Re: Do IMD figures for a PA change with bad antenna matches?
M0GVZ wrote:
SWR alone doesn't tell you the whole story. I'm sure Steve will confirm there are figures of R and X that would produce a low SWR but you'd not want to transmit into it.
I have a Panorama 5/8 wave VHF antenna that shows <2:1 SWR over about 30MHz but once you get more than 5MHz either side of the resonant point the performance nose dives.
If the complex impedance is close enough to 50 ohm so as to give one a reasonable VSWR, why wouldn't you want to transmit into 'it', and by 'it' I assume you are talking about an antenna and not some devilish device.