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Post subject: antenna feed cable pattern perturbation
Posted: Mon Feb 27, 2006 2:33 pm
Joined: Mon Feb 27, 2006
2:18 pm Posts: 1
Does anyone know a scheme to minimize scattering
from the feed coax of an antenna under test during
gain/pattern measurements? Frequency is 2.4 or 5.8
GHz. The problem is for configurations where the
coax cannot be oriented perpendicular to the incident
Post subject: Antenna feed scattering
Posted: Thu Mar 23, 2006 8:44 pm
Joined: Wed Feb 22, 2006
3:51 pm Posts: 104
Does it really make sense to make an
antenna measurement that has no connection to how
the antenna will actually function in the real world??
That said, you might consider the use of RF
absorbing material around the cable, to make it
appear to have the 377 Ohm impedance of free space.
Good Luck, Fred
Post subject: Antenna Feed cable Pattern Perturbation
Posted: Fri Mar 24, 2006 11:10 am
Joined: Fri Feb 17, 2006
12:07 pm Posts: 218 Location: London UK
This is a fairly old posting, but hopefully not
You could wrap the feeder cable
with strips of FM4 ferrite-loaded rubber sheet type
FM4 from Feriti.