National Association of Broadcasters Engineering Handbook, 11th Edition

Chapter9.4

Transmission Lines for AM, FM, HF, and TV Stations and Associated Systems

Phillip Young

Director of Quality Assurance,

Electronic Research, Inc.

Nicholas Paulin

Project Engineering Manager,

Electronic Research, Inc.

Bill Harland

Vice President of Marketing,

Electronic Research, Inc.

Introduction

There are three fundamental components to creating a high-power broadcast facility. Those three items are a transmitter, an antenna, and the transmission line that connects the transmitter to the antenna (Figure 9.4-1 and 9.4-2 show examples of transmission lines).

A transmitter’s purpose is to amplify a mixed RF signal from the exciter. The antenna radiates the amplified RF and produces a signal out to its viewers and listeners. This chapter ...