The old saying “all changes are inseparable from their religion” applies to many things. Of course, it also applies to the problem of congestion in the electromagnetic spectrum. Just as the volume of gas continues to expand, new users will soon occupy new open areas of the radio spectrum. Since the radio age, the ability to use higher and higher frequencies has been limited only by existing technologies – first vacuum tubes and now semiconductors. Now, as then, the higher power transmission end of the communication equation controls the higher frequency. It is much more difficult to design components that work at high frequency and high power than to design low power. Capacitance, inductance, electron propagation time and voltage breakdown are the culprits. This 1945 article in radio news magazine discusses some problems that need to be overcome in order to easily expand television broadcasting to UHF band. In order to explore new markets and squeeze more income generating programs into the existing space, many industry forces are behind it. Somewhat unexpectedly, the emergence of cable television (CATV) thwarted the well-designed wireless broadcasting plan, and as history shows, UHF is eclipsed in the shadow of cable television.
Post time: Aug-05-2021