JP2007221344A - Antenna system, ic loaded with same and portable terminal loaded with antenna system - Google Patents

Antenna system, ic loaded with same and portable terminal loaded with antenna system Download PDF

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JP2007221344A
JP2007221344A JP2006038194A JP2006038194A JP2007221344A JP 2007221344 A JP2007221344 A JP 2007221344A JP 2006038194 A JP2006038194 A JP 2006038194A JP 2006038194 A JP2006038194 A JP 2006038194A JP 2007221344 A JP2007221344 A JP 2007221344A
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ground plane
antenna device
feeding
point
conductor ground
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Takayoshi Ito
敬義 伊藤
Shuichi Sekine
秀一 関根
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Toshiba Corp
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Toshiba Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an antenna system capable of widely securing a radiation area without damaging a wide band characteristic even when the low posture of an antenna element is advanced. <P>SOLUTION: A feeding point 2 is formed on a corner part of a rectangular conductor ground plate 1 in the antenna system, an L-shaped feeding element 4 is arranged along two adjacent sides of the rectangular conductor ground plate 1 through the corner part on which the feeding point 2 is arranged and the feeding point 2 is connected to the feeding element 4 by a feeder line 3. When the relation of the width (a) and height (b) of the rectangular conductor ground plate 1, the element length (c) of the feeder line 3, and a distance (d) from a connection point between the feeding element 4 and the feeder line 3 up to the tip of the feeding element 4 is set as a + b + c + d = λa/2, a + b = λb/2, and a + b + c + d = λc, the antenna system can obtain a wide band characteristic resonating with the frequencies of wavelengths λa,λb,λc even when the element length (c) of the feeder line 3 is shortened and radio waves can be radiated not only from the feeding element 4 but also from the rectangular conductor ground plate 1. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、低姿勢な形状で広帯域特性を持つアンテナ装置、そのアンテナ装置を実装したアンテナ装置を搭載したIC、およびそのアンテナ装置を搭載した携帯端末に関する。   The present invention relates to an antenna device having a low-profile shape and broadband characteristics, an IC on which an antenna device on which the antenna device is mounted, and a mobile terminal on which the antenna device is mounted.

近年、テレビ放送を受信できる携帯電話機など、複数の周波数帯域信号を送受信できる携帯無線機が開発されている。これに伴い、携帯無線機に搭載されるアンテナ装置として広帯域特性を持つものが求められている。また同時に、携帯無線機の小型化やデザイン性の観点から、携帯無線機に内蔵することができる小型アンテナ装置が求められている。   In recent years, portable radio devices capable of transmitting and receiving a plurality of frequency band signals, such as mobile phones capable of receiving television broadcasts, have been developed. Along with this, an antenna device mounted on a portable wireless device is required to have a broadband characteristic. At the same time, there is a need for a small antenna device that can be built into a portable wireless device from the viewpoint of miniaturization and design of the portable wireless device.

小型アンテナ装置として、低姿勢であるアンテナ素子を用いたものが知られている。ここで、アンテナ素子が低姿勢であるとは、アンテナ装置の地板からアンテナ素子の先端までの高さが、直線状モノポールアンテナ素子に比べ低いことである。例えば低姿勢であるアンテナ素子として、給電逆L字型素子や給電T字型素子などが知られている。   As a small antenna device, one using a low-profile antenna element is known. Here, the low attitude of the antenna element means that the height from the ground plane of the antenna device to the tip of the antenna element is lower than that of the linear monopole antenna element. For example, as a low-profile antenna element, a feed reverse L-shaped element, a feed T-shaped element, and the like are known.

この給電T字型素子を用いて広帯域特性を実現したアンテナ装置として、導体地板上に給電点を介して設置された給電T字型素子と、2つの無給電逆L字状素子を有したものがある(例えば、特許文献1参照)。   As an antenna device that realizes wideband characteristics using this feeding T-shaped element, it has a feeding T-shaped element installed on a conductive ground plane via a feeding point and two parasitic non-feeding L-shaped elements (For example, refer to Patent Document 1).

このアンテナ装置の無給電逆L字状素子の一端は、給電点近傍の導体地板に接地されている。また無給電逆L字状素子は、この接地点と給電点との距離を保ったまま導体地板から垂直に伸び、その後給電T字型素子の水平導体を含む水平面と一定の距離を保つよう直角に折れ曲がった形状となっている。   One end of the parasitic L-shaped element of this antenna device is grounded to a conductor ground plane in the vicinity of the feeding point. The parasitic L-shaped element extends perpendicularly from the ground plane while maintaining the distance between the grounding point and the feeding point, and then perpendicular to the horizontal plane including the horizontal conductor of the feeding T-shaped element. It has a bent shape.

このように給電T字型素子の近傍に無給電逆L字状素子を配置することで、給電T字型素子からの誘導作用により無給電逆L字状素子にも電流が流れ、この無給電逆L字状素子からも電波が放射されるようになる。従って、アンテナ装置の周波数特性が、給電T字型素子だけでなく無給電逆L字状素子の素子長にも依存するようになり、広帯域特性が得られる。また低姿勢である給電T字型素子を用いることで、アンテナ装置を小型化することができる。
特開2004−207992公報(4頁、図1)
By disposing the parasitic reverse L-shaped element in the vicinity of the feeding T-shaped element in this way, a current also flows through the parasitic T-shaped element due to induction from the feeding T-shaped element. Radio waves are also emitted from the inverted L-shaped element. Accordingly, the frequency characteristic of the antenna device depends not only on the feed T-shaped element but also on the element length of the parasitic L-shaped element, so that a broadband characteristic can be obtained. In addition, the antenna device can be miniaturized by using a low-profile power-feeding T-shaped element.
JP 2004-207992 A (page 4, FIG. 1)

しかしながら、上述したアンテナ装置の給電T字型素子には、給電点から先端に向かって電流が流れるのに対し、導体地板には給電点に向かって電流が流れる。このため給電T字型素子の水平導体に流れる電流は、導体地板に流れる電流によって打ち消され、給電T字型素子の垂直導体のみが主として電波の放射に寄与する放射領域となる。   However, a current flows through the feeding T-shaped element of the antenna device described above from the feeding point toward the tip, whereas a current flows through the conductor ground plane toward the feeding point. For this reason, the current flowing through the horizontal conductor of the feeding T-shaped element is canceled by the current flowing through the conductor ground plane, and only the vertical conductor of the feeding T-shaped element becomes a radiation region mainly contributing to radio wave radiation.

そのため、特許文献1に記載されるアンテナ装置は、垂直導体を短くし給電T字型素子の低姿勢化を更に進めると、放射領域である垂直導体が狭くなるという問題があった。更にこのアンテナ装置は、給電逆T字型素子の低姿勢化を進めると、装置の放射抵抗が低下し広帯域特性が損なわれるという問題があった。   For this reason, the antenna device described in Patent Document 1 has a problem that when the vertical conductor is shortened and the posture of the feeding T-shaped element is further lowered, the vertical conductor serving as a radiation region becomes narrow. Furthermore, this antenna device has a problem that if the posture of the feed inverted T-shaped element is lowered, the radiation resistance of the device is lowered and the broadband characteristics are impaired.

そこで、本発明は、これらの問題点を解決するためになされたものであって、給電素子の低姿勢化を進めても広帯域特性が損なわれず、放射領域も広く確保できるアンテナ装置、そのアンテナ装置を実装したアンテナ装置を搭載したIC、およびそのアンテナ装置を搭載した携帯端末を提供することを目的とする。   Therefore, the present invention has been made to solve these problems, and an antenna device capable of ensuring a wide radiation area without deteriorating broadband characteristics even when the posture of the feed element is lowered, and the antenna device thereof An object of the present invention is to provide an IC equipped with an antenna device mounted with a portable terminal equipped with the antenna device.

上記目的を達成するために、本発明のアンテナ装置は、略直角の角部を少なくとも1つ有する導体地板と、前記導体地板の角部に設置された給電点と、前記導体地板の前記給電点に一端が接続された給電線と、素子の中点が前記給電線の他端に接続され、前記中点の両側素子が前記導体地板と並行なくの字形状の給電素子を備えることを特徴とする。   In order to achieve the above object, an antenna device according to the present invention includes a conductor ground plate having at least one substantially right-angled corner, a feed point installed at a corner of the conductor ground plate, and the feed point of the conductor ground plate. And a middle point of the element is connected to the other end of the feeder line, and both side elements of the middle point are provided with a letter-shaped feeder element in parallel with the conductor ground plane. To do.

また、本発明のアンテナ装置は、略直角の角部を少なくとも1つ有する導体地板と、前記導体地板の角部に設置された給電点と、前記導体地板の前記給電点に一端が接続され給電線と、素子の中点が前記給電線の他端に接続され、前記中点の両側素子が前記導体地板と並行なくの字形状の給電素子と、前記給電点から等距離の前記導体地板の両辺に接地され、先端が前記給電点と反対方向を向いた少なくとも2つの無給電逆L字状素子を備えることを特徴とする。   The antenna device according to the present invention includes a conductor ground plane having at least one corner at a substantially right angle, a feed point installed at the corner of the conductor ground plane, and one end connected to the feed point of the conductor ground plane. The middle point of the electric wire and the element is connected to the other end of the feeder line, and the both side elements of the middle point are parallel to the conductor ground plane, and the conductor ground plane is equidistant from the feeder point. It is characterized by comprising at least two parasitic L-shaped elements which are grounded on both sides and whose leading ends are opposite to the feeding point.

また、本発明のアンテナ装置を搭載したICは、角部を有するグランド面と、前記グランド面上に配置され、RF回路を含む無線通信用ICと、前記RF回路の前記グランド面の前記角部に対応する位置に設置された給電点と、前記RF回路の前記給電点に一端が接続された給電線と、前記グランド面の前記角部の外側にあって、素子の中点が前記給電線の他端に接続され、前記中点の両側素子が前記グランド面と並行なくの字形状の給電素子を備えることを特徴とする。   An IC equipped with the antenna device of the present invention includes a ground plane having corners, a wireless communication IC disposed on the ground plane and including an RF circuit, and the corners of the ground plane of the RF circuit. A feed point installed at a position corresponding to the feed point, a feed line having one end connected to the feed point of the RF circuit, and a midpoint of an element outside the corner of the ground plane. The both side elements at the midpoint are provided with a character-shaped feeding element not parallel to the ground plane.

また、本発明のアンテナ装置を搭載した携帯端末は、ディスプレイ側の筐体上部に設けられ少なくとも1つの角部を有する導体地板と、前記導体地板の角部に設置された給電点と、前記導体地板の前記給電点に一端が接続され給電線と、素子の中点が前記給電線の他端に接続され、前記中点の両側素子が前記導体地板と並行なくの字形状の給電素子と、前記給電点から等距離の前記導体地板の両側に接地され、先端が前記給電点と反対方向を向いた少なくとも2つの無給電逆L字状素子を備えることを特徴とする。   In addition, a mobile terminal equipped with the antenna device of the present invention includes a conductor ground plate provided at an upper portion of the display-side casing, having at least one corner, a feeding point installed at a corner of the conductor ground, and the conductor One end is connected to the feeding point of the ground plane, the feeding line, and the middle point of the element is connected to the other end of the feeding line, both side elements of the middle point is a letter-shaped feeding element in parallel with the conductor ground plane, It is characterized by comprising at least two parasitic L-shaped elements which are grounded on both sides of the conductor ground plate at an equal distance from the feeding point and whose tips are directed in a direction opposite to the feeding point.

本発明のアンテナ装置によれば、給電素子の低姿勢化を進めても、広帯域特性が損なわれず放射領域を広く確保することができる。   According to the antenna device of the present invention, it is possible to secure a wide radiation region without impairing the broadband characteristics even if the posture of the feed element is lowered.

以下、本発明の実施例を、図面を参照して説明する。   Embodiments of the present invention will be described below with reference to the drawings.

図1乃至図6を用いて本発明の第1の実施例に係るアンテナ装置について説明する。まず図1に、本実施例に係るアンテナ装置の構成を示す。   The antenna apparatus according to the first embodiment of the present invention will be described with reference to FIGS. First, FIG. 1 shows a configuration of an antenna device according to the present embodiment.

このアンテナ装置は、幅a、高さbの矩形導体地板1、この矩形導体地板1の角に設置された給電点2、一端がこの給電点2に接続された素子長cの給電線3、および給電線3の他端と接続されたくの字形状の給電素子4を有している。この給電素子4は、素子の中点で直角に折れ曲がり、矩形導体地板1の給電点2側の直交する2辺それぞれと平行になるように配置されている。なお、給電素子4の折れ曲がった中点の角部から先端までの長さはdであり、給電線3の他端はこの折れ曲がった中点の角部に接続されている。   This antenna device includes a rectangular conductor ground plane 1 having a width a and a height b, a feed point 2 installed at a corner of the rectangular conductor ground plane 1, a feed line 3 having an element length c, one end connected to the feed point 2, And a power supply element 4 having a dogleg shape connected to the other end of the power supply line 3. The feeding element 4 is bent at a right angle at the middle point of the element, and is arranged so as to be parallel to each of two orthogonal sides of the rectangular conductor ground plane 1 on the feeding point 2 side. In addition, the length from the corner of the bent middle point to the tip of the feeding element 4 is d, and the other end of the feeder 3 is connected to the corner of the bent middle point.

ここで、矩形導体地板1の幅a、高さb、給電線3の素子長c及び給電素子4の素子長dは、
a+b+c+d=λa/2 (1)
a+b=λb/2 (2)
a+b+c+d=λc (3)
となるよう設定する。ただしλaは、第1共振周波数faの波長、λbは、第2共振周波数fbの波長、λcは第3共振周波数fcの波長である。なお、これらの共振周波数fa,fb,fcは、近接してfa<fb<fcとなるよう選択する。
Here, the width a and height b of the rectangular conductor ground plane 1, the element length c of the feeder line 3, and the element length d of the feeder element 4 are:
a + b + c + d = λa / 2 (1)
a + b = λb / 2 (2)
a + b + c + d = λc (3)
Set to be Where λa is the wavelength of the first resonance frequency fa, λb is the wavelength of the second resonance frequency fb, and λc is the wavelength of the third resonance frequency fc. Note that these resonance frequencies fa, fb, and fc are selected to be close to each other so that fa <fb <fc.

次に、上述したアンテナ装置の応用例として、無線通信用IC7を搭載した基板にこのアンテナ装置を実装した例を示す。図2は、このアンテナ装置を実装した基板の構成を示す図である。   Next, as an application example of the antenna device described above, an example in which the antenna device is mounted on a substrate on which the wireless communication IC 7 is mounted will be described. FIG. 2 is a diagram illustrating a configuration of a substrate on which the antenna device is mounted.

図2に示す基板は、地板として動作するグランド面5、RF回路6を含む複数の回路を内蔵した無線通信用IC7、基板にプリントされた給電素子4、及びRF回路6内に設けられた給電点2と給電素子4とを接続するボンディングワイヤ10(図1の給電線3)を有している。   The substrate shown in FIG. 2 includes a ground plane 5 that operates as a ground plane, a wireless communication IC 7 that includes a plurality of circuits including an RF circuit 6, a power supply element 4 printed on the substrate, and a power supply provided in the RF circuit 6. A bonding wire 10 (feed line 3 in FIG. 1) for connecting the point 2 and the feed element 4 is provided.

この図2の基板構成と図1との関係は、角部を有するグランド面5は矩形導体地板1に対応する。グランド面5上に配置され、RF回路6を含む無線通信用IC7は、図1では省略した矩形導体地板1に実装される無線通信回路である。RF回路6のグランド面5の角部に対応する位置に設置された給電点2は、図1の給電点2と同じである。RF回路6の給電点2に一端が接続されたボンディングワイヤ10は、図1の給電線3に対応する。グランド面5の角部の外側にあって、くの字形状素子の中点がボンディングワイヤ10の他端に接続され、中点の両側素子がグランド面5と並行な給電素子4、図1の給電素子4に対応する。   In the relationship between the substrate configuration of FIG. 2 and FIG. 1, the ground plane 5 having corners corresponds to the rectangular conductor ground plane 1. The wireless communication IC 7 disposed on the ground plane 5 and including the RF circuit 6 is a wireless communication circuit mounted on the rectangular conductor ground plane 1 omitted in FIG. The feeding point 2 installed at a position corresponding to the corner of the ground surface 5 of the RF circuit 6 is the same as the feeding point 2 in FIG. A bonding wire 10 having one end connected to the feeding point 2 of the RF circuit 6 corresponds to the feeding line 3 in FIG. A midpoint of the U-shaped element outside the corner of the ground plane 5 is connected to the other end of the bonding wire 10, and both side elements at the midpoint are feed elements 4 parallel to the ground plane 5, as shown in FIG. This corresponds to the feeding element 4.

続いて図3乃至図6を用いて、図1に示すアンテナ装置の動作を説明する。なお、本発明に係るアンテナ装置の動作は、矩形導体地板1の給電点2と点Aを結ぶ対角線を挟んでほぼ対称となるため、ここでは対角線を挟んだ一方(図1では矩形導体地板1の左上側)の動作について説明する(矩形導体地板1の右下側も同じ動作)。図3は、このアンテナ装置の共振状態を示した図である。このアンテナ装置の左上側では、主に図1に示す点Aから点Bまでの破線で示す部分で共振状態となる。そこで図3では、説明を簡単にするため図1に示す点Aから点Bまでの破線で示す部分を一直線で示している。   Next, the operation of the antenna device shown in FIG. 1 will be described with reference to FIGS. The operation of the antenna device according to the present invention is substantially symmetric with respect to a diagonal line connecting the feeding point 2 and the point A of the rectangular conductor ground plane 1, so that the diagonal line is sandwiched here (in FIG. 1, the rectangular conductor ground plane 1 Will be described (the same operation is also performed on the lower right side of the rectangular conductor base plate 1). FIG. 3 is a diagram illustrating a resonance state of the antenna device. On the upper left side of this antenna device, a resonance state is mainly obtained at a portion indicated by a broken line from point A to point B shown in FIG. Therefore, in FIG. 3, for simplicity of explanation, a portion indicated by a broken line from point A to point B shown in FIG. 1 is shown by a straight line.

このアンテナ装置は、3つの周波数と共振する。
まず図3(a)に、第1共振周波数faと共振する第1の共振状態を示す。上述したように、第1共振周波数faの波長λaと、矩形導体地板1の大きさ(幅と高さ)、給電線3及び給電素子4の素子長との関係が、式(1)に示すa+b+c+d=λa/2となるため、このアンテナ装置は、第1共振周波数faと直列共振する。
This antenna device resonates with three frequencies.
First, FIG. 3A shows a first resonance state that resonates with the first resonance frequency fa. As described above, the relationship between the wavelength λa of the first resonance frequency fa, the size (width and height) of the rectangular conductor ground plane 1, and the element lengths of the feeder line 3 and the feeder element 4 is expressed by Expression (1). Since a + b + c + d = λa / 2, this antenna device resonates in series with the first resonance frequency fa.

次に図3(b)に、第2共振周波数fbと共振する第2の共振状態を示す。この場合、第2共振周波数fbの波長λbと、矩形導体地板1の大きさの関係が、式(2)に示すa+b=λb/2となるため、このアンテナ装置は、第2共振周波数fbと並列共振する。   Next, FIG. 3B shows a second resonance state that resonates with the second resonance frequency fb. In this case, since the relationship between the wavelength λb of the second resonance frequency fb and the size of the rectangular conductor ground plane 1 is a + b = λb / 2 shown in Expression (2), this antenna device has the second resonance frequency fb Resonates in parallel.

さらに図3(c)に、第3共振周波数fcと共振する第3の共振状態を示す。この場合、第2共振周波数fcの波長λcと、矩形導体地板1の大きさ、給電線3及び給電素子4の素子長との関係が、式(3)に示すa+b+c+d=λcとなるため、このアンテナ装置は、第3共振周波数fcと直列共振する。   Further, FIG. 3C shows a third resonance state that resonates with the third resonance frequency fc. In this case, since the relationship between the wavelength λc of the second resonance frequency fc, the size of the rectangular conductor ground plane 1, and the element lengths of the feeder line 3 and the feeder element 4 is a + b + c + d = λc shown in Expression (3), The antenna device resonates in series with the third resonance frequency fc.

以下、図4乃至図6を用いて、矩形導体地板1の大きさ、給電線3及び給電素子4の素子長の設定例を示す。この例では、この例では、a=b=25mm、c=1.4mm、d=20mmとした場合について説明する。   Hereinafter, setting examples of the size of the rectangular conductor ground plane 1 and the element lengths of the feeder line 3 and the feeder element 4 will be described with reference to FIGS. 4 to 6. In this example, a case where a = b = 25 mm, c = 1.4 mm, and d = 20 mm will be described.

図4は、この設定例における2.5GHz〜4.5GHzに渡るアンテナ装置の反射特性を示す図である。このアンテナ装置におけるVSWR(Voltage Standing Wave Ratio:電圧定在波比)が3以下となる周波数帯域は、2.65GHz〜4.09GHzである。すなわち、中心周波数3.37GHzとすると比帯域42.7%となる。さらにこのアンテナ装置の矩形導体地板1から給電素子4までの高さは、約0.016波長となる。   FIG. 4 is a diagram showing the reflection characteristics of the antenna device over 2.5 GHz to 4.5 GHz in this setting example. The frequency band in which the VSWR (Voltage Standing Wave Ratio) in this antenna device is 3 or less is 2.65 GHz to 4.09 GHz. That is, when the center frequency is 3.37 GHz, the specific band is 42.7%. Further, the height from the rectangular conductor ground plane 1 to the feed element 4 of this antenna device is about 0.016 wavelength.

次に図5は、図1に示すアンテナ装置の水平面(図1に示すxy平面)における垂直偏波の放射パターンを示す図である。図5(a)は、周波数2.65GHz、図5(b)は、周波数3.37GHz、図5(c)は周波数4.09GHzにおける垂直偏波の放射パターンをそれぞれ示している。   Next, FIG. 5 is a view showing a radiation pattern of vertically polarized waves on the horizontal plane (xy plane shown in FIG. 1) of the antenna apparatus shown in FIG. 5A shows a radiation pattern of vertically polarized waves at a frequency of 2.65 GHz, FIG. 5B shows a radiation pattern of a frequency of 3.37 GHz, and FIG. 5C shows a frequency of 4.09 GHz.

図5(a)に示すように周波数2.65GHzでは、ほぼ無指向性の放射パターンとなっている。また図5(c)に示すように周波数が4.09GHzに変化すると、x方向の放射パターンは、0dBiから1dBiへ1dB変化し、y方向の放射パターンは、−3dBiから−7dBiへ4dB変化している。   As shown in FIG. 5A, the radiation pattern is almost non-directional at a frequency of 2.65 GHz. As shown in FIG. 5C, when the frequency is changed to 4.09 GHz, the radiation pattern in the x direction is changed by 1 dB from 0 dBi to 1 dBi, and the radiation pattern in the y direction is changed by 4 dB from -3 dBi to -7 dBi. ing.

また図6は、図1に示すアンテナ装置の水平面(図1に示すxy平面)における水平偏波の放射パターンを示す図である。図6(a)は、周波数2.65GHz、図5(6)は、周波数3.37GHz、図6(c)は周波数4.09GHzにおける水平偏波の放射パターンをそれぞれ示している。いずれの周波数においても、x方向が0〜1dBiの8の字形放射パターンとなっている。また水平偏波の場合は、周波数が変化しても放射パターンはあまり変化しない。   6 is a diagram showing a radiation pattern of horizontally polarized waves on the horizontal plane (xy plane shown in FIG. 1) of the antenna device shown in FIG. 6A shows a radiation pattern of a horizontally polarized wave at a frequency of 2.65 GHz, FIG. 5C shows a radiation pattern of a horizontal polarization at a frequency of 3.37 GHz, and FIG. 6C shows a frequency of 4.09 GHz. At any frequency, an X-shaped radiation pattern of 0 to 1 dBi in the x direction is obtained. In the case of horizontal polarization, the radiation pattern does not change much even if the frequency changes.

以上のように第1の実施例によれば、アンテナ装置は、矩形導体地板1から主に電波を放射するため、給電線3の素子長cの長短は、放射領域に大きな影響を与えない。そのため、給電線3の素子長cを短くすることで給電素子4の低姿勢化を進めても放射領域を確保できる。また、各共振周波数fa,fb,fcを近接してfa<fb<fcとなるよう選択することで、アンテナ装置の共振状態が連続し、広い周波数帯域に渡って給電点2から見た給電素子4の入力インピーダンスのリアクタンス成分が小さくなる。従って、インピーダンス整合がとりやすくなりアンテナ装置を広帯域化することができる。この場合において、アンテナ装置の低姿勢化を進め給電線3の素子長cを短くしても、式(1)または式(3)を満たすように給電素子4の素子長dを調整することで広帯域特性を維持することができる。さらに、給電点2を矩形導体地板1と給電線3の接続点である角部に設置することで、矩形導体地板1の縁を流れる電流が互いに直交(矩形導体地板1の左上側と右下側)し打ち消しにくくなり、歪みのない放射パターンを得ることができる。   As described above, according to the first embodiment, since the antenna device mainly radiates radio waves from the rectangular conductor ground plane 1, the length of the element length c of the feeder line 3 does not significantly affect the radiation region. Therefore, the radiation region can be secured even if the posture of the feeder element 4 is lowered by shortening the element length c of the feeder line 3. Further, by selecting the resonance frequencies fa, fb, and fc close to each other so that fa <fb <fc, the resonance state of the antenna device is continuous, and the feed element viewed from the feed point 2 over a wide frequency band The reactance component of the input impedance of 4 is reduced. Therefore, impedance matching can be easily performed and the antenna device can be widened. In this case, even if the attitude of the antenna device is lowered and the element length c of the feed line 3 is shortened, the element length d of the feed element 4 is adjusted so as to satisfy the formula (1) or the formula (3). Broadband characteristics can be maintained. Furthermore, by installing the feeding point 2 at the corner that is the connection point between the rectangular conductor ground plane 1 and the feeder line 3, the currents flowing through the edges of the rectangular conductor ground plane 1 are orthogonal to each other (the upper left side and the lower right side of the rectangular conductor ground plane 1). Side) and it becomes difficult to cancel, and a radiation pattern without distortion can be obtained.

次に図7乃至図10を用いて、第2の実施例に係るアンテナ装置を説明する。まず図7は、第2の実施例に係るアンテナ装置の構成を示す図である。アンテナ装置は、図1のアンテナ装置に加え、給電点2を挟んで対称に無給電逆L字状素子11,12を取り付けた構成としている。これ以外の構成は、図1に示すアンテナ装置と同じであるため、同一符号を付して説明は省略する。   Next, the antenna device according to the second embodiment will be described with reference to FIGS. First, FIG. 7 is a diagram illustrating the configuration of the antenna device according to the second embodiment. In addition to the antenna device of FIG. 1, the antenna device has a configuration in which parasitic non-feed L-shaped elements 11 and 12 are attached symmetrically across the feeding point 2. Since the configuration other than this is the same as that of the antenna apparatus shown in FIG.

まず無給電逆L字状素子11,12は、給電点2で直交する矩形導体地板1の2辺上にそれぞれ接地されている。この無給電逆L字状素子11,12の接地点は、給電点2から距離gだけ離れている。またその素子形状は、この接地点から垂直に伸びた後、直角に折れ曲がり、矩形導体地板1の辺と平行に給電点2から離れる方向に伸びた形状をしている。   First, the parasitic L-shaped elements 11 and 12 are grounded on the two sides of the rectangular conductor ground plane 1 orthogonal to the feeding point 2. The grounding points of the parasitic L-shaped elements 11 and 12 are separated from the feeding point 2 by a distance g. The element shape extends perpendicularly from the grounding point, then bends at a right angle, and extends in a direction away from the feeding point 2 in parallel with the side of the rectangular conductor ground plane 1.

また、このアンテナ装置の矩形導体地板1の幅a及び高さbは、a+b=λb/2を満たす必要はなく、代わりに無給電逆L字状素子11,12の素子長及び接地位置を、
f+g+c+d=λa/2 (4)
f+g=λb/2 (5)
f+g+c+d=λc (6)
となるように設定する。
Further, the width a and height b of the rectangular conductor ground plane 1 of this antenna device do not need to satisfy a + b = λb / 2. Instead, the element length and grounding position of the parasitic reverse L-shaped elements 11 and 12 are
f + g + c + d = λa / 2 (4)
f + g = λb / 2 (5)
f + g + c + d = λc (6)
Set to be.

ただし、fは無給電逆L字状素子11,12の素子長、gは給電点2と無給電逆L字状素子11,12の接地点間の距離である。   Here, f is the element length of the parasitic L-shaped elements 11 and 12, and g is the distance between the feeding point 2 and the ground point of the parasitic L-shaped elements 11 and 12.

次に、図8を用いて上述したアンテナ装置を携帯端末へ搭載した応用例として、ノート型パソコンへ搭載した例を示す。図8は、アンテナ装置を2つ搭載したノート型パソコンの構成例を示している。ノート型パソコンは、ディスプレイを表示面として露出する上筐体13を、本体部を内蔵しキーボード部を操作面として露出する下筐体14に回動自在に接続した構成を有している。   Next, as an application example in which the antenna device described above is mounted on a portable terminal with reference to FIG. FIG. 8 shows a configuration example of a notebook personal computer equipped with two antenna devices. The notebook personal computer has a configuration in which an upper housing 13 exposed with a display as a display surface is rotatably connected to a lower housing 14 with a built-in main body and exposed with a keyboard portion as an operation surface.

このうち上筐体13には、アンテナ装置が送受信する信号を処理するダイバーシチRF回路(図示せず)を含む回路部16、下筐体14と接していない上側両サイドの角部にそれぞれ給電点17,18を有しているグランド面5、グランド面5上に設置される液晶パネル(図示せず)、各給電線20,21を介して給電点17,18それぞれと接続される給電素子22,23、給電点17を挟んで対称になるようグランド面5に接地される無給電逆L字状素子24,25及び給電点18を挟んで対称になるようグランド面5に接地される無給電逆L字状素子26,27を有している。なお、ダイバーシチRF回路16は、各信号線28,29を介して給電点17,18にそれぞれ接続されている。また、無給電逆L字状素子24乃至27の形状は、図7と同じであるのでその説明は省略する。   Among them, the upper housing 13 has a feeding point at each of the corners on both the upper side and the circuit portion 16 including a diversity RF circuit (not shown) for processing signals transmitted and received by the antenna device, and the lower housing 14. 17 and 18, a liquid crystal panel (not shown) installed on the ground surface 5, and a feed element 22 connected to the feed points 17 and 18 via the feed lines 20 and 21, respectively. , 23, parasitic L-shaped elements 24, 25 grounded to the ground surface 5 so as to be symmetrical with respect to the feeding point 17, and parasitic power grounded to the ground surface 5 so as to be symmetrical with respect to the feeding point 18 Inverted L-shaped elements 26 and 27 are provided. The diversity RF circuit 16 is connected to the feeding points 17 and 18 via the signal lines 28 and 29, respectively. Further, since the shapes of the parasitic L-shaped elements 24 to 27 are the same as those in FIG. 7, the description thereof is omitted.

続いて図9を用いて、本実施例に係るアンテナ装置の動作を説明する。まず図9は、このアンテナ装置の共振状態を示した図である。共振状態は、図3と同じく3つの状態を有するが、本実施例では図7の例えば点Bから点Cの間(図7の給電素子4の下側先端と無給電逆L字状素子12の先端間、及び図8では給電素子22,23と無給電逆L字状素子24乃至27の4つの間も同じ)で共振が起こる。これは、アンテナ装置に無給電逆L字状素子11,12(図8の24乃至27)を取り付けることで、給電点2(図8の17,18)から見た無給電逆L字状素子11,12(図8の24乃至27)のインピーダンスが小さく見え、各無給電逆L字状素子11,12(図8の24乃至27)の接地点から先の矩形導体地板1(図8の5)には電流が流れにくくなるためである。   Subsequently, the operation of the antenna device according to the present embodiment will be described with reference to FIG. First, FIG. 9 is a diagram showing a resonance state of the antenna device. The resonance state has three states as in FIG. 3, but in this embodiment, for example, between point B and point C in FIG. 7 (the lower end of the feeding element 4 in FIG. 7 and the parasitic L-shaped element 12 without feeding). The resonance occurs between the tips of the four elements, and between the feeding elements 22 and 23 and the four parasitic L-shaped elements 24 to 27 in FIG. This is because the parasitic inverted L-shaped elements 11 and 12 (24 to 27 in FIG. 8) are attached to the antenna device, so that the parasitic inverted L-shaped elements viewed from the feeding point 2 (17 and 18 in FIG. 8). 11 and 12 (24 to 27 in FIG. 8) appear to be small, and the rectangular conductor ground plane 1 (in FIG. 8) from the ground point of each of the parasitic inverted L-shaped elements 11 and 12 (24 to 27 in FIG. 8). This is because 5) makes it difficult for current to flow.

ここで例示した点Bから点Cの間では、以下3つの共振周波数で共振が起こる。
まず上述したように、第1共振周波数faの波長λaと、給電線3(図8の21)、給電素子4(図8の23)及び無給電逆L字状素子11(図8の27)の素子長との関係が、式(4)に示すf+g+c+d=λa/2となるため、このアンテナ装置は、給電点2(図8の18)から点Cまでの間で第1共振周波数faと直列共振する。
Resonance occurs at the following three resonance frequencies between point B and point C illustrated here.
First, as described above, the wavelength λa of the first resonance frequency fa, the feed line 3 (21 in FIG. 8), the feed element 4 (23 in FIG. 8), and the parasitic reverse L-shaped element 11 (27 in FIG. 8). Since the relationship with the element length is f + g + c + d = λa / 2 shown in Expression (4), this antenna device has a first resonance frequency fa between the feed point 2 (18 in FIG. 8) and the point C. Resonates in series.

次に、第2共振周波数fbの波長λbと、無給電逆L字状素子11(図8の27)の素子長との関係が、式(5)に示すf+g=λb/2となるため、このアンテナ装置は、給電点2(図8の18)から点Cまでの間で第2共振周波数fbと並列共振する。   Next, since the relationship between the wavelength λb of the second resonance frequency fb and the element length of the parasitic L-shaped element 11 (27 in FIG. 8) is f + g = λb / 2 shown in Equation (5), This antenna device resonates in parallel with the second resonance frequency fb between the feeding point 2 (18 in FIG. 8) and the point C.

さらに、第2共振周波数fcの波長λcと、給電線3(図8の21)、給電素子4(図8の23)及び無給電逆L字状素子11(図8の27)の素子長との関係が、式(6)に示すf+g+c+d=λcとなるため、このアンテナ装置は、給電点2(図8の18)から点Cまでの間で第3共振周波数fcと直列共振する。   Furthermore, the wavelength λc of the second resonance frequency fc, the element lengths of the feeder 3 (21 in FIG. 8), the feeder 4 (23 in FIG. 8), and the parasitic L-shaped element 11 (27 in FIG. 8) Therefore, the antenna device resonates in series with the third resonance frequency fc from the feeding point 2 (18 in FIG. 8) to the point C. As shown in Equation (6), f + g + c + d = λc.

以下、図10及び図11を用いて、例示した点Bから点Cの間におけるアンテナ装置の各素子長a乃至f及び給電点2(図8の18)から接地点までの距離gの設定例を示す。この例では、a=b=100mm、c=1.4mm、d=17mm、f=25mm、g=48mmとした場合について説明する。   Hereinafter, with reference to FIGS. 10 and 11, setting examples of the element lengths a to f of the antenna device and the distance g from the feeding point 2 (18 in FIG. 8) to the ground point between the illustrated points B and C are shown. Indicates. In this example, a case where a = b = 100 mm, c = 1.4 mm, d = 17 mm, f = 25 mm, and g = 48 mm will be described.

図10に、このときの周波数3.0GHzにおける水平面(図7に示すxy平面)放射パターンを示す。また、図10(a)は、垂直偏波の放射パターンであり、図10(b)は、水平偏波の放射パターンである。ここで比較のため、図11に、無給電逆L字状素子11(図8の27)を除いたアンテナ装置の放射パターンを示す。ただし、各素子長a乃至d及び距離gの値は、上記設定例と同じである。また、図11(a)は、垂直偏波の放射パターンであり、図11(b)は、水平偏波の放射パターンである。   FIG. 10 shows a horizontal plane (xy plane shown in FIG. 7) radiation pattern at a frequency of 3.0 GHz at this time. FIG. 10A shows a radiation pattern with vertical polarization, and FIG. 10B shows a radiation pattern with horizontal polarization. For comparison, FIG. 11 shows a radiation pattern of the antenna device excluding the parasitic inverted L-shaped element 11 (27 in FIG. 8). However, the values of the element lengths a to d and the distance g are the same as in the above setting example. Further, FIG. 11A shows a radiation pattern of vertical polarization, and FIG. 11B shows a radiation pattern of horizontal polarization.

図10と図11を比較すると、第2の実施例を適用した図10(a)に示す垂直偏波の放射パターンは、ほぼ無指向性で利得が大きいのに対して、適用しない図11(a)に示す放射パターンは、利得が非常に小さくパターンも歪んでいる。また、第2の実施例を適用した図10(b)に示す水平偏波の放射パターンは、8の字形状をしているのに対して、適用しない図11(b)に示す放射パターンは、ヌル点が4つあり図10(b)と比較してパターンが歪んでいる。   Comparing FIG. 10 and FIG. 11, the vertically polarized radiation pattern shown in FIG. 10A to which the second embodiment is applied is substantially non-directional and has a large gain, whereas FIG. The radiation pattern shown in a) has a very small gain and the pattern is also distorted. In addition, the horizontal polarization radiation pattern shown in FIG. 10B to which the second embodiment is applied has an 8-shaped shape, whereas the radiation pattern shown in FIG. There are four null points, and the pattern is distorted as compared with FIG.

以上のように第2の実施例によれば、第1の実施例と同様の効果が得られるとともに、無給電逆L字状素子11,12の接地点と給電点2の間を除いた矩形導体地板1に電流が流れにくくなるため、矩形導体地板1の幅a及び高さbによらず、歪みのない放射パターンを得ることができる。これは、矩形導体地板1全体に電流が流れる場合、a+bが第2共振周波数fbの波長λbより長いと、この矩形導体地板1の周囲に分布する電流が、位相の異なる複数の定在波的「腹」を持つためである。この「腹」によって放射パターンに複数のヌル点が生じ、アンテナ装置の送受信性能が低下することとなる。そこで、矩形導体地板1に無給電逆L字状素子11,12を付加することで、放射パターンに複数のヌル点を生じさせる電流が、矩形導体地板1上に流れることを阻止することができ、歪みのない放射パターンが得られる。   As described above, according to the second embodiment, the same effect as that of the first embodiment can be obtained, and a rectangle except for the point between the grounding point of the parasitic L-shaped elements 11 and 12 and the feeding point 2 can be obtained. Since it becomes difficult for current to flow through the conductor ground plane 1, a radiation pattern without distortion can be obtained regardless of the width a and height b of the rectangular conductor ground plane 1. This is because when a current flows through the entire rectangular conductor ground plane 1, if a + b is longer than the wavelength λb of the second resonance frequency fb, the current distributed around the rectangular conductor ground plane 1 becomes a plurality of standing wave-like phases. This is because it has an “belly”. This “antinode” causes a plurality of null points in the radiation pattern, which degrades the transmission / reception performance of the antenna device. Therefore, by adding the parasitic L-shaped elements 11 and 12 to the rectangular conductor ground plane 1, it is possible to prevent the current that causes a plurality of null points in the radiation pattern from flowing on the rectangular conductor ground plane 1. A radiation pattern without distortion is obtained.

また、図8のノート型パソコンへの応用例に示したように、1つの矩形導体地板5に2以上のアンテナ装置を搭載する場合、無給電逆L字状素子24乃至27の接地点と給電点17,18の間を除いた矩形導体地板5に電流が流れにくくなるため、各給電点17−18間を流れる電流が減少し、結果相互のアンテナ間結合を抑制することができ、ダイバーシチ効果を向上させることができる。   Further, as shown in the application example to the notebook type personal computer of FIG. 8, when two or more antenna devices are mounted on one rectangular conductor ground plane 5, the grounding point and the feeding point of the parasitic L-shaped elements 24 to 27 are fed. Since it becomes difficult for a current to flow through the rectangular conductor ground plane 5 except between the points 17 and 18, the current flowing between the feeding points 17-18 is reduced, and as a result, the mutual coupling between the antennas can be suppressed, and the diversity effect can be suppressed. Can be improved.

次に図12を用いて、第3の実施例に係るアンテナ装置について説明する。
図12に示すアンテナ装置は、図1に示すアンテナ装置の給電素子4の各先端部に可変リアクタンス31,32を接続して矩形導体地板1に接地する構成となっている。それ以外の構成は、図1に示すアンテナと同じであるため同一符号を付して説明は省略する。
Next, the antenna apparatus according to the third embodiment will be described with reference to FIG.
The antenna device shown in FIG. 12 has a configuration in which variable reactances 31 and 32 are connected to the respective tip portions of the feed element 4 of the antenna device shown in FIG. Since the other configuration is the same as that of the antenna shown in FIG.

このアンテナ装置の動作では、送受信信号の周波数に応じて可変リアクタンス31,32のリアクタンス値を調整することにより、給電点2から見た給電素子4の入力インピーダンスをさらに小さくすることができる。このアンテナ装置の共振状態は、図1に示すアンテナ装置と同じであるため説明は省略する。   In the operation of the antenna device, the input impedance of the feed element 4 viewed from the feed point 2 can be further reduced by adjusting the reactance values of the variable reactances 31 and 32 according to the frequency of the transmission / reception signal. The resonance state of this antenna device is the same as that of the antenna device shown in FIG.

以上のように第3の実施例によれば、第1の実施例と同様の効果が得られるとともに、給電素子4の各先端を可変リアクタンス31,32を介して矩形導体地板1に接地した構成であることから、この可変リアクタンス31,32のリアクタンス値を周波数に応じて調整することで、給電点2から見たアンテナのリアクタンス成分をさらに小さくすることができる。これにより、より広い周波数帯域で整合がとりやすくなりアンテナ装置を広帯域化することができる。   As described above, according to the third embodiment, the same effect as that of the first embodiment can be obtained, and each tip of the feed element 4 is grounded to the rectangular conductor ground plane 1 via the variable reactances 31 and 32. Therefore, by adjusting the reactance values of the variable reactances 31 and 32 according to the frequency, the reactance component of the antenna viewed from the feeding point 2 can be further reduced. As a result, matching can be easily performed in a wider frequency band, and the antenna device can be widened.

次に図13を用いて、第4の実施例に係るアンテナ装置について説明する。
図13に示すアンテナ装置は、図7に示すアンテナ装置の給電素子4の先端に可変リアクタンス33,34を接続して矩形導体地板1に接地し、さらに、無給電逆L字状素子11,12の各先端にも可変リアクタンス35,36を接続して矩形導体地板1に接地する構成となっている。それ以外の構成は、図7に示すアンテナ装置と同じであるため同一符号を付して説明は省略する。
Next, an antenna apparatus according to a fourth embodiment will be described with reference to FIG.
The antenna apparatus shown in FIG. 13 connects the variable reactances 33 and 34 to the tips of the feed elements 4 of the antenna apparatus shown in FIG. The variable reactances 35 and 36 are also connected to the respective tips of the two so as to be grounded to the rectangular conductor ground plane 1. Since the other configuration is the same as that of the antenna apparatus shown in FIG.

このアンテナ装置の動作では、送受信信号の周波数に応じて可変リアクタンス33乃至36のリアクタンス値を調整することにより、アンテナのリアクタンス成分をさらに小さくすることができる。このアンテナ装置の共振状態は、図7に示すアンテナ装置と同じであるため説明は省略する。   In the operation of the antenna apparatus, the reactance component of the antenna can be further reduced by adjusting the reactance values of the variable reactances 33 to 36 according to the frequency of the transmission / reception signal. Since the resonance state of this antenna device is the same as that of the antenna device shown in FIG.

以上のように第4の実施例によれば、第2の実施例と同様の効果が得られるとともに、給電素子4の各先端を可変リアクタンス33,34を介して矩形導体地板1に接地し、また無給電逆L字状素子11,12の各先端を可変リアクタンス35,36を介して矩形導体地板1に接地した構成であることから、この可変リアクタンス33乃至36のリアクタンス値を周波数に応じて調整することで、給電点2から見た給電素子4及び無給電逆L字状素子11,12の入力インピーダンスをさらに小さくすることができる。これにより、より広い周波数帯域で整合がとりやすくなりアンテナ装置を広帯域化することができる。   As described above, according to the fourth embodiment, the same effect as that of the second embodiment can be obtained, and each end of the feed element 4 is grounded to the rectangular conductor ground plane 1 via the variable reactances 33 and 34. In addition, since the leading ends of the parasitic L-shaped elements 11 and 12 are grounded to the rectangular conductor ground plate 1 via the variable reactances 35 and 36, the reactance values of the variable reactances 33 to 36 are set according to the frequency. By adjusting, the input impedance of the feed element 4 and the parasitic L-shaped elements 11 and 12 seen from the feed point 2 can be further reduced. As a result, matching can be easily performed in a wider frequency band, and the antenna device can be widened.

次に図14乃至図16を用いて、第5の実施例に係るアンテナ装置を説明する。
まず図14に、本実施例に係るアンテナ装置の構成を示す。図14に示すアンテナ装置は、軽量化を図るため矩形導体地板1に矩形の穴38を形成している点を除き、図1に示すアンテナ装置の構成及び動作が同じであるため、同一符号を付し説明は省略する。
Next, an antenna device according to a fifth embodiment will be described with reference to FIGS.
First, FIG. 14 shows the configuration of the antenna device according to the present embodiment. The antenna device shown in FIG. 14 has the same configuration and operation as the antenna device shown in FIG. 1 except that a rectangular hole 38 is formed in the rectangular conductor ground plate 1 for weight reduction. The description is omitted.

また図15に、図14のアンテナ装置の変形例を示す。図15に示すアンテナ装置は、軽量化と小型化を図るため矩形導体地板1に穴38を形成し、その内側の角部に給電点2を設けている。すなわち、このアンテナ装置は、矩形導体地板1の穴38の角部の内側に設けられた給電点2と、矩形導体地板1の穴38の直交する2辺それぞれと平行になるよう配置されたくの字形状の給電素子4と、この給電素子4と給電点2を接続する給電線3を有している。図15に示すアンテナ装置の動作は、図14に示すアンテナ装置と同じであるため説明は省略する。   FIG. 15 shows a modification of the antenna device of FIG. In the antenna device shown in FIG. 15, a hole 38 is formed in the rectangular conductor base plate 1 in order to reduce weight and size, and a feeding point 2 is provided at an inner corner. That is, this antenna device is arranged to be parallel to the feeding point 2 provided inside the corner of the hole 38 of the rectangular conductor ground plane 1 and each of the two orthogonal sides of the hole 38 of the rectangular conductor ground plane 1. A power supply element 4 having a letter shape and a power supply line 3 connecting the power supply element 4 and the power supply point 2 are provided. The operation of the antenna device shown in FIG. 15 is the same as that of the antenna device shown in FIG.

なお、上述した図14又は図15に示すアンテナ装置は、図1に示すアンテナ装置の矩形導体地板1に穴38をあけた場合の変形例について説明したが、図7、図12及び図13に示すアンテナ装置の矩形導体地板1にも同様に穴を設けてもよい。   The antenna device shown in FIG. 14 or FIG. 15 described above has been described with respect to a modified example in which the hole 38 is formed in the rectangular conductor ground plane 1 of the antenna device shown in FIG. You may provide a hole similarly in the rectangular conductor ground plane 1 of the antenna apparatus shown.

次に、このアンテナ装置を自動車のフロントガラス43上に設置した応用例を示す。図16は、このアンテナ装置を搭載した自動車の構成の一部を示している。なお、本実施例のアンテナ装置に係る構成要素以外については説明を省略する。図16に示す自動車は、地板として動作する車体41、車体41内に設置され送受信信号の処理を行うRF回路6、図15の地板1の穴38に相当するフロントガラス43、このフロントガラス43の角に設置された給電点2、このRF回路6を接続する信号線45、フロントガラス43上に設置されたくの字形状の給電素子4、給電点2を挟んで対称になるよう車体41に接地される無給電逆L字状素子11,12、及びこの給電素子4の角部と給電点2とを接続する給電線3を有している。   Next, an application example in which this antenna device is installed on a windshield 43 of an automobile will be described. FIG. 16 shows a part of the configuration of an automobile equipped with this antenna device. Note that a description of components other than those related to the antenna device of this embodiment is omitted. The automobile shown in FIG. 16 includes a vehicle body 41 that operates as a ground plane, an RF circuit 6 that is installed in the vehicle body 41 and processes transmission / reception signals, a windshield 43 that corresponds to the hole 38 of the ground plane 1 in FIG. The feed point 2 installed at the corner, the signal line 45 connecting the RF circuit 6, the dog-shaped feed element 4 installed on the windshield 43, and grounded to the vehicle body 41 so as to be symmetrical across the feed point 2 And the feed line 3 that connects the corner of the feed element 4 and the feed point 2.

図16に示すアンテナ装置の動作は、図7に示すアンテナ装置と同じであるため説明は省略する。   The operation of the antenna device shown in FIG. 16 is the same as that of the antenna device shown in FIG.

以上のように第5の実施例によれば、第1の実施例と同様の効果が得られるとともに、矩形導体地板1に穴38(図16のフロントガラス43)をあけることで、アンテナ装置を軽量化することができる。また、矩形導体地板1にあけた穴38の内部に給電素子4を配置することで、アンテナ装置を小型化することができる。   As described above, according to the fifth embodiment, the same effect as that of the first embodiment can be obtained, and the antenna device can be obtained by opening the hole 38 (the windshield 43 in FIG. 16) in the rectangular conductor ground plane 1. The weight can be reduced. Moreover, the antenna device can be reduced in size by arranging the feeding element 4 inside the hole 38 formed in the rectangular conductor ground plane 1.

なお第1の実施例乃至第5の実施例に係るアンテナ装置では、地板として矩形導体地板1を用いたが、給電点2を設置する角部が略直角である地板であれば矩形でなくてもよい。また第5の実施例に係るアンテナ装置では、矩形導体地板1に矩形の穴をあけたが、これも給電点2を設置する角部が略直角であればよく、穴の形状が矩形でなくてもよい。   In the antenna devices according to the first to fifth embodiments, the rectangular conductor ground plane 1 is used as the ground plane. However, the ground plane is not rectangular if the corner where the feeding point 2 is installed is a substantially right angle. Also good. In the antenna device according to the fifth embodiment, a rectangular hole is formed in the rectangular conductor ground plane 1. However, it is sufficient that the corner portion where the feeding point 2 is installed has a substantially right angle, and the shape of the hole is not rectangular. May be.

なお、本発明は上記実施例そのままに限定されるものではなく、実施段階ではその要旨を逸脱しない範囲で構成要素を変形して具体化できる。また、上記実施例に開示されている複数の構成要素の適宜な組み合わせにより、種々の発明を形成できる。例えば、実施例に示される全構成要素から幾つかの構成要素を削除してもよい。さらに、異なる実施例にわたる構成要素を適宜組み合わせてもよい。     In addition, this invention is not limited to the said Example as it is, A component can be deform | transformed and embodied in the range which does not deviate from the summary in an implementation stage. Various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the above embodiments. For example, some components may be deleted from all the components shown in the embodiments. Furthermore, constituent elements over different embodiments may be appropriately combined.

本発明の第1の実施例に係るアンテナ装置の構成図。The block diagram of the antenna apparatus which concerns on 1st Example of this invention. 本発明の第1の実施例に係るアンテナ装置を実装したICの構成を示す図。The figure which shows the structure of IC which mounted the antenna apparatus which concerns on 1st Example of this invention. 本発明の第1の実施例に係るアンテナ装置の共振状態を示す図。The figure which shows the resonance state of the antenna apparatus which concerns on 1st Example of this invention. 本発明の第1の実施例に係るアンテナ装置の反射特性を示す図。The figure which shows the reflective characteristic of the antenna apparatus which concerns on 1st Example of this invention. 本発明の第1の実施例に係るアンテナ装置の水平面における垂直偏波の放射パターンを示す図。The figure which shows the radiation pattern of the vertically polarized wave in the horizontal surface of the antenna apparatus which concerns on 1st Example of this invention. 本発明の第1の実施例に係るアンテナ装置の水平面における水平偏波の放射パターンを示す図。The figure which shows the radiation pattern of the horizontal polarization in the horizontal surface of the antenna apparatus which concerns on 1st Example of this invention. 本発明の第2の実施例に係るアンテナ装置の構成図。The block diagram of the antenna apparatus which concerns on the 2nd Example of this invention. 本発明の第2の実施例に係るアンテナ装置をノート式パソコンに搭載した応用例を示す図。The figure which shows the application example which mounted the antenna apparatus which concerns on the 2nd Example of this invention in the notebook type personal computer. 本発明の第2の実施例に係るアンテナ装置の共振状態を示す図。The figure which shows the resonance state of the antenna apparatus which concerns on 2nd Example of this invention. 本発明の第2の実施例に係るアンテナ装置の水平面における垂直偏波及び水平偏波の放射パターンを示す図。The figure which shows the radiation pattern of the vertical polarization and horizontal polarization in the horizontal surface of the antenna apparatus which concerns on 2nd Example of this invention. 本発明の第2の実施例を適用しないアンテナ装置の水平面における垂直偏波及び水平偏波の放射パターンを示す図。The figure which shows the radiation pattern of the vertical polarization in the horizontal surface of the antenna apparatus which does not apply the 2nd Example of this invention, and a horizontal polarization. 本発明の第3の実施例に係るアンテナ装置の構成図。The block diagram of the antenna apparatus which concerns on the 3rd Example of this invention. 本発明の第4の実施例に係るアンテナ装置の構成図。The block diagram of the antenna apparatus which concerns on the 4th Example of this invention. 本発明の第5の実施例に係るアンテナ装置の構成図。The block diagram of the antenna apparatus which concerns on the 5th Example of this invention. 本発明の第2の実施例に係るアンテナ装置の変形例を示す図。The figure which shows the modification of the antenna apparatus which concerns on 2nd Example of this invention. 本発明の第2の実施例に係るアンテナ装置を自動車に適用した応用例を示す図。The figure which shows the application example which applied the antenna apparatus which concerns on the 2nd Example of this invention to the motor vehicle.

符号の説明Explanation of symbols

1・・・矩形導体地板
2,17,18・・・給電点
3,20,21・・・給電線
4,22,23・・・給電素子
5・・・グランド面
6,15・・・RF回路
7・・・無線通信用IC
10・・・ボンディングワイヤ
11,12,24,25,26,27無給電逆L字状素子
13,14・・・筐体
16・・・回路部
28,29,45・・・信号線
31,32,33,34,35,36・・・可変リアクタンス
38・・・穴
41・・・車体
43・・・フロントガラス
DESCRIPTION OF SYMBOLS 1 ... Rectangular conductor base plate 2, 17, 18 ... Feed point 3, 20, 21 ... Feed line 4, 22, 23 ... Feed element 5 ... Ground plane 6, 15 ... RF Circuit 7 ... IC for wireless communication
10... Bonding wires 11, 12, 24, 25, 26, 27 Parasitic reverse L-shaped elements 13, 14, casing 16, circuit portions 28, 29, 45, signal lines 31, 32, 33, 34, 35, 36 ... variable reactance 38 ... hole 41 ... car body 43 ... windshield

Claims (10)

略直角の角部を少なくとも1つ有する導体地板と、
前記導体地板の角部に設置された給電点と、
前記導体地板の前記給電点に一端が接続された給電線と、
素子の中点が前記給電線の他端に接続され、前記中点の両側素子が前記導体地板と並行なくの字形状の給電素子と
を備えることを特徴とするアンテナ装置。
A conductor ground plane having at least one corner at a substantially right angle;
A feeding point installed at a corner of the conductor ground plane;
A feed line having one end connected to the feed point of the conductor ground plane;
An antenna device comprising: a midpoint of an element connected to the other end of the feed line; and both side elements of the midpoint comprising a feed element having a letter shape in parallel with the conductor ground plane.
前記導体地板の幅をa、前記導体地板の高さをb、前記給電線の素子長をc、前記くの字形状の給電素子の素子長を2d、第1共振周波数faの波長をλa、第2共振周波数fbの波長をλb、第3共振周波数fcの波長をλcと設定すると、
a+b+c+d=λa/2であるとき前記第1共振周波数faと直列共振し、
a+b=λb/2であるとき前記第2共振周波数fbと並列共振し、
a+b+c+d=λcであるとき前記第3共振周波数fcと直列共振する
ことを特徴とする請求項1に記載のアンテナ装置。
The width of the conductor ground plane is a, the height of the conductor ground plane is b, the element length of the feeder line is c, the element length of the dog-shaped feeder element is 2d, the wavelength of the first resonance frequency fa is λa, When the wavelength of the second resonance frequency fb is set as λb and the wavelength of the third resonance frequency fc is set as λc,
When a + b + c + d = λa / 2, series resonance with the first resonance frequency fa
When a + b = λb / 2, the second resonance frequency fb is resonated in parallel,
2. The antenna device according to claim 1, wherein the antenna device performs series resonance with the third resonance frequency fc when a + b + c + d = λc.
略直角の角部を少なくとも1つ有する導体地板と、
前記導体地板の角部に設置された給電点と、
前記導体地板の前記給電点に一端が接続され給電線と、
素子の中点が前記給電線の他端に接続され、前記中点の両側素子が前記導体地板と並行なくの字形状の給電素子と、
前記給電点から等距離の前記導体地板の両辺に接地され、先端が前記給電点と反対方向を向いた少なくとも2つの無給電逆L字状素子と
を備えることを特徴とするアンテナ装置。
A conductor ground plane having at least one corner at a substantially right angle;
A feeding point installed at a corner of the conductor ground plane;
One end is connected to the feed point of the conductor ground plane, and a feed line,
A middle point of the element is connected to the other end of the feeder line, and both side elements of the middle point are shaped like a feeding element in parallel with the conductor ground plane,
An antenna device comprising: at least two passively inverted L-shaped elements that are grounded on both sides of the conductor ground plane that are equidistant from the feeding point and whose front ends are directed in a direction opposite to the feeding point.
前記無給電逆L字状素子の素子長をf、前記給電点と前記無給電逆L字状素子の接地点間の距離をg、前記給電線の素子長をc、前記くの字形状の給電素子の素子長を2d、第1共振周波数faの波長をλa、第2共振周波数fbの波長をλb、第3共振周波数fcの波長をλcと設定すると、
f+g+c+d=λa/2であるとき前記第1共振周波数faと直列共振し、
f+g=λb/2であるとき、前記第2共振周波数fbと並列共振し、
f+g+c+d=λcであるとき、前記第3共振周波数fcと直列共振する
ことを特徴とする請求項3に記載のアンテナ装置。
The element length of the parasitic L-shaped element is f, the distance between the feeding point and the ground point of the parasitic L-shaped element is g, the element length of the feeding line is c, When the element length of the feeding element is 2d, the wavelength of the first resonance frequency fa is λa, the wavelength of the second resonance frequency fb is λb, and the wavelength of the third resonance frequency fc is λc,
When f + g + c + d = λa / 2, the first resonance frequency fa is in series resonance,
When f + g = λb / 2, parallel resonance with the second resonance frequency fb
4. The antenna device according to claim 3, wherein the antenna device performs series resonance with the third resonance frequency fc when f + g + c + d = λc. 5.
前記くの字形状の給電素子の両端がそれぞれ可変リアクタンスを介して前記導体地板に接地されていることを特徴とする請求項1乃至請求項4のいずれか1項に記載のアンテナ装置。   5. The antenna device according to claim 1, wherein both ends of the dog-shaped feeding element are grounded to the conductor ground plane via variable reactances. 6. 前記くの字形状の給電素子及び前記無給電逆L字状素子の各両端がそれぞれ可変リアクタンスを介して前記導体地板に接地されていることを特徴とする請求項3に記載のアンテナ装置。   4. The antenna device according to claim 3, wherein both ends of the dog-shaped feeding element and the parasitic non-feeding inverted L-shaped element are grounded to the conductor ground plane via variable reactances. 前記導体地板に穴が形成されていることを特徴とする請求項1乃至請求項6のいずれか1項に記載のアンテナ装置。   The antenna device according to any one of claims 1 to 6, wherein a hole is formed in the conductor ground plane. 前記導体地板の前記穴の内側に、前記給電点と、この給電点と接続される前記くの字形状の給電素子とが設けられていることを特徴とする請求項7に記載のアンテナ装置。   The antenna device according to claim 7, wherein the feeding point and the dog-shaped feeding element connected to the feeding point are provided inside the hole of the ground conductor plate. 角部を有するグランド面と、
前記グランド面上に配置され、RF回路を含む無線通信用ICと、
前記RF回路の前記グランド面の前記角部に対応する位置に設置された給電点と、
前記RF回路の前記給電点に一端が接続された給電線と、
前記グランド面の前記角部の外側にあって、素子の中点が前記給電線の他端に接続され、前記中点の両側素子が前記グランド面と並行なくの字形状の給電素子と
を備えることを特徴とするアンテナ装置を搭載したIC。
A ground plane having corners;
A wireless communication IC disposed on the ground plane and including an RF circuit;
A feeding point installed at a position corresponding to the corner of the ground plane of the RF circuit;
A feed line having one end connected to the feed point of the RF circuit;
Outside the corner of the ground plane, a midpoint of the element is connected to the other end of the feed line, and both side elements of the midpoint include a feed element having a letter shape not parallel to the ground plane. IC equipped with an antenna device characterized by this.
ディスプレイ側の筐体上部に設けられ少なくとも1つの角部を有する導体地板と、
前記導体地板の角部に設置された給電点と、
前記導体地板の前記給電点に一端が接続され給電線と、
素子の中点が前記給電線の他端に接続され、前記中点の両側素子が前記導体地板と並行なくの字形状の給電素子と、
前記給電点から等距離の前記導体地板の両側に接地され、先端が前記給電点と反対方向を向いた少なくとも2つの無給電逆L字状素子と
を備えることを特徴とするアンテナ装置を搭載した携帯端末。
A conductive ground plane provided at the top of the display-side casing and having at least one corner;
A feeding point installed at a corner of the conductor ground plane;
One end is connected to the feed point of the conductor ground plane, and a feed line,
A middle point of the element is connected to the other end of the feeder line, and both side elements of the middle point are shaped like a feeding element in parallel with the conductor ground plane,
Mounted with an antenna device comprising: at least two parasitic L-shaped elements that are grounded on both sides of the conductor ground plate at an equal distance from the feeding point and whose tip faces in a direction opposite to the feeding point Mobile device.
JP2006038194A 2006-02-15 2006-02-15 Antenna system, ic loaded with same and portable terminal loaded with antenna system Pending JP2007221344A (en)

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JP2010041071A (en) * 2008-07-31 2010-02-18 Toshiba Corp Antenna device
US20110238398A1 (en) * 2010-03-26 2011-09-29 Hitachi Cable Fine-Tech, Ltd. Electromagnetic coupler, wireless terminal including same, and method for designing electromagnetic couplers
JP2012039582A (en) * 2010-08-12 2012-02-23 Casio Comput Co Ltd Multi-band antenna and electronic apparatus
WO2014203977A1 (en) * 2013-06-21 2014-12-24 旭硝子株式会社 Antenna, antenna device, and wireless device
GB2529885A (en) * 2014-09-05 2016-03-09 Smart Antenna Technologies Ltd Reconfigurable casing antenna system
CN105552534A (en) * 2016-02-03 2016-05-04 讯雷远大科技(深圳)有限公司 V-shaped antenna structure
JP2016149720A (en) * 2015-02-13 2016-08-18 株式会社国際電気通信基礎技術研究所 Antenna device and radio communication device
US10205232B2 (en) 2014-05-30 2019-02-12 AGC Inc. Multi-antenna and radio apparatus including thereof
CN109860980A (en) * 2019-03-01 2019-06-07 深圳市信维通信股份有限公司 Double frequency mimo antenna system and mobile terminal applied to 5G communication
US10535921B2 (en) 2014-09-05 2020-01-14 Smart Antenna Technologies Ltd. Reconfigurable multi-band antenna with four to ten ports
US10581166B2 (en) 2014-09-05 2020-03-03 Smart Antenna Technologies Ltd. Reconfigurable multi-band antenna with independent control
CN113196877A (en) * 2019-03-25 2021-07-30 株式会社钟化 Organic EL panel
CN114552197A (en) * 2022-04-01 2022-05-27 维沃移动通信有限公司 Antenna structure and electronic device

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JP2010041071A (en) * 2008-07-31 2010-02-18 Toshiba Corp Antenna device
US20110238398A1 (en) * 2010-03-26 2011-09-29 Hitachi Cable Fine-Tech, Ltd. Electromagnetic coupler, wireless terminal including same, and method for designing electromagnetic couplers
JP2011223569A (en) * 2010-03-26 2011-11-04 Hitachi Cable Fine Tech Ltd Electromagnetic coupler, radio terminal with the same mounted therein, and method of designing electromagnetic coupler
US8700375B2 (en) * 2010-03-26 2014-04-15 Hitachi Metals, Ltd. Electromagnetic coupler, wireless terminal including same, and method for designing electromagnetic couplers
JP2012039582A (en) * 2010-08-12 2012-02-23 Casio Comput Co Ltd Multi-band antenna and electronic apparatus
JPWO2014203977A1 (en) * 2013-06-21 2017-02-23 旭硝子株式会社 ANTENNA, ANTENNA DEVICE, AND RADIO DEVICE
WO2014203977A1 (en) * 2013-06-21 2014-12-24 旭硝子株式会社 Antenna, antenna device, and wireless device
CN105359337A (en) * 2013-06-21 2016-02-24 旭硝子株式会社 Antenna, antenna device, and wireless device
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US10205232B2 (en) 2014-05-30 2019-02-12 AGC Inc. Multi-antenna and radio apparatus including thereof
GB2529885B (en) * 2014-09-05 2017-10-04 Smart Antenna Tech Ltd Multiple antenna system arranged in the periphery of a device casing
GB2529885A (en) * 2014-09-05 2016-03-09 Smart Antenna Technologies Ltd Reconfigurable casing antenna system
US10535921B2 (en) 2014-09-05 2020-01-14 Smart Antenna Technologies Ltd. Reconfigurable multi-band antenna with four to ten ports
US10581166B2 (en) 2014-09-05 2020-03-03 Smart Antenna Technologies Ltd. Reconfigurable multi-band antenna with independent control
JP2016149720A (en) * 2015-02-13 2016-08-18 株式会社国際電気通信基礎技術研究所 Antenna device and radio communication device
CN105552534A (en) * 2016-02-03 2016-05-04 讯雷远大科技(深圳)有限公司 V-shaped antenna structure
CN109860980A (en) * 2019-03-01 2019-06-07 深圳市信维通信股份有限公司 Double frequency mimo antenna system and mobile terminal applied to 5G communication
CN109860980B (en) * 2019-03-01 2024-04-16 深圳市信维通信股份有限公司 Mobile terminal
CN113196877A (en) * 2019-03-25 2021-07-30 株式会社钟化 Organic EL panel
CN113196877B (en) * 2019-03-25 2024-05-14 株式会社钟化 Organic EL panel
CN114552197A (en) * 2022-04-01 2022-05-27 维沃移动通信有限公司 Antenna structure and electronic device

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