You will always have diffraction effects. No way around it. Different spacing causes different effects. I would put it on the side of the tower that has the majority of the customers.
For certain 2 wavelengths. At 10 wavelengths most of the worst effects are gone. So 20 inches for 5 GHz. From: Ken Hohhof Sent: Thursday, March 10, 2016 1:35 PM To: af@afmug.com Subject: Re: [AFMUG] 5GHz Omni standoff I thought Chuck posted something awhile back about X many wavelengths, I suspect 2 ft should be fine at 5 GHz, but no matter what I assume you’ll lose some signal going through the tower. From: Jason McKemie Sent: Thursday, March 10, 2016 2:29 PM To: af@afmug.com Subject: Re: [AFMUG] 5GHz Omni standoff I'm not exactly sure how much standoff I need, I guess that is part of the question. On Thu, Mar 10, 2016 at 2:25 PM, Ken Hohhof <af...@kwisp.com> wrote: How much standoff do you need? I have used Andrew S200 like George says (2 ft standoff) or S300 (3 ft), actually they go up to 6 ft standoff. Or Connect-It Wireless S2-S6. Can be used on vertical or sloping tower legs. Sitepro1 also has several solutions, some of which are YUGE! From: Jason McKemie Sent: Thursday, March 10, 2016 2:02 PM To: af@afmug.com Subject: Re: [AFMUG] 5GHz Omni standoff I had looked at those, I just didn't know if it had enough standoff for use with an omni - from a shadowing perspective. On Thursday, March 10, 2016, Chuck McCown <ch...@wbmfg.com> wrote: Here is a good ‘un: http://www.mccowntech.com/24-inch-pipe-standoff/ From: Jason McKemie Sent: Thursday, March 10, 2016 12:00 PM To: javascript:_e(%7B%7D,'cvml','af@afmug.com'); Subject: [AFMUG] 5GHz Omni standoff Anyone have suggestions for a standoff mount for use with a 5GHz omni? It will be mounted to the side of a Pirod tower, so I'm going to need some sort of standoff to minimize shadowing. -Jason