Vibration and Fatigue Criteria in the Design of Television Transmission Antennas

It is expected that a fatigue and vibration assessment will become part of the required criteria used to design television transmission antennas. The following is a presentation of an analysis of representative single top mounted UHF/VHF pylon style antenna designs using the approach currently found in CSA-S37-18 Annex N [1]. The key design details examined are the slotted areas, holes, and the base flange/base flange attachment. These results for vibration and fatigue are compared with those using the current strength based approach to show the effects on antenna design in terms of the diameters and lengths, as well as the types of materials and types of details allowed.