ABSTRACT
This chapter provides individuals planning a terrestrial broadcast transmission system with the information needed to select and install the appropriate transmission lines to connect transmitters and receivers to their associated antennas. To be practical from a manufacturing and system design perspective, the standard transmission line characteristic impedances for commercially available coaxial transmission line products is 50 ohms or 75 ohms. In general, amplitude modulation, frequency modulation, and very high frequency television generally use 50-ohm transmission lines. The goal in the design of any transmission line system is to transfer the energy from the transmitter to the antenna with a minimum of power loss. Transmission lines are rated for both their peak and average power-handling capabilities, and both are required to fully describe the capabilities of a given transmission line size. The peak power rating of a given transmission line is limited by the voltage breakdown value between the inner conductor and the outer conductor.
