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Roy Lewallen, W7EL wrote:
"The mathematical treatment in King is quite complex. But nowhere does he mention any traveling, reflected, or standing current, power, or energy waves, or that inductance behaves any differently in an antenna than in a lumped circuit.." Maybe something was overlooked. The above is just more squid ink. Kraus characterizes inductors as helices. At one extreme they are stretched into straifht wires. At the other they collapse into single loops. After years of wrangling it is time to admit that the old authors are right. King and Wing were associates at Harvard. Alexander H. Wing wrote on page 3 of "Transmission Lines, Antennas, and Wave Guides": "5. Distributed constants - The Transmission line cannot be analyzed as a simple series circuit, because the current in the wires is not everywhere the same." J.D. Kraus wrote on page 185 of his 1950 edition of "Antennas": "Thus, a helix with circumference too small for the axial mode of radiation (circumferennce less than 2/3 wavelength) has a nearly sinusoidal current distribution, caused by alternate reinforcement and cancellation of two oppositely directed traveling waves on the helix of nearly equal amplitude Izero as suggested in Fig. 7-13c. Both traveling waves are of the Tzero transmission mode type." I expedct no one will throw in the towel, but do expect more squirts of squid ink. Best regards, Richard Harrison, KB5WZI |
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