Really depends on the antenna manufacturer.
Some use radomes that are tuned to only specific frequency ranges, so you will get more loss. Others, won’t sell feedhorns piece mail or if they do, will cost more than another 2ft antenna. A parabola is a parabola though for the most part. There is also concerns about side lobe suppression, but that is typically only with 6GHz antennas at the smaller diameters. As a rule of thumb though, most licensed antenna manufacturers discourage it, or outright “prohibit” it. Andrew prohibits it for instance, but we are getting creative to help Mark out of his situation. Daniel White | Managing Director SAF North America LLC Cell: (303) 746-3590 Skype: danieldwhite E-mail: <mailto:[email protected]> [email protected] From: Af [mailto:[email protected]] On Behalf Of Sam Lambie via Af Sent: Friday, December 5, 2014 9:09 AM To: [email protected] Subject: [AFMUG] 11 ghz dish, can one put an 18ghz feed horn in it? I was shipped the wrong antennas (2 foot) for an 18ghz link, I didn't notice that it was an 11 ghz antenna set until I tried to get the radios to link up. Best I could get was -65. It drove me crazy trying to see if I was on a side lobe for half an hour until it got dark and I gave up. Right before I left, I glanced at the label and saw that the antenna was for an 11 ghz link. So the question is, are the parabolics on the antenna the same and the feed horn different? Can it be swapped out to get me the -38 that I want, or are we going to have to uninstall the whole shebang? Sam -- -- Sam Lambie Taosnet Wireless Tech. 575-758-7598 Office www.Taosnet.com <http://www.newmex.com>
