would the energy of a nearby SM alter the lobe pattern from the AP antenna On Tue, Sep 20, 2016 at 12:07 PM, Adam Moffett <dmmoff...@gmail.com> wrote:
> Good to know, thanks. > > In Canopy FSK I remember getting re-regs from people on the side of a > sector...seemingly regardless of how hot their RSSI was. In Wimax I > sometimes see fluctuations of 5-10db in the same circumstance. > > I guess I'm just reaching for explanations. > > > ------ Original Message ------ > From: "Chuck McCown" <ch...@wbmfg.com> > To: "Animal Farm" <af@afmug.com> > Sent: 9/20/2016 1:00:47 PM > Subject: Re: [AFMUG] Antenna side lobes...do they move much? > > > They would be rock solid if nothing is moving in the nearfield of the > antenna. However your particular antenna will have lobes in slightly > different positions and magnitudes. The plot you get is the antenna that > was hand tweaked and tested on the range. Production models vary a bit > from antenna to antenna. > > This is kind of like the pattern your headlights cast on your garage > door. You will see bands and irregularities on the edges of the light > pattern. They really don’t move but are a function of how the light was > sealed together. > > *From:* Adam Moffett <dmmoff...@gmail.com> > *Sent:* Tuesday, September 20, 2016 10:57 AM > *To:* Animal Farm <af@afmug.com> > *Subject:* [AFMUG] Antenna side lobes...do they move much? > > My question is about the polar plot for a sector antenna where you see > tiny lobes coming off it. Such as in between the rear lobe and the main > lobe there might be several tiny lobes. I've always thought RSSI was > unstable when you hit the sector from a weird direction like that. > > If I could see the radiation pattern in realtime would those lobes be > stationary or would they dance around a little? > > I'm just looking for an underlying reason for things I've seen in the > field, and maybe a real justification to use when I tell people not to do > that. > > > -- If you only see yourself as part of the team but you don't see your team as part of yourself you have already failed as part of the team.
