RE: [amsat-bb] S-Band dish feed

["Simon Lewis" <simon@xxxxxxxxxxxxxxxxxxxxxx>]

For purists it might!

In reality does not make much difference at all!

Regards

Simon GM4PLM

-----Original Message-----
From: owner-AMSAT-BB@AMSAT.Org [mailto:owner-AMSAT-BB@AMSAT.Org] On
Behalf Of Bob Bruninga
Sent: 10 November 2001 16:28
To: amsat-bb@AMSAT.Org
Subject: [amsat-bb] S-Band dish feed


I notice that the AIDC D/C uses a rectangular subreflector behind the
feed dipole..  But since it is a rectangle, aligned with the dipole,
then the sides of maximum dipole lobe has the "minimum" reflector ground
plane in that direction... hummh...

Would the more conventional circular sub reflector do any better?  Of
course the circular one is usually because it is behind a circular feed,
and this is linear...   But my real question is "would it hurt?".

For sturcutural purposes I need a circular piece of metal there instead
of the rectangle and just wonder if it would hurt...

de WB4APR@amsat.org, Bob

PCsat WEB  page     http://www.ew.usna.edu/~bruninga/pcsat.html
ISS-APRS FAQ:       http://www.ew.usna.edu/~bruninga/iss-faq.html
CUBESAT Designs     http://www.ew.usna.edu/~bruninga/cubesat.html
APRS LIVE pages     http://www.ew.usna.edu/~bruninga/aprs.html
APRS SATELLITES     http://www.ew.usna.edu/~bruninga/astars.html
MIM/Mic-E/Mic-Lite  http://www.toad.net/~wclement/bruninga/mic-lite.html

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