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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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