Calculation of capacitance of transmission lines

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SUMMARY

The capacitance of transmission lines is defined as the charge per unit potential difference between conductors, which presents complexities due to varying charges on individual wires. To accurately calculate capacitance in transmission lines, one must refer to established electromagnetic principles found in textbooks such as "Field and Wave Electromagnetics" by David K Cheng. The discussion emphasizes the importance of understanding different configurations, including parallel plates and coaxial lines, to derive relevant formulas for capacitance.

PREREQUISITES
  • Understanding of basic electromagnetic theory
  • Familiarity with transmission line theory
  • Knowledge of capacitance concepts in electrical engineering
  • Access to "Field and Wave Electromagnetics" by David K Cheng
NEXT STEPS
  • Study the derivation of capacitance formulas for parallel plates and coaxial cables
  • Explore the impact of conductor spacing on capacitance in transmission lines
  • Learn about the application of capacitance in transmission line modeling
  • Investigate numerical methods for calculating capacitance in complex conductor arrangements
USEFUL FOR

Electrical engineers, students in electromagnetic theory, and professionals involved in the design and analysis of transmission lines will benefit from this discussion.

ajith.mk91
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Capacitance between two plates is defined as the charge accumulated per unit potential difference between those plates. But in the case of transmission lines how can we define it? The potential difference any two conductors in a group of several conductors can be derived in terms of the charges on individual wires. But how can we calculate the capacitance because there is an ambiguity in this case. The charges on both the conductors are not the same!
 
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Perhaps this link will help:
http://www.tup.com.cn/Resource/tsyz/030533-01.pdf
 
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Well, thank you
 
You can look in one of those Engineering Electromagnetic Text book. They have a section on capacitance of different transmission lines like parallel plates, coax, parallel lines etc. You can study how they derive the formulas also. Good book would be "Fiend and Wave Electromagnetics" by David K Cheng.

This is too long to write it out here, it is like 5 to 6 pages of textbook.
 

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