臺灣博碩士論文加值系統

本篇論文以智慧型手機的耳機音頻輸出電路為實驗平台，研究在EN301489法規的輻射免疫性(RS)與傳導耐受性(CS)測試下，分析除錯前使用0201尺寸的BLM15HD182SN1 bead時所量測的上傳訊號(Uplink signal)與下載訊號(Downlink signal)，分別在8MHz~108MHz頻帶測試失敗的原因。針對RS與CS測試原理，分別找出電路上干擾傳遞路徑並且選出適當的bead來同時防止RS與CS測試的干擾訊號。同時bead不能影響聲音訊號與FM的RSSI值，又能防止地雜訊經FM的GND輻射到空中。根據實作結果，採用bead規格為BLM15EG121SN1與BLM15PD600SN1與BLM15PD800SN1皆可通過測試，選用的Rated current 要介於1500mA ~ 1700mA之間，Impedance@100MHz要挑選在60~120ohm之間，DC Resistance值介於2.2~0.06 ohm。

This ground line of the earphone audio circuit also doubles as the FM antenna of a smart phone. Its use, between, was found to caucal the phone to fail the radiaed and conducted susceptibility (RS/CS) tests per EN301489 standard in the frequency range 8MHz~108MHz. It was found that the ferrite bead used to connect the earphone to PCB ground should be replaced by an ofen bead with more appropriate DC resistance and RF impedance profile. A series of experiments were conducted to pick beads tha enable the phone to pass the RS and CS tests, while not compromise its FM neception, audio, and radiated emission (RE) performance.

中文摘要 ............................................. i
英文摘要 .............................................ii
誌謝.................................................iii
目錄..................................................iv
圖目錄..............................................viii
表目錄..............................................xiii
第一章　緒論............................................1
1.1 研究動機...........................................1
1.2 章節介紹...........................................2
第二章 理論基礎.........................................3
2.1 當耳機線作為FM_ANT使用..............................3
2.2 實驗平台與實驗流程介紹...............................7
2.3 手機實驗環境介紹與測試規範............................8
2.3.1 輻射性耐受測試(RS)...............................8
2.3.1.1 輻射性耐受測試介紹...............................8
2.3.1.2 RS測試步驟......................................9
2.3.2 傳導性耐受測試(CS)...............................13
2.3.2.1 傳導性耐受測試所引起的限制.......................13
2.3.2.2 CS測試步驟.....................................13
2.3.3 手機音頻測試規範與標準.............................17
2.3.3.1 發送端空閒通道噪音(Idle Channel Noise-Sending)...19
2.3.3.2 接收端空閒通道噪音(Idle Channel Noise-Receiving).19
2.3.4 FM RSSI測試......................................21
2.3.5 輻射性放射測試....................................22
2.3.5.1 輻射性放射測試步驟...............................23
第三章 除錯前測試........................................26
3.1 測試手機在VL3原本使用BLM15HD182SN1的bead.............26
3.1.1 RS測試時手機0度放置測試數據.........................26
3.1.2 CS測試時測試數據..................................29
3.1.3 Acoustic測試報告驟................................31
3.1.3.1 Idle Channel Noise-Sending測試報告.............31
3.1.3.2 Idle Channel Noise-Receiving測試報告...........33
3.1.4 FM RSSI測試報告..................................36
3.1.5 電磁輻射發射測試報告..............................36
第四章　除錯前實驗分析....................................38
4.1 分析為何RS測試與CS測試失敗...........................38
4.2 分析為何Acoustic測試與FM RSSI測試與RE測試通過片.......44
第五章　除錯實驗方法及測試結果分析.........................46
5.1 除錯實驗方法........................................46
5.1.1 在VL3位置換成使用BLM15EG121SN1 bead 進行測試.......46
5.1.1.1 RS測試報告.....................................49
5.1.1.2 CS測試報告.....................................52
5.1.1.3 Acoustic測試報告...............................54
5.1.1.3.1 Idle Channel Noise-Sending測試報告...........54
5.1.1.3.2 Idle Channel Noise-Receiving測試報告.........56
5.1.1.4 FM RSSI測試數據................................58
5.1.1.5 RE測試數據.....................................58
5.1.2 在VL3位置換成使用BLM15GG221SN1 bead 進行測試.......61
5.1.2.1 RS測試報告.....................................61
5.1.3 在VL3位置換成使用BLM15EG221SN1 bead 進行測試.......62
5.1.3.1 RS測試報告.....................................63
5.1.4 在VL3位置換成使用BLM15PD800SN1 bead進行測試........64
5.1.4.1 RS測試報告.....................................65
5.1.4.2 CS測試報告.....................................71
5.1.4.3 Acoustic測試報告...............................72
5.1.4.3.1 Idle Channel Noise-Sending測試報告...........72
5.1.4.3.2 Idle Channel Noise-Receiving測試報告.........74
5.1.4.4 FM RSSI測試報告................................76
5.1.4.5 RE測試報告.....................................76
5.1.5 在VL3位置換成使用BLM15PD600SN1 bead進行測試........79
5.1.5.1 RS測試報告.....................................79
5.1.5.2 CS測試報告.....................................85
5.1.5.3 Acoustic測試報告...............................86
5.1.5.3.1 Idle Channel Noise-Sending測試報告...........86
5.1.5.3.2 Idle Channel Noise-Receiving測試報告.........88
5.1.5.4 FM RSSI測試報告................................90
5.1.5.5 RE測試報告.....................................90
5.1.6 在VL3位置換成使用BLM15PD800SN1 bead進行測試........93
5.1.6.1 RS測試報告.....................................93
5.2 RS測試結果討論......................................94
5.2.1 RS測試手機0度放置測試結果討論.......................94
5.2.2 RS測試手機180度放置測試結果討論.....................96
5.3 CS測試結果討論......................................97
5.4 Acoustic測試結果討論................................99
5.5 FM RSSI測試結果討論................................100
5.6 RE測試結果討論.....................................100
第六章 結論.............................................102
參考文獻................................................103
附錄一 ................................................104

[1] 姚啟元，EMC電磁相容測試與對策技術，全華，2005.
[2] EN61000-4-3:2006+A1:2008+A2:2010, Test Standard.
[3] ETSI EN 301489-1 V1.9.2 Section 9.2, Product Standard Sep. 2011.
[4] EN61000-4-6:2009, Test Standard.
[5] ETSI EN 301489-1 V1.9.2 Section 9.5, Product Standard,Sep. 2011.
[6] “3GPP TS 26.131” V12.1.0 and “3GPP TS 26.132” V12.1.0
http://www.3gpp.org.
[7] “YD/T 1538-2006 (數字移動終端音頻性能技術要求和測試方法)”中
國信息產業部，Jan. 2007.
[8] “ITU-T Recommendation P.380”, Electro-acoustic measurements on
headsets, Nov. 2003.
[9] EN55022:2006/A1:2007 Class B, Test Standard.
[10] ETSI EN 301489-1 V1.9.2 Section 8.2, Product Standard, Sep. 2011.
[11] BLM15HD182SN1 Specification, http://www.murata.com/
[12] BLM15EG121SN1 Specification, http://www.murata.com/
[13] BLM15GG221SN1 Specification, http://www.murata.com/
[14] BLM15EG221SN1 Specification, http://www.murata.com/
[15] BLM15PD800SN1 Specification, http://www.murata.com/
[16] BLM15PD600SN1 Specification, http://www.murata.com/
[17] BLM15PD300SN1 Specification, http://www.murata.com/