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Roy Lewallen wrote:
Regards, Steve G3TXQ Yes, you would see this in the real world. EZNEC does a very good job of modeling a wire antenna with a loading coil, provided that you model the coil as a wire helix rather than lumped "load", and you can trust the results. As I've implied, a lumped load is quite a good model for a physically small, essentially non-radiating loading coil like a toroid on a magnetic core. Roy Lewallen, W7EL which makes perfect sense... NEC is a MoM code and is ideally suited to calculating the current induced in one wire by the currents in other wires. I should think it would do an excellent job modeling a air core solenoid, especially if the wire diameter is small compared to the spacing between turns,etc, assuming that you don't get into numerical precision problems. |
#2
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On Apr 23, 7:40*pm, Jim Lux wrote:
Roy Lewallen wrote: Regards, Steve G3TXQ Yes, you would see this in the real world. EZNEC does a very good job of modeling a wire antenna with a loading coil, provided that you model the coil as a wire helix rather than lumped "load", and you can trust the results. As I've implied, a lumped load is quite a good model for a physically small, essentially non-radiating loading coil like a toroid on a magnetic core. Roy Lewallen, W7EL which makes perfect sense... NEC is a MoM code and is ideally suited to calculating the current induced in one wire by the currents in other wires. I should think it would do an excellent job modeling a air core solenoid, especially if the wire diameter is small compared to the spacing between turns,etc, assuming that you don't get into numerical precision problems. If eznec does not take into account dielectric loading then the application is not in equilibrium and thus Maxwells laws are not applicable. Maxwells laws are based solely on the presence of equilibrium or accountability of all loads applied which when all are added equals zero per Newtons laws. Regards Art |
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