JPH0955596A - Small and convenient anechoic chamber - Google Patents
Small and convenient anechoic chamberInfo
- Publication number
- JPH0955596A JPH0955596A JP7235893A JP23589395A JPH0955596A JP H0955596 A JPH0955596 A JP H0955596A JP 7235893 A JP7235893 A JP 7235893A JP 23589395 A JP23589395 A JP 23589395A JP H0955596 A JPH0955596 A JP H0955596A
- Authority
- JP
- Japan
- Prior art keywords
- small
- antenna
- space
- electromagnetic field
- small mobile
- 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.)
- Pending
Links
Landscapes
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
Abstract
Description
【産業上の利用分野】本発明は、パーソナルハンディホ
ーンなどの小型移動無線機器が送信された電磁界レベル
に対する受信感度の測定、指向性測定に関わる送信電磁
界を発生する環境を簡易につくる装置である。小型移動
無線機器のアンテナ受信感度、指向性などの試験が容易
に、安価に行うことができる。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for easily creating an environment for generating a transmission electromagnetic field related to the measurement of the receiving sensitivity to the electromagnetic field level transmitted by a small mobile radio device such as a personal handy horn and the directivity measurement. Is. It is possible to easily and inexpensively test the antenna reception sensitivity and directivity of a small mobile radio device.
【従来の技術】小型移動無線機器のアンテナ並びに電磁
波に関わる受信試験を行う場合、他の電子機器に妨害を
与えないように電磁界をを発生させるための手法として
は、電波暗室、あるいはＴＥＭセルなどが使用されてい
る。電波暗室やＴＥＭセルは、非常に高価であるととも
に広い占有面積が要求される。加えて、電波暗室は移動
することができないため固定した場所でしか測定ができ
ないのが現状である。2. Description of the Related Art In a reception test relating to an antenna and an electromagnetic wave of a small mobile radio device, an anechoic chamber or a TEM cell is used as a method for generating an electromagnetic field so as not to interfere with other electronic devices. Are used. The anechoic chamber and the TEM cell are very expensive and require a large occupied area. In addition, since the anechoic chamber cannot move, it is the current situation that measurements can be made only at fixed locations.
【発明が解決しようとする課題】小型移動無線機器に関
わる受信試験を行う場合に、従来、電波暗室やＴＥＭセ
ルを使用していた。電波暗室やＴＥＭセルは、設備費が
大変高価であり、設置スベースも広くとらねばならな
い。また、電波暗室は据えつけ設備であるため、測定場
所が限定されてしまうのが現状である。上記問題を解決
するため本発明は、小型で安価、且つ可搬型である電磁
界発生装置を提供するものである。Conventionally, an anechoic chamber or a TEM cell has been used to perform a reception test for a small mobile radio device. Anechoic chambers and TEM cells are very expensive in terms of equipment costs, and their installation space must be wide. In addition, since the anechoic chamber is a fixed facility, the measurement location is limited at present. In order to solve the above problems, the present invention provides a compact, inexpensive and portable electromagnetic field generator.
【課題を解決するための手段】小型の金属箱の内壁六面
に所要周波数領域の電波吸収体を貼り、その内部に、小
型移動無線機器を設置する空間と、該空間に電磁界を発
生させるためのアンテナを有する装置である。該アンテ
ナに所要周波数の信号電力を送り、内部空間に電磁界を
発生させる。アンテナより送信された電磁波のうち、内
壁にあたったものは電波吸収体により吸収されてしま
い、反射して内部空間に戻ることはない。このため、内
部空間には壁面よりの反射波を含まないアンテナより送
信された均一な電磁界を発生させることができる。[MEANS FOR SOLVING THE PROBLEMS] An electromagnetic wave absorber in a required frequency range is attached to six inner walls of a small metal box, and a space for installing a small mobile radio device therein and an electromagnetic field are generated in the space. A device having an antenna for. Signal power of a required frequency is sent to the antenna to generate an electromagnetic field in the internal space. Of the electromagnetic waves transmitted from the antenna, the electromagnetic waves that hit the inner wall are absorbed by the electromagnetic wave absorber and do not return to the internal space by being reflected. For this reason, it is possible to generate a uniform electromagnetic field transmitted from the antenna that does not include reflected waves from the wall surface in the internal space.
【実施の形態】[Embodiment]
【実施例】図１は本発明の実施例に関わる構成を示す図
である。１は小型の可搬形の金属箱である。蝶番等によ
り蓋が開閉できる構造にしている。２は金属箱の内壁に
貼られた電波吸収体である。３は小型移動無線機器を設
置する内部空間である。４は外部の信号発生器から伝送
された信号電力を前記内部空間に電磁界をつくるアンテ
ナである。５は前記アンテナに信号を伝送するためのコ
ネクタである。６は監視カメラ、７はマイクロホンでそ
れぞれ小型移動無線機器の動作状態を監視する。小型移
動無線機器への送信信号となるべき信号を外部の信号発
生器でつくり、これをコネクタ５を経由して、小型金属
箱内のアンテナ４に伝送し、アンテナ４により内部空間
３に前記信号発生器の信号の電磁界が形成される。内部
空間３には小型移動無線機器が置かれ、これに前記電磁
界が印加される。内部空間３には均一な電磁界の発生を
阻害しない様な配置と大きさを配慮した小型カメラや、
小型マイクロホンを設置し、小型移動無線機の動作状態
を監視し、該小型移動無線機の受信感度、指向性などの
試験を行うことができる。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a diagram showing a configuration relating to an embodiment of the present invention. 1 is a small portable metal box. The structure is such that the lid can be opened and closed with hinges. Reference numeral 2 is a radio wave absorber attached to the inner wall of the metal box. Reference numeral 3 is an internal space in which a small mobile wireless device is installed. Reference numeral 4 is an antenna that creates an electromagnetic field in the internal space of signal power transmitted from an external signal generator. Reference numeral 5 is a connector for transmitting a signal to the antenna. Reference numeral 6 is a monitoring camera, and 7 is a microphone for monitoring the operating state of the small mobile wireless device. A signal to be a transmission signal to the small mobile radio device is generated by an external signal generator, and this signal is transmitted to the antenna 4 in the small metal box via the connector 5, and the signal is transmitted to the internal space 3 by the antenna 4. An electromagnetic field of the signal of the generator is formed. A small mobile wireless device is placed in the internal space 3, and the electromagnetic field is applied to the small mobile wireless device. A small camera that considers the layout and size so as not to disturb the generation of a uniform electromagnetic field in the internal space 3,
It is possible to install a small microphone, monitor the operation state of the small mobile wireless device, and perform a test such as the receiving sensitivity and directivity of the small mobile wireless device.
【発明の効果】小型移動無線機器の受信感度、指向性な
どの試験が容易に、安価に行うことができる。且つ、試
験場所を固定することなく、どこでも安易に持ち運んで
試験することができる。加えて、発生させた電磁界は、
箱内に封じ込められているので外部に置かれた電子機器
に対して電磁波妨害になることはない。また、小型の箱
に電磁界を形成するため、伝送する信号電力は、電波暗
室などに比べ低レベルで済ますことができる。小型移動
無線機器のメンテナンスを行う場合、メンテナンスを行
う地点を全国的に広範囲な地域に置く必要があり、本発
明の低価格性、可搬性が適している。As described above, the receiving sensitivity and directivity of a small mobile radio device can be easily tested at low cost. Moreover, it is possible to carry and test easily anywhere without fixing the test place. In addition, the generated electromagnetic field is
Since it is enclosed in the box, it does not interfere with electronic equipment placed outside. Also, since the electromagnetic field is formed in a small box, the signal power to be transmitted can be at a lower level than in an anechoic chamber. When performing maintenance on a small mobile wireless device, it is necessary to place maintenance points in a wide area nationwide, and the low cost and portability of the present invention are suitable.
【図１】本発明の１実施例の構成を示す図FIG. 1 is a diagram showing the configuration of an embodiment of the present invention.
１ 可搬形の金属箱 ２ 電波吸収体 ３ 小型移動無線機器を設置する内部空間 ４ アンテナ ５ アンテナへの信号伝送コネクタ ６ 監視カメラ ７ マイクロホン 1 Portable metal box 2 Radio wave absorber 3 Internal space for installing small mobile radio equipment 4 Antenna 5 Signal transmission connector to antenna 6 Surveillance camera 7 Microphone
Claims (1)
を反射せずに吸収する電波吸収体を貼り、その内部に小
型移動無線機器を設置する空間を設け、該空間に外部よ
り電磁波を送信して均一な電磁界を発生させるためのア
ンテナを有することを特徴とする、簡易小型電波無響
箱。1. A small portable metal box is provided with an electromagnetic wave absorber that absorbs electromagnetic waves without reflecting on the six inner walls, and a space for installing a small mobile wireless device is provided inside the electromagnetic wave absorber from the outside. A simple small radio wave anechoic box characterized by having an antenna for transmitting a magnetic field to generate a uniform electromagnetic field.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7235893A JPH0955596A (en) | 1995-08-10 | 1995-08-10 | Small and convenient anechoic chamber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7235893A JPH0955596A (en) | 1995-08-10 | 1995-08-10 | Small and convenient anechoic chamber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0955596A true JPH0955596A (en) | 1997-02-25 |
Family
ID=16992810
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7235893A Pending JPH0955596A (en) | 1995-08-10 | 1995-08-10 | Small and convenient anechoic chamber |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0955596A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100448645B1 (en) * | 2001-12-24 | 2004-09-13 | 에버테크노 주식회사 | Shield Box for Use in Testing Mobile Phone |
| KR100589475B1 (en) * | 2004-07-12 | 2006-06-14 | 윌 테크놀로지(주) | Performance Test Method and Apparatus of Hand_phone for CDMA, PCS and GSM type |
| JP2010019690A (en) * | 2008-07-10 | 2010-01-28 | Denso Corp | Electromagnetic anechoic box |
| JP2021039050A (en) * | 2019-09-05 | 2021-03-11 | アンリツ株式会社 | Radio wave anechoic box, measurement device, and monitoring method of posture of object under test |
-
1995
- 1995-08-10 JP JP7235893A patent/JPH0955596A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100448645B1 (en) * | 2001-12-24 | 2004-09-13 | 에버테크노 주식회사 | Shield Box for Use in Testing Mobile Phone |
| KR100589475B1 (en) * | 2004-07-12 | 2006-06-14 | 윌 테크놀로지(주) | Performance Test Method and Apparatus of Hand_phone for CDMA, PCS and GSM type |
| JP2010019690A (en) * | 2008-07-10 | 2010-01-28 | Denso Corp | Electromagnetic anechoic box |
| JP2021039050A (en) * | 2019-09-05 | 2021-03-11 | アンリツ株式会社 | Radio wave anechoic box, measurement device, and monitoring method of posture of object under test |
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