JPH06260949A - Radio equipment - Google Patents

Radio equipment

Info

Publication number
JPH06260949A
JPH06260949A JP5043055A JP4305593A JPH06260949A JP H06260949 A JPH06260949 A JP H06260949A JP 5043055 A JP5043055 A JP 5043055A JP 4305593 A JP4305593 A JP 4305593A JP H06260949 A JPH06260949 A JP H06260949A
Authority
JP
Japan
Prior art keywords
antenna
loop
board
circuit board
printed circuit
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.)
Granted
Application number
JP5043055A
Other languages
Japanese (ja)
Inventor
Tatsuo Miyoshi
達夫 三好
Original Assignee
Seiko Instr Inc
セイコー電子工業株式会社
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Seiko Instr Inc, セイコー電子工業株式会社 filed Critical Seiko Instr Inc
Priority to JP5043055A priority Critical patent/JPH06260949A/en
Publication of JPH06260949A publication Critical patent/JPH06260949A/en
Application status is Granted legal-status Critical

Links

Abstract

PURPOSE: To protect an electronic equipment from the static electricity and also prevent the undesired radiation in a limited space without deteriorating the antenna gain by using an antenna which doubles as a shielding case.
CONSTITUTION: A multilayer printed board 2 includes four layers where a 2nd layers is used as a circuit blocking ground 12 and a 3rd layer face antenna 13 respectively. Meanwhile the circuit elements 21 and 22 are provided on a 1st layer face and a 4th layer face respectively. Most of parts provided on one of both sides of the board 2 are covered by a U-shaped antenna doubling as a shielding case 1. The antenna 1, an antenna adjusting trimmer capacitor 3, and the inner layer antenna 13 are connected together in series and form an electrical loop. Then the ground 12 is connected to the antenna 13 at one of both ends of the board 2.
COPYRIGHT: (C)1994,JPO&Japio

Description

【発明の詳細な説明】 DETAILED DESCRIPTION OF THE INVENTION

【0001】 [0001]

【産業上の利用分野】本発明はアンテナ付き無線機器、 BACKGROUND OF THE INVENTION The present invention is a wireless device with antenna,
とくにループアンテナ付き無線機器に関する。 And more particularly to a wireless device with a loop antenna.

【0002】 [0002]

【従来の技術】従来のアンテナ付き無線機器において、 BACKGROUND OF THE INVENTION In wireless devices with conventional antenna,
アンテナの利得を大きくすることは、設計上でとても大切なものであった。 Possible to increase the gain of the antenna, were those very important on the design. 比較的高いアンテナの利得を得るためにはきょう体の外部にモノポールアンテナ等の突起アンテナを出すと良い。 Relatively to obtain a gain of high antenna may issue a projection antenna such as a monopole antenna on the outside of today body.

【0003】しかし、そのような無線機器における突起物は、携帯性を悪化させる原因となっていた。 [0003] However, the projections in such wireless devices, has been a cause of deterioration of the portability. 伸縮自在なアンテナを用いれば携帯性は向上するが、伸縮時通信ができないなどの課題があった。 Although improved portability With the retractable antenna has a problem of being unable stretch when communicating. 近年の携帯電話等によく利用されている逆F型アンテナは、携帯性および利得を確保できた特性の比較的良いアンテナである。 Inverted-F antenna that is often used in recent years such as a mobile phone, a relatively good antenna characteristics can be ensured portability and gain.

【0004】しかし、この逆F型アンテナにおいても欠点がある。 [0004] However, there is a drawback in this inverted F-type antenna. それは、電界型アンテナであるということである。 It is that it is a field-type antenna. 承知のとおり人体近傍における電波は、電界成分より、磁界成分のほうが高い。 Telecommunications the human body near as know, from the electric field components, more of the magnetic field component is high. よって、高いアンテナ利得を持つ電界型アンテナは、人体に密着、あるいは近づけることにより、利得は著しく低下する。 Therefore, the electric field-type antenna with high antenna gain, in close contact with the human body, or by approximating the gain is reduced significantly.

【0005】近年、究極の通信機器といわれていた腕時計型のものも世に出回るようになってきた。 [0005] In recent years, it has come to also hit the world those of the wristwatch type, which has been said to be the ultimate communication equipment. 腕時計型無線機器には、前記の理由によりアンテナにはループアンテナ等の磁界型アンテナを利用することが多い。 The wristwatch type radio equipment, by the reason the antenna has often utilizing a magnetic field type antenna such as a loop antenna. これは、名前の通りループ形状のアンテナであり、1波長で整合をとる全波長ループアンテナと、全波長にはほとんど至らない微小ループアンテナに大別できる。 This is as the antenna of a loop shape of the name, and full-wavelength loop antenna for matching at one wavelength can be divided into small loop antenna that does not lead almost all wavelengths. 微小ループアンテナは理論的に無指向性特性を示し、小型であり、腕時計型通信機器等においては多く用いられている。 Small loop antenna is shown theoretically omnidirectional characteristics, it is compact and is often used in the wristwatch type communication device or the like.

【0006】 [0006]

【発明が解決しようとする課題】しかし、承知の通り、 The object of the invention is to be Solved However, as aware,
微小ループアンテナのアンテナ利得は、ループの大きさ、つまり開口面積と、ループアンテナの幅により決定され、それらが大きい方がよい。 Antenna gain of the small loop antenna, the size of the loop, i.e. the opening area is determined by the width of the loop antenna, the better they are large.

【0007】ところが無線機器が小型になるにつれ、部品は高密度実装され、アンテナの得る場所は限られてしまった。 [0007] However, as the wireless device is small, the component is high-density packaging, where you get the antenna had been limited. また、ループアンテナの磁束を切る方向にクリスタルやSAWフィルタなどの大物部品があると、磁束の妨げになり、結果的にアンテナ利得の低下を招く。 Further, when the direction to cut the flux of the loop antenna has large parts, such as crystals and SAW filter, it can interfere the magnetic flux, resulting in lowering the antenna gain. さらに、多くの通信機器においては、静電気などの外的要因によっての破壊や誤動作の防止、および、内部で発生された不要な電波を発生防止のためのシールド遮蔽を施しているのが常であり、アンテナ利得の低下は小型機器になるほど顕著に現れていた。 Furthermore, in many communications devices, prevention of destruction or malfunction of the external factors such as static electricity, and, that is subjected to shielding shielding for generating prevent unnecessary radio waves generated inside be normal , reduction of the antenna gain was not appear more conspicuously in small equipment.

【0008】このように限られたスペースにおいて、特性を悪化させないような無線機器の開発上が望まれていた。 [0008] In a limited space in this way, on the development of wireless devices, such as not to deteriorate the characteristics it has been desired.

【0009】 [0009]

【課題を解決するための手段】ループアンテナを用いる無線機器において、電子回路を配線するプリント基板に多層基板をもちい、電子回路を囲むようにコの字型の帯状のシールドケースをかぶせ、前記シールドケースをプリント基板と接続し、多層基板の内層の1つ以上の層と、前記シールドケースを、コンデンサを介して接続してループを構成し、そのループ上に、無線回路の高周波回路を接続した。 In the wireless equipment using the loop antenna SUMMARY OF THE INVENTION, using a multi-layer substrate on a printed circuit board for wiring electronic circuits, covered with a U-shaped strip of the shield case of so as to surround the electronic circuit, the shield connect the case and printed circuit board, and one or more layers of the inner layer of the multilayer substrate, the shielding case, to form a loop connected via a capacitor, on the loop, to connect the high frequency circuit of the wireless circuit .

【0010】 [0010]

【作用】これらの構成により、専用のシールドケースがアンテナとしても機能し、従来のループアンテナ付き無線機器のように、シールドケースによりループアンテナの磁束が遮断されることは皆無となり、また、機器内部を最大有効したループアンテナとなるため、利得の高いアンテナを実現できる。 [Action] These arrangements also functions as a dedicated shield case antenna, as in the conventional loop antenna with a wireless device, the magnetic flux of the loop antenna is blocked by the shield case becomes nil, also inside the device the order becomes maximum effective the loop antenna can be realized with a high gain antenna.

【0011】また、内部の高周波回路のグランドとアンテナが多層基板内で分離されているため、高周波電流が高周波回路へ回り込むことも未然に防ぐことが可能である。 Further, since the ground and the antenna of the internal high-frequency circuit are separated in a multilayer substrate, it is possible to prevent the high-frequency current flows around the high-frequency circuit. このように、機器内部に最大利得を得て、また、シールド効果をも発揮するシールドケース型アンテナを実現できる。 Thus, to obtain a maximum gain in the internal devices, it can be realized shield case type antenna which also exert a shielding effect.

【0012】 [0012]

【実施例】つぎに本発明の実施例を図面に基づき説明する。 EXAMPLES Next an embodiment of the present invention will be described with reference to the drawings. 図1に、本発明の斜視図の一例を示す。 Figure 1 shows an example of a perspective view of the present invention. 1はシールドケース兼用アンテナ、2は多層プリント基板、3はアンテナ調整用トリマコンデンサ、21は回路素子である。 1 shield case shared antenna, 2 is a multilayer printed circuit board, the antenna adjustment trimmer capacitor 3, 21 is a circuit element.

【0013】多層プリント基板2は、実施例においては4層基板を示す。 [0013] multilayer printed board 2 shows a four-layer board in the embodiment. シールドケース兼用アンテナは、プリント基板上の静電破壊や不要輻射を減少させるように、 The shield case combined antenna, so as to reduce the electrostatic breakdown or unnecessary radiation on the printed circuit board,
関連のある回路ブロックを遮蔽する。 Shielding the relevant circuit blocks. 実施例においては、プリント基板2の片面(斜視図上面)のほとんどの部品をコの字型のアンテナ兼用シールドケースにおいて遮蔽する。 In embodiments, shields in most parts of the U-shaped antenna shared shield case one side of the printed circuit board 2 (perspective view Top). シールドケースの材質は、鉄や銅に、高周波特性のよい金やニッケル等によりメッキ処理される。 The material of the shield case, the iron or copper, is plated processed by good gold, nickel or the like having high-frequency characteristics.

【0014】図2に本発明のアンテナに関する接続図を示す。 [0014] shows a connection diagram for the antenna of the present invention in FIG. 1はシールド兼用アンテナ、3はアンテナ調整用トリマコンデンサ、12は回路ブロック用グランド、1 1 shield the antenna with three antenna adjustment trimmer capacitor, 12 is a ground circuit block, 1
3はプリント基板に施された内層アンテナ、20はアンテナを除く回路ブロックである。 3 inner antenna applied to the printed circuit board, 20 is a circuit block, except the antenna.

【0015】実施例においては、回路ブロック用グランド12は第2層を用いている。 [0015] In embodiments, the ground 12 for the circuit block uses a second layer. また、内層アンテナ13 In addition, the inner layer antenna 13
は、実施例においては第3層を用いている。 It uses a third layer in the examples. アンテナ調整用トリマコンデンサ3は、アンテナの共振周波数をあわせるためのものである。 Antenna adjustment trimmer capacitor 3 is for adjusting the resonance frequency of the antenna. 実施例においては3pFの可変容量をもつ。 In the embodiment having the variable capacitor 3 pF.

【0016】回路ブロック用GNDと内層アンテナは、 [0016] The circuit block for GND and the inner layer antenna,
プリント基板2の一端において接続される。 It is connected at one end of the printed circuit board 2. この理由は、もしも内層アンテナと回路のグランドの電位が同等となると、ループアンテナの高周波電流が、回路ブロック内の高周波部分へ流れ、異常発振、または不安定な動作となるためである。 The reason is that when if the same is ground potential of the inner antenna and circuit, loop antennas high frequency current flows into the high frequency part of the circuit blocks, is because the abnormal oscillation or unstable operation.

【0017】つぎに本発明の断面図を図3に示す。 The following is a sectional view of the present invention in FIG. 1はシールド兼用ループアンテナ、2はプリント基板、3はアンテナ調整用トリマコンデンサ、11はプリント基板の1層面、12はプリント基板の2層面、13はプリント基板の3層面、14はプリント基板の4層面である。 1 Shield combined loop antenna, 2 is a printed circuit board, the antenna adjustment trimmer capacitor 3, 11 1-layer surface of the printed circuit board, 12 two-layer surface of the printed circuit board, 13 is a three-layer surface of the printed circuit board, 14 is a printed circuit board 4 it is a layer surface.
21は1層面における回路素子、22は4層面における回路素子、30はスルーホールを示す。 Circuit element in one layer surface 21, the circuit elements in the four-layer surface 22, 30 denotes a through hole.

【0018】実施例においては、2層面12を回路ブロックのグランド、3層面13を内層アンテナとして利用している。 [0018] In embodiments, a two-layer surface 12 of the circuit block ground utilizes a three-layer surface 13 as an inner antenna. そして、シールドケース兼用アンテナ1と、 Then, the shield case also serves as the antenna 1,
アンテナ調整用トリマコンデンサ3と、プリント基板3 An antenna adjusting trimmer capacitor 3, the printed circuit board 3
層面の内層アンテナとは直列に接続されて電気的にループを描き、実施例においての共振周波数は430MHz The inner antenna layer surface are connected in series to draw the electrical loop, the resonance frequency of the embodiment 430MHz
である。 It is.

【0019】そして、回路ブロックの高周波入出力部分の信号端子とグランド端子がそれぞれ、プリント基板3 [0019] Then, each of the signal terminal of the high-frequency input and output portions of the circuit block and the ground terminal, the printed circuit board 3
層面にある内層アンテナの特性インピーダンスが50オームとなる2点に、それぞれスルーホールを介して接続され、シールドアンテナ型ループアンテナが構成される。 The two points characteristic impedance of the inner antenna in the layer surface is 50 ohms, are connected via the through holes, shielding the antenna loop antenna is constituted.

【0020】 [0020]

【発明の効果】このように本発明を用いることにより、 Effect of the Invention] By using the present invention as described above,
従来の欠点であったさまざまな問題点を克服することが可能である。 It is possible to overcome the various problems were conventional drawbacks. 以下にそれを示す。 Show it below. 従来の無線機器のようにシールドケースがループアンテナの磁束を遮断し、結果的にループアンテナの利得を著しく低下させようなことは皆無となる。 Shield case blocks the magnetic flux of the loop antenna as in the conventional radio equipment, resulting in that as significantly reduce the gain of the loop antenna becomes nil.

【0021】また、機器内部の空間を無駄なく有効利用したアンテナを実現できるため、極めて高利得なアンテナが実現可能である。 Further, since it is possible to realize an antenna which is effectively utilized without waste space inside the apparatus, a very high gain antenna can be realized. また、アンテナ利得を劣化させることなく、静電気に対する保護、および不要な輻射を防止する遮蔽が同時おこなえる。 Furthermore, without deteriorating the antenna gain, protection against static electricity, and perform simultaneous shielding to prevent unwanted radiation.

【0022】さらにアンテナとシールドケースが一体となされるために軽量化をはかることが可能である。 [0022] In addition antenna and the shield case it is possible to reduce the weight in order to be made To integrally. このように、本発明の効果は、機器が小型になるにつれ高くなり、腕時計型無線機器などにとっては極めて効果的である。 Thus, the effect of the present invention, apparatus is increased as it goes smaller, it is extremely effective for such wristwatch type radio equipment.

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS

【図1】本発明の斜視図の一例 An example of a perspective view of the present invention; FIG

【図2】本発明のアンテナに関する接続図 Connection diagram for the antenna of the present invention; FIG

【図3】本発明の断面図 Sectional view of the present invention; FIG

【図4】従来の無線機器の斜視図の一例 [4] An example of a perspective view of a conventional wireless device

【図5】従来の無線機器の断面図の一例 [5] An example of a cross-sectional view of a conventional wireless device

【符号の説明】 DESCRIPTION OF SYMBOLS

1 シールドケース兼用アンテナ 2 多層プリント基板 3 アンテナ調整用トリマコンデンサ 4 従来のアンテナ 5 従来のシールドケース 6 従来のプリント基板 11 プリント基板の1層面 12 回路ブロック用グランド 13 プリント基板に施された内層アンテナ 14 プリント基板の4層面 20 アンテナを除く回路ブロック 21 1層面における回路素子 22 4層面における回路素子 30 スルーホール 1 the shield case antenna with 2 multilayer printed board 3 Antenna adjustment trimmer capacitor 4 conventional antenna 5 conventional shield case 6 conventional printed board 11 printed board one layer surface 12 circuit block ground 13 printed circuit board decorated with inner antenna 14 circuit elements 30 through holes in the circuit element 22 four-layered surface of the circuit blocks 21 1-layer surface except for the 4-layer surface 20 antenna printed circuit board

Claims (1)

    【特許請求の範囲】 [The claims]
  1. 【請求項1】 ループアンテナを用いる無線機器において、電子回路を配線するプリント基板に多層基板をもちい、前記無線機器の電子回路を囲むようにコの字型の帯状のシールドケースをかぶせ、前記シールドケースをプリント基板と接続し、多層基板の内層の1つ以上の層と、前記シールドケースとをコンデンサを介して接続してループを構成し、そのループ上に、無線回路の高周波回路を接続した無線機器。 1. A wireless device using a loop antenna, using a multi-layer substrate on a printed circuit board for wiring electronic circuits, covered with a U-shaped strip of the shield case of so as to surround the electronic circuit of the wireless device, said shield connect the case and printed circuit board, and one or more layers of the inner layer of the multilayer substrate, wherein the shield case are connected via a capacitor to form a loop, on the loop, to connect the high frequency circuit of the wireless circuit radio equipment.
JP5043055A 1993-03-03 1993-03-03 Radio equipment Granted JPH06260949A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5043055A JPH06260949A (en) 1993-03-03 1993-03-03 Radio equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5043055A JPH06260949A (en) 1993-03-03 1993-03-03 Radio equipment

Publications (1)

Publication Number Publication Date
JPH06260949A true JPH06260949A (en) 1994-09-16

Family

ID=12653198

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5043055A Granted JPH06260949A (en) 1993-03-03 1993-03-03 Radio equipment

Country Status (1)

Country Link
JP (1) JPH06260949A (en)

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