Pre requisit to study transmission lines and wave guides

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Discussion Overview

The discussion revolves around the prerequisites for studying transmission lines and waveguides, focusing on the necessary mathematical and theoretical background, particularly in electromagnetics and advanced mathematics.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant suggests that knowledge of vector algebra and vector calculus may not be sufficient, indicating that electromagnetics is essential for understanding waveguides.
  • Another participant shares their experience of studying transmission lines without a strong background in electromagnetics, emphasizing the importance of phasors and suggesting that it is possible to approach the subject from a practical perspective.
  • A different viewpoint is presented, where a participant mentions that while it is feasible to skip electromagnetics for practical applications in RF engineering, a solid understanding of the Smith Chart is crucial for working with transmission lines.
  • Recommendations for textbooks are made, including "Microwave Engineering" by David Pozar and "Radio Frequency and Microwave Electronics" by Matthew M. Radmanesh, with varying opinions on their accessibility and depth.
  • One participant reflects on their own educational journey, noting that despite initial success in RF design without a deep understanding of differential equations and electromagnetics, they later recognized the value of that knowledge.

Areas of Agreement / Disagreement

Participants express differing views on the necessity of electromagnetics for studying transmission lines and waveguides, with some advocating for its importance while others argue that practical experience can suffice. The discussion remains unresolved regarding the best approach to learning these topics.

Contextual Notes

There are varying assumptions about the depth of knowledge required in electromagnetics and mathematics, and the discussion highlights the potential gaps in understanding that may arise from different educational paths.

reddvoid
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what is pre requisit to study transmission lines and wave guides...?
I've studied vector algebra and vector calculus, is it enough or ?
 
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You need to study electromagnetics for this. You can study Tx line without EM like I did because it is all about phasors. If you accept the phasor concept without knowing how it comes from the solution of a differential equation, it is doable...I did it. Do you mean those TE waveguide? Waveguide is a different story, you really need to know EM, it is not even covered in undergrad EM class.
 


thanks a lot, this really helped :-)
 


You can always skip EM and higher math and get on with the electronics. That's what I did when I was a RF engineer. I just study the 2 port parameters, phasors, Smith Charts and did quite a bit of RF designs. When you deal with Tx lines, you really need to know the Smith Chart inside out. You learn to think in Smith Chart. All the impedance transformation, source and load matching, stability of the circuit are all done with Smith Chart. I used to joke about I am dancing on the Smith Chart.

Get the Microwave Engineering by David Pozar, it cover a lot of transmission line stuff you need. You can skip the first chapter of EM and just study it. Make sure you work with the Smith Chart...A LOT! I tried to "see" how the Smith Chart trace move with components in my head. In RF, you really do not "see" how the circuit behave like in the normal transistor or analog circuits you study in those transistor or op-amp books. It is like training yourself a different way of thinking and seeing. You'll be surprised a lot of RF engineer is not very good with Smith Chart and resort of copying application circuit given by the manufacturers.

If you find Pozar too hard, get the Radio Frequency and Microwave Electronics by Matthew M. Radmanesh. This is the easiest book I've seen to get you feet wet into RF and tx lines. Then you study Pozar.

But ultimately, you should go the hard way, study Differential Eq., EM. I actually studied ODE, PDE and EM afterwards and find out how much I missed even though I successfully designed in RF.
 
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