RadioBanter - View Single Post - Front-to-back ratio for UHF antenna

Bert Hyman · July 2nd 07, 07:02 PM posted to rec.radio.amateur.antenna,alt.tv.tech.hdtv

(szilagyic) wrote in
ups.com:

I think I understand what the front-to-back ratio is, but the specs
on my Winegard PR-8800 (8 bay bowtie) show negative front-to-back
ratios (-9 dB @ ch 14; -17 dB @ ch 32; -11 dB @ ch 50; -9 dB @ ch
69). The "dB over reference dipole" is: 10.7 dB @ ch 14; 12 dB @
ch 32; 11 dB @ ch 50; 12.5 dB @ ch 69. How can the front-to-back
ratio be negative, and is this good or bad? I am assuming this
could be bad in my case as I would like the signal at the back of
the antenna to be minimal.

Showing the F/B ratio as negative is non-standard, but I -guess
they're just trying to emphasize that the signal received off the
back of the antenna is less than that received from the direction
it's pointing.

Anyway, if that's not the case, you could always mount the antenna
backward :-)

--
Bert Hyman | St. Paul, MN |