An Optimal New Shielded Twisted Pair Model to Improve the Electromagnetic Immunity in the Automotive Applications

Penalver, C.M.; Marcos, J.; Lago, A.; Doval-Gandoy, Jesús; Nogueiras, A.; López, Oscar L.; Santiago, F.; Lorenzo, J.C.; Vilas, J.M.

doi:10.1109/isie.2007.4374731

Cited by 2 publications

(4 citation statements)

References 7 publications

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“…The characteristic impedance study is based on the results of laboratory tests, carried out using a large number of twisted pair samples [11], [12]. In the laboratory tests, the values of capacitance, inductance, and characteristic impedance for the types of twisted pair described above were measured.…”

Section: Improved Model Of Characteristic Impedancementioning

confidence: 99%

“…Increase in the capacitance value is described by the term C 3 , while the decrease in the inductance value L is modeled mostly by the coefficients d s and r s . The value of d c−s can be obtained from [12] and the value of ε eq−s can be calculated from…”

Section: Shielded Twisted Pairmentioning

confidence: 99%

“…Variables d sd , r sd , and μ rsd are obtained in the same manner as in Section III-C, whereas d c−sd is obtained based on [12], but applying a correction to the result. This correction value is necessary because the drain wire causes a variation in the shape of the shield.…”

Section: Shielded Twisted Pair With Drain Wirementioning

confidence: 99%

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Electrical Design Automation of a Twisted Pair to Optimize the Manufacturing Process

Lago

Penalver

Marcos

et al. 2011

IEEE Trans. Compon., Packag. Manufact. Technol.

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In the practical design of a transmission cable, the characteristic impedance and the number of twists per meter in twisted cables are variables that are dependent on imperative conditions, with the disadvantage that these variables are strongly depending to each other. Cable manufacturing companies aim to provide customers' products with very well known physical characteristics. For this reason, a methodology to achieve accurate design of twisted pair cables based on the geometry of wires, before going to the manufacturing process is very desirable. In a previous paper, the deformations and irregularities that can occur in the twisted pair during the manufacturing process and their effects on the geometry of the twisted pair were studied by the authors. This paper describes an improved model for estimating the characteristic impedance of a twisted pair that allows an accurate electrical design. Two methods for a fast design of a cable, in agreement with the demanded specifications (characteristic impedance or number of twists per meter) are developed. Furthermore, a software program that automates all necessary calculations has been made. Thanks to the improved model, the design and production of a cable can be done faster, without the need of a big set of production samples. Results showed in this paper are a part of a larger research project carried out in association with the research and development department of a cable manufacturing company, and these results are being applied into the design department of this company.

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Section: Improved Model Of Characteristic Impedancementioning

confidence: 99%

Section: Shielded Twisted Pairmentioning

confidence: 99%

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Electrical Design Automation of a Twisted Pair to Optimize the Manufacturing Process

Lago

Penalver

Marcos

et al. 2011

IEEE Trans. Compon., Packag. Manufact. Technol.

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“…During the last decades twisted pair is one of the most used signal transmission medium in automotive communication, even the appearance of most powerful medium as the optical fiber or coaxial cable can not achieve to banish it, in part due to the low manufacturing cost ofthe twisted pair, in part due to the improvement of its transmission characteristics that allow to increase the bandwidth [2]. An example of the twisted pair applications are the CAN-bus, which has become widely used Manuscript 978-1-4244-3504-3/09/$25.00 ©2009 IEEE because of its rapid response and high reliability.…”

mentioning

confidence: 99%

EMC comparison of unshielded twisted pair and shielded twist pair in automotive CAN-bus

Chen

Luo

et al. 2009

2009 IEEE Intelligent Vehicles Symposium

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EMC performance of transmission medium in real time on-board network is one of those important factors affecting the control property of the distributed system. Now twisted pair is the most commonly used transmission medium in vehicles. Twisted pair can be divided into shielded twisted pair and unshielded twisted pair. The difference between them is that the former one has a metallic tape which has some shielding effect. Theoretically shielded twisted pair should have better EMC performance, but in practical applications unshielded one may perform better. In order make a comparison of EMC performances for these two types of transmission medium used in automotive CAN-bus, firstly the paper develops testing plan and evaluation methods for EMC performance of twisted pair according to the existing standards. Then the testing plan is developed, afterwards test results are achieved and analyzed. Finally comparison is executed and suggestions of the selection of these two different twisted pair used in automotive CAN-bus are given.

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An Optimal New Shielded Twisted Pair Model to Improve the Electromagnetic Immunity in the Automotive Applications

Cited by 2 publications

References 7 publications

Electrical Design Automation of a Twisted Pair to Optimize the Manufacturing Process

Electrical Design Automation of a Twisted Pair to Optimize the Manufacturing Process

EMC comparison of unshielded twisted pair and shielded twist pair in automotive CAN-bus

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