JP2945127B2 - wireless device - Google Patents
wireless deviceInfo
- Publication number
- JP2945127B2 JP2945127B2 JP2308131A JP30813190A JP2945127B2 JP 2945127 B2 JP2945127 B2 JP 2945127B2 JP 2308131 A JP2308131 A JP 2308131A JP 30813190 A JP30813190 A JP 30813190A JP 2945127 B2 JP2945127 B2 JP 2945127B2
- Authority
- JP
- Japan
- Prior art keywords
- conductor
- housing
- antenna
- wireless device
- ground
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Description
【発明の詳細な説明】 ［産業上の利用分野］ この発明は、無線機に係わり、特にアンテナを備えた
無線機の筐体に流れる電流を抑圧した無線機に関する。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless device, and more particularly to a wireless device that suppresses a current flowing through a housing of a wireless device having an antenna.
［従来の技術］ 第13図は、例えば公開特許公報昭61−205004に示され
ているような、従来の無線機を示す斜視図であり、携帯
無線機を示している。図において、（１）は無線機の筐
体、（２）はアンテナ素子である４分の１波長のホイッ
プアンテナ、（３）はホイップアンテナ（２）への給電
点、（４）はホイップアンテナ（２）上の電流分布であ
る。なお、４分の１波長のホイップアンテナ（２）の電
流分布（４）は給電点（３）において腹部となり、ホイ
ップアンテナ（２）の先端において節部となるものであ
る。[Prior Art] FIG. 13 is a perspective view showing a conventional wireless device as shown in, for example, Japanese Patent Application Laid-Open No. 61-205004, and shows a portable wireless device. In the figure, (1) is a housing of a wireless device, (2) is a quarter-wave whip antenna serving as an antenna element, (3) is a feeding point to the whip antenna (2), and (4) is a whip antenna. (2) The current distribution above. The current distribution (4) of the quarter-wave whip antenna (2) becomes an abdomen at the feeding point (3) and a node at the tip of the whip antenna (2).
次に動作について説明する。 Next, the operation will be described.
上記のような無線機は筐体（１）を接地導体として動
作しており、筐体（１）を接地導体として給電点（３）
でホイップアンテナ（２）を給電するとホイップアンテ
ナ（２）の上に電流分布（４）の電流が流れ、空間へ電
波が放射される。なお、この時、筐体（１）上にもアン
テナ電流が流れる。The above-described wireless device operates using the housing (1) as a ground conductor, and the power supply point (3) using the housing (1) as a ground conductor.
When power is supplied to the whip antenna (2), a current having a current distribution (4) flows on the whip antenna (2), and a radio wave is radiated into space. At this time, the antenna current also flows on the housing (1).
［発明が解決しようとする課題］ 上記のような従来の無線機では、筐体（１）外側にホ
イップアンテナ（２）からの誘起電流や給電線の地導体
からのアンテナ電流が流れ、筐体（１）を手に持って操
作する場合に筐体（１）上に流れている電流が人体に漏
れることによってアンテナ特性が大きく劣化するという
問題点があった。[Problems to be Solved by the Invention] In the conventional wireless device as described above, the induced current from the whip antenna (2) and the antenna current from the ground conductor of the feeder flow outside the housing (1), When (1) is held and operated, there is a problem that the current flowing on the housing (1) leaks to the human body, thereby greatly deteriorating the antenna characteristics.
この発明は上記のような問題点を解決するためになさ
れたものであり、筐体に触れたときのアンテナ電流の漏
洩による特性劣化を防止し、通話状態において良好な感
度を有する無線機を得ることを目的とする。SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and it is possible to prevent a characteristic deterioration due to a leakage of an antenna current when touching a housing, and to obtain a wireless device having good sensitivity in a call state. The purpose is to:
［課題を解決するための手段］ この発明に係る無線機は、筐体と、上記筐体に取り付
けられたアンテナと、上記アンテナへの給電線とを備え
た無線機において、上記アンテナへの上記給電線の接続
部近傍の上記給電線の地導体に一端が接続され、上記ア
ンテナの地線を形成する第一の導体と、上記第一の導体
と上記筐体との間に設けられ、上記第一の導体と上記給
電線の地導体との接続位置近傍の筐体から見たときに高
インピーダンスとなる位置でその一端が筐体に接続さ
れ、上記給電線の地導体から上記筐体の外面へ流れる電
流を抑圧する第二の導体とを備えたものである。[Means for Solving the Problems] A wireless device according to the present invention is a wireless device including a housing, an antenna attached to the housing, and a power supply line to the antenna. One end is connected to a ground conductor of the feed line near a connection portion of the feed line, and a first conductor forming a ground wire of the antenna is provided between the first conductor and the housing; One end is connected to the housing at a position where the impedance becomes high when viewed from the housing near the connection position between the first conductor and the grounding conductor of the power supply line, and the housing is connected to the grounding conductor of the power supply line from the grounding conductor. A second conductor for suppressing a current flowing to the outer surface.
［作用］ 上記のように構成された無線機では、第二の導体は上
記第一の導体と給電線の地導体との接続位置近傍の筐体
から見たときに高インピーダンスとなる位置でその一端
が筐体に接続されており、いわゆるチョーク構造を成し
ているため、第一の導体が筐体の影響を受ける位置に設
けられた場合に給電線の地導体から筐体の外面へ流れる
電流を抑圧する。従って、第一の導体は完全なるアンテ
ナの地線を形成し、アンテナの放射導体と共振するの
で、アンテナからの誘起電流が筐体の外面へ流れるのを
抑止する。[Operation] In the radio device configured as described above, the second conductor is located at a position where the impedance becomes high when viewed from the housing near the connection position between the first conductor and the ground conductor of the feeder line. One end is connected to the housing, forming a so-called choke structure, so that when the first conductor is provided at a position affected by the housing, it flows from the ground conductor of the feeder line to the outer surface of the housing Suppress current. Therefore, the first conductor forms a complete antenna ground line and resonates with the antenna's radiating conductor, thereby suppressing the induced current from the antenna from flowing to the outer surface of the housing.
［実施例］ 第１図はこの発明の無線機の一実施例の構成を一部切
り欠いて示す斜視図、第２図は第１図の主要部のＡ−Ａ
における断面図であり、アンテナとして従来例同様の４
分の１波長のホイップアンテナが筐体に取り付けられた
例を示している。図において、（１）〜（４）は第13図
に示した従来例と同一または相当部分であり、（５）は
ホイップアンテナ（２）の地線を形成する第一の導体、
（６）は給電線であって、この実施例では同軸線路、
（７）は第一の導体（５）に接続された同軸線路（６）
の外導体、（８）は同軸線路（６）の内導体、（９）は
第一の導体（５）と筐体（１）との間に設けられ、上記
第一の導体（５）と上記同軸線路（６）の外導体（７）
との接続位置近傍の筐体（１）から見たときに高インピ
ーダンスとなる位置である概略４分の１波長の位置でそ
の一端が筐体（１）に接続された第二の導体である。な
お、ここで筐体（１）と外導体（７）とは図示のごとく
接続されている。また、ここで第一の導体（５）は例え
ば概略４分の１波長の長さの、一直線上に配置された２
本の導体棒であり、筐体（１）の上面の近くに設けられ
ている。[Embodiment] FIG. 1 is a perspective view showing a configuration of an embodiment of a wireless device of the present invention, with a part cut away, and FIG.
FIG. 4 is a cross-sectional view taken along line 4 of FIG.
An example is shown in which a whip antenna of one-half wavelength is attached to a housing. In the figure, (1) to (4) are the same as or equivalent to the conventional example shown in FIG. 13, (5) is a first conductor forming the ground wire of the whip antenna (2),
(6) is a feed line, and in this embodiment, a coaxial line,
(7) is a coaxial line (6) connected to the first conductor (5)
(8) is an inner conductor of the coaxial line (6), (9) is provided between the first conductor (5) and the housing (1), and is connected to the first conductor (5). Outer conductor (7) of the coaxial line (6)
Is a second conductor whose one end is connected to the housing (1) at a position of approximately a quarter wavelength, which is a position where the impedance becomes high when viewed from the housing (1) near the connection position with the housing (1). . Here, the housing (1) and the outer conductor (7) are connected as shown. Here, the first conductor (5) has a length of, for example, approximately a quarter wavelength and is arranged on a straight line.
The conductor rods are provided near the upper surface of the housing (1).
次の動作について説明する。 The following operation will be described.
上記のように構成された無線機では、給電点（３）で
ホイップアンテナ（２）を給電すると第一の導体（５）
を地導体として共振し、ホイップアンテナ（２）の上に
電流分布（４）の電流が流れ、空間へ電波が放射され
る。このとき、第一の導体（５）は筐体（１）の上面の
近くに設けられているので、図中に矢印（10）で経路を
示すように、表皮結果により同軸線路（６）の外導体
（７）の内側から外側へアンテナ電流が流れ、筐体
（１）の外側へ流れようとする。しかしながら、第一の
導体（５）と同軸線路（６）の外導体（７）との接続位
置近傍の筐体（１）から見たときに高インピーダンスと
なる位置である概略４分の１波長の位置でその一端が筐
体（１）に接続された第二の導体（９）が第一の導体
（５）と筐体（１）との間に設けられ、いわゆるチョー
ク構造を成しているため、筐体（１）の外面へ流れよう
とする上記アンテナ電流を抑圧する。従って、第一の導
体（５）は地線として機能し、ホイップアンテナ（２）
からの誘起電流は第一の導体（５）に生じ、筐体（１）
の外面へは影響を与えない。In the wireless device configured as described above, when the whip antenna (2) is fed at the feeding point (3), the first conductor (5)
Resonates as a ground conductor, a current of the current distribution (4) flows on the whip antenna (2), and a radio wave is radiated into space. At this time, since the first conductor (5) is provided near the upper surface of the housing (1), as shown by a route by an arrow (10) in the figure, the result of the skin results in the formation of the coaxial line (6). An antenna current flows from the inside of the outer conductor (7) to the outside, and tends to flow to the outside of the housing (1). However, when viewed from the housing (1) in the vicinity of the connection position between the first conductor (5) and the outer conductor (7) of the coaxial line (6), approximately one-quarter wavelength is a position where the impedance becomes high when viewed from the housing (1). A second conductor (9) whose one end is connected to the housing (1) is provided between the first conductor (5) and the housing (1) at a position (2) to form a so-called choke structure. Therefore, the above-mentioned antenna current which tends to flow to the outer surface of the housing (1) is suppressed. Therefore, the first conductor (5) functions as a ground wire, and the whip antenna (2)
The induced current from the first conductor (5) is generated in the first conductor (5) and the housing (1)
It does not affect the outer surface of the vehicle.
以上のように、この発明の無線機では、筐体（１）の
外側に筐体（１）に触れたときにアンテナ特性に影響を
与えるようなホイップアンテナ（２）からの誘起電流や
同軸線路（６）の外導体（７）からのアンテナ電流が流
れないので、筐体に触れたときのアンテナ電流の漏洩に
よる特性劣化を防止でき、通話状態において良好な感度
を有する無線機を得られる効果がある。As described above, according to the wireless device of the present invention, the induced current from the whip antenna (2) or the coaxial line which affects the antenna characteristics when the case (1) is touched outside the case (1). Since the antenna current does not flow from the outer conductor (7) of (6), it is possible to prevent the characteristic deterioration due to the leakage of the antenna current when touching the housing, and to obtain a wireless device having good sensitivity in a call state. There is.
第３図は第１図に示したこと発明の無線機の第二の導
体（９）の部分の他の構成例を示す第２図同様の断面図
である。図において、（11）は誘電体基板であり、
（１）〜（９）は第２図と同一のものである。第二の導
体（９）は誘電体基板（11）の面上に蒸着等で導体層を
設けることにより形成でき、製造が容易である。FIG. 3 is a sectional view similar to FIG. 2, showing another example of the configuration of the second conductor (9) of the wireless device of the invention shown in FIG. In the figure, (11) is a dielectric substrate,
(1) to (9) are the same as those in FIG. The second conductor (9) can be formed by providing a conductor layer on the surface of the dielectric substrate (11) by vapor deposition or the like, and is easy to manufacture.
第４図は第１図に示したこの発明の無線機の他の構成
例を一部切り欠いて示す斜視図、第５図は第４図の主要
部のＡ−Ａにおける断面図であり、第１図同様の４分の
１波長のホイップアンテナが筐体に取り付けられた例を
示している。ここでは、同軸線路（６）の外導体（７）
と筐体（１）とは第１図および第２図に示した実施例の
ように第二の導体（９）の近傍で接続されておらず、通
常筐体（１）の内部に収納される送信回路または受信回
路のアースを介す等して接続されている。図において、
（１）〜（10）は第１図および第２図に示した実施例と
同一または相当部分であり、（12）は図中に矢印（10）
で経路を示した外導体（７）の内側から外側へ流れ出た
アンテナ電流が送信回路または受信回路のアースを介す
等して筐体（１）の内面に流れ、筐体（１）の外側へ流
れようとする経路を示す矢印である。なお、この実施例
においても第一の導体（５）は例えば概略４分の１波長
の長さの、一直線上に配置された２本の導体棒であり、
筐体（１）の上面の近くに設けられている。FIG. 4 is a partially cutaway perspective view showing another example of the configuration of the wireless device of the present invention shown in FIG. 1, and FIG. 5 is a sectional view taken along line AA of the main part of FIG. 1 shows an example in which a quarter-wave whip antenna similar to FIG. 1 is attached to a housing. Here, the outer conductor (7) of the coaxial line (6)
The housing and the housing (1) are not connected near the second conductor (9) as in the embodiment shown in FIGS. 1 and 2, and are usually housed inside the housing (1). Connected via a ground of a transmitting circuit or a receiving circuit. In the figure,
(1) to (10) are the same as or equivalent to the embodiment shown in FIGS. 1 and 2, and (12) is an arrow (10) in the figure.
The antenna current flowing from the inside to the outside of the outer conductor (7) whose path has been shown flows through the inner surface of the housing (1) through the ground of the transmitting circuit or the receiving circuit, and the like, and the outside of the housing (1). It is an arrow indicating a route to be flowed to. Also in this embodiment, the first conductor (5) is, for example, two conductor rods having a length of approximately a quarter wavelength and arranged in a straight line.
It is provided near the upper surface of the housing (1).
次に動作について説明する。 Next, the operation will be described.
上記のように構成された無線機では、第１図に示した
実施例同様、給電点（３）でホイップアンテナ（２）を
給電すると第一の導体（５）を地導体として共振し、ホ
イップアンテナ（２）の上に電流分布（４）の電流が流
れ、空間へ電波が放射される。また、このとき、第一の
導体（５）は筐体（１）の上面の近くに設けられている
ので、矢印（10）で経路を示しように同軸線路（６）の
外導体（７）の内側から外側へアンテナ電流が流れ、矢
印（12）で経路を示すように筐体（１）の外側へ流れよ
うとする。しかしながら、第一の導体（５）と同軸線路
（６）の外導体（７）との接続位置近傍の筐体（１）か
ら見たときに高インパーダンスとなる位置である概略４
分の１波長の位置でその一端が筐体（１）に接続された
第二の導体（９）が第一の導体（５）と筐体（１）との
間に設けられ、いわゆるチョーク構造を成しているた
め、矢印（12）で経路を示す筐体（１）の外面へ流れよ
うとするアンテナ電流を抑圧する。従って、第一の導体
（５）は地線として機能し、ホイップアンテナ（２）か
らの誘起電流は第一の導体（５）に生じ、筐体（１）の
外面へは影響を与えない。In the wireless device configured as described above, similarly to the embodiment shown in FIG. 1, when the whip antenna (2) is fed at the feeding point (3), the first conductor (5) resonates as a ground conductor and the whip is resonated. The current of the current distribution (4) flows on the antenna (2), and a radio wave is radiated into space. Also, at this time, since the first conductor (5) is provided near the upper surface of the housing (1), the outer conductor (7) of the coaxial line (6) as indicated by a path by an arrow (10). The antenna current flows from the inside to the outside of the housing (1), and tends to flow to the outside of the housing (1) as indicated by the path indicated by the arrow (12). However, when viewed from the housing (1) near the connection position between the first conductor (5) and the outer conductor (7) of the coaxial line (6), the position where the impedance becomes high when viewed from the housing (1) is approximately 4.
A so-called choke structure in which a second conductor (9) whose one end is connected to the housing (1) at a position of one-half wavelength is provided between the first conductor (5) and the housing (1). Therefore, the antenna current that tends to flow to the outer surface of the housing (1) whose path is indicated by the arrow (12) is suppressed. Therefore, the first conductor (5) functions as a ground wire, and the induced current from the whip antenna (2) is generated in the first conductor (5) and does not affect the outer surface of the housing (1).
以上のように、この実施例においても、上記実施例同
様の効果を奏する。As described above, also in this embodiment, the same effects as those in the above embodiment can be obtained.
第６図は第４図に示したこの発明の無線機における給
電線およびアンテナである同軸線路（６）とホイップア
ンテナ（２）の筐体（１）への保持部の構成例を示す、
第５図同様の断面図である。図において、（13）は誘電
体よりなり、地線である第一の導体（５）が入るすりわ
りを設けたリングであり、（１）〜（９）は第５図と同
一のものである。リング（13）を設けることにより同軸
線路（６）の筐体（１）との位置関係を均等にして保持
でき、ホイップアンテナ（２）の保持も容易にできる利
点がある。FIG. 6 shows an example of the configuration of the feeder and the coaxial line (6), which is an antenna, and the holding portion of the whip antenna (2) in the housing (1) in the wireless device of the present invention shown in FIG.
FIG. 6 is a sectional view similar to FIG. 5. In the figure, (13) is a ring made of a dielectric material and provided with a slot into which the first conductor (5), which is a ground wire, enters, and (1) to (9) are the same as those in FIG. is there. By providing the ring (13), there is an advantage that the positional relationship between the coaxial line (6) and the housing (1) can be maintained uniformly, and the holding of the whip antenna (2) can be facilitated.
第７図はこの発明の無線機の他の実施例の構成を示す
斜視図、第８図および第９図は第７図の主要部のＡ−Ａ
における断面図であり、第１図同様の４分の１波長のホ
イップアンテナが筐体に取り付けられた例を示してい
る。なお、この実施例においても第一の導体（５）は例
えば概略４分の１波長の長さ、一直線上に配置された２
本の導体棒であり、筐体（１）の上面の近くに設けられ
ている。図において、（14）は第二の導体であって、第
１図または第４図に示した第二の導体（９）の変形例で
ある導体板、（15）は誘電体板、（１）〜（12）は第４
図および第５図と同一あるいは相当するものである。な
お、導体板（14）は製造上の利便をはかるため、図示し
たように二方向のみで筐体（１）に接続され、他の二方
向は接続されていない。また、第８図は第７図において
筐体（１）と同軸線路（６）の外導体（７）とは図示の
ごとく接続されている場合であり、第９図は第７図にお
いて同軸線路（６）の外導体（７）と筐体（１）とは導
体板（14）の近傍で接続されておらず、通常筐体（１）
の内部に収納される送信回路または受信回路のアースを
介する等して接続されている場合である。FIG. 7 is a perspective view showing the configuration of another embodiment of the wireless device of the present invention, and FIGS. 8 and 9 are AA of the main part of FIG.
FIG. 2 is a cross-sectional view showing an example in which a quarter-wave whip antenna similar to FIG. 1 is attached to a housing. Also in this embodiment, the first conductor (5) has a length of, for example, approximately a quarter wavelength and is arranged on a straight line.
The conductor rods are provided near the upper surface of the housing (1). In the figure, (14) is a second conductor, a conductor plate which is a modified example of the second conductor (9) shown in FIG. 1 or FIG. 4, (15) is a dielectric plate, (1) ) To (12) are the fourth
It is the same as or equivalent to FIG. 5 and FIG. The conductor plate (14) is connected to the housing (1) only in two directions as shown in the drawing, and is not connected in the other two directions for convenience in manufacturing. FIG. 8 shows a case where the housing (1) and the outer conductor (7) of the coaxial line (6) are connected as shown in FIG. 7, and FIG. 9 shows a case where the coaxial line is used in FIG. The outer conductor (7) of (6) and the housing (1) are not connected near the conductor plate (14), and are usually connected to the housing (1).
Are connected via the ground of a transmitting circuit or a receiving circuit housed inside the device.
次に動作について説明する。 Next, the operation will be described.
上記のように構成された無線機では、上記実施例同
様、給電点（３）でホイップアンテナ（２）を給電する
と第一の導体（５）を地導体として共振し、ホイップア
ンテナ（２）の上に電流分布（４）の電流が流れ、空間
へ電波が放射される。このとき、第８図に示した構成の
場合には、第一の導体（５）は筐体（１）の上面の近く
に設けられているので、図中に矢印（10）で経路を示す
ように、同軸路線（６）の外導体（７）の内側から外側
へアンテナ電流が流れ、筐体（１）の外側へ流れようと
する。また、第９図に示した構成の場合には、第一の導
体（５）の筐体（１）の上面の近くに設けられているの
で、矢印（10）で経路を示すように同軸線路（６）の外
導体（７）の内側から外側へアンテナ電流が流れ、送信
回路または受信回路のアースを介す等して筐体（１）に
接続され、矢印（12）で経路を示すように筐体（１）の
外側へ流れようとする。しかしながら、第一の導体
（５）と同軸路線（６）の外導体（７）との接続位置近
傍の筐体（１）から見たときに高インピーダンスとなる
位置で筐体（１）に接続された導体板（14）が第一の導
体（５）と筐体（１）との間に設けられ、変形チョーク
構造を成しているため、筐体（１）の外面へ流れようと
する上記アンテナ電流を実用上問題ない程度までに抑圧
する。これについて第10図に実験結果を示す。第10図は
上記第８図に示した実施例の一試作品について、ホイッ
プアンテナの入力インピーダンスを筐体を手で漏った場
合と持たない場合に置いて測定した結果を死すスミス図
である。第10図から入力インピーダンスの変化が小さい
ことがわかる。In the wireless device configured as described above, when the whip antenna (2) is fed at the feed point (3), the first conductor (5) resonates as a ground conductor, and the whip antenna (2) has The current of the current distribution (4) flows above, and a radio wave is radiated into space. At this time, in the case of the configuration shown in FIG. 8, since the first conductor (5) is provided near the upper surface of the housing (1), the path is indicated by an arrow (10) in the figure. Thus, the antenna current flows from the inside to the outside of the outer conductor (7) of the coaxial line (6), and tends to flow to the outside of the housing (1). Further, in the case of the configuration shown in FIG. 9, since the first conductor (5) is provided near the upper surface of the housing (1), the coaxial line is indicated by an arrow (10) as indicated by a path. An antenna current flows from the inside to the outside of the outer conductor (7) of (6), and is connected to the housing (1) through the ground of the transmission circuit or the reception circuit, and the path is indicated by an arrow (12). Tends to flow outside the housing (1). However, the first conductor (5) and the outer conductor (7) of the coaxial line (6) are connected to the housing (1) at a position where the impedance becomes high when viewed from the housing (1) near the connection position. The provided conductor plate (14) is provided between the first conductor (5) and the housing (1), and forms a deformed choke structure, so that it tends to flow to the outer surface of the housing (1). The above-mentioned antenna current is suppressed to such an extent that there is no practical problem. FIG. 10 shows the experimental results. FIG. 10 is a Smith diagram showing the result of measuring the input impedance of the whip antenna with and without the case of the case of the prototype of the embodiment shown in FIG. . FIG. 10 shows that the change in input impedance is small.
以上のように、この実施例においても、上記第１図ま
たは第４図に示した実施例同様の効果を奏する。さら
に、この実施例においては、導体板（14）を二方向のみ
で筐体（１）に接続し、他の二方向は接続しないので、
製造上の利便をはかれる。また、導体板（14）は誘電体
板（15）の面上に蒸着等で導体層を設けることにより形
成でき、製造が容易である。As described above, also in this embodiment, the same effects as those in the embodiment shown in FIG. 1 or FIG. 4 can be obtained. Further, in this embodiment, the conductor plate (14) is connected to the housing (1) only in two directions, and not connected in the other two directions.
Manufacturing convenience. Further, the conductor plate (14) can be formed by providing a conductor layer on the surface of the dielectric plate (15) by vapor deposition or the like, and is easy to manufacture.
第11図はこの発明の無線機のまた他の実施例の構成を
示す斜視図、第12図は第11図の主要部のＡ−Ａにおける
断面図であり、第１図同様の４分の１波長のホイップア
ンテナが筐体に取り付けられた例を示している。図にお
いて、（１）〜（15）は第７図および第８図に示した実
施例と同一または相当部分であり、（16）は表面に第一
の導体（５）が形成された誘電体層である。この実施例
では、設計上の都合でホイップアンテナが筐体の端へ寄
った位置に取り付けられた場合であり、地線を形成する
第一の導体（５）は通常必要な４分の１波長の長さを図
示のように折り曲げて形成したものである。また、第一
の導体（５）は、誘電体層（16）として誘電体基板を用
い、その面上に蒸着等で導体層を設けることにより形成
したものや、誘電体フィルムに印刷した導体パターンで
あっても良い。FIG. 11 is a perspective view showing the configuration of still another embodiment of the radio device of the present invention, and FIG. 12 is a cross-sectional view taken along line AA of the main part of FIG. An example in which a one-wavelength whip antenna is attached to a housing is shown. In the figure, (1) to (15) are the same as or equivalent to the embodiment shown in FIGS. 7 and 8, and (16) is a dielectric having a first conductor (5) formed on the surface. Layer. In this embodiment, the whip antenna is mounted at a position close to the edge of the housing for design reasons, and the first conductor (5) forming the ground wire usually has a required quarter-wavelength. Is formed by bending the length as shown. The first conductor (5) may be formed by using a dielectric substrate as the dielectric layer (16) and providing a conductor layer on the surface by vapor deposition or the like, or a conductor pattern printed on a dielectric film. It may be.
なお、この実施例の動作は第７図に示した実施例と同
様であり、説明を省略する。The operation of this embodiment is the same as that of the embodiment shown in FIG. 7, and the description is omitted.
以上のように、この実施例においては、上記第１図，
第４図または第７図に示した実施例と同様の効果を奏す
る。さらに、この実施例においては、ホイップアンテナ
（２）が筐体の端へ寄った位置に取り付けられた場合で
も、第一の導体（５）および第二の導体である導体板
（14）を筐体（１）の面上に設けることができ、小型で
携帯に便利な無線機を得られる効果がある。As described above, in this embodiment, FIG.
The same effects as those of the embodiment shown in FIG. 4 or FIG. 7 can be obtained. Further, in this embodiment, even when the whip antenna (2) is mounted at a position close to the end of the housing, the first conductor (5) and the conductor plate (14) as the second conductor are connected to the housing. The wireless device can be provided on the surface of the body (1), and has an effect of obtaining a small and portable wireless device.
なお、以上の実施例においては、アンテナとして４分
の１波長のホイップアンテナを用いたものについて説明
したが、この発明はダイポールアンテナ等の他の無線機
用アンテナを用いた場合にも同様に適用できることはい
うまでもない。In the above embodiments, the case where a quarter-wave whip antenna is used as the antenna has been described. However, the present invention is similarly applied to a case where another radio antenna such as a dipole antenna is used. It goes without saying that you can do it.
また、以上の実施例においては、第一の導体は筐体面
の近くに設けられている概略４分の１波長の長さ反対方
向に配置された２つの導体である場合について説明した
が、この発明は第一の導体がアンテナへの給電線の接続
近傍の給電線の地導体に一端が接続され、アンテナの地
線を形成するものであれば良く、２つの導体に限るもの
ではない。ここで、第一の導体は小型で携帯および取り
扱いに便利な無線機を実現するために通常筐体面の近く
に設けられるもので、この場合にはこの発明の効果が顕
著に現れる。また、第一の導体は上記２つの導体で地線
として実用上必要十分な効果が得られる。Further, in the above embodiment, the case where the first conductor is two conductors provided near the housing surface and arranged in the opposite direction by a length of about a quarter wavelength has been described. The invention is not limited to two conductors as long as the first conductor has one end connected to the ground conductor of the feed line near the connection of the feed line to the antenna to form the ground line of the antenna. Here, the first conductor is usually provided near the surface of the housing in order to realize a small-sized radio which is easy to carry and handle. In this case, the effect of the present invention is remarkably exhibited. In addition, the first conductor is a ground wire composed of the above-mentioned two conductors, and a practically necessary and sufficient effect can be obtained.
なお、以上の実施例では送信の場合について説明した
が、この発明はこの種の装置で一般的に送信と可逆であ
る受信の場合にも同様に適用できることはいうまでもな
い。Although the case of transmission has been described in the above embodiment, it goes without saying that the present invention can be similarly applied to the case of reception that is generally reversible to transmission in this type of apparatus.
［発明の効果］ 以上のように、この発明の無線機では、アンテナの地
線を形成する第一の導体と。上記第一の導体と筐体との
間に設けられ、上記第一の導体と上記給電線の地導体と
の族位置近傍の筐体から見たときに高インピーダンスと
なる位置でその一端が筐体に接続された第二の導体とを
備えたので、アンテナから筐体への誘起電流が抑止さ
れ、かつ、給電線の地導体から筐体の外面へ流れるアン
テナ電流が抑圧され、筐体に触れたときの電流の漏洩に
よる特性劣化を防止できる効果がある。[Effect of the Invention] As described above, in the wireless device of the present invention, the first conductor forming the ground wire of the antenna. One end is provided between the first conductor and the housing, and one end of the housing has a high impedance when viewed from a housing near a family position between the first conductor and the ground conductor of the power supply line. With the second conductor connected to the body, the induced current from the antenna to the housing is suppressed, and the antenna current flowing from the ground conductor of the feeder line to the outer surface of the housing is suppressed. This has the effect of preventing characteristic deterioration due to leakage of current when touched.
第１図はこの発明の無線機の一実施例の構成を一部切り
欠いて示す斜視図、第２図は第１図の主要部のＡ−Ａに
おける断面図、第３図は第１図に示したこの発明の無線
機の第二の導体の部分の他の構成例を示す断面図、第４
図は第１図に示したこの発明の無線機の他の構成例を一
部切り欠いて示す斜視図、第５図は第４図の主要部のＡ
−Ａにおる断面図、第６図は第４図に示したこの発明の
無線機における給電線およびアンテナの筐体への保持部
の構成例を示す断面図、第７図はこの発明の無線機の他
の実施例の構成を示す斜視図、第８図および第９図は第
７図の主要部のＡ−Ａにおける断面図、第10図は第８図
に示した実施例の一試作品について、ホイップアンテナ
の入力インピーダンスを測定した結果を示すスミス図、
第11図はこの発明の無線機のまた他の実施例の構成を示
す斜視図、第12図は第11図の主要部のＡ−Ａにおける断
面図、第13図は、従来の無線機を示す斜視図である。 図において、（１）は筐体、（２）はホイップアンテ
ナ、（３）は給電点、（４）は電流分布、（５）は第一
の導体、（６）は同軸線路、（７）は外導体、（８）は
内導体、（９）は第二の導体、（10）は矢印、（11）は
誘電体基板、（12）は矢印、（13）はリング、（14）は
導体板、（15）は誘電体板、（16）は誘電体層である。 なお、図中同一符号は同一または相当部分を示す。FIG. 1 is a partially cutaway perspective view showing a configuration of an embodiment of a wireless device according to the present invention, FIG. 2 is a sectional view taken along line AA of FIG. 1, and FIG. FIG. 4 is a cross-sectional view showing another configuration example of the second conductor portion of the wireless device of the present invention shown in FIG.
FIG. 5 is a perspective view, partially cut away, showing another example of the configuration of the wireless device of the present invention shown in FIG. 1, and FIG.
FIG. 6 is a sectional view showing an example of the configuration of the feeder and the holding portion of the antenna to the housing in the wireless device of the present invention shown in FIG. 4, and FIG. 7 is a wireless view of the present invention. 8 and 9 are cross-sectional views taken along line AA of the main part of FIG. 7, and FIG. 10 is a trial view of the embodiment shown in FIG. Smith diagram showing the result of measuring the input impedance of the whip antenna for the work,
FIG. 11 is a perspective view showing the configuration of still another embodiment of the wireless device of the present invention, FIG. 12 is a sectional view taken along line A--A of FIG. 11, and FIG. FIG. In the figure, (1) is a housing, (2) is a whip antenna, (3) is a feeding point, (4) is a current distribution, (5) is a first conductor, (6) is a coaxial line, and (7). Is an outer conductor, (8) is an inner conductor, (9) is a second conductor, (10) is an arrow, (11) is a dielectric substrate, (12) is an arrow, (13) is a ring, and (14) is A conductor plate, (15) is a dielectric plate, and (16) is a dielectric layer. In the drawings, the same reference numerals indicate the same or corresponding parts.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 砂原 米彦 神奈川県鎌倉市大船５丁目１番１号 三 菱電機株式会社電子システム研究所内 (72)発明者 松永 誠 神奈川県鎌倉市大船５丁目１番１号 三 菱電機株式会社電子システム研究所内 (56)参考文献 特開 平３−183201（ＪＰ，Ａ) 実開 昭56−93049（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.6，ＤＢ名) H01Q 1/24 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Yonehiko Sunahara 5-1-1, Ofuna, Kamakura City, Kanagawa Prefecture Inside the Electronic Systems Research Laboratories, Mitsubishi Electric Corporation (72) Inventor Makoto Matsunaga 5-1-1, Ofuna, Kamakura City, Kanagawa Prefecture No. 1 Mitsubishi electric Co., Ltd. electronic systems within the Institute (56) reference Patent flat 3-183201 (JP, a) JitsuHiraku Akira 56-93049 (JP, U) (58 ) investigated the field (Int.Cl. 6 , DB name) H01Q 1/24
Claims (1)
ナと、上記アンテナへの給電線とを備えた無線機におい
て、上記アンテナへの上記給電線の接続部近傍の上記給
電線の地導体に一端が接続され、上記アンテナの地線を
形成する第一の導体と、上記第一の導体と上記筐体との
間に設けられ、上記第一の導体と上記給電線の地導体と
の接続位置近傍の筐体から見たときに高インピーダンス
となる位置でその一端が筐体に接続され、上記給電線の
地導体から上記筐体の外面へ流れる電流を抑圧する第二
の導体とを備えたことを特徴とする無線機。1. A wireless device having a housing, an antenna attached to the housing, and a feeder to the antenna, wherein a ground of the feeder near a connection portion of the feeder to the antenna. One end is connected to a conductor, a first conductor forming a ground wire of the antenna, and provided between the first conductor and the housing, and a ground conductor of the first conductor and the feeder line. One end is connected to the housing at a position where the impedance is high when viewed from the housing near the connection position, and a second conductor that suppresses a current flowing from the ground conductor of the power supply line to the outer surface of the housing. A wireless device comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2308131A JP2945127B2 (en) | 1990-11-14 | 1990-11-14 | wireless device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2308131A JP2945127B2 (en) | 1990-11-14 | 1990-11-14 | wireless device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04179302A JPH04179302A (en) | 1992-06-26 |
| JP2945127B2 true JP2945127B2 (en) | 1999-09-06 |
Family
ID=17977257
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2308131A Expired - Fee Related JP2945127B2 (en) | 1990-11-14 | 1990-11-14 | wireless device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2945127B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3123386B2 (en) * | 1995-03-03 | 2001-01-09 | 株式会社村田製作所 | Strip line cable with integrated antenna |
| KR101122457B1 (en) | 2008-03-28 | 2012-03-02 | 교세라 가부시키가이샤 | Radio communication device |
-
1990
- 1990-11-14 JP JP2308131A patent/JP2945127B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04179302A (en) | 1992-06-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4481716B2 (en) | Communication device | |
| US5231412A (en) | Sleeved monopole antenna | |
| US6590539B2 (en) | Antenna device in radio communication terminal | |
| US6031495A (en) | Antenna system for reducing specific absorption rates | |
| TWI435498B (en) | Multi-band dipole antennas | |
| JP3450967B2 (en) | Dual function antenna structure and portable wireless device having the same | |
| JPS61284102A (en) | Antenna for portable radio equipment | |
| JPH09107230A (en) | Antenna | |
| US20090213011A1 (en) | Dual-band dual-feed antenna | |
| WO2003041217A2 (en) | Multiband antenna formed of superimposed compressed loops | |
| JP2004128605A (en) | Antenna structure and communication system therewith | |
| JP2008160411A (en) | Antenna device and portable radio device | |
| JP4170828B2 (en) | Antenna and dielectric substrate for antenna | |
| JP5104131B2 (en) | Radio apparatus and antenna provided in radio apparatus | |
| JPH09107229A (en) | Planar and nonplanar types double c-patch antenna with different aperture portion shapes | |
| JPH11340726A (en) | Antenna device | |
| JP2581834B2 (en) | Antenna device | |
| JP4968033B2 (en) | Antenna device | |
| JP2945127B2 (en) | wireless device | |
| JPH11274845A (en) | Antenna system | |
| JPH05299929A (en) | Antenna | |
| JP2009290687A (en) | Antenna device and radio communication device | |
| JP2002353719A (en) | Sar reduction device and wireless communication device | |
| JPH10256818A (en) | Antenna system and its mounting structure | |
| JP4460046B2 (en) | Multi-frequency antenna |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080625 Year of fee payment: 9 |
|
| LAPS | Cancellation because of no payment of annual fees |