JP2007329975A - Antenna system - Google Patents

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JP2007329975A
JP2007329975A JP2007238107A JP2007238107A JP2007329975A JP 2007329975 A JP2007329975 A JP 2007329975A JP 2007238107 A JP2007238107 A JP 2007238107A JP 2007238107 A JP2007238107 A JP 2007238107A JP 2007329975 A JP2007329975 A JP 2007329975A
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ground plane
power feeding
pattern
antenna
unit
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JP4234764B2 (en
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Masahiro Yanagi
政宏 柳
Shigemi Kurashima
茂美 倉島
Hiroto Inoue
洋人 井上
Takuya Uchiyama
卓也 内山
Junichi Akama
淳一 赤間
Noboru Fujii
昇 藤井
Takashi Arita
隆 有田
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Fujitsu Component Ltd
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Fujitsu Component Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an antenna system including a flat ground plane and a feed conductor extended at a prescribed angle by a prescribed length from the ground plane in a direction orthogonal to the ground plane, and in particular, to provide a downsized antenna system with a low profile having a simplified configuration. <P>SOLUTION: The antenna system of the present invention includes a flat ground plane constituted of a conductive pattern formed on a circuit board and including a non-conductive part formed to be a shape in response to frequency characteristics, and a flat feed conductor constituted of a conductive pattern formed on the circuit board and including a triangular pattern extending from the ground plane at a prescribed angle and a circular pattern of which a circumference is coupled to the triangular pattern. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明はアンテナ装置に係り、特に、平板状の地板と、地板に直交する方向に、地板から所定の角度で、かつ、所定の長さだけ地板から延出した給電体とを有するアンテナ装置に関する。   The present invention relates to an antenna device, and more particularly, to an antenna device having a flat ground plate and a feeder that extends from the ground plate at a predetermined angle and a predetermined length in a direction orthogonal to the ground plate. .

近年、レーダー測位や大伝送容量の通信が可能であることからＵＷＢ（ultra-wide band）を利用した無線通信技術が注目されている。ＵＷＢは、２００２年に米国ＦＣＣ（federal communication commission）により周波数帯域が３．１〜１０．６ＧＨｚでの使用が認可された。   In recent years, wireless communication technology using UWB (ultra-wide band) has attracted attention because radar positioning and communication with a large transmission capacity are possible. UWB was approved for use in the frequency band of 3.1 to 10.6 GHz by the US FCC (federal communication commission) in 2002.

ＵＷＢは、パルス信号を広い帯域の周波数で発信して通信を行う。このため、ＵＷＢに用いられるアンテナには広帯域で受信が可能な構造が求められている。   UWB performs communication by transmitting a pulse signal at a wide frequency band. For this reason, an antenna used for UWB is required to have a structure capable of receiving in a wide band.

少なくともＦＣＣで認可された３．１〜１０．６ＧＨｚの周波数帯域での使用を目的としたアンテナとして、地板と給電他から構成されたアンテナが提案されている（非特許文献１）。   As an antenna intended for use in a frequency band of 3.1 to 10.6 GHz approved by at least FCC, an antenna composed of a ground plane and a power feed and the like has been proposed (Non-Patent Document 1).

図１は従来のアンテナの一例の構成図、図２は従来のアンテナ装置の一例のブロック構成図を示す。   FIG. 1 is a block diagram of an example of a conventional antenna, and FIG. 2 is a block diagram of an example of a conventional antenna device.

図１（Ａ）に示すアンテナ１０は地板１１上に、円錐を反転させた形状の給電体１２を配置した構成とされている。   The antenna 10 shown in FIG. 1A has a structure in which a power feeding body 12 having a shape in which a cone is inverted is disposed on a ground plane 11.

なお、給電体１２を構成する円錐は、その側面が地板１１の表面に対して角度θとなるように設定されている。この角度θによって所望能特性が得られる。   In addition, the cone which comprises the electric power feeding body 12 is set so that the side surface may become angle (theta) with respect to the surface of the ground plane 11. FIG. Desired performance characteristics can be obtained by this angle θ.

図１（Ｂ）に示すアンテナ２０は地板１１上に、円錐体２２ａとそれに内接する球体２２ｂとから構成される涙滴状の給電体２２を配置した構成とされている。   The antenna 20 shown in FIG. 1 (B) has a configuration in which a teardrop-shaped power feeding body 22 composed of a cone 22a and a sphere 22b inscribed therein is arranged on the ground plane 11.

このとき、アンテナ１０、２０の給電体１２は、図２に示すようにフィルタ３１に接続されている。フィルタ３１は、給電体１２で受信した電波のうち、所望の周波数帯域の成分を抽出する。フィルタ３１で抽出された成分は、送受信ユニット３２に供給される。送受信ユニット３２は、受信電波の前処理或いは後処理となる信号処理を行う。
２００３年 電子情報通信学会 B-1-133 FCC認可UWB周波数帯の水平面内無指向性・低VSWRアンテナ、谷口琢也・小林岳彦（東京電機大）（３月22日発表 B201教室） At this time, the power feeders 12 of the antennas 10 and 20 are connected to the filter 31 as shown in FIG. The filter 31 extracts a component in a desired frequency band from the radio wave received by the power feeder 12. The component extracted by the filter 31 is supplied to the transmission / reception unit 32. The transmission / reception unit 32 performs signal processing as preprocessing or postprocessing of received radio waves.
2003 IEICE B-1-133 Non-directional, low VSWR antenna in horizontal plane of FCC approved UWB frequency band, Shinya Taniguchi, Takehiko Kobayashi (Tokyo Denki Univ.) (March 22 B201 classroom)

しかるに、従来の広帯域アンテナ装置は、アンテナのほかに送信電波を選別するためのフィルタを設ける必要があった。   However, the conventional broadband antenna device has to be provided with a filter for selecting the transmission radio wave in addition to the antenna.

本発明は上記の点に鑑みてなされたもので、構成を簡略化でき、小型、薄型の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 points, and an object of the present invention is to provide a small and thin antenna device that can be simplified in configuration.

本発明のアンテナ装置は、回路基板上に形成された導電パターンで構成され、周波数特性に応じた形状の非導電部有する平板状の地板部と、前記回路基板上に形成された導電パターンで構成され、前記地板部から所定の角度で延出する三角形パターンと、当該三角形パターンに円周が結合される円形パターンとを有する平板状の給電部とを含む。   The antenna device of the present invention is composed of a conductive pattern formed on a circuit board, and is composed of a flat base plate having a non-conductive part having a shape corresponding to frequency characteristics, and a conductive pattern formed on the circuit board. And a flat plate-like power feeding part having a triangular pattern extending from the ground plane part at a predetermined angle and a circular pattern having a circumference coupled to the triangular pattern.

また、前記給電部は、前記中心線の方向に配線される給電パターンを有し、前記地板部は、前記給電パターンを貫通させるための貫通部を含んでもよい。   In addition, the power feeding unit may include a power feeding pattern wired in the direction of the center line, and the ground plane may include a penetrating part for penetrating the power feeding pattern.

また、前記地板部は、前記回路基板に前記給電部が形成される面の裏面に配設されてもよい。   Further, the ground plane part may be disposed on the back surface of the surface on which the power feeding part is formed on the circuit board.

本発明によれば、地板に、周波数特性に応じた形状に成形された非導電部を設けることにより、地板と給電体との電磁的な相互作用により、所望の周波数成分を抽出でき、後段にフィルタを設ける必要がなくなり、装置の構成を簡略化できるなどの特長を有する。   According to the present invention, a desired frequency component can be extracted by an electromagnetic interaction between the ground plane and the power feeder by providing the ground plane with a non-conductive portion formed in a shape corresponding to the frequency characteristics. There is no need to provide a filter, and the configuration of the apparatus can be simplified.

〔第１実施例〕
図３は本発明の第１実施例の構成図を示す。 [First embodiment]
FIG. 3 is a block diagram of the first embodiment of the present invention.

本実施例のアンテナ装置１００は、アンテナ１０１及び送信ユニット１０２から構成される。   The antenna device 100 according to the present embodiment includes an antenna 101 and a transmission unit 102.

図４はアンテナ１０１の構成図を示す。   FIG. 4 shows a configuration diagram of the antenna 101.

アンテナ１０１は、給電体１１１、地板１１２から構成されている。給電体１１１は、金属などの導電材から構成されており、球体部１１１ａ、円錐部１１１ｂ、給電部１１１ｃを一体的に成形した構成とされている。球体部１１１ａは、円錐部１１１ｂの底面側に配置されている。球体部１１１ａは、円錐部１１１ｂの底面に埋め込まれるように成形されている。   The antenna 101 includes a power feeder 111 and a ground plane 112. The power feeding body 111 is made of a conductive material such as metal, and has a configuration in which a spherical body portion 111a, a conical portion 111b, and a power feeding portion 111c are integrally formed. The spherical portion 111a is disposed on the bottom surface side of the conical portion 111b. The spherical portion 111a is shaped to be embedded in the bottom surface of the conical portion 111b.

円錐部１１１ｂは、その側面が地板１１２の表面に対して角度θとなるように設定されている。給電部１１１ｃは、円錐部１１１ｂの頂点から矢印Ｚ１方向に延出されている。給電部１１１ｃは、地板１１２の表面側から中心穴１１２ａを貫通して、地板１１２の裏面側に延出される。給電部１１１ｃは、地板１１２の裏面側で送信ユニット１０２に接続される。   The conical portion 111 b is set such that its side surface is at an angle θ with respect to the surface of the main plate 112. The power feeding part 111c extends in the arrow Z1 direction from the apex of the conical part 111b. The power feeding portion 111 c extends from the front surface side of the ground plate 112 through the center hole 112 a and extends to the back surface side of the ground plate 112. The power feeding unit 111 c is connected to the transmission unit 102 on the back side of the ground plane 112.

地板１０１は、略円盤状に形成された導電体から構成されおり、接地されている。地板１０１の中心部には、表面側と裏面側とを貫通する中心孔１１２ａが形成されている。中心孔１１２ａには、給電体１１１の給電部１１１ｃが貫通する。このとき、給電部１１１ｃと中心孔１１２ａとの間には、絶縁体が間挿され、給電体１１１と地板１１２とは絶縁状態に維持される。   The ground plane 101 is made of a conductor formed in a substantially disk shape and is grounded. A central hole 112 a that penetrates the front surface side and the back surface side is formed at the center of the main plate 101. The power feeding portion 111c of the power feeding body 111 passes through the center hole 112a. At this time, an insulator is inserted between the power feeding portion 111c and the center hole 112a, and the power feeding body 111 and the ground plane 112 are maintained in an insulated state.

また、地板１０１には、中心から半径ｒ１の円周上に幅ｗ１の貫通孔１１１ｂが形成されている。貫通孔１１１ｂの内周側と外周側とは９０°毎に設けられたブリッジ部１１１ｃにより結合されている。ブリッジ部１１１ｃにより貫通孔１１１ｂの内周側と外周側とが分離することが防止されている。アンテナ１０１は、給電体１１１と地板１１２との間に生じる電磁波が半径ｒ１及び幅ｗ１の貫通孔１１２ｂに影響されて、透過あるいは遮断する周波数帯域が決定される。   In addition, a through hole 111b having a width w1 is formed in the ground plane 101 on a circumference having a radius r1 from the center. The inner peripheral side and the outer peripheral side of the through hole 111b are coupled by a bridge portion 111c provided every 90 °. The bridge portion 111c prevents the inner peripheral side and the outer peripheral side of the through hole 111b from being separated. In the antenna 101, the frequency band through which the electromagnetic wave generated between the power feeder 111 and the ground plane 112 is transmitted or blocked is determined by the through hole 112b having the radius r1 and the width w1.

送信ユニット１０２は、給電体１１１に接続されており、給電体１１１に送信信号を供給する。   The transmission unit 102 is connected to the power supply body 111 and supplies a transmission signal to the power supply body 111.

図５はアンテナ１０１の周波数特性図を示す。図５において、横軸は周波数、縦軸はＶＳＷＲを示す。図５において、実線は地板１０１に貫通孔１１１ｂを有する構造における周波数特性、破線は、地板１０１に貫通孔１１１ｂが形成されていない構造における周波数特性を示す。   FIG. 5 shows a frequency characteristic diagram of the antenna 101. In FIG. 5, the horizontal axis represents frequency, and the vertical axis represents VSWR. In FIG. 5, the solid line indicates the frequency characteristic in the structure having the through hole 111 b in the ground plane 101, and the broken line indicates the frequency characteristic in the structure in which the through hole 111 b is not formed in the ground plane 101.

図５に示すように貫通孔１１２ｂを設けることにより、周波数ｆ１前後でＶＳＷＲが大きくなっていることがわかる。   As shown in FIG. 5, it can be seen that the VSWR is increased around the frequency f1 by providing the through hole 112b.

〔第２実施例〕
図６は本発明の第２実施例の構成図、図７はアンテナ２０１の構成図を示す。同図中、図３、図４と同一構成部分には同一符号を付し、その説明は省略する。 [Second Embodiment]
FIG. 6 is a configuration diagram of the second embodiment of the present invention, and FIG. 7 is a configuration diagram of the antenna 201. In the figure, the same components as those in FIGS. 3 and 4 are denoted by the same reference numerals, and the description thereof is omitted.

本実施例のアンテナ装置２００は、アンテナ２０１の構成が第１実施例とは相違する。本実施例のアンテナ２０１は、図７に示すように貫通孔２０１ｂの幅がｗ２（>ｗ１）に拡大した構成とされている。貫通孔２１２ｂの幅をｗ２（>ｗ１）に拡大させることにより、周波数特性を第１実施例とは異なる特性とすることができる。   The antenna device 200 of the present embodiment is different from the first embodiment in the configuration of the antenna 201. The antenna 201 of the present embodiment has a configuration in which the width of the through hole 201b is expanded to w2 (> w1) as shown in FIG. By increasing the width of the through hole 212b to w2 (> w1), the frequency characteristic can be made different from that of the first embodiment.

図８はアンテナ２０１の周波数特性図を示す。図８において、横軸は周波数、縦軸はＶＳＷＲを示す。   FIG. 8 shows a frequency characteristic diagram of the antenna 201. In FIG. 8, the horizontal axis represents frequency and the vertical axis represents VSWR.

貫通孔１１１ｂの幅をｗ２（>ｗ１）に拡大させることにより、図７に示すように周波数ｆ２（<ｆ１）でＶＳＷＲが大きくなることがわかる。また、ＶＳＷＲの大きさも大きくなっていることがわかる。   It can be seen that by increasing the width of the through hole 111b to w2 (> w1), the VSWR increases at the frequency f2 (<f1) as shown in FIG. It can also be seen that the size of VSWR is also increased.

このように、貫通孔１１２ｂ、２１２ｂの幅ｗ１によって所望の周波数特性を得ることが可能である。したがって、本実施例によれば、フィルタなどを設けることなく、所望の周波数の電波を送信することが可能となる。   Thus, a desired frequency characteristic can be obtained by the width w1 of the through holes 112b and 212b. Therefore, according to the present embodiment, it is possible to transmit a radio wave having a desired frequency without providing a filter or the like.

このように、第１、第２実施例によれば、貫通孔１１２ｂ、２１２ｂのサイズを変更することにより、周波数特性を変更可能となる。   Thus, according to the first and second embodiments, the frequency characteristics can be changed by changing the sizes of the through holes 112b and 212b.

なお、貫通孔１１２ｂ、２１２ｂに導電体あるいは誘電体を挿入することにより、周波数特性を微調整することが可能となる。   The frequency characteristics can be finely adjusted by inserting a conductor or dielectric into the through holes 112b and 212b.

〔アンテナ装置の調整方法〕
図９は本発明の第１実施例の周波数特性の調整方法を説明するための図を示す。 [Method for adjusting antenna device]
FIG. 9 is a diagram for explaining a frequency characteristic adjusting method according to the first embodiment of the present invention.

図９（Ａ）に示すように貫通孔１１２ｂに導電体からなる導電体片１３１を測定結果などに応じて装着することにより、貫通孔１１２ｂの大きさを変えて、周波数特性を調整してもよい。本実施例によれば、貫通孔１１２ｂに導電体片１３１を装着することにより周波数特性の微調整を行うことができる。   As shown in FIG. 9A, the frequency characteristic can be adjusted by changing the size of the through hole 112b by attaching the conductor piece 131 made of a conductor to the through hole 112b according to the measurement result. Good. According to the present embodiment, the frequency characteristic can be finely adjusted by mounting the conductor piece 131 in the through hole 112b.

また、図９（Ｂ）に示すように貫通孔１１２ｂを樹脂などの誘電体からなるモールド樹脂１３２でモールドすることにより、周囲と誘電率が異ならせることができるため、波長短縮効果をもたせることができる。また、周波数特性を調整することも可能となる。   Further, as shown in FIG. 9B, by molding the through-hole 112b with a mold resin 132 made of a dielectric material such as a resin, the dielectric constant can be made different from that of the surroundings. it can. In addition, the frequency characteristics can be adjusted.

図１０は本発明の第１実施例の指向性の調整方法を説明するための図を示す。   FIG. 10 is a diagram for explaining the directivity adjustment method of the first embodiment of the present invention.

図１０に示すように貫通孔１１２ｂの形状と貫通孔１３３の形状とを非対称とすることにより、アンテナの特性を方向により不平衡にすることができるため、送出電波の指向性を調整することが可能となる。   As shown in FIG. 10, by making the shape of the through hole 112b and the shape of the through hole 133 asymmetric, the characteristics of the antenna can be unbalanced depending on the direction, so that the directivity of the transmitted radio wave can be adjusted. It becomes possible.

〔第３実施例〕
図１１は本発明の第３実施例の斜視図、図１２は本発明の第３実施例の構成図を示す。 [Third embodiment]
FIG. 11 is a perspective view of a third embodiment of the present invention, and FIG. 12 is a block diagram of the third embodiment of the present invention.

本実施例のアンテナ装置３００は、給電部３０１、地板部３０２、送信ユニット部３０３をプリント配線板３０４上に搭載した構成とされている。   The antenna device 300 according to the present embodiment has a configuration in which a power feeding unit 301, a ground plane unit 302, and a transmission unit unit 303 are mounted on a printed wiring board 304.

給電部３０１は、プリント配線板３０４上に導電パターン３１１により形成されている。導電パターン３１１は、図３、図４に示すアンテナ１０１の中心部を地板１０２に直交する面で切断した切断面の形状に相当しており、円形パターン３２１、三角形パターン３２２、給電パターン３２３から構成される。円形パターン３２１は、第１、第２実施例の給電部１１１の球体部１１１ａに相当した部位であり、その円周の一部が三角部３２２の底辺側と結合された形状とされている。   The power feeding unit 301 is formed by a conductive pattern 311 on the printed wiring board 304. The conductive pattern 311 corresponds to the shape of a cut surface obtained by cutting the central portion of the antenna 101 shown in FIGS. 3 and 4 with a plane orthogonal to the ground plane 102, and includes a circular pattern 321, a triangular pattern 322, and a feeding pattern 323. Is done. The circular pattern 321 is a part corresponding to the sphere part 111a of the power feeding part 111 of the first and second embodiments, and a part of the circumference is combined with the bottom side of the triangular part 322.

三角形パターン３２２は、第１、第２実施例の給電部１１１の円錐部１１１ｂに相当した部位であり、頂点が地板部３０２に対向するように配置されている。給電パターン３２３は、三角形パターン３２２の頂点と送信ユニット部３０３との間に地板部３０２とは絶縁された状態で配線されており、送信ユニット部３０３から出力された送信信号を給電部１１１に供給するパターンである。   The triangular pattern 322 is a part corresponding to the conical part 111 b of the power feeding part 111 of the first and second embodiments, and is arranged so that the vertex faces the ground plane part 302. The power feeding pattern 323 is wired between the apex of the triangular pattern 322 and the transmission unit unit 303 in a state of being insulated from the ground plane unit 302, and supplies the transmission signal output from the transmission unit unit 303 to the power feeding unit 111. Pattern.

地板部３０２は、給電部３０１と送信ユニット部３０３との間に長さＬ31、幅Ｗ31に亘って形成されている。地板部３０２には、送信電波の周波数を選別するためのフィルタ部３３１と給電パターン３２３を貫通させるための貫通部３３２を含む構成とされている。   The ground plane 302 is formed across the length L31 and the width W31 between the power feeding unit 301 and the transmission unit 303. The ground plane 302 includes a filter portion 331 for selecting the frequency of the transmission radio wave and a penetration portion 332 for penetrating the power feeding pattern 323.

フィルタ部３３１は非導電パターンであり、地板部３０２の略中央に長さＬ32に亘って形成されている。フィルタ部３３１により、地板部３０２と給電部３０１との間の電磁的な相互作用が影響され、特定の周波数成分でＶＳＷＲが変化する。   The filter portion 331 is a non-conductive pattern, and is formed over the length L32 at the approximate center of the ground plane portion 302. The filter unit 331 affects the electromagnetic interaction between the ground plane unit 302 and the power feeding unit 301, and the VSWR changes at a specific frequency component.

図１３は本発明の第３実施例の周波数特性図を示す。同図中、横軸は周波数、縦軸はＶＳＷＲを示す。   FIG. 13 shows a frequency characteristic diagram of the third embodiment of the present invention. In the figure, the horizontal axis represents frequency and the vertical axis represents VSWR.

図１３に示す特性は、Ｌ31＝２５ｍｍ、Ｌ32＝７ｍｍ、Ｗ31＝５０ｍｍとしたときの、特性である。本実施例によれば、図１３に示すように周波数ｆ31、ｆ32、ｆ33、ｆ34でＶＳＷＲが大きくなっており、特に周波数ｆ31、ｆ34でＶＳＷＲが特に大きくなっていることがわかる。   The characteristics shown in FIG. 13 are characteristics when L31 = 25 mm, L32 = 7 mm, and W31 = 50 mm. According to this embodiment, as shown in FIG. 13, the VSWR is increased at the frequencies f31, f32, f33, and f34, and the VSWR is particularly increased at the frequencies f31 and f34.

本実施例によれば、プリント配線板３０４上に導電パターン３２３でアンテナ装置３００を構成でき、さらに、送信ユニット部３０３もプリント配線板３０４上に搭載できるため、小型、薄型化が可能となる。   According to the present embodiment, the antenna device 300 can be configured with the conductive pattern 323 on the printed wiring board 304, and the transmission unit unit 303 can also be mounted on the printed wiring board 304, so that the size and thickness can be reduced.

〔第４実施例〕
図１４は本発明の第４実施例の斜視図、図１５は本発明の第４実施例の構成図を示す。 [Fourth embodiment]
FIG. 14 is a perspective view of a fourth embodiment of the present invention, and FIG. 15 is a block diagram of the fourth embodiment of the present invention.

本実施例のアンテナ装置４００は、地板部４０２をプリント配線板３０４の裏面側に配置した構成とされている。   The antenna device 400 of the present embodiment is configured such that the ground plane portion 402 is disposed on the back side of the printed wiring board 304.

地板部４０２は、プリント配線板３０４の裏面側において給電部３０１と送信ユニット部３０３との間に長さＬ31、幅Ｗ31に亘って形成されている。地板部３０２には、送信電波の周波数を選別するためのフィルタ部４３１を有する。   The ground plane portion 402 is formed across the length L31 and the width W31 between the power feeding portion 301 and the transmission unit portion 303 on the back side of the printed wiring board 304. The base plate unit 302 has a filter unit 431 for selecting the frequency of the transmission radio wave.

フィルタ部４３１は非導電パターンであり、地板部４０２の略中央に長さＬ32に亘って形成されている。フィルタ部４３１により、地板部４０２は、給電部３０１と電磁的に相互作用する。このとき、フィルタ部４３１により電磁的な相互作用が影響され、特定の周波数成分でＶＳＷＲが変化する。   The filter part 431 is a non-conductive pattern, and is formed in the approximate center of the ground plane part 402 over the length L32. By the filter unit 431, the ground plane unit 402 interacts electromagnetically with the power feeding unit 301. At this time, the electromagnetic interaction is affected by the filter unit 431, and the VSWR changes at a specific frequency component.

なお、本実施例では、Ｌ31＝２５ｍｍ、Ｌ32＝７ｍｍ、Ｗ31＝５０ｍｍとしたとき、図１１と略同様な周波数特性を示す。   In this example, when L31 = 25 mm, L32 = 7 mm, and W31 = 50 mm, the frequency characteristics are substantially the same as those in FIG.

〔第５実施例〕
図１６は本発明の第５実施例の斜視図、図１７は本発明の第５実施例の構成図を示す。 [Fifth embodiment]
FIG. 16 is a perspective view of a fifth embodiment of the present invention, and FIG. 17 is a block diagram of the fifth embodiment of the present invention.

本実施例のアンテナ装置５００は、給電部５０１、地板部５０２、送信ユニット部５０３から構成される。   The antenna device 500 according to the present embodiment includes a power feeding unit 501, a ground plane unit 502, and a transmission unit unit 503.

給電部５０１及び地板部５０２は、プリント配線板５０４上に厚さｔの導電パターンにより形成されている。給電部５０１は、第３、第４実施例の給電部３０１の円形部３２１を矢印Ｙ方向の両端で、矢印Ｘ方向に平行に切断した形状とされている。給電部５０１は、長さＬ51、幅Ｗ51とされている。   The power feeding portion 501 and the ground plane portion 502 are formed on the printed wiring board 504 with a conductive pattern having a thickness t. The power feeding part 501 has a shape obtained by cutting the circular part 321 of the power feeding part 301 of the third and fourth embodiments at both ends in the arrow Y direction in parallel with the arrow X direction. The power feeding unit 501 has a length L51 and a width W51.

給電部５０１は、三角形部３２２の頂点が給電点ｐとされており、この給電点ｐに送信ユニット部５０３が接続されている。   In the power supply unit 501, the apex of the triangular part 322 is a power supply point p, and the transmission unit unit 503 is connected to the power supply point p.

地板部５０２は、長さＬ52、幅Ｗ52に亘って形成され、接地に接続されている。地板部５０２には、給電点ｐを中心として矢印Ｙ方向の両側に凹部５３１、５３２が形成されている。   The ground plane part 502 is formed over the length L52 and the width W52, and is connected to the ground. Concave parts 531 and 532 are formed on both sides in the arrow Y direction around the feeding point p in the ground plane part 502.

凹部５３１、５３２は、地板部５０２の中心から幅Ｗ53の外側と幅Ｗ54の内側との間に形成されている。地板部５０２は、給電部５０１と電磁的に相互作用する。このとき、凹部５３１、５３２により地板部５０２と給電部５０１とでの電磁的な相互作用が影響され、特定の周波数成分でＶＳＷＲが変化する。   The concave portions 531 and 532 are formed between the outside of the width W53 and the inside of the width W54 from the center of the main plate portion 502. The ground plane part 502 interacts electromagnetically with the power feeding part 501. At this time, the electromagnetic interaction in the ground plane part 502 and the electric power feeding part 501 is influenced by the recessed parts 531, 532, and VSWR changes with a specific frequency component.

図１８は本発明の第５実施例の周波数特性図を示す。同図中、横軸は周波数、縦軸はＶＳＷＲを示す。   FIG. 18 is a frequency characteristic diagram of the fifth embodiment of the present invention. In the figure, the horizontal axis represents frequency and the vertical axis represents VSWR.

図１８に示す特性は、ｔ＝０．８ｍｍ、Ｌ51＝２５．１ｍｍ、Ｌ52＝２５．０ｍｍ、Ｌ53＝１２．５ｍｍ、Ｗ51＝１６ｍｍ、Ｗ52＝５０ｍｍ、Ｗ53＝５ｍｍ、Ｗ54＝１０ｍｍとしたときの周波数特性である。本実施例によれば、図１８に示すように周波数ｆ51〜ｆ52の周波数帯域でＶＳＷＲが大きくなっていることがわかる。   The characteristics shown in FIG. 18 are obtained when t = 0.8 mm, L51 = 25.1 mm, L52 = 25.0 mm, L53 = 12.5 mm, W51 = 16 mm, W52 = 50 mm, W53 = 5 mm, and W54 = 10 mm. It is a frequency characteristic. According to the present embodiment, it can be seen that the VSWR is increased in the frequency band of the frequencies f51 to f52 as shown in FIG.

従来のアンテナ装置の一例の構成図である。It is a block diagram of an example of the conventional antenna device. 従来のアンテナ装置の一例のブロック構成図である。It is a block block diagram of an example of the conventional antenna device. 本発明の第１実施例の構成図である。It is a block diagram of 1st Example of this invention. アンテナ１０１の構成図である。1 is a configuration diagram of an antenna 101. FIG. アンテナ１０１の周波数特性図である。3 is a frequency characteristic diagram of an antenna 101. FIG. 本発明の第２実施例の構成図である。It is a block diagram of 2nd Example of this invention. アンテナ２０１の構成図である。1 is a configuration diagram of an antenna 201. FIG. アンテナ２０１の周波数特性図である。6 is a frequency characteristic diagram of an antenna 201. FIG. 本発明の第１実施例の周波数特性の調整方法を説明するための図である。It is a figure for demonstrating the adjustment method of the frequency characteristic of 1st Example of this invention. 本発明の第１実施例の指向性の調整方法を説明するための図である。It is a figure for demonstrating the directivity adjustment method of 1st Example of this invention. 本発明の第３実施例の斜視図である。It is a perspective view of 3rd Example of this invention. 本発明の第３実施例の構成図である。It is a block diagram of 3rd Example of this invention. 本発明の第３実施例の周波数特性図である。It is a frequency characteristic figure of 3rd Example of this invention. 本発明の第４実施例の斜視図である。It is a perspective view of 4th Example of this invention. 本発明の第４実施例の構成図である。It is a block diagram of 4th Example of this invention. 本発明の第５実施例の斜視図である。It is a perspective view of 5th Example of this invention. 本発明の第５実施例の構成図である。It is a block diagram of 5th Example of this invention. 本発明の第５実施例の周波数特性図である。It is a frequency characteristic figure of 5th Example of this invention.

符号の説明Explanation of symbols

１００、２００、３００、４００、５００ アンテナ装置
１０１、２０１ アンテナ
１１１ 給電体、１１２ 地板
１１１ａ 球体部、１１１ｂ 円錐部、１１１ｃ 給電部
１１２ａ 中心孔、１１２ｂ、２１２ｂ 貫通孔、１１２ｃ ブリッジ部
１３１ 導電体片、１３２ モールド樹脂、１３３ 貫通孔
３０１ 給電部、３０２、４０２ 地板部、３０３ 送信ユニット部
３１１ 導電パターン、
３２１ 円形パターン、３２２ 三角形パターン、３２３ 給電パターン 100, 200, 300, 400, 500 Antenna device 101, 201 Antenna 111 Feeder, 112 Ground plate 111a Spherical part, 111b Conical part, 111c Feeder 112a Center hole, 112b, 212b Through-hole, 112c Bridge part 131 Conductor piece, 132 Mold resin, 133 Through-hole 301 Power supply part, 302, 402 Base plate part, 303 Transmission unit part 311 Conductive pattern,
321 Circular pattern, 322 Triangular pattern, 323 Power feeding pattern

Claims (3)

回路基板上に形成された導電パターンで構成され、周波数特性に応じた形状の非導電部有する平板状の地板部と、
前記回路基板上に形成された導電パターンで構成され、前記地板部から所定の角度で延出する三角形パターンと、当該三角形パターンに円周が結合される円形パターンとを有する平板状の給電部と
を含む、アンテナ装置。 A plate-shaped ground plane part having a non-conductive part having a shape corresponding to a frequency characteristic, which is composed of a conductive pattern formed on a circuit board,
A plate-shaped power feeding portion that is formed of a conductive pattern formed on the circuit board and has a triangular pattern extending from the ground plane portion at a predetermined angle, and a circular pattern having a circumference coupled to the triangular pattern; Including an antenna device. 前記給電部は、前記中心線の方向に配線される給電パターンを有し、
前記地板部は、前記給電パターンを貫通させるための貫通部を含む、請求項１に記載のアンテナ装置。 The power feeding unit has a power feeding pattern wired in the direction of the center line,
The antenna device according to claim 1, wherein the ground plane includes a penetrating portion for penetrating the power feeding pattern. 前記地板部は、前記回路基板に前記給電部が形成される面の裏面に配設される、請求項１又は２に記載のアンテナ装置。   The antenna device according to claim 1, wherein the ground plane portion is disposed on a back surface of a surface on which the power feeding portion is formed on the circuit board.
JP2007238107A 2007-09-13 2007-09-13 Antenna device Expired - Fee Related JP4234764B2 (en)

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