M443990 五、新型說明： 【新型所屬之技術領域】 [0001] 本創作涉及一種阻抗穩定裝置及具有該阻抗穩定裝置的 電子或電氣設備。 【先前技術】 [0002] 通常，電子或電氣產品在出廠前均需要進行各種性能測 試以檢驗其是否合格，輻射場強測試就是這些測試中之 . 一，其用以測量電子或電氣產品的輻射場強是否在規定 範圍内。 [0003] 現將參考圖1描述現有技術中對電子或電氣產品的輻射（ 騷擾）場強進行測量的示意性方框圖。如圖1所示，電子 或電氣產品（即，待測設備（EUT) 1 )通過其AC電源線 直接插到普通的AC電源插座2 (其阻抗未知）以與AC電網 相連。根據CISPR22標準的規定，在與電子或電氣產品1 相距3米或1 0米的位置處設置接收S線3，用以接收來自 電子或電氣產品1的輻射。該接收天線3還連接至輻射測 量設備4，該輻射測量設備4用以測量通過接收天線3所接 收的電子或電氣產品1的輻射場強。 [0004] 根據例如CISPR22標準的規定，在30-1 000MHZ輻射場強 測試下，電子或電氣產品的輻射場強通常要求控制在6dB 以下。但在不同的實驗室進行測試時測試結果存在差異 ，甚至有時差異會達到10dB以上。即使在出廠時電子或 電氣產品的輻射場強測試結果符合規定，但到市場上或 製造商的客戶那裏還是會遇到產品的輻射強度變為不合 格的情況，這給產品製造商造成了很大的困擾。 10121256^^^^ A〇101 ^ 3 1 / ^· 15 I 1012040374-0 44441990 [0005] [0006] [0007] 【新型内容] 針對上述現有技術中所存在的問題，創作人經深入研究 發現，輻射騷擾一般是通過電源線上的共模電流產生的 電礤場輻射到空間而產生的。AC電源線上共模電流的大 小與AC電源插座的共模阻抗有直接關係，共模阻抗越大 共模電流越小，輻射場強隨之減小，反之共模阻抗越小 共核電流越大，骑場強也越大。f通的插座由於插座 的形狀和結構不同，以及插座下面電源線佈線不同等都 會對AC電源插座的共模阻抗有影響，所以普通的插座雖 :低頻電氣性能可以保持—致但高頻性能差異很大。不 同實驗至中AC電源插座的共模阻抗差異比較大從㈣幾 ^歐不等。而且，nspR22標準中並沒有對電源端的共 級抗做出規定’因而導致不同實驗室或使用不同的AC 電原插座進仃職時所得的輕射騷擾測量結果差異比較 大’即’導致，射騷擾場強測量結果不一致。 射^於此’本創作的目的是提供—種能夠在進行輕射發 線M# (即’輕射騷擾強度測量）時為腿電源端口提供 晉性穩定吨錢糾測量結果鋪-致⑽抗穩定裝 及具有該阻抗穩定袭置的電子或電氣設備。p且」作的另~目的在於提供—種結構簡單、成本低廉的 几穩定裳置及具有該阻抗穩定裝置的電子或電氣設備M443990 V. New description: [New technical field] [0001] The present invention relates to an impedance stabilization device and an electronic or electrical device having the same. [Prior Art] [0002] Generally, electronic or electrical products require various performance tests to verify their eligibility before leaving the factory. The radiation field strength test is one of these tests. First, it is used to measure the radiation of electronic or electrical products. Whether the field strength is within the specified range. [0003] A schematic block diagram of the measurement of the radiation (harassment) field strength of an electronic or electrical product in the prior art will now be described with reference to FIG. As shown in Figure 1, the electronic or electrical product (i.e., the device under test (EUT) 1) is plugged directly into the normal AC power outlet 2 (the impedance of which is unknown) through its AC power cord to connect to the AC grid. According to the CISPR 22 standard, a receiving S line 3 is provided at a position 3 m or 10 m from the electronic or electrical product 1 for receiving radiation from the electronic or electrical product 1. The receiving antenna 3 is also connected to a radiation measuring device 4 for measuring the radiation field strength of the electronic or electrical product 1 received by the receiving antenna 3. [0004] According to the CISPR 22 standard, for example, under the radiation field strength test of 30-1 000 MHz, the radiation field strength of an electronic or electrical product is usually required to be controlled below 6 dB. However, when testing in different laboratories, the test results are different, and sometimes the difference will reach more than 10dB. Even if the radiation field strength test results of electronic or electrical products are in compliance with the regulations at the factory, there is still a case where the radiation intensity of the product becomes unqualified in the market or the manufacturer's customers, which causes a lot to the product manufacturer. Big troubles. 10121256^^^^ A〇101 ^ 3 1 / ^· 15 I 1012040374-0 44441990 [0005] [0006] [New content] In view of the problems existing in the above prior art, the creator has intensively discovered that Radiated disturbances are typically generated by the electric field generated by the common mode current on the power line radiating into space. The common mode current on the AC power line is directly related to the common mode impedance of the AC power socket. The larger the common mode impedance is, the smaller the common mode current is, and the smaller the radiation field strength is. The smaller the common mode impedance is, the larger the common core current is. The ride is stronger. Because the shape and structure of the socket are different, and the power cable wiring under the socket is different, it will affect the common mode impedance of the AC power socket. Therefore, the ordinary socket can maintain the low frequency electrical performance - but the high frequency performance difference Very big. The difference in common mode impedance between different experimental and medium AC power outlets is relatively large (4) and several ohms. Moreover, the nspR22 standard does not stipulate the common-level resistance of the power supply terminal. This results in a difference in the light-light disturbance measurement results obtained by different laboratories or different AC power sockets. The disturbance field strength measurement results are inconsistent. The purpose of this creation is to provide a kind of ability to provide a stable and stable measurement result for the leg power port when performing the light-emitting line M# (ie, the measurement of the light-shooting intensity)--(10) Stable and electronic or electrical equipment with this impedance stabilization. The other purpose of p is to provide a stable and low-cost stable electrical device and an electronic or electrical device having the impedance stabilization device.
[0008]本創作的又—目 此 的在於提供一種隔離EUT與AC電網之間的 擾的jt且抗穩定裝置及具有該阻抗穩定裝置子 或電氣設備。 10121256#單编號 A0101 第4頁/共15 頁 1012040374-0 M443990 [0009] 為了實現上述目的，本創作提供一種阻抗穩定裝置，包 括：共模扼流器件，具有用於連接至AC電網的輸入端、 一輸出瑞以及連接在該輸入端與該輸出端之間能夠隔離 該AC電網的阻抗的扼流部分；以及旁路電路，一端連接 至該共模扼流器件的輸出端，另一端接參考地平面。[0008] A further object of the present invention is to provide a jt and anti-stabilization device for isolating interference between an EUT and an AC grid and having the impedance stabilizing device or electrical device. 10121256#单编号A0101 Page 4 of 15 1012040374-0 M443990 [0009] In order to achieve the above object, the present invention provides an impedance stabilization device comprising: a common mode choke device having an input for connection to an AC grid a terminal, an output sag, and a turbulent portion connected between the input terminal and the output terminal capable of isolating the impedance of the AC power grid; and a bypass circuit having one end connected to the output end of the common mode choke device and the other end connected Refer to the ground plane.
[0010] 優選地，該旁路電路包括串聯連接的第一電容和第一電 阻、串聯連接的第二電容和第二電阻，該第一電容的與 該第一電阻相反的一端連接至該共模扼流器件的輸出端 的、對應於該AC電網的線L1的輸出端子，該第二電容的 與該第二電阻相反的一端連接至該共模扼流器件的輸出 端的、對應於該AC電網的線N的輸出端子，且該第一電阻 和第二電阻接參考地平面。 [0011] 優選地，該扼流部分是通過將該輸入端與該輸出端之間 的線共繞在一磁環上、同向分別繞在一磁環上、穿過一 磁芯材料、或者以上的組合而形成的。 [0012] 優選地，該第一電阻和第二電阻的電阻值相同。[0010] Preferably, the bypass circuit includes a first capacitor and a first resistor connected in series, a second capacitor and a second resistor connected in series, and an end of the first capacitor opposite to the first resistor is connected to the common An output terminal of the analog choke device corresponding to the line L1 of the AC power grid, and an end of the second capacitor opposite to the second resistor is connected to the output end of the common mode choke device corresponding to the AC grid The output terminal of the line N, and the first resistor and the second resistor are connected to the ground plane. [0011] Preferably, the turbulent portion is co-wound on a magnetic ring by a line between the input end and the output end, respectively wound on a magnetic ring, through a magnetic core material, or Formed by the above combination. [0012] Preferably, the resistance values of the first resistor and the second resistor are the same.
[0013] 優選地，該第一電阻和第二電阻的電阻值均為100歐姆。 [0014] 優選地，該旁路電路還包括串聯連接的第三電容和第三 電阻，該第三電容的與該第三電阻相反的一端連接至該 共模扼流器件的輸出端的、對應於該AC電網的線PE的輸 出端子，該第三電阻接參考地平面。 [0015] 優選地，該第一電阻、第二電阻和第三電阻的電阻值相 同。 [0016] 優選地，該第一電阻、第二電阻和第三電阻的電阻值均 10121256严編請01 第5頁/共15頁 1012040374-0 4M43990 ----------------------------------- 為150歐姆。 [0017] 本創作還提供一種電子或電氣設備，其具有如上所述之 阻抗穩定裝置，並能通過該阻抗穩定裝置與AC電網連接 [0018] 综上所述，本創作包括如下所述的多個優點。當然，實 施本創作的任一產品並不一定需要同時達到以上所述的 所有優點。 [0019] (1)可以為待測設備（EUT)提供已知的、穩定的共模 阻抗，使待測設備（EUT)的輻射騷擾發射電平不會受到 插座阻抗的影響。 [0020] (2)可以將待測設備（EUT)與電網的共模騷擾相隔離 [0021] (3)電路結構簡單、製作成本低且容易推廣實施。 【實施方式】 [0022] 下面將詳細描述本創作的實施例。應當注意，這裏描述 的實施例僅用於舉例說明，並不用於限制本創作。儘管 在本文中以CISPR22標準為例，但本領域的技術人員可以 理解，本創作同樣適用於其他類似的標準。 [0023] 首先，參考圖3描述根據本創作的阻抗穩定裝置的基本結 構。如圖3所示，根據本創作的阻抗穩定裝置5包括共模 扼流器件51和旁路電路52。該共模扼流器件51具有一輸 入端511、一輸出端513以及連接在該輸入端511與該輸 出端513之間的扼流部分512，該輸入端511用於連接至 AC電源插座（即，AC電網），該輸出端513用於連接至待 1012040374-0 1()121256f單編號A0101 第6頁/共15頁 M443990 測設備（EUT)的AC端口。該旁路電路52的一端連接至共 模扼流器件51的輸出端513 ’且另一端接參考地平面（即 ，參考地）。 [0024]接著，將參考圖4描述根據本創作第一實施例的阻抗穩定 裝置的具體電路，圖4示出了在待測設備（ΕϋΤ)的電源 無接地線的情況下阻抗穩定裝置5的電路及其與Α(；電網2 和待測設備EUT 1的連接關係。如圖4所示，阻抗穩定裝 置5中的共模扼流器件51的輸入端511連接至AC電網2的 線L1和N ’輸出端直接連接到待測設備（EUT) 1的“端 口. ’且扼流部分512通過將輸入端511與輸出端513之間 的線共繞在一磁環上、同向分別繞在一磁環上、穿過一 磁芯材料、或者以上的組合等而形成。在圖中位於共模 扼流器件51右侧的線L1 (即，共模扼流器件51的輸出端 51 3的、對應於AC電網2的線L1的輸出端子）與串聯的電 容C1和電阻R1相連接，且在圖中位於共模扼流器件51右 側的線N (即，共模扼流器件51的輸出端513的、對應於 AC電網2的線N的輸出端子）與串聯的電容C2和電阻尺2相 速接，且電阻R1和R2與參考地平面相接，其中電容ci、 C2以及電阻Rl、R2構成旁路電路52 ^共模扼流器件51為 右側電源線上的共模信號提供高阻抗，隔離Ac電網端阻 抗的影響’電容C1和C2用於為共模信號提供通路同時隔 離AC電網與參考地，電阻R1和R2用於提供穩定的共模阻 抗。電阻R1和R2的電阻值可以相同也可以不同。優選地 ，電阻R1和R2的電阻值均為r，在此情況下，euT對參考 地的共模阻抗Z = R/2。Z的值可以設計為通用值（例如5〇 Q)，即，Κ = 100.Ω。 1012040374-0 矗單煸號―1 第7頁/共15頁 10121256^ • [0025]然後將參考圖5描述根據本創作第二實施例的阻抗穩定裝 置5的具體電路，圖5示出了在待測設備（Ευτ)的電源 有接地線的情況下阻抗穩定裝置5，的電路及其與4(：電網 2和待測設備（EUT) 1的連接關係。第二實施例與第一實 施例的不同之處在於’待測設備（EUT)的電源具有接地 線’故所使用的AC電網比第一實施例中多了 一條線pE， 相應地’阻抗穩定裝置5’时路電路52，比第一實施例 中的旁路電路52多了-組串聯的電容C3和電阻R3，且該 電容C3與在圖中位於共模扼流器件51右侧的線pE (即， 共模扼流器件51的輸出端513的、對應於^電網2的線pE · 的輸出端子）相連接，且電陶與參考地連接。與第一 實施例類似地，共模扼流器件51為右側電源線上的共模 信號提供高阻抗，隔眺電網⑽抗的影響，電容d、 C2和C3用於為共模信號提供通路同時隔離電網與參考地 ，電刪、_R3用於提供穩Μ共娜抗。電阻R1、 R2和R3的電阻值可以相同也可以不同。優選地，電阻ri 、R2和R3的電阻值均為R ’在此情況下，謝對參考地的 共模阻抗Z=R/3eZ的值可以設計為通用值（例如咖）· ，即，ΙΜ50Ω 〇 _下祕參考圖2描述顧本創作心抗穩絲置對待測設 備（謝）的輻射場強進行測量的示意性方框圖。如圖°2 所不’待測設備（EUT)l通過随抗穩定裝置5或5，連接 到普通的AC電源插座2以與AC電網相連。根據CISpR22標 準的規定，在與待測設備⑽T) i相距3米或1〇米的位置 處設置接收天線3’用以接收來自待測設備（EUT) !的轄 射。該接收天線3還連接至細㈣設備4， 10121256 产單编號 ,0101 第8頁/共15 κ 町判重 1012040374-0 M443990 [0027] • [0028] [0029] [0030][0013] Preferably, the resistance values of the first resistor and the second resistor are both 100 ohms. [0014] Preferably, the bypass circuit further includes a third capacitor and a third resistor connected in series, and an end of the third capacitor opposite to the third resistor is connected to an output end of the common mode choke device, corresponding to An output terminal of the line PE of the AC power grid, the third resistor being connected to a ground plane. [0015] Preferably, the resistance values of the first resistor, the second resistor, and the third resistor are the same. [0016] Preferably, the resistance values of the first resistor, the second resistor, and the third resistor are all 10121256, and the number of the first resistor, the second resistor, and the third resistor is 01, a total of 15 pages, 1012040374-0, 4M43990, ------------ ----------------------- is 150 ohms. [0017] The present invention also provides an electronic or electrical device having an impedance stabilizing device as described above, and capable of being connected to an AC power grid through the impedance stabilizing device. [0018] In summary, the present invention includes the following Advantages. Of course, any product that implements this creation does not necessarily need to achieve all of the advantages described above. [0019] (1) A known, stable common mode impedance can be provided for the device under test (EUT) such that the radiated disturbance emission level of the device under test (EUT) is not affected by the impedance of the socket. [0020] (2) The device under test (EUT) can be isolated from the common mode disturbance of the power grid [0021] (3) The circuit structure is simple, the manufacturing cost is low, and it is easy to popularize and implement. [Embodiment] [0022] An embodiment of the present creation will be described in detail below. It should be noted that the embodiments described herein are for illustrative purposes only and are not intended to limit the present invention. Although the CISPR 22 standard is exemplified herein, those skilled in the art will appreciate that the present application is equally applicable to other similar standards. [0023] First, the basic structure of the impedance stabilizing apparatus according to the present invention will be described with reference to FIG. As shown in Fig. 3, the impedance stabilizing device 5 according to the present invention includes a common mode choke device 51 and a bypass circuit 52. The common mode choke device 51 has an input terminal 511, an output terminal 513, and a choke portion 512 connected between the input terminal 511 and the output terminal 513. The input terminal 511 is used for connecting to an AC power socket (ie, , AC grid), the output terminal 513 is used to connect to the AC port of the M443990 measuring device (EUT) to be 1012040374-0 1 () 121256f single number A0101 page 6 / 15 page. One end of the bypass circuit 52 is connected to the output terminal 513' of the common mode choke device 51 and the other end is connected to the ground plane (i.e., reference ground). [0024] Next, a specific circuit of the impedance stabilizing apparatus according to the first embodiment of the present creation will be described with reference to FIG. 4, which shows the impedance stabilizing device 5 in the case where the power source of the device under test (无) has no grounding line. The circuit and its connection relationship with the grid 2 and the device under test EUT 1. As shown in Fig. 4, the input terminal 511 of the common mode choke device 51 in the impedance stabilization device 5 is connected to the line L1 of the AC grid 2 and The N' output is directly connected to the "port." of the device under test (EUT) 1 and the choke portion 512 is wound around the line between the input end 511 and the output end 513 on a magnetic ring, respectively. Formed on a magnetic ring, through a core material, or a combination of the above, etc. The line L1 on the right side of the common mode choke device 51 in the figure (ie, the output end 51 of the common mode choke device 51) The output terminal of the line L1 corresponding to the AC grid 2 is connected to the capacitor C1 and the resistor R1 connected in series, and is located at the line N on the right side of the common mode choke device 51 in the figure (ie, the output of the common mode choke device 51). The output terminal of the terminal 513 corresponding to the line N of the AC power grid 2) and the series capacitor C2 and the resistor 2 phase velocity And the resistors R1 and R2 are connected to the reference ground plane, wherein the capacitors ci, C2 and the resistors R1, R2 form a bypass circuit 52. The common mode choke device 51 provides high impedance to the common mode signal on the right power line, and isolates the AC grid. The effect of the terminal impedance 'capacitors C1 and C2 are used to provide a path for the common mode signal while isolating the AC grid from the reference ground. The resistors R1 and R2 are used to provide a stable common mode impedance. The resistance values of the resistors R1 and R2 may be the same or different. Preferably, the resistance values of the resistors R1 and R2 are both r, in which case the common mode impedance of the euT to the reference ground is Z = R/2. The value of Z can be designed as a common value (eg 5 〇 Q), ie , Κ = 100. Ω. 1012040374-0 矗单煸号 - 1 Page 7 / Total 15 pages 10121256^ • [0025] A specific circuit of the impedance stabilization device 5 according to the second embodiment of the present creation will be described next with reference to FIG. 5 shows the circuit of the impedance stabilizing device 5 in the case where the power source of the device under test (Ευτ) has a ground line, and its connection relationship with 4 (: the grid 2 and the device under test (EUT) 1. Second The difference between the embodiment and the first embodiment is that the power of the device under test (EUT) The AC grid used has the same line pE as in the first embodiment, and accordingly the 'impedance stabilization device 5' time circuit 52 is larger than the bypass circuit 52 in the first embodiment. The capacitor C3 and the resistor R3 are connected in series, and the capacitor C3 is connected to the line pE on the right side of the common mode choke device 51 in the figure (i.e., the line corresponding to the grid 2 of the output terminal 513 of the common mode choke device 51) The output terminal of pE · is connected, and the pottery is connected to the reference ground. Similarly to the first embodiment, the common mode choke device 51 provides high impedance to the common mode signal on the right power line, and the influence of the grid (10) resistance Capacitors d, C2, and C3 are used to provide a path for the common mode signal while isolating the grid from the reference ground, and the _R3 is used to provide a stable cascode. The resistance values of the resistors R1, R2, and R3 may be the same or different. Preferably, the resistance values of the resistors ri, R2, and R3 are both R'. In this case, the value of the common mode impedance Z=R/3eZ of the reference ground can be designed as a general value (for example, coffee), that is, ΙΜ50Ω. 〇_下秘 Refer to Figure 2 to describe a schematic block diagram of the radiation field strength of the device to be tested (Xie). As shown in Fig. 2, the device under test (EUT) 1 is connected to the normal AC power outlet 2 via the anti-stabilization device 5 or 5 to be connected to the AC power grid. According to the CISpR22 standard, the receiving antenna 3' is provided at a position 3 m or 1 m from the device to be tested (10) T) to receive the modulation from the device under test (EUT)!. The receiving antenna 3 is also connected to the thin (4) device 4, 10121256, the order number, 0101, 8th, 15th, 5th, 5th, 10th, 40th, 40th, 10th, 40th, 10th, 10th, 10th, 10th, 10th, 10th, 10th, 10th
[0031] [0032] [0033] 設備4用以測量通過接收天線3所接收的待測設備（EUT) 1的輻射場強。 在圖2中，在輻射強度測試頻率（例如根據CISPR22標準 的規定為30-lOOOMHz)下，阻抗穩定裝置5或5’為待測 設備（EUT) 1提供了穩定的共模阻抗，從而避免了待測 設備（EUT)產生的輻射騷擾在不同的實驗室或用不同的 AC插座差異很大，因而可以大大提高輻射測試結果的一 致性。 而且，本創作的阻抗穩定裝置5或5’可以將待測設備（ EUT)與AC電網的共模騷擾相隔離。 此外，本創作的阻抗穩定裝置5或5’的電路結構簡單、 製作成本低且容易推廣實施。 儘管上面以示例性實施例的方式對本申請進行了詳細描 述，但本申請的範圍不限於上述實施例，本領域的技術 人員可以對本申請進行各種改進和變型，這些均不脫離 本申請的範圍和構思。 【圖式簡單說明】 圖1示出了現有技術中對電子或電氣產品的輻射場強進行 測量的示意性方框圖。 圖2示例性示出了根據本創作對電子或電氣產品（即，待 測設備（EUT))的輻射場強進行測量的示意性方框圖。 圖3示例性示出了根據本創作的阻抗穩定裝置的基本結構 框圖® 10121256^^^^ A〇101 第9頁/共15頁 1012040374-0 M443990 [0034] 圖4示例性示出了根據本創作第一實施例的阻抗穩定裝置 的電路圖。 [0035] 圖5示例性示出了根據本創作第二實施例的阻抗穩定裝置 的電路圖。 【主要元件符號說明】 [0036] 1 :待測設備（EUT) [0037] 2 : AC電網、AC電源插座 [0038] 3:接收天線 [0039] 4:輻射測量設備 [0040] 5、5’ ：阻抗穩定裝置 [0041] 51 :共模扼流器件 [0042] 52、52’ ：旁路電路 [0043] 511 :輸入端 [0044] 512 :扼流部分^ [0045] 513 :輸出端 [0046] Cl、C2、C3 :電容 [0047] L卜N、PE :線 [0048] Rl、R2、R3 :電阻[0033] The device 4 is used to measure the radiation field strength of the device under test (EUT) 1 received by the receiving antenna 3. In Figure 2, the impedance stabilization device 5 or 5' provides a stable common mode impedance for the device under test (EUT) 1 at a radiation intensity test frequency (e.g., 30-1000 MHz as specified by the CISPR 22 standard), thereby avoiding The radiated disturbances generated by the equipment under test (EUT) vary widely in different laboratories or with different AC outlets, thus greatly improving the consistency of the radiation test results. Moreover, the impedance stabilization device 5 or 5' of the present invention can isolate the device under test (EUT) from the common mode disturbance of the AC grid. Further, the impedance stabilization device 5 or 5' of the present invention has a simple circuit structure, is low in manufacturing cost, and is easy to implement. While the present invention has been described in detail by way of example embodiments, the scope of the present application is not limited to the embodiments described above, and various modifications and changes can be made by those skilled in the art without departing from the scope of the application. Conception. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic block diagram showing the measurement of the radiation field intensity of an electronic or electrical product in the prior art. Fig. 2 exemplarily shows a schematic block diagram for measuring the radiation field strength of an electronic or electrical product (i.e., an equipment to be tested (EUT)) according to the present creation. FIG. 3 exemplarily shows a basic structural block diagram of an impedance stabilizing apparatus according to the present invention® 10121256^^^^ A〇101 9/15 1512040374-0 M443990 [0034] FIG. 4 exemplarily shows A circuit diagram of the impedance stabilization device of the first embodiment of the present invention. [0035] FIG. 5 exemplarily shows a circuit diagram of an impedance stabilization device according to a second embodiment of the present creation. [Main component symbol description] [0036] 1 : Device under test (EUT) [0037] 2 : AC power grid, AC power outlet [0038] 3: Receiving antenna [0039] 4: Radiation measuring device [0040] 5, 5' : Impedance Stabilizer [0041] 51 : Common Mode Choke Device [0042] 52, 52': Bypass Circuit [0043] 511: Input [0044] 512: Choke Section ^ [0045] 513: Output [0046 ] Cl, C2, C3: Capacitor [0047] L Bu N, PE: Line [0048] Rl, R2, R3: Resistor
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