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Old December 16th 05, 08:32 PM posted to rec.radio.amateur.antenna
Frank
 
Posts: n/a
Default Program GRNDWAV4

As I said, I do not have access to the many ancient, learned volumes
about radio transmission and antennas. Or to the many computer
programs.

But I do recall mention of "Effective Height" of vertical antennas
which has NOT been mentioned in the numerous prolonged threads on this
newsgroup about the relationship between receiver input power and
field strength.

What "Effective Height" means may be vague. But some sort of a
definition may be a clue to solving my problem. Don't mention
Marconi, Terman, Kraus, Balani, et al.,
----
Reg, G4FGQ


Repeating what was previously posted. The following model treats a 1 meter
(perfect conductor) monopole, of 0.814 mm diameter, connected to a perfectly
conducting ground. I have applied a vertically polarized incident E-field
of 1 V/m (peak). The base of the antenna is loaded with the antennas
complex conjugate of 1.747 + j823.796. NEC2 computes the current through
the load ast 0.2863 Amps (peak), which is 0.5001 V peak. This appears to
agree with Reg's program.

Possibly someone can point out if there are any errors in the following
code:

CM 1 Meter Vertical
CE
GW 1 50 0 0 1 0 0 0 0.000814
GS 0 0 1
GE 1
GN 1
EX 1 1 1 0 90 0 0 1 1 1
LD 4 1 50 50 1.747 823.796
FR 0 3 0 0 19.9 0.1
RP 0 181 1 1000 -90 90 1.00000 1.00000
EN

Regards,

Frank


 
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