O'Reilly logo

Power Vacuum Tubes Handbook, 3rd Edition by Jerry Whitaker

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

8Properties of Materials

8.1 Metals*

Metals serve many different functions in the realization of radio frequency (RF) and microwave devices, each of which results in different requirements that must be met. Thus, the optimum metal for each application will vary widely. Considerations include a wide range of electrical, mechanical, chemical, and thermal properties.

A first-order consideration in the choice of metals for many electrical applications is the electrical resistance of the metal conductor. DC resistance of a metal rod is given by

R=ρLA

8.1

where

  1. R is the resistance of the rod

  2. ρ is the resistivity of the metal

  3. L is the length of the rod

  4. A is the cross-sectional area of the rod

The dc electrical properties of metals are also ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required