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On 20 Oct, 07:50, (Richard Harrison) wrote:
Mac, N8TT wrote: "It is difficult for me to see gain at the end of sn antenna wire." Miller effect works in a triode tube by placing a larger signal voltage on the plate than on its grid. This increases the difference in number of electrons between grid and plate. The charge of a capacitor is the difference in number of electrons on the two plates. But a capacitor doesnot radiate.....the hole is getting deeper ! At the open circuit end of a 1/4-wave antenna, the incident and reflected voltages are in-phase and equal in magnitude, thus doubling voltage at the antenna tip. This increased voltage doubles the charge at that point over that produced by the incident voltage alone as Q=CE. Mac is right. There is no mu factor in an antenna tip but there is a voltage and charge gain. Best regards, Richard Harrison, KB5WZI |
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