You can now help support WorldwideDX when you shop on Amazon at no additional cost to you! Simply follow this Shop on Amazon link first and a portion of any purchase is sent to WorldwideDX to help with site costs.
The Feb 2025 Radioddity Giveaway Results are In! Click Here to see who won!

Reply to thread

Message

"i think i see what you mean with regards to ANY antenna having only ONE design frequency."

a single antenna length can be resonant at more than one frequency.

example: a quarter wave @ 9Mhz. is 3/4 wavelength @ 27Mhz., a quarter wave @ 27Mhz. is 3/4 wavelength @ 81Mhz., a quarter wave @ the upper end of the 2M. band is 3/4 wavelength @ 440Mhz..

"the one point where it has a 1:1 match AND is also resonant, meaning zero reactance."

the frequency at which an L/C circuit is resonant has nothing whatsoever to do with impedance or matching between the line and the feedpoint. an L/C circuit is resonant at a given frequency or frequencies regardless of the VSWR.

your supposition is flawed & incorrect.

[QUOTE="freecell, post: 151148, member: 30"] "i think i see what you mean with regards to ANY antenna having only ONE design frequency." a single antenna length can be resonant at more than one frequency. example: a quarter wave @ 9Mhz. is 3/4 wavelength @ 27Mhz., a quarter wave @ 27Mhz. is 3/4 wavelength @ 81Mhz., a quarter wave @ the upper end of the 2M. band is 3/4 wavelength @ 440Mhz.. "the one point where it has a 1:1 match AND is also resonant, meaning zero reactance." the frequency at which an L/C circuit is resonant has nothing whatsoever to do with impedance or matching between the line and the feedpoint. an L/C circuit is resonant at a given frequency or frequencies regardless of the VSWR. your supposition is flawed & incorrect. [/QUOTE]

Top Bottom