It’s not the antenna, it’s a probably quite powerful signal processor in MIMO WiFi chips dedicated to that function. WiFi would not be able to use MIMO without that function, since the antennas won’t have the polarizations lined up. In fact the streams probably won’t be on different polarizations but rather identified by spatial separation or different multipath.
I assume Cambium could build this into 450 but as a software defined radio it would probably require more signal processing horsepower than it would be worth? Whereas a radio built around an N or AC chip has the capability just sitting there in silicon begging to be used. From: Kurt Fankhauser Sent: Tuesday, March 17, 2015 8:24 PM To: [email protected] Subject: Re: [AFMUG] ePMP 2 GHz deployments That just boggles my mind. Why doesn't the 450SM work with both antenna types then? Why would a cheap $100 SM radio have a more sophisticated antenna design than a $250 FPGA radio? I can personally attest that you CAN NOT hook up a 2.4ghz 450 slant SM to an AP that's running a V/H antenna. Tried that with horrible results.... Kurt Fankhauser Wavelinc Communications P.O. Box 126 Bucyrus, OH 44820 http://www.wavelinc.com tel. 419-562-6405 fax. 419-617-0110 On Tue, Mar 17, 2015 at 9:20 PM, Mathew Howard <[email protected]> wrote: It works with any SM, there's nothing special about the antennas. On Tue, Mar 17, 2015 at 7:54 PM, Josh Luthman <[email protected]> wrote: Any SM or just the ones that were made to support slant? Josh Luthman Office: 937-552-2340 Direct: 937-552-2343 1100 Wayne St Suite 1337 Troy, OH 45373 On Mar 17, 2015 8:51 PM, "TJ Trout" <[email protected]> wrote: There was an explanation made that was over my head even with 20 years rf experience but basically the sm doesn't care sees them both the same strength and no compromise On Mar 17, 2015 4:35 PM, "Josh Luthman" <[email protected]> wrote: I'm curious to know what everyone is using for 2 GHz sectors. Primarily linear vs slant but also OEM vs aftermarket sectors. PS. I heard through the grapevines that the (integrated) CPEs can do slant and linear. Is this true? Is there no loss in signal regardless of your AP/Sector being 90*/45*? If the patch antenna can do both, doesn't that mean it isn't focusing on one or the other and had to compromise? Josh Luthman Office: 937-552-2340 Direct: 937-552-2343 1100 Wayne St Suite 1337 Troy, OH 45373
