JPH0436455Y2 - - Google Patents
Info
- Publication number
- JPH0436455Y2 JPH0436455Y2 JP1984105846U JP10584684U JPH0436455Y2 JP H0436455 Y2 JPH0436455 Y2 JP H0436455Y2 JP 1984105846 U JP1984105846 U JP 1984105846U JP 10584684 U JP10584684 U JP 10584684U JP H0436455 Y2 JPH0436455 Y2 JP H0436455Y2
- Authority
- JP
- Japan
- Prior art keywords
- receiving antenna
- field strength
- electric field
- output terminal
- transmitter
- 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
Links
Landscapes
- Monitoring And Testing Of Transmission In General (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Description
【考案の詳細な説明】 〔産業上の利用分野〕 本考案は電界強度簡易測定装置に関する。[Detailed explanation of the idea] [Industrial application field] The present invention relates to a simple electric field strength measuring device.
従来、３メートル〜30メートル程度の電界強度
の測定は屋外で行なつていた。
Conventionally, measurements of electric field strength at a distance of about 3 meters to 30 meters have been carried out outdoors.
第１図は従来例に係る電界強度測定装置（方
法）を示すものである。 FIG. 1 shows a conventional electric field strength measuring device (method).
図において１は受信アンテナであり、保持台３
に取り付けられた送信機２からの電波を受信す
る。 In the figure, 1 is the receiving antenna, and the holding stand 3
receives radio waves from a transmitter 2 attached to the transmitter 2.
４はこの受信アンテナにケーブルを介して接続
された電界強度計であり、送信機２の電界強度を
測定する。 Reference numeral 4 denotes an electric field strength meter connected to this receiving antenna via a cable, and measures the electric field strength of the transmitter 2.
従来はこの様に受信アンテナ１、保持台３に保
持された送信機２を共に屋外に設置して電界強度
を測定していた。 Conventionally, the receiving antenna 1 and the transmitter 2 held on the holding stand 3 were both installed outdoors to measure the electric field strength.
そのため例えば30メートル測定の際は30メート
ルという広い測定場所が必要となる。 Therefore, for example, when measuring 30 meters, a measurement location as wide as 30 meters is required.
従つて周囲の建造物による影響を常に考慮しな
ければならず、また天候にも左右されるという欠
点があつた。 Therefore, the influence of surrounding buildings must always be considered, and it also has the disadvantage of being affected by the weather.
本考案の目的は、上記従来技術の欠点を除き、
従来屋外で行なつていた３メートルや30メートル
の電界強度の測定で屋内で、簡易に、しかも再現
性良く実施する為の電界強度簡易測定装置を提供
するにある。
The purpose of the present invention is to eliminate the drawbacks of the above-mentioned prior art,
To provide a simple electric field strength measuring device for easily and reproducibly measuring electric field strength indoors at a distance of 3 meters or 30 meters, which has conventionally been carried out outdoors.
〔考案の概要〕
この目的を達成するために、本考案は、内面に
電波吸収板を設け、且つ外面にシールドとを施し
た測定箱内に送信機を設けると共に略1/2波長の
距離をおいて受信用アンテナを設け、この受信用
アンテナはその出力端子より屈曲させるとともに
発振周波数の略1/4波長の長さを持ち、出力端子
の一端が接地されて1/4波長接地アンテナとして
構成してあり、前記受信用アンテナと外部の電界
強度計を受信用アンテナの出力端子で接続してな
ることを特徴とする。[Summary of the invention] In order to achieve this purpose, the present invention provides a transmitter in a measurement box with a radio wave absorbing plate on the inside and a shield on the outside, and a transmitter is installed at a distance of approximately 1/2 wavelength. A receiving antenna is provided at the output terminal, and this receiving antenna is bent from its output terminal and has a length of approximately 1/4 wavelength of the oscillation frequency, and one end of the output terminal is grounded to form a 1/4 wavelength grounded antenna. The receiving antenna is connected to an external field strength meter through an output terminal of the receiving antenna.
以下、本考案の実施例を図面について説明す
る。
Embodiments of the present invention will be described below with reference to the drawings.
尚、従来例と同一個所は同一符号とする。 Note that the same parts as in the conventional example are given the same reference numerals.
第２図は本考案の一実施例に係る電界強度簡易
測定装置の要部のそ断面した全体図である。 FIG. 2 is an overall cross-sectional view of essential parts of a simple electric field strength measuring device according to an embodiment of the present invention.
本考案では受信用アンテナ１と送信機２をセツ
テングする台３を測定箱８（図中破線で示され
る）内に設けられている。 In the present invention, a stand 3 for setting up a receiving antenna 1 and a transmitter 2 is provided in a measuring box 8 (indicated by a broken line in the figure).
測定箱８は電波の不要な反射を抑えるため、電
波吸収板５を全域に亘つて内張りし、また外側を
金属板、プリント基板等のシールド板６で被覆し
ている。また受信用アンテナの出力を外部に導び
く出力端子７が設けてある。 In order to suppress unnecessary reflection of radio waves, the measurement box 8 is lined with a radio wave absorbing plate 5 over the entire area, and the outside is covered with a shield plate 6 such as a metal plate or a printed circuit board. Further, an output terminal 7 is provided for guiding the output of the receiving antenna to the outside.
そしてこの出力端子７は外部の電界強度計４と
接続されている。 This output terminal 7 is connected to an external electric field strength meter 4.
尚、電界強度計自体は公知のものであるから、
内部構造については説明を省略する。 Furthermore, since the electric field strength meter itself is well known,
Description of the internal structure will be omitted.
受信用アンテナ１の長さはλ／２（１／４波長）と
し、また受信用アンテナ１と送信機２との距離は
λ／２（１／２波長）で設定すると受信効率が最大とな
る。 The reception efficiency is maximized when the length of the receiving antenna 1 is set to λ/2 (1/4 wavelength) and the distance between the receiving antenna 1 and the transmitter 2 is set to λ/2 (1/2 wavelength). .
この様に電界強度を測定される送信機２をセツ
テング台３に固定して送信し、これを受信用アン
テナ１で受信し、出力端子７を通して電界強度計
４に継ぎ、これによつて電界強度を測定する。 The transmitter 2, whose electric field strength is to be measured in this way, is fixed to the setting table 3 and transmitted, received by the receiving antenna 1, connected to the electric field strength meter 4 through the output terminal 7, and thereby the electric field strength is measured. Measure.
次に第３図に示す説明図に基づき電界強度測定
原理を説明する。 Next, the principle of electric field strength measurement will be explained based on the explanatory diagram shown in FIG.
尚、図においてＡはλ／４接地アンテナの電圧分
布、Ｂは同、電流分布、Ｃは送信波電流分布を示
す。 In the figure, A shows the voltage distribution of the λ/4 grounded antenna, B shows the current distribution, and C shows the transmission wave current distribution.
電界強度計４に接続される誘起点４ａ，４ｂを
λ／４長の受信用アンテナ１のアーム端に持つλ／４接
地アンテナにおいて誘起点４ａ，４ｂに送信波に
よる電流を誘起し、これを電界強度計４で測定す
る。 In a λ/4 grounded antenna having induction points 4a and 4b connected to the electric field strength meter 4 at the arm end of the receiving antenna 1 having a length of λ/4, a current is induced by the transmitted wave at the induction points 4a and 4b, and this is Measure with electric field strength meter 4.
受信用アンテナ１と送信機２の距離は受信用ア
ンテナに電流のピークを誘起するλ／２を目安に電
界強度の最大点に設置するとバラツキも少なくフ
イールド測定との相関もとれる。 If the distance between the receiving antenna 1 and the transmitter 2 is set at the point of maximum electric field strength using λ/2, which induces a current peak in the receiving antenna, as a guide, there will be less variation and correlation with field measurements can be obtained.
以上説明したように、本考案によれば、一端接
地の１４波長で、従来の１／２波長と同等の電圧、
電流が誘起するので、互換性を保つて、測定箱を
小さくすることができ、また、測定箱内面が電波
吸収板で被われているため、反射が少なく、直接
波入力となるので受信送信間の距離が狭くても従
来のフイールド試験と相関がとれる。また外装の
シールドにより近くの金属物や人体の影響が少な
く、設置場所を自由に選べ、さらに室内測定なの
で時、天候を選ばないものであり、上記従来技術
の欠点を除いて優れた機能の電界強度簡易測定装
置を提供することができる。
As explained above, according to the present invention, the same voltage and current as the conventional 1/2 wavelength are induced at 14 wavelengths with one end grounded, so compatibility can be maintained and the measurement box can be made smaller. In addition, since the inner surface of the measurement box is covered with a radio wave absorbing plate, there is little reflection and direct wave input is achieved, so even if the distance between reception and transmission is narrow, correlation with conventional field tests can be obtained. In addition, the external shield reduces the influence of nearby metal objects and the human body, allowing you to freely choose the installation location, and since it is an indoor measurement, it does not depend on the time or weather. A simple strength measuring device can be provided.
第１図は従来例に係る電界強度簡易測定装置を
示す図、第２図は本考案の一実施例に係る電界強
度簡易測定装置の一部を断面した全体図、第３図
は本考案による電界強度測定の原理を示す図であ
る。
１……受信用アンテナ、２……送信機、４……
電界強度計、５……電波吸収板、６……シールド
板、７……出力端子、８……測定箱。
Fig. 1 is a diagram showing a simple electric field strength measuring device according to a conventional example, Fig. 2 is an overall partially sectional view of a simple electric field strength measuring device according to an embodiment of the present invention, and Fig. 3 is a diagram showing a simple electric field strength measuring device according to an embodiment of the present invention. FIG. 3 is a diagram showing the principle of electric field strength measurement. 1... Receiving antenna, 2... Transmitter, 4...
Electric field strength meter, 5... Radio wave absorption plate, 6... Shield plate, 7... Output terminal, 8... Measurement box.
Claims (1)
とを施した測定箱内に送信機を設けると共に略1/
２波長の距離をおいて受信用アンテナを設け、こ
の受信用アンテナはその出力端子より屈曲させる
とともに発振周波数の略1/4波長の長さを持ち、
出力端子の一端が接地されて1/4波長接地アンテ
ナとして構成してあり、前記受信用アンテナと外
部の電界強度計を受信用アンテナの出力端子で接
続してなることを特徴とする電界強度簡易測定装
置。 A transmitter is installed inside the measurement box, which has a radio wave absorbing plate on the inside and a shield on the outside.
A receiving antenna is provided at a distance of two wavelengths, and this receiving antenna is bent from its output terminal and has a length of approximately 1/4 wavelength of the oscillation frequency.
One end of the output terminal is grounded to form a 1/4 wavelength grounded antenna, and the receiving antenna and an external field strength meter are connected at the output terminal of the receiving antenna. measuring device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10584684U JPS6121979U (en) | 1984-07-14 | 1984-07-14 | Electric field strength simple measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10584684U JPS6121979U (en) | 1984-07-14 | 1984-07-14 | Electric field strength simple measuring device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6121979U JPS6121979U (en) | 1986-02-08 |
| JPH0436455Y2 true JPH0436455Y2 (en) | 1992-08-27 |
Family
ID=30665151
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10584684U Granted JPS6121979U (en) | 1984-07-14 | 1984-07-14 | Electric field strength simple measuring device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6121979U (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7403713B1 (en) * | 2022-08-29 | 2023-12-22 | 三菱電機株式会社 | Electromagnetic wave detection device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2733015A1 (en) * | 1977-04-01 | 1978-10-12 | Plessey Inc | ELECTROMAGNETIC TEST ARRANGEMENT, IN PARTICULAR ANTENNA TEST FIELD |
-
1984
- 1984-07-14 JP JP10584684U patent/JPS6121979U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6121979U (en) | 1986-02-08 |
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