archiv~1.txt: SETI RE: Argus: RF Attenuation

SETI RE: Argus: RF Attenuation

n6tx@setileague.org
Sat, 13 Mar 1999 12:29 -0500

----Original Message-----
>From: "Adrian W Kingsley-Hughes" <awk-h@dolwar.demon.co.uk>

>Just a quick question - how much does kinks and bends in a coax affect its
>performance?

Every coax manufacturer has a spec for minimum bend radius for each type of cable. For Belden 9913, for example, the minimum radius bend is something like 6 inches. Bending sharper changes the characteristic impedance of the cable in that area, inducing reflections (i.e., raising VSWR).
See Chapter 5 of the ARRL UHF/Microwave Experimenter's Handbook for more details.