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Computer model experiment
On 5/10/2010 12:35 PM, Art Unwin wrote:
I just completed a experiment with my antenna optimizer program where I had a dipole in free space and where I increased the diameter until it was close to.003 ohms resistive What this means is the current flow is right at the surface where there is no skin depth penetration involved and thus close to zero material resistance. This means that the total resistance is the radiation resistance of the surface encapsulating particles. The radiation was 35 db in a shape close to that of a sphere. (when the resistance of the aluminum dipole went to zero the radiation went to a perfect sphere) Efficiency was stated at 100% efficient pointing to 100% accountability for all forces involved and where losses were at a minimum. Regards Art What program would this be? I would like to try and duplicate your results, as would others here. tom K0TAR |
#2
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Computer model experiment
On May 10, 8:21*pm, tom wrote:
On 5/10/2010 12:35 PM, Art Unwin wrote: I just completed a experiment with my antenna optimizer program where I had a dipole in free space and where I increased the diameter until it was close to.003 ohms resistive What this means is the current flow is right at the surface where there is no skin depth penetration involved and thus close to zero material resistance. This means that the total resistance is the radiation resistance of the surface encapsulating particles. The radiation was 35 db in a shape close to that of a sphere. (when the resistance of the aluminum dipole went to zero the radiation went to a perfect sphere) Efficiency was stated at 100% efficient pointing to 100% accountability for all forces involved and where losses were at a minimum. Regards Art What program would this be? *I would like to try and duplicate your results, as would others here. tom K0TAR Great, tho most people on the group have yet to learn about antenna programs preferring to procede by intuition. Choose a dipole suitable for a particular frequency in FREE SPACE. Increase diameter incrementaly in the order of 1000 inches or so. Plot radiation field Continue until impedance drops to much less than 1 ohm (I dropped to about .003 ohms) Plot radiation pattern and compare change from donut to sphere shape of pattern and compare results. What to expect. Radiation will increase as impedance decreases. Maximum radiation will occur when the dipole impedance drops to zero and the particle skin becomes the sole resistance of the composite dipole. The radiation pattern will reflect point radiation within the cosmos. Note some programs provide an impedance in negative terms. It is better that impedance stays positive to determine all trends. |
#3
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Computer model experiment
On 5/10/2010 8:44 PM, Art Unwin wrote:
On May 10, 8:21 pm, wrote: On 5/10/2010 12:35 PM, Art Unwin wrote: I just completed a experiment with my antenna optimizer program where I had a dipole in free space and where I increased the diameter until it was close to.003 ohms resistive What this means is the current flow is right at the surface where there is no skin depth penetration involved and thus close to zero material resistance. This means that the total resistance is the radiation resistance of the surface encapsulating particles. The radiation was 35 db in a shape close to that of a sphere. (when the resistance of the aluminum dipole went to zero the radiation went to a perfect sphere) Efficiency was stated at 100% efficient pointing to 100% accountability for all forces involved and where losses were at a minimum. Regards Art What program would this be? I would like to try and duplicate your results, as would others here. tom K0TAR Great, tho most people on the group have yet to learn about antenna programs preferring to procede by intuition. Choose a dipole suitable for a particular frequency in FREE SPACE. Increase diameter incrementaly in the order of 1000 inches or so. Plot radiation field Continue until impedance drops to much less than 1 ohm (I dropped to about .003 ohms) Plot radiation pattern and compare change from donut to sphere shape of pattern and compare results. What to expect. Radiation will increase as impedance decreases. Maximum radiation will occur when the dipole impedance drops to zero and the particle skin becomes the sole resistance of the composite dipole. The radiation pattern will reflect point radiation within the cosmos. Note some programs provide an impedance in negative terms. It is better that impedance stays positive to determine all trends. And the program you are using is? tom K0TAR |
#4
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Computer model experiment
Increase diameter incrementaly in the order of 1000
inches or so. As stated earlier the above is a gross violation of the segment length/diameter ratio. Again; what does your "Average Gain Test" report say under these conditions? Frank |
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