JP3521928B2 - Wireless telephone equipment - Google Patents
Wireless telephone equipmentInfo
- Publication number
- JP3521928B2 JP3521928B2 JP2852593A JP2852593A JP3521928B2 JP 3521928 B2 JP3521928 B2 JP 3521928B2 JP 2852593 A JP2852593 A JP 2852593A JP 2852593 A JP2852593 A JP 2852593A JP 3521928 B2 JP3521928 B2 JP 3521928B2
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- Prior art keywords
- conductor wires
- stubs
- transmission
- antenna
- conductor
- 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.)
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Description
【発明の詳細な説明】
【０００１】
【産業上の利用分野】この発明は、例えば、携帯用の無
線電話装置に関する。
【０００２】
【従来の技術】近時、いわゆるパーソナルハンディホン
などの携帯電話が、ビジネスなどに用いられている。こ
の携帯電話は、ＵＨＦ帯の無線回線を介して、最寄りの
基地局と接続され、比較的広範囲の移動が可能である。
そして、従来の携帯電話では、送受信用のアンテナは、
通常、送受信周波数に対応する波長λの１／４の長さの
単一導体であり、筐体から引き出して用いられる。
【０００３】
【発明が解決しようとする課題】ところで、携帯電話に
は、音声信号がデジタル処理される、デジタル携帯電話
や、デジタルコードレス電話などが提案されており、そ
れぞれの送受信周波数には、例えば、１．５ＧＨｚ帯や
１．９ＧＨｚ帯が使用されようとしている。このような
高い周波数になると、その波長と携帯電話の筐体の大き
さとが概ね等しくなり、アンテナと筐体との取りまとめ
がしやすくなる。
【０００４】ところが、従来のような単一導体のアンテ
ナでは、導体径が小さい場合、周波数帯域が狭いという
問題があった。また、広帯域化のため、アンテナの単一
導体を大径化した場合は、アンテナの占有空間が増大し
て、筐体の形状が大きくなってしまうという問題が生ず
る。
【０００５】かかる点に鑑み、この発明の目的は、筐体
の形状を大きくすることなく、上述のような高周波数帯
で使用されるλ／４アンテナを広帯域化することができ
る無線電話装置を提供するところにある。
【０００６】
【課題を解決するための手段】前記課題を解決するた
め、この発明による無線電話装置は、送話用のマイクロ
ホンと送受信用のアンテナとを備える無線電話装置にお
いて、近接して並列に配設される送受信波長の１／４の
長さの複数の導体線条と、前記複数の導体線条の一方お
よび他方の端部のそれぞれにおいて当該複数の導体線条
の隣接する端部を互いに接続して、前記複数の導体線条
を前記送受信用のアンテナとして使用するようにするた
めの第１の所定容量の複数個の第１のコンデンサと、前
記複数の導体線条の一方および他方の端部のそれぞれに
一端が接続される、前記送受信波長の１／４の長さの複
数のスタブと、前記複数のスタブのそれぞれの他端と接
地との間に接続される第２の所定容量の複数個の第２の
コンデンサと、を備え、前記複数の導体線条の一端側か
ら前記送受信用のアンテナの給電点が導出されると共
に、前記送話用のマイクロホンからの信号は、複数の前
記スタブを通じて前記複数の導体線条の他方の端部に供
給され、前記複数の導体線条のそれぞれが前記マイクロ
ホンからの信号伝送線として使用されるようにしたこと
を特徴とする。
【０００７】
【作用】かかる構成によれば、高周波領域では、λ／４
スタブ２３〜２６の各一端２３ｏ〜２６ｏが開放状態と
なると共に、導体線条２１，２２の両端が短絡されて、
等価的に、単一の大径導体となり、広帯域特性のアンテ
ナが得られる。また、音声周波数領域では、各コンデン
サＣ20〜Ｃ26が開放状態となって、導体線条２１，２２
を通じて、マイクロホン１１からの音声信号が伝送され
る。
【０００８】
【実施例】以下、図１〜図４を参照しながら、この発明
による無線電話装置の一実施例について説明する。この
発明の一実施例の電気的構成を図１に示し、機械的構成
を図２に示す。
【０００９】図２において、１FLは折畳み式の筐体であ
って、主・副の部分筐体２，３から構成され、支軸４に
より回動自在に係合される。主筐体２には、テンキーな
どの操作キー５が配設されると共に、受話器（スピー
カ）用の開口６が穿設される。また、主筐体２の内部に
は、後述のような電話機回路の主要部が収納される。
【００１０】一方、副筐体３には、送話器（マイクロホ
ン）用の開口７が穿設され、副筐体３の内部に、マイク
ロホンを含む電話機回路の残部が収納される。また、副
筐体３の上面の溝ないしは凹部３ｇに、後述の送受信ア
ンテナの２本の導体線条２１，２２が配設され、この導
体線条２１，２２の端部には、副筐体３の内部で、後述
のような回路ないし回路素子が接続される。そして、通
話時には、図２に示すように、副筐体３が展開される。
【００１１】図１において、１０は電話機回路を、２０
はアンテナをそれぞれ全体として示す。電話機回路１０
のマイクロホン１１からのアナログ音声信号が送信信号
処理回路１２に供給されて、所定の送信データ（ベース
バンド信号）が形成され、この送信データが送信回路１
３に供給されて、ＵＨＦ帯の所定の周波数の送信信号が
生成され、共用回路１４を介して、アンテナ２０から送
出される。
【００１２】一方、アンテナ２０の受信信号は、共用回
路１４，受信回路１５を経て、受信信号処理回路１６に
供給されて、受信データがアナログ音声信号に変換さ
れ、スピーカ１７に供給される。
【００１３】この実施例では、アンテナ２０は、近接し
て並列に配設された２本の導体線条２１，２２と、この
導体線条２１，２２の隣接する端部２１ａ，２２ａ；２
１ｂ，２２ｂを接続するコンデンサＣ21，Ｃ22；Ｃ20と
から構成される。導体線条２１，２２は、例えば、硬銅
線ないしクロム鍍金黄銅線であって、その長さは、例え
ば、１．９ＧＨｚの送受信周波数に対応する波長λの１
／４（約３８ｍｍ）とされ、両導体線条２１，２２の間
隔は、例えばλ／１０程度とされる。
【００１４】また、コンデンサＣ21，Ｃ22；Ｃ20の容量
は、そのインピーダンスが送受信周波数帯で実質的にゼ
ロとなると共に、音声周波数帯では無限大となるよう
に、例えば、それぞれ１０〜１００ｐＦに設定される。
【００１５】さらに、この実施例では、導体線条２１，
２２の端部２１ａ〜２２ｂに、電気長が１／４波長のス
タブ２３〜２６の一端２３ｏ〜２６ｏがそれぞれ接続さ
れ、各スタブ２３〜２６の他端２３ｓ〜２６ｓがコンデ
ンサＣ23〜Ｃ26を介して接続される。このコンデンサＣ
23〜Ｃ26の容量は、上述と同様に、１０〜１００ｐＦに
それぞれ設定される。そして、スタブ２５，２６の他端
２５ｓ，２６ｓにマイクロホン１１が接続され、スタブ
２３，２４の他端２３ｓ，２４ｓが送信信号処理回路１
２に接続されて、マイクロホン１１からの音声信号が処
理回路１２に供給される。
【００１６】図３に示すように、この実施例では、スタ
ブ２３〜２６は、高周波損失の少ない適宜の絶縁材を用
いた印刷配線板（基板）２７の上下両面に形成された細
条導体２３ｔ，２３ｂ‥‥２６ｔ，２６ｂにより、レッ
ヘル線（平行２線）型に構成され、導体線条２１，２２
の軸方向と垂直に配設される。
【００１７】そして、同様の絶縁材からなる、適宜の高
さの１対のスペーサ２８（簡単のため他方は図示せず）
が基板２７上に配設されて、導体線条２１，２２がそれ
ぞれ空間に支持される。
【００１８】なお、λ／４スタブ２３〜２６の各導体２
３ｔ〜２６ｂの機械長は、周知のように、基板２７の誘
電率が高いほど短くすることができる。また、図示は省
略するが、基板２７の下面に形成された導体２３ｂ〜２
６ｂを下面の周縁部ないしは全域に拡大して接地導体と
することにより、スタブ２３〜２６を通常のマイクロス
トリップ線路型に構成することもできる。さらに、導体
線条２１，２２は、棒状に限らず、例えば、薄板状でも
よい。
【００１９】上述のような構成により、この実施例のア
ンテナ２０は、送受信周波数帯で、各λ／４スタブ２３
〜２６の一端２３ｏ〜２６ｏが電気的に開放されて、導
体線条２１，２２に何等の影響を及ぼすことがなく、２
本の導体線条２１，２２は、等価的に、図４Ａに示すよ
うに、単一の大径の導体２９となり、よく知られていよ
うに、アンテナとしてのＱが低下して、広帯域特性が得
られる。しかも、アンテナの単一導体を機械的に大径化
した場合に比べて、占有空間が少なく、アンテナと筐体
との取りまとめが容易となる。
【００２０】また、音声周波数帯では、各コンデンサＣ
20〜Ｃ26のインピーダンスが無限大となり、マイクロホ
ン１１からの音声信号に何等の影響を及ぼすことがな
く、導体線条２１，２２とλ／４スタブ２３〜２６と
は、図４Ｂに示すように、マイクロホン１１と処理回路
１２の間の音声信号伝送線としても利用される。
【００２１】上述の実施例では、通話時に、図２に示す
ように、副筐体３が展開されて、その内部に収納されて
いる送受信アンテナ２０が、マイクロホン１１と共に、
主筐体２から離れるようにしたが、図５に示すように、
通常のソリッドな単一の筐体１SLを用い、この筐体１SL
の内部に電話機回路１０とアンテナ２０とを収納しても
よい。
【００２２】また、図６に示すように、アンテナ２０と
マイクロホン１１とを筐体１の外に起倒自在に装着する
ようにしてもよい。この場合、導体線条２１，２２は、
所要の機械的強度を得るため、例えば、管状に形成さ
れ、そのマイクロホン側の端部２１ｂ，２２ｂには、適
宜の低損失絶縁材からなるホルダ３１を介して、金属構
造物としての小型のマイクロホン１１が取り付けられ
る。
【００２３】そして、マイクロホン１１と導体線条２
１，２２の端部２１ｂ，２２ｂとは、前述のようなλ／
４スタブに代えて、適宜のＲＦチョーク３２，３３によ
り接続され、導体線条２１，２２とマイクロホン１１と
が高周波的に切り放される。
【００２４】
【発明の効果】以上説明したように、この発明によれ
ば、無線電話装置において、送受信波長の１／４の長さ
の複数の導体線条を近接して並列配設し、その隣接端部
を、所定容量のコンデンサを介して接続すると共に、複
数の導体線条の各端部に送受信波長の１／４の長さのス
タブの一端をそれぞれ接続し、各スタブの他端を所定容
量のコンデンサを介して接続するようにしたので、高周
波領域では、スタブの各一端が開放状態となると共に、
複数の導体線条の両端が短絡されて、等価的に、単一の
大径導体となり、占有空間の増大を抑えながら、広帯域
特性のアンテナが形成され、音声周波数領域では、全て
のコンデンサが開放状態となって、複数の導体線条をマ
イクロホンからの音声信号の伝送にも利用することがで
きる。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to, for example, a portable radio telephone device. 2. Description of the Related Art Recently, mobile phones such as so-called personal handy phones have been used for business and the like. This mobile phone is connected to the nearest base station via a UHF band wireless line, and can move in a relatively wide range.
And in the conventional mobile phone, the antenna for transmission and reception is
Usually, it is a single conductor having a length of の of the wavelength λ corresponding to the transmission / reception frequency, and is used by being pulled out of the housing. [0003] By the way, digital cellular phones and digital cordless telephones, in which voice signals are digitally processed, have been proposed for cellular phones. , 1.5 GHz band and 1.9 GHz band are about to be used. At such a high frequency, the wavelength and the size of the housing of the mobile phone become substantially equal, and the antenna and the housing can be easily integrated. However, the conventional single-conductor antenna has a problem that the frequency band is narrow when the conductor diameter is small. In addition, when the diameter of a single conductor of the antenna is increased for broadening the band, there is a problem that the space occupied by the antenna increases and the shape of the housing increases. In view of the foregoing, an object of the present invention is to provide a radio telephone device capable of broadening the bandwidth of a λ / 4 antenna used in the above-mentioned high frequency band without enlarging the shape of a housing. To provide. [0006] In order to solve the above-mentioned problems, a wireless telephone device according to the present invention is provided in a wireless telephone device having a microphone for transmitting and an antenna for transmitting and receiving, in close proximity and in parallel. A plurality of conductor wires having a length of 1/4 of the transmission / reception wavelength to be provided, and adjacent ends of the plurality of conductor wires at one end and the other end of the plurality of conductor wires, respectively. A plurality of first capacitors having a first predetermined capacity for connecting and using the plurality of conductor wires as the transmitting / receiving antenna; and one and the other of the plurality of conductor wires. A plurality of stubs each having one end connected to each of the end portions and having a length of 1/4 of the transmission / reception wavelength; and a second predetermined capacitor connected between the other end of each of the plurality of stubs and ground. A plurality of second condensers A feed point of the transmitting / receiving antenna is derived from one end of the plurality of conductor wires, and a signal from the transmitting microphone is transmitted through the plurality of stubs. It is supplied to the other end of the wire, and each of the plurality of conductor wires is used as a signal transmission line from the microphone. According to this configuration, in the high frequency region, λ / 4
The ends 23o to 26o of the stubs 23 to 26 are opened, and both ends of the conductor strips 21 and 22 are short-circuited.
Equivalently, it becomes a single large-diameter conductor, and an antenna with wideband characteristics can be obtained. In the audio frequency range, each of the capacitors C20 to C26 is in an open state, and the conductor wires 21 and 22 are opened.
, A sound signal from the microphone 11 is transmitted. An embodiment of a radio telephone apparatus according to the present invention will be described below with reference to FIGS. FIG. 1 shows an electrical configuration of an embodiment of the present invention, and FIG. 2 shows a mechanical configuration. In FIG. 2, reference numeral 1FL denotes a foldable casing, which is composed of main and sub-partial casings 2 and 3 and is rotatably engaged by a support shaft 4. The main housing 2 is provided with operation keys 5 such as a numeric keypad and an opening 6 for a receiver (speaker). Further, main parts of a telephone circuit as described later are housed inside the main housing 2. On the other hand, an opening 7 for a transmitter (microphone) is formed in the sub-housing 3, and the rest of the telephone circuit including the microphone is housed inside the sub-housing 3. In addition, two conductor lines 21 and 22 of the transmission / reception antenna described later are disposed in grooves or recesses 3 g on the upper surface of the sub-housing 3. Inside the circuit 3, a circuit or a circuit element as described later is connected. Then, during a call, the sub-housing 3 is deployed as shown in FIG. In FIG. 1, reference numeral 10 denotes a telephone circuit;
Indicates an antenna as a whole. Telephone circuit 10
Is supplied to the transmission signal processing circuit 12 to form predetermined transmission data (baseband signal).
3, a transmission signal of a predetermined frequency in the UHF band is generated, and transmitted from the antenna 20 via the shared circuit 14. On the other hand, the reception signal of the antenna 20 is supplied to the reception signal processing circuit 16 via the common circuit 14 and the reception circuit 15, and the reception data is converted into an analog audio signal and supplied to the speaker 17. In this embodiment, the antenna 20 is composed of two conductor wires 21 and 22 disposed in parallel and close to each other, and adjacent ends 21a and 22a; 2 of the conductor wires 21 and 22.
1b and 22b, and capacitors C21 and C22; C20. The conductor strips 21 and 22 are, for example, hard copper wires or chrome-plated brass wires, and have a length of, for example, 1 of a wavelength λ corresponding to a transmission and reception frequency of 1.9 GHz.
/ 4 (approximately 38 mm), and the interval between the conductor wires 21 and 22 is, for example, about λ / 10. The capacitance of each of the capacitors C21 and C22; C20 is set to, for example, 10 to 100 pF so that the impedance becomes substantially zero in the transmission and reception frequency band and becomes infinite in the audio frequency band. You. Further, in this embodiment, the conductor filaments 21,
The ends 23a to 26o of the stubs 23 to 26 having an electric length of 1/4 wavelength are connected to the ends 21a to 22b of the stub 22, respectively, and the other ends 23s to 26s of the stubs 23 to 26 are connected via capacitors C23 to C26. Connected. This capacitor C
The capacities of 23 to C26 are set to 10 to 100 pF, respectively, as described above. The microphone 11 is connected to the other ends 25 s and 26 s of the stubs 25 and 26, and the other ends 23 s and 24 s of the stubs 23 and 24 are connected to the transmission signal processing circuit 1.
2, an audio signal from the microphone 11 is supplied to the processing circuit 12. As shown in FIG. 3, in this embodiment, the stubs 23 to 26 are formed of strip conductors 23t formed on both upper and lower surfaces of a printed wiring board (substrate) 27 using an appropriate insulating material having a small high-frequency loss. , 23b ‥‥ 26t, 26b to form a Lecher wire (two parallel lines),
Are arranged perpendicular to the axial direction of the A pair of spacers 28 made of the same insulating material and having an appropriate height (the other is not shown for simplicity)
Are arranged on the substrate 27, and the conductor wires 21 and 22 are respectively supported in the space. Each conductor 2 of the λ / 4 stubs 23 to 26
As is well known, the mechanical length of 3t to 26b can be reduced as the dielectric constant of the substrate 27 increases. Although not shown, the conductors 23b to 23b formed on the lower surface of the substrate 27 are not shown.
The stubs 23 to 26 can be formed into a normal microstrip line type by enlarging the bottom surface 6b to the peripheral portion or the entire area of the lower surface to form a ground conductor. Further, the conductor wires 21 and 22 are not limited to the rod shape, and may be, for example, a thin plate shape. With the above-described configuration, the antenna 20 of this embodiment is capable of transmitting and receiving signals at each λ / 4 stub 23 in the transmission / reception frequency band.
26 through 26o are electrically opened to have no effect on the conductor wires 21 and 22.
The conductor strips 21 and 22 are equivalently a single large-diameter conductor 29 as shown in FIG. 4A, and as is well known, the Q as an antenna is reduced and the broadband characteristic is reduced. can get. In addition, the occupied space is smaller than in the case where the diameter of the single conductor of the antenna is mechanically increased, so that the antenna and the housing can be easily integrated. In the audio frequency band, each capacitor C
The impedance of 20 to C26 becomes infinite and does not have any effect on the audio signal from the microphone 11, and the conductor strips 21, 22 and the λ / 4 stubs 23 to 26 are, as shown in FIG. It is also used as an audio signal transmission line between the microphone 11 and the processing circuit 12. In the above-described embodiment, at the time of a call, as shown in FIG. 2, the sub-housing 3 is unfolded, and the transmitting / receiving antenna 20 housed inside the sub-housing 3 together with the microphone 11
The main housing 2 was separated from the main housing 2, but as shown in FIG.
Using a normal solid single case 1SL, this case 1SL
The telephone circuit 10 and the antenna 20 may be housed inside. Further, as shown in FIG. 6, the antenna 20 and the microphone 11 may be mounted on the outside of the housing 1 so that the antenna 20 can be turned upside down. In this case, the conductor wires 21 and 22 are
In order to obtain the required mechanical strength, for example, a small microphone as a metal structure is formed in a tubular shape at its microphone-side ends 21b and 22b via a holder 31 made of an appropriate low-loss insulating material. 11 is attached. The microphone 11 and the conductor wire 2
The ends 21b and 22b of the first and second 22 are defined as λ /
Instead of the four stubs, they are connected by appropriate RF chokes 32, 33, and the conductor wires 21, 22 and the microphone 11 are cut off at high frequency. As described above, according to the present invention, in a wireless telephone apparatus, a plurality of conductor wires each having a length of 1/4 of a transmission / reception wavelength are arranged in parallel and close to each other. The adjacent ends are connected via a capacitor having a predetermined capacity, and one end of a stub having a length of 1/4 of the transmission / reception wavelength is connected to each end of the plurality of conductor wires, and the other end of each stub is connected. Since the connection is made via a capacitor of a predetermined capacity, in the high frequency region, each end of the stub is open, and
Both ends of a plurality of conductor wires are short-circuited, equivalently to a single large-diameter conductor, an antenna with a wideband characteristic is formed while suppressing an increase in occupied space, and all capacitors are open in the audio frequency domain. In this state, the plurality of conductor wires can be used for transmitting a sound signal from the microphone.
【図面の簡単な説明】
【図１】この発明による無線電話装置の一実施例の電気
的構成のブロック図である。
【図２】この発明の一実施例の機械的構成を示す斜視図
である。
【図３】この発明の一実施例の要部の機械的構成を示す
斜視図である。
【図４】この発明の一実施例の動作を説明するための線
図である。
【図５】この発明の他の実施例の機械的構成を示す斜視
図である。
【図６】この発明の他の実施例の機械的構成を示す斜視
図である。
【符号の説明】
１０ 電話機回路
１１ マイクロホン
２０ アンテナ
２１，２２ 導体線条
２３〜２６ λ／４スタブ
Ｃ20〜Ｃ26 コンデンサBRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of an electric configuration of an embodiment of a wireless telephone device according to the present invention. FIG. 2 is a perspective view showing a mechanical configuration of one embodiment of the present invention. FIG. 3 is a perspective view showing a mechanical configuration of a main part of one embodiment of the present invention. FIG. 4 is a diagram for explaining the operation of one embodiment of the present invention. FIG. 5 is a perspective view showing a mechanical configuration of another embodiment of the present invention. FIG. 6 is a perspective view showing a mechanical configuration of another embodiment of the present invention. [Description of Signs] 10 Telephone circuit 11 Microphone 20 Antennas 21 and 22 Conductor strips 23 to 26 λ / 4 stub C20 to C26 Capacitor
フロントページの続き (56)参考文献 特開 昭52−94016（ＪＰ，Ａ) 特開 平４−343549（ＪＰ，Ａ) 特開 平２−261224（ＪＰ，Ａ) 特開 平２−257739（ＪＰ，Ａ) 特開 平１−198121（ＪＰ，Ａ) 特開 昭57−119501（ＪＰ，Ａ) 特開 昭52−44541（ＪＰ，Ａ) 実開 昭64−15441（ＪＰ，Ｕ) 実開 昭61−52840（ＪＰ，Ｕ) 特公 昭48−40642（ＪＰ，Ｂ１) (58)調査した分野(Int.Cl.7，ＤＢ名) H01Q 1/24 H01Q 1/27 H04Q 7/32 Continuation of the front page (56) References JP-A-52-94016 (JP, A) JP-A-4-343549 (JP, A) JP-A-2-261224 (JP, A) JP-A-2-257739 (JP) , A) JP-A-1-198121 (JP, A) JP-A-57-119501 (JP, A) JP-A-52-44541 (JP, A) Japanese Utility Model Application No. 64-15441 (JP, U) Japanese Utility Model Application 61-52840 (JP, U) JP 48-40642 (JP, B1) (58) Fields investigated (Int. Cl. 7 , DB name) H01Q 1/24 H01Q 1/27 H04Q 7/32
Claims (1)
／４の長さの複数の導体線条と、 前記複数の導体線条の一方および他方の端部のそれぞれ
において当該複数の導体線条の隣接する端部を互いに接
続して、前記複数の導体線条を前記送受信用のアンテナ
として使用するようにするための第１の所定容量の複数
個の第１のコンデンサと、 前記複数の導体線条の一方および他方の端部のそれぞれ
に一端が接続される、前記送受信波長の１／４の長さの
複数のスタブと、 前記複数のスタブのそれぞれの他端と接地との間に接続
され、音声周波数帯域では開放状態となるように選定さ
れた第２の所定容量の複数個の第２のコンデンサと、 複数の前記スタブを通じて前記複数の導体線条の他方の
端部に接続される送話用のマイクロホンと、 を備え、 前記複数の導体線条の一端側から送受信用のアンテナの
給電点が導出されると共に、前記送話用のマイクロホン
からの音声信号は、複数の前記スタブを通じて前記複数
の導体線条の他方の端部に供給され、さらに、前記複数
の導体線条の一端側に接続された複数の前記スタブを通
じて送信信号処理部に伝達されることを特徴とする無線
電話端末。(57) [Claims] [Claim 1] One of transmission and reception wavelengths arranged in parallel in close proximity
A plurality of conductor wires having a length of ４, and connecting the adjacent ends of the plurality of conductor wires to each other at one end and the other end of the plurality of conductor wires, respectively. A plurality of first capacitors having a first predetermined capacity for using a wire as the transmitting / receiving antenna, and one end connected to each of one and other ends of the plurality of conductor wires; A plurality of stubs each having a length of 1/4 of the transmission / reception wavelength, and connected between the other end of each of the plurality of stubs and ground, and selected to be open in an audio frequency band. A plurality of second capacitors having a second predetermined capacitance; and a microphone for transmission connected to the other end of the plurality of conductor wires through a plurality of the stubs. An antenna for sending and receiving from one end of the And the audio signal from the microphone for transmission is supplied to the other end of the plurality of conductor wires through the plurality of stubs, and further, A wireless telephone terminal transmitted to a transmission signal processing unit through a plurality of stubs connected to one end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2852593A JP3521928B2 (en) | 1993-01-25 | 1993-01-25 | Wireless telephone equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2852593A JP3521928B2 (en) | 1993-01-25 | 1993-01-25 | Wireless telephone equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06224610A JPH06224610A (en) | 1994-08-12 |
| JP3521928B2 true JP3521928B2 (en) | 2004-04-26 |
Family
ID=12251089
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2852593A Expired - Fee Related JP3521928B2 (en) | 1993-01-25 | 1993-01-25 | Wireless telephone equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3521928B2 (en) |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4840642B1 (en) * | 1969-07-28 | 1973-12-01 | ||
| JPS5244541A (en) * | 1975-10-06 | 1977-04-07 | Nippon Sheet Glass Co Ltd | Heat plate glass/high-band receiving antenna |
| JPS5294016A (en) * | 1976-02-03 | 1977-08-08 | Kuniaki Miyazawa | Wireless telephone set |
| JPS57119501A (en) * | 1981-01-17 | 1982-07-26 | Nippon Sheet Glass Co Ltd | Glass antenna |
| JPS645391Y2 (en) * | 1984-09-13 | 1989-02-10 | ||
| JPS6415441U (en) * | 1987-07-15 | 1989-01-26 | ||
| US5014346A (en) * | 1988-01-04 | 1991-05-07 | Motorola, Inc. | Rotatable contactless antenna coupler and antenna |
| US4847818A (en) * | 1988-10-31 | 1989-07-11 | Timex Corporation | Wristwatch radiotelephone |
| JPH02261224A (en) * | 1989-03-31 | 1990-10-24 | Mitsubishi Electric Corp | Portable radio equipment |
| JPH04343549A (en) * | 1991-05-20 | 1992-11-30 | New Japan Radio Co Ltd | Compact portable telephone set |
-
1993
- 1993-01-25 JP JP2852593A patent/JP3521928B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06224610A (en) | 1994-08-12 |
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