1、 Automotive Grade Coaxial Cable Performance Specification The research data, analysis, conclusion, opinions and other contents of this document are solely the product of the authors. Neither the Society of Automotive Engineers, Inc. (SAE) nor the United States Council for Automotive Research (USCAR)
2、 certifies the compliance of any products with the requirements of nor makes any representations as to the accuracy of the contents of this document nor to its applicability for purpose. It is the sole responsibility of the user of this document to determine whether or not it is applicable for their
3、 purposes. Copyright g1642006, USCAR ISBN: 0-7680-1711-4 All rights reserved. Printed in U.S.A. Issued 2006-01 SAE/USCAR- 29 QUESTIONS REGARDING THIS DOCUMENT: (724) 772-8518 FAX (724) 776-3036 TO PLACE A DOCUMENT ORDER: (724) 776-4970 FAX (724) 776-0790 SUMMARY OF CONTENTS 1 SCOPE 2 2 REFERENCES 2
4、3 GLOSSARY OF TERMS .2 4 GENERAL REQUIREMENTS .2 4.1 Cable Description .2 4.2 Restricted and Reportable Substances 3 4.3 Finished Cable, Dimensional Requirements 3 4.4 Cable Identification.3 4.5 Workmanship3 4.6 Specification Sheets.4 4.7 Sample Preparation4 4.8 Equipment 4 5 TEST REQUIREMENTS5 5.1
5、Electrical Test Requirements5 5.2 Mechanical and Enviromental Test Requirements .7 APPENDIX A 10 Initial Certification Requirements.10 Continuing Conformance Requirements .10 APPENDIX B 11 Default Tolerance Table11 APPENDIX C 12 REVISIONS 12 SAE/USCAR-29 Issued January 2006 Automotive Grade Coaxial
6、Cable Performance Specification - 2 - 1 SCOPE: This document specifies dimensional, functional and visual requirements for Automotive grade coaxial cable. This material will be designated AG for general-purpose automotive applications or AG LL for low loss applications. It is the responsibility of t
7、he user of this cable to verify the suitability of the selected product (based on dimensional, mechanical, electrical and environmental requirements) for its intended application. It is the responsibility of the supplier to retain and maintain records as evidence of compliance to the requirements de
8、tailed in this standard. 2 REFERENCES: SAE/USCAR-2 SAE/USCAR-17 SAE/USCAR-18 SAE/USCAR-19 MIL C- 17G SAE J 1128 ISO 6722 IMDS STD101 Global Automotive Declarable Substance list. See: www.gadsl.org DaimlerChrysler: CS-9003 Ford: WSS-M99P9999-A1 General Motors: GMW 3059 3 GLOSSARY OF TERMS: IMDS: Inte
9、rnational Material Data system ILRS: International List of Reportable Substances Automotive Grade 174 (AG174) similar to RG 174 Automotive Grade 174 Low Loss (AG 174 LL) 4 GENERAL REQUIREMENTS: 4.1 Cable Description: 4.1.1 Temperature Class: All AG and AG LL Coaxial cable covered by this specificati
10、on shall be tested to and meet or exceed the requirements of the temperature class 1 as specified in SAE/USCAR-2. Coaxial cable capable of meeting higher temperature class requirements shall be identified by printing the temperature class on the jacket. (e.g., USCAR class 2) All cable covered in thi
11、s specification shall be compatible with RF connectors as specified in SAE/USCAR-17, SAE/USCAR-18 and SAE/USCAR-19. SAE/USCAR-29 Issued January 2006 Automotive Grade Coaxial Cable Performance Specification - 3 - 4.1.2 Operating Frequency: The cable covered in this document will function in the Opera
12、ting frequency range of DC to 4 GHz. 4.1.3 Fluid Resistance Requirements: When this cable is to be used in an area that will be exposed to automotive fluids it must be tested to the Fluid compatibility test defined in SAE J 1128. 4.2 Restricted and Reportable Substances: All materials used in Automo
13、tive Grade Coaxial Cable shall be free of intentionally added Lead, Cadmium, Hexavalent Chrome or Mercury and shall conform to the requirements of the OEM restricted material requirements. See: Section 2 References. The material contents of this cable shall be reported in the IMDS format. 4.3 Finish
14、ed Cable, Dimensional Requirements: Finished cable dimensions shall meet values listed in table 1. Measurement method shall be per MIL-C-17G 4.8.1 4.8.1.4.1 AG174 and AG174LL Outer Jacket diameter .110” +/- .004” Shield diameter .088” max. Dielectric diameter 0.060” +/- .003” Inner conductor diamete
15、r .0195”+/- .0015” TABLE 1: Finished Cable Dimensions 4.4 Cable Identification: Cable identification shall include the appropriate Automotive Grade designation and temperature class as a minimum. Properties such as jacket color or other printing shall be agreed upon between customer and supplier. 4.
16、5 Workmanship: Finished cable must meet the requirements shown in this standard over the entire length and at any point in a material lot. SAE/USCAR-29 Issued January 2006 Automotive Grade Coaxial Cable Performance Specification - 4 - 4.6 Specification Sheets: Supplier shall provide detailed specifi
17、cation sheets listing all physical, electrical, mechanical, and attenuation characteristics of the finished cable. 4.7 Sample Preparation: A minimum of 5 cable samples is required for each test unless otherwise specified. These samples are to be randomly cut from the production lot(s) to be tested.
18、Each sample will be prepared per the requirement of the specific test. Suitable SMA connectors will be utilized to terminate the cable for electrical testing. 4.8 Equipment: This list is intended to highlight specialized equipment required to perform the electrical testing specified in this document
19、. Other general purpose lab tools equipment and supplies will also be required.* Item Description Requirements 1 High Voltage Source 800V AC 2 Network Analyzer 6GHz Minimum S Parameter w/Time Domain Capability (see #4) 3 Spark Tester 1750 V Min 4 TDR (Time Domain Reflectometer) With Impedance capabi
20、lity TABLE 4.8: Coaxial Cable Test Equipment *Note: Flame, Abrasion, Immersion, etc. tests listed in this document may contain specific fixture, equipment and tooling requirements. Other general lab equipment such as tensile testers and environmental chambers are to be available for use as required.
21、 SAE/USCAR-29 Issued January 2006 Automotive Grade Coaxial Cable Performance Specification - 5 - 5 TEST REQUIREMENTS: 5.1 Electrical Test Requirements: Test Reference Method/procedure Requirement Continuity test MIL C 17G 3.7.1 MIL C 17G 4.8.2 Each conductor and shield must be continuous Spark test
22、MIL C 17G 3.7.2 MIL C 17/119G 4.8.3 No jacket breakdown or flash over 2KV rms Dielectric Withstanding Voltage MIL C 17G 3.7.3 MIL C 17G 4.8.4 No breakdown or flash over 800V rms Inner to outer conductorInsulation resistance MIL C 17G 3.7.4 MIL C 17G 4.8.5 g149 10x106Mg159/m Characteristic impedance
23、MIL C 17G 3.7.6 MIL C 17G 4.8.7 50 +/- 2 Ohms Rf Insertion loss (attenuation) MIL C 17G 3.7.7 MIL C 17G 4.8.8 Shall not exceed values shown in Figure 3 and Table 3. Return loss MIL C 17G 3.7.8 MIL C 17G 4.8.9 15.5db min* Capacitance MIL C 17G 3.7.9 MIL C 17G 4.8.10 31pF/ft nom. Velocity Of Propagati
24、on MIL- C 17G MIL- C 17G 6.5.3 64% min. Shielding Effectiveness (Transfer Impedance) Transfer impedance method IEC 1156-1 2.1.1.2 AG174 35 db min AG174LL 60db min Center conductor resistance Use a resistance measuring device with an accuracy of 0.5% and a temperature measurement device with n accura
25、cy of 0.5o C 8.4 ohms/100 ft. Max. 23o C *VSWR 1.3 max TABLE 2: Electrical Tests, Methods and Requirements SAE/USCAR-29 Issued January 2006 Automotive Grade Coaxial Cable Performance Specification - 6 - Attenuation vs. Frequency0102030405060700 500 1000 1500 2000 2500 3000Frequency (MHz)Attenuation
26、(dB/100ft) MaxRoomTempAG174AG174LLFIGURE 3: Maximum Attenuation Values Maximum attenuation values for Hz not shown may be may be established by interpolation Frequency (MHz) AG174 Attenuation (dB/100ft) Max at room temp AG174LL Attenuation (dB/100ft) Max at room temp 50 7.5 4.6 100 10.5 7 500 24 15.
27、11 1000 32 25.71 1500 40 30 2500 56 35.4 3000 64 39.4 TABLE 3: Maximum Attenuation Maximum attenuation values for Hz not shown may be may be established by interpolation. SAE/USCAR-29 Issued January 2006 Automotive Grade Coaxial Cable Performance Specification - 7 - 5.2 Mechanical and Environmental
28、Test Requirements: Test Reference Method/procedure Requirement Aging Stability MIL C 17G 3.7.15 MIL C 17G 4.8.16* No cracks, flaws or other damage of the jacket. Cold bend MIL C 17G 3.7.18 MIL C 17G 4.8.19* No cracks, flaws or other damage of the jacket or dielectric core. Flame propagation SAE J112
29、8 SAE J 1128 6.6 Flame shall self extinguish in 70s Fluid resistance SAE J1128 J1128 Optional test: see 4.1.3 Maximum change in diameter per SAE J 1128 Abrasion resistance Sandpaper method ISO 6722 9.21(0.2kg additional mass) 125mm minimum length of sandpaper Center conductor elongation ASTM B3 ASTM
30、 B3 Annealed copper center conductor only: Conductor shall meet requirements as specified in ASTM B3. Requirements for all other center conductor materials shall be established by agreement between supplier and customer. Dielectric to center conductor retention USCAR/EWCAP See 5.2.1 The center condu
31、ctor shall withstand a 10N force without pulling out of the dielectric material. Shield to dielectric retention USCAR/EWCAP See: 5.2.2 The Shield shall withstand a 3N force without pulling off of the dielectric. Jacket to shield retention USCAR/EWCAP See 5.2.3 The outer jacket shall withstand a 22N
32、force without pulling off of the shield. Heat age stability MIL C 17G 3.7.15 MIL C 17G 4.8.16 No cracks, flaws or other damage of the jacket or dielectric core. 1 For the purpose of this test the resistance to abrasion shall be the minimum length the sandpaper must of travel without exposing the bra
33、id or shield. * Mandrel diameter for various tests shall be 5X finished cable OD. SAE/USCAR-29 Issued January 2006 Automotive Grade Coaxial Cable Performance Specification - 8 - 5.2.1 Fixture: A suitable plate with a round .0215”/.023” diameter hole (See figure 4) securely mounted in a tensile teste
34、r so as to allow the center conductor of the sample specimen to pass through the hole and be attached to the load application device. See figure 5. Procedure: From a suitable length of cable expose the center conductor by removing 2” (minimum) of jacket, shield and dielectric material. See Figure 6
35、A. Cut the cable to length so as to leave ” of dielectric material, shield and outer jacket on the end of the specimen. Place the center conductor through the hole in the fixture plate and apply a pull force at a rate of 10 “/minute (250mm/min). A minimum of 5 samples shall be tested. Acceptance Cri
36、teria: See 5.2, Dielectric to center conductor retention. 5.2.2 Fixture: A suitable plate with a round .0635”/.065” diameter hole (See figure 4) securely mounted in a tensile tester so as to allow the dielectric material to pass through the hole and be attached to the load application device. See fi
37、gure 5. Procedure: From a suitable length of cable expose the dielectric by removing 2” (minimum) of outer jacket and 1”(minimum) of shield material. See figure 6 B. Cut the outer jacket, shield, dielectric and center conductor so as to leave ” of outer jacket material on the end of the specimen. Fo
38、ld the exposed shield material back over the outer jacket material remaining on the specimen. Place the dielectric through the hole in the fixture plate and apply a pull force at a rate of 10 “/minute (250mm/min). A minimum of 5 samples shall be tested. Acceptance Criteria: See 5.2, Shield to dielec
39、tric retention. 5.2.3 Fixture: A suitable plate with a .0885”/.090” diameter hole (See figure 4) securely mounted in a tensile tester so as to allow the shield material to pass through he hole and be attached to the load application device. See figure 5. Procedure: From a suitable length of cable ex
40、pose the shield by removing 2” (minimum) of outer jacket. See figure 6 C. Cut the cable to length so as to leave ” of outer jacket material on the end of the specimen. Place the shielded portion of the specimen through the hole in the fixture plate and apply a pull force of 10 “/minute (250mm/min).
41、A minimum of 5 samples shall be tested. Acceptance Criteria: See 5.2, Jacket to shield retention. FIGURE 4: Typical Test Plate: Hole Size as Specified (Not to Scale) SAE/USCAR-29 Issued January 2006 Automotive Grade Coaxial Cable Performance Specification - 9 - FIGURE 5: Typical Tensile Test Apparat
42、us With Fixture (Not to Scale) A B C FIGURE 6: Typical Sample Prep (Not to Scale) SAE/USCAR-29 Issued January 2006 Automotive Grade Coaxial Cable Performance Specification - 10 - APPENDIX A INITIAL CERTIFICATION REQUIREMENTS No coaxial cable may be represented as being USCAR/EWCAR compliant unless c
43、onformance to all applicable requirements of this specification have been met and are documented. All samples tested must meet these requirements. CONTINUING CONFORMANCE REQUIREMENTS 4.3 Outer jacked Diameter 4.3 Shield diameter 4.3 Dielectric Diameter 4.3 Inner conductor diameter 5.1 Characteristic
44、 impedance 5.1 Rf Insertion loss (attenuation) 5.1 Return loss Note: The continuing conformance requirements shall be detailed in the control plan. Documentation requirements shall be established by agreement between supplier and customer. SAE/USCAR-29 Issued January 2006 Automotive Grade Coaxial Ca
45、ble Performance Specification - 11 - APPENDIX B DEFAULT TOLERANCE TABLE Ref: USCAR 2 Values in this table are applicable only when specific dimensions or tolerances are not specified. Temperature 30C Voltage 5% Current 5% Resistance 5% Length 5% Time 5% Force 5% Frequency 5% Flow Rate 5% Relative Hu
46、midity 5% Volume 5% Mass 5% Mandrel diameter 5X nominal OD SAE/USCAR-29 Issued January 2006 Automotive Grade Coaxial Cable Performance Specification - 12 - APPENDIX C REVISIONS This specification was approved by USCAR/EWCAP on 8-1-05 Any revisions since that date have been incorporated into the specification. Revisions that altered the content of the specification are recorded below. Date Section Summary of Changes made Notes
