Excerpt from A Helical Wave Guide II
In recent years a great deal of research has been done on an ultra-high frequency amplifier known as the traveling-wave It has been found that this tube possesses the desirable properties of high gain, broad bandwidth, and low noise level. The essential part of the tube is a helical transmission line which is designed to pass an electromagnetic wave with wave length along the guide, and hence phase velocity along the guide, smaller than that of the free-space wave by a factor of about thirteen. An electron beam with a velocity approximately equal to the phase velocity of the electromagnetic wave is shot down the center of the helical guide. The electromagnetic wave and the electron beam interact, and as a result the wave amplitude is magnified.
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This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
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Excerpt from A Helical Wave Guide II
In recent years a great deal of research has been done on an ultra-high frequency amplifier known as the traveling-wave It has been found that this tube possesses the desirable properties of high gain, broad bandwidth, and low noise level. The essential part of the tube is a helical transmission line which is designed to pass an electromagnetic wave with wave length along the guide, and hence phase velocity along the guide, smaller than that of the free-space wave by a factor of about thirteen. An electron beam with a velocity approximately equal to the phase velocity of the electromagnetic wave is shot down the center of the helical guide. The electromagnetic wave and the electron beam interact, and as a result the wave amplitude is magnified.
About the Publisher
Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com
This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
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HRD. Zustand: New. New Book. Shipped from UK. Established seller since 2000. Artikel-Nr. LX-9780260455581
Anzahl: 15 verfügbar