AbstractsEngineering

Since the dawn of electromagnetic propagation, men have for various reasons been striving for frequencies which drive higher and higher into the frequency spectrum. With the advent of these higher frequencies, other problems arose which were not encountered at lower orders of frequency. For instance, it became increasingly more difficult to contain power on transmission lines without encountering high losses at short wave lengths. Power radiating from an antenna was highly desired, but power, radiating from the transmission line which was feeding the antenna, was another question.