ，制御電圧源を用いたアンテナ装置の場合、スイッチで共振周波数を切り替えを行うために、制御電圧源の構成やリアクタンス回路等が必要であり、アンテナ構成が機器毎に複雑化し、設計の自由度が無く、容易なアンテナ調整が困難であるという問題があった。
However, the following problems remain in the above-described conventional technology.
That is, in the technique using the dielectric block as described in Patent Document 1, a dielectric block that excites the radiation electrode is used, and it is necessary to design the dielectric block, the radiation electrode pattern, etc. for each device. Depending on design conditions, antenna performance may be degraded, and unstable elements may increase. In addition, since the radiation electrode is formed on the surface of the resin molding, it is necessary to design the radiation electrode pattern on the resin molding. Depending on the communication equipment to be mounted and its application, the antenna design and mold design This is necessary and causes a significant increase in cost. Furthermore, since the dielectric block and the molded resin are integrated with an adhesive, the antenna performance may be degraded or unstable depending on the adhesive conditions (adhesive thickness, adhesive area, etc.) in addition to the adhesive Q value. There is a disadvantage that the number of elements increases.
In addition, in the case of an antenna device using a switch and a control voltage source as described in Patent Document 2, a configuration of a control voltage source, a reactance circuit, and the like are required to switch the resonance frequency with the switch. However, there is a problem in that each device is complicated, there is no degree of freedom in design, and easy antenna adjustment is difficult.
本発明は、前述の課題に鑑みてなされたもので、複共振化した各共振周波数のフレキシブルな調整が可能で、用途や機器毎に応じたアンテナ性能を安価かつ容易に確保できると共に小型化や薄型化が可能なアンテナ装置を提供することを目的とする。 The present invention has been made in view of the above-mentioned problems, and can flexibly adjust each resonance frequency that has been double-resonated. It is an object of the present invention to provide an antenna device that can be thinned.
本発明は、前記課題を解決するために以下の構成を採用した。すなわち、第１の発明に係るアンテナ装置は、絶縁性の基板本体と、前記基板本体の表面にそれぞれ金属箔でパターン形成された第１エレメント及び第２エレメントとを備え、前記第１エレメントが、基端側に給電点が接続されると共に前記基板本体のいずれかの一辺に向けて延在する第１延在部と、前記第１延在部の先端に基端側が接続され前記第１延在部に直交する方向に延在する第２延在部と、前記第２延在部の先端に基端が接続され前記第１延在部に沿って前記第１延在部の基端側に向けて延在する第３延在部と、前記第３延在部の先端から前記第２延在部に沿って前記第２延在部の基端側に向けて延在する第４延在部と、前記第４延在部の先端に基端が接続され前記第１延在部に沿って延在し先端側がグランドに接続される第５延在部とを有し、前記第２エレメントが、前記第２延在部の基端から前記一辺に向けて延在する第６延在部と、前記第６延在部の先端に基端が接続され前記第２延在部に沿って前記第２延在部の先端側に向けて延在する第７延在部とを有していることを特徴とする。 The present invention employs the following configuration in order to solve the above problems. That is, the antenna device according to the first invention includes an insulating substrate body, and a first element and a second element each formed by patterning a metal foil on the surface of the substrate body, and the first element includes: A power feeding point is connected to the base end side, and a first extension portion extending toward one side of the substrate body, and a base end side is connected to a tip end of the first extension portion, and the first extension A second extension portion extending in a direction orthogonal to the extension portion; and a base end side of the first extension portion along the first extension portion with a base end connected to a tip end of the second extension portion And a fourth extension extending from the distal end of the third extension part along the second extension part toward the proximal end side of the second extension part. A fifth portion in which a proximal end is connected to the distal end of the existing portion and the fourth extending portion, extends along the first extending portion, and the distal end side is connected to the ground. A sixth end extending from the base end of the second extension part toward the one side, and a base end connected to the tip end of the sixth extension part. And a seventh extending portion extending toward the distal end side of the second extending portion along the second extending portion.
このアンテナ装置では、基板本体の表面にそれぞれ金属箔でパターン形成された上記の第１エレメント及び第２エレメントを備えているので、各エレメント間やグランドとの間の各浮遊容量とを効果的に利用することで、複共振化させることができる。
特に、第１エレメントが、上記の第２延在部と第３延在部と第４延在部とを有しているので、第１エレメントが折り返して延在することで第７延在部との間の浮遊容量が大きくなると共に折り返し部分内でも浮遊容量を発生させることができる。したがって、折り返しによって第１エレメントが長くなることと、折り返しで得られた浮遊容量とによって、共振周波数を得ることができる。また、高いインピーダンスとなる第２エレメントの先端（第７延在部の先端）に対しても、折り返し部分で効果的に浮遊容量を発生させることができる。
In this antenna device, since the first element and the second element are formed on the surface of the substrate body with the metal foil, the stray capacitance between each element and between the ground and the ground is effectively reduced. By using it, it is possible to make double resonance.
In particular, since the first element has the second extending portion, the third extending portion, and the fourth extending portion, the seventh extending portion is formed by the first element being folded and extended. As a result, the stray capacitance between the two and the stray capacitance increases, and stray capacitance can be generated even in the folded portion. Therefore, the resonance frequency can be obtained by the lengthening of the first element due to the folding and the stray capacitance obtained by the folding. In addition, stray capacitance can be effectively generated at the folded portion with respect to the tip of the second element (tip of the seventh extending portion) having high impedance.
第２の発明に係るアンテナ装置は、第１の発明において、前記第２エレメントが、前記第６延在部と前記第７延在部とを接続する第８延在部と第９延在部とを有し、前記第８延在部が、前記第６延在部の先端に基端が接続され前記第２延在部に沿って前記第２延在部の先端側に向けて延在し、前記第９延在部が、前記第８延在部の先端に基端が接続され前記第６延在部に沿って前記第６延在部の基端側に向けて延在し先端が前記第７延在部の基端に接続されていることを特徴とする。
すなわち、このアンテナ装置では、第２エレメントが、上記の第８延在部と第９延在部とを有しているので、折り返し部分となる第６延在部と第９延在部との間に浮遊容量が発生し、並列共振が発生することで、第２エレメントのインピーダンスを高くすることができる。
The antenna device according to a second aspect of the present invention is the antenna device according to the first aspect, wherein the second element connects the sixth extension part and the seventh extension part to the eighth extension part and the ninth extension part. And the eighth extending portion has a proximal end connected to the distal end of the sixth extending portion and extends toward the distal end side of the second extending portion along the second extending portion. The ninth extending portion has a proximal end connected to a distal end of the eighth extending portion and extends toward the proximal end side of the sixth extending portion along the sixth extending portion. Is connected to the base end of the seventh extending portion.
That is, in this antenna device, since the second element has the eighth extension portion and the ninth extension portion, the sixth extension portion and the ninth extension portion, which are folded portions, are provided. Since the stray capacitance is generated between them and parallel resonance occurs, the impedance of the second element can be increased.
第３の発明に係るアンテナ装置は、第１又は第２の発明において、前記基板本体の表面に金属箔でパターン形成された第３エレメントを備え、前記第３エレメントが、前記第６延在部及び前記第１延在部の少なくとも一方に基端が接続され前記第７延在部側とは逆方向に延在する第１０延在部と、前記第１０延在部の先端から前記第６延在部に沿って延在する第１１延在部とを有していることを特徴とする。
すなわち、このアンテナ装置では、第３エレメントが、上記の第１０延在部と第１１延在部とを有しているので、主に第１エレメントと第２エレメントとで得られる２つの共振周波数とは別の共振周波数を第３エレメントにより得ることができる。
An antenna device according to a third invention is the antenna device according to the first or second invention, further comprising a third element patterned on the surface of the substrate body with a metal foil, wherein the third element is the sixth extension portion. And a tenth extending portion connected to at least one of the first extending portions and extending in a direction opposite to the seventh extending portion side, and the sixth extending portion from the distal end of the tenth extending portion. And an eleventh extending portion extending along the extending portion.
That is, in this antenna device, since the third element has the tenth extending portion and the eleventh extending portion, two resonance frequencies obtained mainly by the first element and the second element are used. A different resonance frequency can be obtained by the third element.
第４の発明に係るアンテナ装置は、第３の発明において、前記第１０延在部が、前記第６延在部の先端側に基端が接続され、前記第１１延在部が、前記第６延在部の基端側に向けて延在し先端が開放端となっていることを特徴とする。
第５の発明に係るアンテナ装置は、第３の発明において、前記第１０延在部が、前記第１延在部に基端が接続され、前記第１１延在部が、前記第６延在部の先端側に向けて延在し先端が開放端となっていることを特徴とする。
第６の発明に係るアンテナ装置は、第３の発明において、前記第１０延在部が、前記第６延在部の先端側に基端が接続されたものと、前記第１延在部に基端が接続されたものとの一対設けられ、前記第１１延在部が、一対の前記第１０延在部の一方に基端が接続され他方に先端が接続されていることを特徴とする。
The antenna device according to a fourth aspect of the present invention is the antenna device according to the third aspect, wherein the tenth extending portion is connected to the distal end side of the sixth extending portion, and the eleventh extending portion is the first extending portion. 6 It extends toward the base end side of the extension part, and the front-end | tip is an open end, It is characterized by the above-mentioned.
In the antenna device according to a fifth aspect based on the third aspect, the tenth extending portion is connected to the first extending portion at a base end, and the eleventh extending portion is the sixth extending portion. It extends toward the front end side of the part, and the front end is an open end.
The antenna device according to a sixth aspect of the present invention is the antenna device according to the third aspect, wherein the tenth extending portion has a base end connected to a distal end side of the sixth extending portion and the first extending portion. A pair of base ends are provided, and the eleventh extending portion has a base end connected to one of the pair of tenth extending portions and a tip connected to the other. .
第７の発明に係るアンテナ装置は、第１から第６の発明のいずれかにおいて、前記第７延在部の途中に誘電体アンテナのアンテナ素子が接続されていることを特徴とする。
すなわち、このアンテナ装置では、所望の共振周波数に自己共振しないローディング素子のアンテナ素子によってエレメント長の短縮化及び高インピーダンス化と、浮遊容量の増大とが可能になり、複共振化の調整が容易になると共に小型化とアンテナ特性の向上とを図ることができる。
また、基板本体の平面内で設計が可能であり、従来の誘電体ブロックや樹脂成型体等を使用する場合に比べて薄型化が可能であると共に、誘電体アンテナであるアンテナ素子の選択によって、小型化および高性能化が可能になる。また、金型、設計変更等によるコストが必要なく、低コストを実現することができる。
An antenna device according to a seventh invention is characterized in that, in any one of the first to sixth inventions, an antenna element of a dielectric antenna is connected in the middle of the seventh extending portion.
That is, in this antenna device, the element length of the loading element that does not self-resonate at a desired resonance frequency can be shortened, the impedance can be increased, and the stray capacitance can be increased. In addition, the size and the antenna characteristics can be improved.
In addition, it is possible to design in the plane of the substrate body, and it is possible to reduce the thickness compared to the case of using a conventional dielectric block or resin molded body, and by selecting an antenna element that is a dielectric antenna, Miniaturization and high performance are possible. Further, there is no need for costs due to molds, design changes, etc., and low costs can be realized.
第８の発明に係るアンテナ装置は、第１から第７の発明のいずれかにおいて、前記第７延在部に第１受動素子が接続されていることを特徴とする。
第９の発明に係るアンテナ装置は、第３の発明において、前記第１０延在部に第２受動素子が接続されていることを特徴とする。
すなわち、これらのアンテナ装置では、各受動素子の選択によって、各共振周波数をフレキシブルに調整可能であり、設計条件に応じた複共振化が可能なアンテナ装置を得ることができる。このように、アンテナ構成上、各共振周波数をフレキシブルに調整できるため、共振周波数の入れ替えが可能になり、用途や機器に応じて受動素子等による調整箇所を変更可能になっている。
An antenna device according to an eighth invention is characterized in that, in any one of the first to seventh inventions, a first passive element is connected to the seventh extending portion.
An antenna device according to a ninth invention is characterized in that, in the third invention, a second passive element is connected to the tenth extending portion.
That is, in these antenna devices, it is possible to flexibly adjust each resonance frequency by selecting each passive element, and it is possible to obtain an antenna device capable of making multiple resonances according to design conditions. Thus, since each resonance frequency can be flexibly adjusted in terms of the antenna configuration, the resonance frequency can be switched, and the adjustment location by a passive element or the like can be changed according to the application or device.
本発明によれば、以下の効果を奏する。
本発明のアンテナ装置によれば、基板本体の表面にそれぞれ金属箔でパターン形成された上記の第１エレメント及び第２エレメントを備えているので、各エレメント間やグランドとの間の各浮遊容量とを効果的に利用することで、少なくとも２つ以上の共振周波数による複共振化させることができる。
特に、第１エレメントが、上記の第２延在部と第３延在部と第４延在部とを有しているので、折り返しによって第１エレメントが長くなることと、折り返しで得られた浮遊容量とによって、共振周波数を得ることができる。
また、エレメントに接続するアンテナ素子や受動素子の選択によって、各共振周波数をフレキシブルに調整可能であり、設計条件に応じた複共振化が可能になると共に、小型化および高性能化が可能になる。
したがって、本発明のアンテナ装置は、多様な用途や機器に対応した複共振化が容易に可能になると共に、省スペース化を図ることができる。
The present invention has the following effects.
According to the antenna device of the present invention, since the first element and the second element, each of which is patterned with a metal foil, are provided on the surface of the substrate body, each stray capacitance between each element and between the ground and By effectively utilizing this, it is possible to achieve double resonance with at least two resonance frequencies.
In particular, since the first element has the second extending portion, the third extending portion, and the fourth extending portion, the first element is elongated by folding and is obtained by folding. The resonant frequency can be obtained by the stray capacitance.
In addition, each resonant frequency can be flexibly adjusted by selecting antenna elements and passive elements to be connected to the element, so that multiple resonance can be achieved according to design conditions, and miniaturization and high performance can be achieved. .
Therefore, the antenna device of the present invention can easily achieve multiple resonances corresponding to various applications and devices, and can save space.
以下、本発明に係るアンテナ装置の第１実施形態を、図１から図６を参照しながら説明する。 DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, an antenna device according to a first embodiment of the invention will be described with reference to FIGS.
本実施形態におけるアンテナ装置１は、図１及び図２に示すように、絶縁性の基板本体２と、基板本体２の表面にそれぞれ銅箔等の金属箔でパターン形成された第１エレメント３、第２エレメント４及び第３エレメント５とを備えている。 As shown in FIGS. 1 and 2, the antenna device 1 according to the present embodiment includes an insulating substrate body 2, and a first element 3 that is formed by patterning a metal foil such as a copper foil on the surface of the substrate body 2. A second element 4 and a third element 5 are provided.
上記第１エレメント３は、基端側に給電点ＦＰが接続されると共に基板本体２のいずれかの一辺（本実施形態では、図１の符号２ａ）に向けて延在する第１延在部Ｅ１と、第１延在部Ｅ１の先端に基端側が接続され第１延在部Ｅ１に直交する方向に延在する第２延在部Ｅ２と、第２延在部Ｅ２の先端に基端が接続され第１延在部Ｅ１に沿って第１延在部Ｅ１の基端側に向けて延在する第３延在部Ｅ３と、第３延在部Ｅ３の先端から第２延在部Ｅ２に沿って第２延在部Ｅ２の基端側に向けて延在する第４延在部Ｅ４と、第４延在部Ｅ４の先端に基端が接続され第１延在部Ｅ１に沿って延在し他端側がグランドＧＮＤに接続される第５延在部Ｅ５とを有している。 The first element 3 is connected to the feeding point FP on the base end side, and extends toward one side of the substrate body 2 (in this embodiment, reference numeral 2a in FIG. 1). E1, a second extending portion E2 having a proximal end connected to the distal end of the first extending portion E1 and extending in a direction orthogonal to the first extending portion E1, and a proximal end at the distal end of the second extending portion E2. Are connected and extend along the first extending portion E1 toward the proximal end side of the first extending portion E1, and the second extending portion from the distal end of the third extending portion E3. A fourth extending portion E4 extending toward the proximal end side of the second extending portion E2 along E2, and a proximal end connected to the distal end of the fourth extending portion E4 along the first extending portion E1 And a fifth extending portion E5 having the other end connected to the ground GND.
上記第２エレメント４は、第２延在部Ｅ２の基端から前記一辺２ａに向けて延在する第６延在部Ｅ６と、第６延在部Ｅ６の先端に基端が接続され第２延在部Ｅ２に沿って第２延在部Ｅ２の先端側に向けて延在する第７延在部Ｅ７と、第６延在部Ｅ６と第７延在部Ｅ７とを接続する第８延在部Ｅ８と第９延在部Ｅ９とを有している。
上記第８延在部Ｅ８は、第６延在部Ｅ６の先端に基端が接続され第２延在部Ｅ２に沿って第２延在部Ｅ２の先端側に向けて延在している。
また、上記第９延在部Ｅ９は、第８延在部Ｅ８の先端に基端が接続され、第６延在部Ｅ６に沿って第６延在部Ｅ６の基端側に向けて延在していると共に先端が第７延在部Ｅ７の基端に接続されている。
すなわち、第７延在部Ｅ７は、第８延在部Ｅ８と第９延在部Ｅ９とを介して第６延在部の先端に接続されている。なお、第８延在部Ｅ８と第９延在部Ｅ９とを介して接続することが好ましいが、第７延在部Ｅ７と第６延在部Ｅ６とを直接接続しても構わない。
The second element 4 includes a sixth extending portion E6 extending from the proximal end of the second extending portion E2 toward the one side 2a, and a proximal end connected to the distal end of the sixth extending portion E6. A seventh extension E7 extending toward the distal end side of the second extension E2 along the extension E2, and an eighth extension connecting the sixth extension E6 and the seventh extension E7. It has an existing part E8 and a ninth extending part E9.
The eighth extension E8 has a proximal end connected to the tip of the sixth extension E6 and extends toward the tip of the second extension E2 along the second extension E2.
The ninth extending portion E9 has a proximal end connected to the distal end of the eighth extending portion E8 and extends toward the proximal end side of the sixth extending portion E6 along the sixth extending portion E6. And the distal end is connected to the proximal end of the seventh extending portion E7.
That is, the seventh extending portion E7 is connected to the tip end of the sixth extending portion via the eighth extending portion E8 and the ninth extending portion E9. In addition, although it is preferable to connect via the 8th extension part E8 and the 9th extension part E9, you may connect the 7th extension part E7 and the 6th extension part E6 directly.
上記第３エレメント５は、第６延在部Ｅ６の先端側に基端が接続され第７延在部Ｅ７側とは逆方向に延在する第１０延在部Ｅ１０と、第１０延在部Ｅ１０の先端から第６延在部Ｅ６に沿って延在する第１１延在部Ｅ１１とを有している。
本実施形態の第１１延在部Ｅ１１は、第６延在部Ｅ６の基端側に向けて延在し先端が開放端となっている。
The third element 5 includes a tenth extending portion E10 having a proximal end connected to the distal end side of the sixth extending portion E6 and extending in a direction opposite to the seventh extending portion E7 side, and a tenth extending portion. An eleventh extending portion E11 extending along the sixth extending portion E6 from the tip of E10.
The 11th extension part E11 of this embodiment is extended toward the base end side of the 6th extension part E6, and the front-end | tip is an open end.
上記第７延在部Ｅ７の途中には、誘電体アンテナのアンテナ素子ＡＴが接続されている。
また、第７延在部Ｅ７には、アンテナ素子ＡＴよりも基端側の途中に第１受動素子Ｐ１が接続されている。さらに、第１０延在部Ｅ１０には、第２受動素子Ｐ２が接続されている。
In the middle of the seventh extending portion E7, an antenna element AT of a dielectric antenna is connected.
In addition, a first passive element P1 is connected to the seventh extending portion E7 in the middle of the base end side from the antenna element AT. Further, the second passive element P2 is connected to the tenth extending portion E10.
第１延在部Ｅ１は、基板本体２とは別に設けられた回路基板２Ｂに接続配線１１ａで接続され、回路基板２Ｂのインピーダンス調整回路１２を介して給電点ＦＰに接続されている。
また、第５延在部Ｅ５は、基端が上記回路基板２Ｂに接続配線１１ｂで接続され、回路基板２Ｂの受動素子Ｐ１１を介してグランドＧＮＤに接続されている。すなわち、第５延在部Ｅ５は、グランドＧＮＤと接続されたグランドパターンである。
The first extending portion E1 is connected to a circuit board 2B provided separately from the board body 2 by a connection wiring 11a, and is connected to the feeding point FP via the impedance adjustment circuit 12 of the circuit board 2B.
Further, the fifth extending portion E5 has a base end connected to the circuit board 2B via the connection wiring 11b, and is connected to the ground GND via the passive element P11 of the circuit board 2B. That is, the fifth extending portion E5 is a ground pattern connected to the ground GND.
上記回路基板２Ｂ上には、図４に示すように、接続配線１１ａから給電点ＦＰに接続する配線の途中と、接続配線１１ｂからグランドＧＮＤに接続する配線の途中とに設けられたインピーダンス調整回路１２として、受動素子Ｐ１２ａ〜Ｐ１２ｃと受動素子Ｐ１１とが実装されている。すなわち、接続配線１１ｂとグランドＧＮＤとの間に接続された受動素子Ｐ１１と、接続配線１１ａと給電点ＦＰとの間の配線に直列に接続された受動素子Ｐ１２ａと、接続配線１１ａと給電点ＦＰとの間の配線（受動素子Ｐ１２ａの両側）とグランドＧＮＤとの間に並列に接続された２つの受動素子Ｐ１２ｂ，Ｐ１２ｃとが回路基板２Ｂ上に実装されている。 On the circuit board 2B, as shown in FIG. 4, an impedance adjustment circuit provided in the middle of the wiring connecting from the connection wiring 11a to the feeding point FP and in the middle of the wiring connecting from the connection wiring 11b to the ground GND. 12, passive elements P12a to P12c and passive element P11 are mounted. That is, the passive element P11 connected between the connection wiring 11b and the ground GND, the passive element P12a connected in series to the wiring between the connection wiring 11a and the feeding point FP, the connection wiring 11a and the feeding point FP. Two passive elements P12b and P12c connected in parallel between the wiring between the two terminals (both sides of the passive element P12a) and the ground GND are mounted on the circuit board 2B.
上記基板本体２及び回路基板２Ｂは、一般的なプリント基板であって、本実施形態では、ガラスエポキシ樹脂等からなるプリント基板を採用している。なお、接続配線１１ａ，１１ｂは、ピンプローブ、板状の金属によるバネ接点又はＦＰＣ等で形成されている。
上記給電点ＦＰは、回路基板２ＢのグランドＧＮＤに設けられた高周波回路（図示略）の給電点に接続される。なお、図２、図３及び以降の配線図では、インピーダンス調整回路１２及び回路基板２Ｂを省略して給電点ＦＰ及びグランドＧＮＤだけを図示している。
上記各受動素子は、例えばインダクタ、コンデンサ、抵抗又はジャンパー線が採用される。
The board body 2 and the circuit board 2B are general printed boards, and in the present embodiment, printed boards made of glass epoxy resin or the like are employed. The connection wirings 11a and 11b are formed of a pin probe, a plate-like metal spring contact, FPC, or the like.
The feed point FP is connected to a feed point of a high-frequency circuit (not shown) provided on the ground GND of the circuit board 2B. 2 and 3 and subsequent wiring diagrams, the impedance adjustment circuit 12 and the circuit board 2B are omitted, and only the feeding point FP and the ground GND are shown.
For example, an inductor, a capacitor, a resistor, or a jumper line is used as each passive element.
上記アンテナ素子ＡＴは、所望の共振周波数に自己共振しないローディング素子であって、例えば図５に示すように、セラミックス等の誘電体１２１の表面にＡｇ等の導体パターン１２２が形成されたチップアンテナである。
このアンテナ素子ＡＴは、共振周波数等の設定に応じて、その長さ、幅、導体パターン等が異なる素子を選択しても構わない。また、所望の周波数によっては、アンテナ素子ＡＴに使用している誘電体１２１を、磁性体、若しくは誘電体と磁性体とを混合した複合材料としても構わない。
The antenna element AT is a loading element that does not self-resonate at a desired resonance frequency, and is a chip antenna in which a conductor pattern 122 such as Ag is formed on the surface of a dielectric 121 such as ceramic as shown in FIG. is there.
As the antenna element AT, elements having different lengths, widths, conductor patterns, and the like may be selected according to the setting of the resonance frequency and the like. Depending on the desired frequency, the dielectric 121 used in the antenna element AT may be a magnetic material or a composite material in which a dielectric and a magnetic material are mixed.
上記第１エレメント３と第２エレメント４と第３エレメント５とは、互いの間の浮遊容量と、グランドＧＮＤとの間の浮遊容量とを発生可能に、互いに間隔を空けて延在している。
すなわち、図３に示すように、第４延在部Ｅ４とグランドＧＮＤとの間の浮遊容量Ｃａと、第７延在部Ｅ７とグランドＧＮＤとの間の浮遊容量Ｃｂと、アンテナ素子ＡＴとグランドＧＮＤとの間の浮遊容量Ｃｃと、第２延在部Ｅ２と第４延在部Ｅ４との間の浮遊容量Ｃｄと、第７延在部Ｅ７と第２延在部Ｅ２との間の浮遊容量Ｃｅと、第６延在部Ｅ６と第９延在部Ｅ９との間の浮遊容量Ｃｆと、第６延在部Ｅ６と第１１延在部Ｅ１１との間の浮遊容量Ｃｇと、第１１延在部Ｅ１１とグランドＧＮＤとの間の浮遊容量Ｃｈとが発生可能である。
The first element 3, the second element 4, and the third element 5 extend at a distance from each other so as to generate a stray capacitance between them and a stray capacitance between the ground GND. .
That is, as shown in FIG. 3, the stray capacitance Ca between the fourth extending portion E4 and the ground GND, the stray capacitance Cb between the seventh extending portion E7 and the ground GND, the antenna element AT and the ground The floating capacitance Cc between the GND, the floating capacitance Cd between the second extending portion E2 and the fourth extending portion E4, and the floating between the seventh extending portion E7 and the second extending portion E2. The capacitance Ce, the stray capacitance Cf between the sixth extension portion E6 and the ninth extension portion E9, the stray capacitance Cg between the sixth extension portion E6 and the eleventh extension portion E11, and the eleventh A stray capacitance Ch between the extending portion E11 and the ground GND can be generated.
次に、本実施形態のアンテナ装置における各共振周波数について、図を参照して説明する。 Next, each resonance frequency in the antenna device of the present embodiment will be described with reference to the drawings.
本実施形態のアンテナ装置１では、図５に示すように、周波数の低い方から、第１の共振周波数ｆ１、第２の共振周波数ｆ２及び第３の共振周波数ｆ３の順に３つの周波数帯に複共振化される。
上記第１の共振周波数ｆ１は、第２エレメント４と第１エレメント３とアンテナ素子ＡＴと第１受動素子Ｐ１と浮遊容量とで決定される。また、上記第２の共振周波数ｆ２は、第３エレメント５と第１エレメント３と第２受動素子Ｐ２と浮遊容量とで決定される。さらに、上記第３の共振周波数ｆ３は、第１エレメント３と浮遊容量とで決定される。
In the antenna device 1 according to the present embodiment, as shown in FIG. 5, the first resonance frequency f1, the second resonance frequency f2, and the third resonance frequency f3 are combined in three frequency bands in order from the lowest frequency. Resonated.
The first resonance frequency f1 is determined by the second element 4, the first element 3, the antenna element AT, the first passive element P1, and the stray capacitance. The second resonance frequency f2 is determined by the third element 5, the first element 3, the second passive element P2, and the stray capacitance. Further, the third resonance frequency f3 is determined by the first element 3 and the stray capacitance.
以下、これら共振周波数について、より詳しく説明する。
「第１の共振周波数ｆ１について」
上記第１の共振周波数ｆ１の周波数は、第２エレメント４と第１エレメント３とアンテナ素子ＡＴと第１受動素子Ｐ１と浮遊容量Ｃａ，Ｃｂ，Ｃｃ，Ｃｄ，Ｃｅ，Ｃｆとにより設定および調整することができる。
また、第１の共振周波数ｆ１のインピーダンス調整は、浮遊容量Ｃａ，Ｃｂ，Ｃｃ，Ｃｄ，Ｃｅ，Ｃｆの各浮遊容量の設定で行うことができる。
さらに、最終的な周波数調整は、第１受動素子Ｐ１の選択によりフレキシブルに行うことが可能である。
なお、第１の共振周波数ｆ１における最終的なインピーダンス調整は、受動素子Ｐ１１と受動素子Ｐ１２ｃとの選択によりグランドＧＮＤ側に流れる高周波電流の流れをコントロールすることで、フレキシブルに行うことが可能である。
このように第１の共振周波数ｆ１は、主に図２中の一点鎖線Ａ１の部分で調整される。
Hereinafter, these resonance frequencies will be described in more detail.
“About the first resonance frequency f1”
The frequency of the first resonance frequency f1 is set and adjusted by the second element 4, the first element 3, the antenna element AT, the first passive element P1, and the stray capacitances Ca, Cb, Cc, Cd, Ce, Cf. be able to.
Further, the impedance adjustment of the first resonance frequency f1 can be performed by setting each of the stray capacitances Ca, Cb, Cc, Cd, Ce, and Cf.
Furthermore, the final frequency adjustment can be flexibly performed by selecting the first passive element P1.
The final impedance adjustment at the first resonance frequency f1 can be flexibly performed by controlling the flow of the high-frequency current flowing to the ground GND side by selecting the passive element P11 and the passive element P12c. .
In this way, the first resonance frequency f1 is adjusted mainly at the portion of the one-dot chain line A1 in FIG.
「第２の共振周波数ｆ２について」
上記第２の共振周波数ｆ２の周波数は、第３エレメント５と第１エレメント３と第２受動素子Ｐ２と浮遊容量Ｃａ，Ｃｄ，Ｃｅ，Ｃｆ，Ｃｇ，Ｃｈとにより設定および調整することができる。
また、第２の共振周波数ｆ２のインピーダンス調整は、浮遊容量Ｃａ，Ｃｄ，Ｃｅ，Ｃｆ，Ｃｇ，Ｃｈの各浮遊容量の設定で行うことができる。
さらに、最終的な周波数調整は、第２受動素子Ｐ２の選択によりフレキシブルに行うことが可能である。
なお、第２の共振周波数ｆ２における最終的なインピーダンス調整は、受動素子Ｐ１１と受動素子Ｐ１２ａ，Ｐ１２ｂとの選択によりグランドＧＮＤ側に流れる高周波電流の流れをコントロールすることで、フレキシブルに行うことが可能である。
このように第２の共振周波数ｆ２は、主に図２中の二点鎖線Ａ２の部分で調整される。
“About the second resonance frequency f2”
The frequency of the second resonance frequency f2 can be set and adjusted by the third element 5, the first element 3, the second passive element P2, and the stray capacitances Ca, Cd, Ce, Cf, Cg, and Ch.
Further, the impedance adjustment of the second resonance frequency f2 can be performed by setting each of the stray capacitances Ca, Cd, Ce, Cf, Cg, and Ch.
Further, the final frequency adjustment can be flexibly performed by selecting the second passive element P2.
The final impedance adjustment at the second resonance frequency f2 can be flexibly performed by controlling the flow of the high-frequency current flowing to the ground GND side by selecting the passive element P11 and the passive elements P12a and P12b. It is.
In this way, the second resonance frequency f2 is adjusted mainly at the portion of the two-dot chain line A2 in FIG.
「第３の共振周波数ｆ３について」
上記第３の共振周波数ｆ３の周波数は、第１エレメント３と浮遊容量Ｃａ，Ｃｄ，Ｃｅとにより設定および調整することができる。
また、第３の共振周波数ｆ３のインピーダンス調整は、浮遊容量Ｃａ，Ｃｄ，Ｃｅの各浮遊容量の設定で行うことができる。
さらに、最終的な周波数調整は、受動素子Ｐ１２ａの選択によりフレキシブルに行うことが可能である。
なお、第３の共振周波数ｆ３における最終的なインピーダンス調整は、受動素子Ｐ１１の選択によりグランドＧＮＤ側に流れる高周波電流の流れをコントロールすることで、フレキシブルに行うことが可能である。
このように第３の共振周波数ｆ３は、主に図２中の破線Ａ３の部分で調整される。
“About the third resonance frequency f3”
The frequency of the third resonance frequency f3 can be set and adjusted by the first element 3 and the stray capacitances Ca, Cd, and Ce.
The impedance adjustment of the third resonance frequency f3 can be performed by setting each of the stray capacitances Ca, Cd, and Ce.
Further, the final frequency adjustment can be flexibly performed by selecting the passive element P12a.
The final impedance adjustment at the third resonance frequency f3 can be flexibly performed by controlling the flow of the high-frequency current flowing to the ground GND side by selecting the passive element P11.
In this way, the third resonance frequency f3 is adjusted mainly at the portion of the broken line A3 in FIG.
このように本実施形態のアンテナ装置１では、基板本体２の表面にそれぞれ金属箔でパターン形成された上記の第１エレメント３、第２エレメント４及び第３エレメント５を備えているので、各エレメント間やグランドＧＮＤとの間の各浮遊容量とを効果的に利用することで、複共振化させることができる。
特に、第１エレメント３が、上記の第２延在部Ｅ２と第３延在部Ｅ３と第４延在部Ｅ４とを有しているので、第１エレメント３が折り返して延在することで第７延在部Ｅ７との間の浮遊容量が大きくなると共に折り返し部分内でも浮遊容量を発生させることができる。したがって、折り返しによって第１エレメント３が長くなることと、折り返しで得られた浮遊容量とによって、共振周波数を得ることができる。また、高いインピーダンスとなる第２エレメント４の先端（第７延在部Ｅ７の先端）に対しても、折り返し部分で効果的に浮遊容量を発生させることができる。
As described above, the antenna device 1 according to the present embodiment includes the first element 3, the second element 4, and the third element 5 that are patterned on the surface of the substrate body 2 with the metal foil. By effectively using each stray capacitance between the ground and the ground GND, a double resonance can be achieved.
In particular, since the first element 3 has the second extending portion E2, the third extending portion E3, and the fourth extending portion E4, the first element 3 is folded and extended. The stray capacitance between the seventh extending portion E7 increases and the stray capacitance can be generated in the folded portion. Therefore, the resonance frequency can be obtained by the lengthening of the first element 3 by the folding and the stray capacitance obtained by the folding. In addition, stray capacitance can be effectively generated at the folded portion even at the tip of the second element 4 having a high impedance (tip of the seventh extending portion E7).
また、第２エレメント４が、上記の第８延在部Ｅ８と第９延在部Ｅ９とを有しているので、折り返し部分となる第６延在部Ｅ６と第９延在部Ｅ９との間に浮遊容量が発生し、並列共振が発生することで、第２エレメント４のインピーダンスを高くすることができる。 In addition, since the second element 4 includes the eighth extending portion E8 and the ninth extending portion E9, the sixth extending portion E6 and the ninth extending portion E9 that become the folded portions are provided. Since the stray capacitance is generated between them and parallel resonance occurs, the impedance of the second element 4 can be increased.
また、所望の共振周波数に自己共振しないローディング素子のアンテナ素子ＡＴによってエレメント長の短縮化及び高インピーダンス化と、浮遊容量の増大とが可能になり、複共振化の調整が容易になると共に小型化とアンテナ特性の向上とを図ることができる。
また、基板本体２の平面内で設計が可能であり、従来の誘電体ブロックや樹脂成型体等を使用する場合に比べて薄型化が可能であると共に、誘電体アンテナであるアンテナ素子ＡＴの選択によって、小型化および高性能化が可能になる。また、金型、設計変更等によるコストが必要なく、低コストを実現することができる。
In addition, the antenna element AT, which is a loading element that does not self-resonate at a desired resonance frequency, can shorten the element length, increase the impedance, and increase the stray capacitance. It is possible to improve the antenna characteristics.
In addition, the design can be made in the plane of the substrate body 2, and the thickness can be reduced as compared with the case where a conventional dielectric block or resin molding is used, and the antenna element AT which is a dielectric antenna is selected. Thus, miniaturization and high performance can be achieved. Further, there is no need for costs due to molds, design changes, etc., and low costs can be realized.
また、アンテナ素子ＡＴおよび各受動素子の選択によって、各共振周波数をフレキシブルに調整可能であり、設計条件に応じた複共振化が可能なアンテナ装置を得ることができる。このように、アンテナ構成上、各共振周波数をフレキシブルに調整できるため、共振周波数の入れ替えが可能になり、用途や機器に応じて受動素子等による調整箇所を変更可能になっている。 Further, by selecting the antenna element AT and each passive element, it is possible to flexibly adjust each resonance frequency, and it is possible to obtain an antenna device capable of making multiple resonances according to design conditions. Thus, since each resonance frequency can be flexibly adjusted in terms of the antenna configuration, the resonance frequency can be switched, and the adjustment location by a passive element or the like can be changed according to the application or device.
次に、本発明に係るアンテナ装置の第２から第４実施形態について、図７から図９を参照して以下に説明する。なお、以下の各実施形態の説明において、上記実施形態において説明した同一の構成要素には同一の符号を付し、その説明は省略する。 Next, second to fourth embodiments of the antenna device according to the present invention will be described below with reference to FIGS. In the following description of each embodiment, the same constituent elements described in the above embodiment are denoted by the same reference numerals, and the description thereof is omitted.
第２実施形態と第１実施形態との異なる点は、第１実施形態では、第３エレメント５が設けられているのに対し、第２実施形態のアンテナ装置２１は、図７に示すように、第３エレメント５が無く、第１エレメント３及び第２エレメント４だけでアンテナエレメントが構成されている点である。
したがって、第２実施形態のアンテナ装置２１では、第３エレメント５で得られる共振周波数が無く、第１エレメント３と第２エレメント４とで得られる２つの共振周波数が得られる。
The difference between the second embodiment and the first embodiment is that, in the first embodiment, the third element 5 is provided, whereas the antenna device 21 of the second embodiment is as shown in FIG. The third element 5 is not provided, and the antenna element is configured by only the first element 3 and the second element 4.
Therefore, in the antenna device 21 of the second embodiment, there is no resonance frequency obtained by the third element 5 and two resonance frequencies obtained by the first element 3 and the second element 4 are obtained.
第３実施形態と第１実施形態との異なる点は、第１実施形態では、第１０延在部Ｅ１０が、第６延在部Ｅ６の先端側に基端が接続され、第１１延在部Ｅ１１が、第６延在部Ｅ６の基端側に向けて延在し先端が開放端となっているのに対し、第３実施形態のアンテナ装置３１は、図８に示すように、第３エレメント３５において、第１０延在部Ｅ１０Ｂが、第１延在部Ｅ１の途中に基端が接続され、第１１延在部Ｅ１１が、第６延在部Ｅ６の先端側に向けて延在し先端が開放端となっている点である。
すなわち、第３実施形態では、第３エレメント３５が第１実施形態とは逆向きの開放端を有している。
The difference between the third embodiment and the first embodiment is that, in the first embodiment, the tenth extending portion E10 is connected to the distal end side of the sixth extending portion E6, and the eleventh extending portion. E11 extends toward the base end side of the sixth extending portion E6 and has a distal end that is an open end, whereas the antenna device 31 of the third embodiment has a third configuration as shown in FIG. In the element 35, the tenth extending portion E10B is connected at the base end in the middle of the first extending portion E1, and the eleventh extending portion E11 extends toward the distal end side of the sixth extending portion E6. The tip is an open end.
That is, in the third embodiment, the third element 35 has an open end opposite to that of the first embodiment.
また、第４実施形態と第１実施形態との異なる点は、第１１延在部Ｅ１１の先端が開放端になっているのに対し、第４実施形態のアンテナ装置４１では、図９に示すように、第１１延在部Ｅ１１の両端が第１０延在部Ｅ１０Ａ及び第１０延在部Ｅ１０Ｂを介して第６延在部Ｅ６及び第１延在部Ｅ１に接続され、第３エレメント４５が閉じている点である。 Further, the difference between the fourth embodiment and the first embodiment is that the tip of the eleventh extending portion E11 is an open end, whereas the antenna device 41 of the fourth embodiment is shown in FIG. Thus, both ends of the eleventh extending portion E11 are connected to the sixth extending portion E6 and the first extending portion E1 via the tenth extending portion E10A and the tenth extending portion E10B, and the third element 45 is It is a closed point.
すなわち、第４実施形態のアンテナ装置４１では、第１０延在部が、第６延在部Ｅ６の先端側に基端が接続された第１０延在部Ｅ１０Ａと、第１延在部Ｅ１に基端が接続された第１０延在部Ｅ１０Ｂとの一対設けられ、第１１延在部Ｅ１１が、一対の第１０延在部Ｅ１０Ａ，Ｅ１０Ｂの一方に基端が接続され他方に先端が接続されている、したがって、第４実施形態では、第３エレメント４５がループ状となっており、開放端を有していない。なお、第１０延在部Ｅ１０Ａには、第２受動素子Ｐ２ａが接続されており、第１０延在部Ｅ１０Ｂには、第２受動素子Ｐ２ｂが接続されている。 That is, in the antenna device 41 of the fourth embodiment, the tenth extending portion is connected to the tenth extending portion E10A whose proximal end is connected to the distal end side of the sixth extending portion E6 and the first extending portion E1. A pair of tenth extending portions E10B connected to the base ends is provided, and an eleventh extending portion E11 is connected to one end of the pair of tenth extending portions E10A and E10B and the other end is connected to the other end. Therefore, in the fourth embodiment, the third element 45 has a loop shape and does not have an open end. Note that the second passive element P2a is connected to the tenth extending portion E10A, and the second passive element P2b is connected to the tenth extending portion E10B.
このように第３実施形態及び第４実施形態でも、第３エレメント３５，４５によって共振周波数が得られ、第１実施形態と同様に３つの共振周波数による複共振化が可能である。 As described above, also in the third embodiment and the fourth embodiment, the resonance frequency is obtained by the third elements 35 and 45, and the multi-resonance by the three resonance frequencies can be realized as in the first embodiment.
次に、上記第１実施形態のアンテナ装置を実際に作製した実施例について、ＶＳＷＲ特性（電圧定在波比）を測定した結果と、各共振周波数での放射パターンについて測定した結果とを、図６及び図１０を参照して説明する。 Next, the results of measuring the VSWR characteristics (voltage standing wave ratio) and the results of measuring the radiation pattern at each resonance frequency are shown in FIG. 6 and FIG.
なお、これらの測定においては、各受動素子は以下のものを用いた。
第１受動素子Ｐ１：Ｌ＝２．２ｎＨのインダクタ
第２受動素子Ｐ２：Ｌ＝１．２ｎＨのインダクタ
受動素子Ｐ１１：Ｌ＝１０ｎＨのインダクタ
受動素子Ｐ１２ａ：Ｌ＝１．８ｎＨのインダクタ
受動素子Ｐ１２ｂ：Ｃ＝０．３ｐＦのコンデンサ
受動素子Ｐ１２ｃ：Ｌ＝５．６ｎＨのインダクタ
In these measurements, the following passive elements were used.
First passive element P1: Inductor with L = 2.2 nH Second passive element P2: Inductive passive element P11 with L = 1.2 nH: Inductive passive element P12a with L = 10 nH: Inductive passive element P12b with L = 1.8 nH: C = 0.3 pF capacitor passive element P12c: L = 5.6 nH inductor
この測定結果からわかるように、図６及び以下の表１に示すように、第１〜第３の共振周波数ｆ１〜ｆ３のいずれも良好な特性が得られている。
表１において、第１の共振周波数ｆ１の周波数帯は８００ＭＨｚ、第２の共振周波数ｆ２の周波数帯は１８００ＭＨｚ、第３の共振周波数ｆ３の周波数帯は２１００ＭＨｚである。なお、表１において、ＶＳＷＲ≦３の場合には、第２の共振周波数ｆ２と第３の共振周波数ｆ３との互いの周波数帯が１つになった広帯域化が実現されている。
In Table 1, the frequency band of the first resonance frequency f1 is 800 MHz, the frequency band of the second resonance frequency f2 is 1800 MHz, and the frequency band of the third resonance frequency f3 is 2100 MHz. In Table 1, in the case of VSWR ≦ 3, widening is realized in which the frequency bands of the second resonance frequency f2 and the third resonance frequency f3 are one.
次に、上記実施例のアンテナ装置について、第１の共振周波数ｆ１、第２の共振周波数ｆ２及び第３の共振周波数ｆ３での放射パターンについて測定した結果を、図１０に示す。
なお、第７延在部Ｅ７の基端から先端に向かう延在方向（アンテナ素子ＡＴの延在方向）を−Ｙ方向とし、第１延在部Ｅ１の基端から先端に向かう延在方向を−Ｘ方向とし、基板本体２表面に対する垂直方向をＺ方向とした。この際のＺＸ面に対する垂直偏波、水平偏波及び電力利得を測定した。
Next, FIG. 10 shows the measurement results of the radiation patterns at the first resonance frequency f1, the second resonance frequency f2, and the third resonance frequency f3 for the antenna device of the above-described embodiment.
The extending direction from the proximal end of the seventh extending portion E7 to the distal end (the extending direction of the antenna element AT) is defined as the -Y direction, and the extending direction from the proximal end of the first extending portion E1 to the distal end is defined as the -Y direction. The −X direction was used, and the direction perpendicular to the surface of the substrate body 2 was the Z direction. At this time, vertical polarization, horizontal polarization, and power gain with respect to the ZX plane were measured.
この結果、ＺＸ面における第１の共振周波数ｆ１の平均電力利得は−４．３ｄＢｉであり、第２の共振周波数ｆ２の平均電力利得は−２．４ｄＢｉであり、第３の共振周波数ｆ３の平均電力利得は−４．３ｄＢｉであった。 As a result, the average power gain of the first resonance frequency f1 in the ZX plane is −4.3 dBi, the average power gain of the second resonance frequency f2 is −2.4 dBi, and the average of the third resonance frequency f3 The power gain was -4.3 dBi.
なお、本発明は上記各実施形態及び実施例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において種々の変更を加えることができる。 The present invention is not limited to the above embodiments and examples, and various modifications can be made without departing from the spirit of the present invention.
例えば、上記各実施形態では、インピーダンス調整回路やグランドを基板本体とは別の回路基板に設けて接続配線で接続しているが、インピーダンス調整回路やグランドも基板本体に形成しても構わない。
また、第７延在部にアンテナ素子を設けているが、第１エレメントの第２延在部や第４延在部又は第３エレメントの第１１延在部にアンテナ素子を設けてエレメントの短縮化を行い、装置全体の小型化を図っても構わない。
For example, in each of the above embodiments, the impedance adjustment circuit and the ground are provided on a circuit board different from the board body and are connected by the connection wiring. However, the impedance adjustment circuit and the ground may be formed on the board body.
In addition, although the antenna element is provided in the seventh extending portion, the element is shortened by providing the antenna element in the second extending portion, the fourth extending portion, or the eleventh extending portion of the third element of the first element. It is possible to reduce the size of the entire apparatus.
また、上述したようにアンテナ素子を接続してエレメントの一部とすることが好ましいが、アンテナ素子を接続せずに、銅箔等の金属箔のみで延在した第７延在部でも構わない。この際、高インピーダンス化するために、第７延在部の少なくとも一部を他の部分よりも幅狭の細いパターンにしたり、ジグザグに折り返しながら全体として一定方向に延在するミアンダパターンとしたりすることが好ましい。
さらに、基板サイズに余裕がある場合には、上記エレメントの一部を、線状若しくは板状の金属を折り返した形状のパターンに置き換えても構わない。また、同一の基板本体の表裏面に対してスルーホールを用いて、螺旋状などの形状に旋回させたパターンにしても構わない。
In addition, as described above, it is preferable to connect the antenna element to be a part of the element, but it is also possible to connect the antenna element to the seventh extending portion that is extended only by a metal foil such as a copper foil. . At this time, in order to increase the impedance, at least a part of the seventh extension part is formed into a narrow pattern narrower than the other parts, or a meander pattern extending in a certain direction as a whole while zigzag is folded back. It is preferable.
Furthermore, when there is a margin in the substrate size, a part of the element may be replaced with a pattern in which a linear or plate-like metal is folded. Moreover, you may make it the pattern swirled in shapes, such as a spiral shape, using a through hole with respect to the front and back of the same board | substrate body.
また、第１エレメントでは、第２延在部から第５延在部によって一段の折り返し部分を形成しているが、さらに第５延在部とグランドとの間に同様の折り返し部分を追加して設けて複数段の折り返し部分を形成してジグザグに折り返されたミアンダパターンとしても構わない。これにより、第５延在部の前後で形成された２段の折り返し部分で、さらに多くの浮遊容量を発生させることができる。 In the first element, the second extending portion to the fifth extending portion form a one-step folded portion, but a similar folded portion is added between the fifth extending portion and the ground. It is also possible to provide a meander pattern that is provided in a zigzag manner by forming a plurality of folded portions. As a result, more stray capacitance can be generated at the two-stage folded portion formed before and after the fifth extending portion.
１，２１，３１，４１…アンテナ装置、２…基板本体、２ａ…基板本体の一辺、３…第１エレメント、４…第２エレメント、５…第３エレメント、ＡＴ…アンテナ素子、Ｅ１…第１延在部、Ｅ２…第２延在部、Ｅ３…第３延在部、Ｅ４…第４延在部、Ｅ５…第５延在部、Ｅ６…第６延在部、Ｅ７…第７延在部、Ｅ８…第８延在部、Ｅ９…第９延在部、Ｅ１０，Ｅ１０Ａ，Ｅ１０Ｂ…第１０延在部、Ｅ１１…第１１延在部、ＧＮＤ…グランド、Ｐ１…第１受動素子、Ｐ２，Ｐ２ａ，Ｐ２ｂ…第２受動素子、Ｐ１１，Ｐ１２ａ，Ｐ１２ｂ，Ｐ１２ｃ…インピーダンス調整回路の受動素子、ＦＰ…給電点 1, 2, 31, 41 ... antenna device, 2 ... substrate body, 2 a ... one side of the substrate body, 3 ... first element, 4 ... second element, 5 ... third element, AT ... antenna element, E1 ... first Extension part, E2 ... Second extension part, E3 ... Third extension part, E4 ... Fourth extension part, E5 ... Fifth extension part, E6 ... Sixth extension part, E7 ... Seventh extension Part, E8 ... 8th extension part, E9 ... 9th extension part, E10, E10A, E10B ... 10th extension part, E11 ... 11th extension part, GND ... Ground, P1 ... 1st passive element, P2 , P2a, P2b ... second passive element, P11, P12a, P12b, P12c ... passive elements of the impedance adjustment circuit, FP ... feed point
Claims (7)
前記第１エレメントが、基端側に給電点が接続されると共に前記基板本体のいずれかの一辺に向けて延在する第１延在部と、前記第１延在部の先端に基端側が接続され前記第１延在部に直交する方向に延在する第２延在部と、前記第２延在部の先端に基端が接続され前記第１延在部に沿って前記第１延在部の基端側に向けて延在する第３延在部と、前記第３延在部の先端から前記第２延在部に沿って前記第２延在部の基端側に向けて延在する第４延在部と、前記第４延在部の先端に基端が接続され前記第１延在部に沿って延在し他端側がグランドに接続される第５延在部とを有し、
前記第２エレメントが、前記第２延在部の基端から前記一辺に向けて延在する第６延在部と、前記第６延在部の先端に基端が接続され前記第２延在部に沿って前記第２延在部の先端側に向けて延在する第７延在部とを有し、
前記第３エレメントが、前記第６延在部及び前記第１延在部の少なくとも一方に基端が接続され前記第７延在部側とは逆方向に延在する第１０延在部と、前記第１０延在部の先端から前記第６延在部に沿って延在する第１１延在部とを有し、
前記第１０延在部が、前記第６延在部の先端側に基端が接続され、
前記第１１延在部が、前記第６延在部の基端側に向けて延在し先端が開放端となっていることを特徴とするアンテナ装置。 An insulating substrate body, and a first element , a second element, and a third element , each of which is patterned with a metal foil on the surface of the substrate body,
The first element has a power supply point connected to the base end side and a first extension portion extending toward any one side of the substrate body, and a base end side at a tip of the first extension portion. A second extension portion connected and extending in a direction perpendicular to the first extension portion; and a base end connected to a distal end of the second extension portion; and the first extension along the first extension portion. A third extending portion extending toward the proximal end side of the existing portion; and from the distal end of the third extending portion toward the proximal end side of the second extending portion along the second extending portion. A fourth extending portion that extends, and a fifth extending portion that has a proximal end connected to the distal end of the fourth extending portion, extends along the first extending portion, and has the other end connected to the ground. Have
The second element has a sixth extension portion extending from the base end of the second extension portion toward the one side, and a base end connected to a tip end of the sixth extension portion, and the second extension. A seventh extension part extending toward the tip side of the second extension part along the part ,
The third element has a tenth extending portion whose proximal end is connected to at least one of the sixth extending portion and the first extending portion and extending in a direction opposite to the seventh extending portion side; An eleventh extension extending from the tip of the tenth extension along the sixth extension;
The tenth extending portion has a proximal end connected to the distal end side of the sixth extending portion,
The antenna device according to claim 11, wherein the eleventh extending portion extends toward a base end side of the sixth extending portion, and a distal end is an open end .
前記第１エレメントが、基端側に給電点が接続されると共に前記基板本体のいずれかの一辺に向けて延在する第１延在部と、前記第１延在部の先端に基端側が接続され前記第１延在部に直交する方向に延在する第２延在部と、前記第２延在部の先端に基端が接続され前記第１延在部に沿って前記第１延在部の基端側に向けて延在する第３延在部と、前記第３延在部の先端から前記第２延在部に沿って前記第２延在部の基端側に向けて延在する第４延在部と、前記第４延在部の先端に基端が接続され前記第１延在部に沿って延在し他端側がグランドに接続される第５延在部とを有し、
前記第２エレメントが、前記第２延在部の基端から前記一辺に向けて延在する第６延在部と、前記第６延在部の先端に基端が接続され前記第２延在部に沿って前記第２延在部の先端側に向けて延在する第７延在部とを有し、
前記第３エレメントが、前記第６延在部及び前記第１延在部の少なくとも一方に基端が接続され前記第７延在部側とは逆方向に延在する第１０延在部と、前記第１０延在部の先端から前記第６延在部に沿って延在する第１１延在部とを有し、
前記第１０延在部が、前記第１延在部に基端が接続され、
前記第１１延在部が、前記第６延在部の先端側に向けて延在し先端が開放端となっていることを特徴とするアンテナ装置。 An insulating substrate body, and a first element , a second element, and a third element , each of which is patterned with a metal foil on the surface of the substrate body,
The first element has a power supply point connected to the base end side and a first extension portion extending toward any one side of the substrate body, and a base end side at a tip of the first extension portion. A second extension portion connected and extending in a direction perpendicular to the first extension portion; and a base end connected to a distal end of the second extension portion; and the first extension along the first extension portion. A third extending portion extending toward the proximal end side of the existing portion; and from the distal end of the third extending portion toward the proximal end side of the second extending portion along the second extending portion. A fourth extending portion that extends, and a fifth extending portion that has a proximal end connected to the distal end of the fourth extending portion, extends along the first extending portion, and has the other end connected to the ground. Have
The second element has a sixth extension portion extending from the base end of the second extension portion toward the one side, and a base end connected to a tip end of the sixth extension portion, and the second extension. A seventh extension part extending toward the tip side of the second extension part along the part ,
The third element has a tenth extending portion whose proximal end is connected to at least one of the sixth extending portion and the first extending portion and extending in a direction opposite to the seventh extending portion side; An eleventh extension extending from the tip of the tenth extension along the sixth extension;
The tenth extension part is connected to the first extension part at a proximal end,
The antenna device according to claim 11, wherein the eleventh extending portion extends toward a distal end side of the sixth extending portion, and the distal end is an open end .
前記第１エレメントが、基端側に給電点が接続されると共に前記基板本体のいずれかの一辺に向けて延在する第１延在部と、前記第１延在部の先端に基端側が接続され前記第１延在部に直交する方向に延在する第２延在部と、前記第２延在部の先端に基端が接続され前記第１延在部に沿って前記第１延在部の基端側に向けて延在する第３延在部と、前記第３延在部の先端から前記第２延在部に沿って前記第２延在部の基端側に向けて延在する第４延在部と、前記第４延在部の先端に基端が接続され前記第１延在部に沿って延在し他端側がグランドに接続される第５延在部とを有し、
前記第２エレメントが、前記第２延在部の基端から前記一辺に向けて延在する第６延在部と、前記第６延在部の先端に基端が接続され前記第２延在部に沿って前記第２延在部の先端側に向けて延在する第７延在部とを有し、
前記第３エレメントが、前記第６延在部及び前記第１延在部の少なくとも一方に基端が接続され前記第７延在部側とは逆方向に延在する第１０延在部と、前記第１０延在部の先端から前記第６延在部に沿って延在する第１１延在部とを有し、
前記第１０延在部が、前記第６延在部の先端側に基端が接続されたものと、前記第１延在部に基端が接続されたものとの一対設けられ、
前記第１１延在部が、一対の前記第１０延在部の一方に基端が接続され他方に先端が接続されていることを特徴とするアンテナ装置。 An insulating substrate body, and a first element , a second element, and a third element , each of which is patterned with a metal foil on the surface of the substrate body,
The first element has a power supply point connected to the base end side and a first extension portion extending toward any one side of the substrate body, and a base end side at a tip of the first extension portion. A second extension portion connected and extending in a direction perpendicular to the first extension portion; and a base end connected to a distal end of the second extension portion; and the first extension along the first extension portion. A third extending portion extending toward the proximal end side of the existing portion; and from the distal end of the third extending portion toward the proximal end side of the second extending portion along the second extending portion. A fourth extending portion that extends, and a fifth extending portion that has a proximal end connected to the distal end of the fourth extending portion, extends along the first extending portion, and has the other end connected to the ground. Have
The second element has a sixth extension portion extending from the base end of the second extension portion toward the one side, and a base end connected to a tip end of the sixth extension portion, and the second extension. A seventh extension part extending toward the tip side of the second extension part along the part ,
The third element has a tenth extending portion whose proximal end is connected to at least one of the sixth extending portion and the first extending portion and extending in a direction opposite to the seventh extending portion side; An eleventh extension extending from the tip of the tenth extension along the sixth extension;
The tenth extending portion is provided with a pair of a base end connected to the distal end side of the sixth extending portion and a base end connected to the first extending portion,
The antenna device according to claim 11, wherein the eleventh extending portion has a proximal end connected to one of the pair of tenth extending portions and a distal end connected to the other .
前記第２エレメントが、前記第６延在部と前記第７延在部とを接続する第８延在部と第９延在部とを有し、
前記第８延在部が、前記第６延在部の先端に基端が接続され前記第２延在部に沿って前記第２延在部の先端側に向けて延在し、
前記第９延在部が、前記第８延在部の先端に基端が接続され前記第６延在部に沿って前記第６延在部の基端側に向けて延在し先端が前記第７延在部の基端に接続されていることを特徴とするアンテナ装置。 In the antenna device according to any one of claims 1 to 3 ,
The second element has an eighth extension part and a ninth extension part that connect the sixth extension part and the seventh extension part,
The eighth extension portion is connected to a tip end of the sixth extension portion, and extends toward the tip end side of the second extension portion along the second extension portion,
The ninth extending portion has a proximal end connected to the distal end of the eighth extending portion, extends toward the proximal end side of the sixth extending portion along the sixth extending portion, and the distal end is An antenna device, wherein the antenna device is connected to a proximal end of a seventh extending portion.
前記第７延在部の途中に誘電体アンテナのアンテナ素子が接続されていることを特徴とするアンテナ装置。 In the antenna device according to any one of claims 1 to 4 ,
An antenna device, wherein an antenna element of a dielectric antenna is connected in the middle of the seventh extending portion.
前記第７延在部に第１受動素子が接続されていることを特徴とするアンテナ装置。 In the antenna device according to any one of claims 1 to 5 ,
An antenna device, wherein a first passive element is connected to the seventh extending portion.
前記第１０延在部に第２受動素子が接続されていることを特徴とするアンテナ装置。 In the antenna device according to any one of claims 1 to 6 ,
An antenna device, wherein a second passive element is connected to the tenth extending portion.
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