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Electromagnetic Field Theory by Yaduvir Singh

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10

Wave Guides

10.1 INTRODUCTION

A transmission line guides electromagnetic (EM) energy from one point (generator point) to another point (load point). A “wave-guide” has a similar function. However, wave guide fundamentally differs from a transmission line. Wave guides are special cases of transmission lines. Table 10.1 summarizes the distinction between transmission line and a wave guide.

 

Table 10.1 Comparison between a transmission line and wave guide

Sl No. Transmission Line Wave Guide
1.
It supports the transverse electromagnetic wave (TEM) only It supports many possible configurations
2.
Due to the “skin effect” and higher dielectric losses, especially in frequency range 3–300 GHz, the transmission line becomes inefficient ...

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