Control of Vertical Radiation Patterns of TV Transmitting Antennas

This paper deals with the application of the principles presently employed in the design of directional antennas for the Standard Broadcast band to the control of radiation from TV transmitting antennas in order that optimum use is made of the energy radiated from such antennas. Until very recently TV antennas were designed primarily to concentrate the radiated energy in the direction of the horizontal plane and the greater this concentration the more desirable the antenna. During the past year the engineering profession has realized the importance of determining the nature of the area to be served by a given antenna system and then designing the antenna to cover this area most effectively with the power available. The need for such design is shown by several examples of problems already solved by this method and the general method of attack on the problem is developed in some detail.