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On 10 May, 14:41, (Richard Harrison) wrote:
Art wrote: "For my interest, what is the unit that must be used for front to back ratio of a directive antenna?" I must be an idiot for venturing an answer, but ratios can be just numbers, but numbers have origins. If radiated power in one direction is twice that in another (reference), we can say it has a directive gain of two or we can say it has a 3 dB gain. Front to back ratios have the same origins and units. For legitimacy, Terman says on page 871 of his 1955 opus: "The directive gain can be expressed either as a power ratio, or in terms of the equivalent number of decibels. Best regards, Richard Harrison, KB5WZI So it is now the norm not to cancel units of measurement in physics? Woe is me. Free speech takes on a new meaning for some but not acceptable from others meaning a term for a formula can now be called a ratio with units of one's choice. Still, this is amateur radio after all, it does not have to follow professional standards as most was learned in the CB era |
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