| Home |
| Search |
| Today's Posts |
|
#11
|
|||
|
|||
|
Richard,
What in the world are you babbling about???? Nothing I wrote conflicts with Terman or Balanis. Did you see a ghost message from me that I did not write? 73, Gene W4SZ Richard Harrison wrote: Gene, W4SZ wrote: "Do you have a reference to an analytic treatment using the traveling wave model that could give results comparable to NEC2?" NEC2 must agree with reality else it is worthless. Terman agrees with Balanis and is only wrong when theory is revoked. Terman says on page 866 of his 1955 edition: "A wire antenna is a circuit with distributed constants; hence the current distribution in a wire antenna that results from the application of a localized voltage follows the principles discussed in Chap. 4, and depends upon the antenna length, measured in wavelengths; the terminations at the ends of the antenna wire; and the losses in the system. The current distribution is also affected by the ratio of wire length to diameter in situations where the antenna is unusually thick. (see Kraus, Schelknoff, and Friis) Under most circumstances, the losses are sufficiently low and the ratio of wire length to diameter sufficiently great so that to a first approximation the current distribution can be taken as that for a line with zero losses; it then has the characteristics discussed in Sec. 4-5." Sec. 4-5 is titled: "The Effect of Attenuation on Voltage and Current Distribution - Lossless Lines" This is in Chapter 4, "Transmission Lines". Best regards, Richard Harrison, KB5WZI |
| Thread Tools | Search this Thread |
| Display Modes | |
|
|
Similar Threads
|
||||
| Thread | Forum | |||
| Lumped Load Models v. Distributed Coils | Antenna | |||
| Current in antenna loading coils controversy | Antenna | |||
| Eznec modeling loading coils? | Antenna | |||