I have to wonder if some of the client radios may be pointed at sidelobes rather then the main beam. One thing you see between the two antennas published patterns is the lack of pronounced sidelobes on the teletronics.
Regards Michael Baird > Gain only comes from narrowing coverage with antennas. > > If there are both 120* antennas you can't have HIGHER gain with GREATER > coverage.... It takes half the coverage area go give you twice the power > (3DB of gain). > > http://www.odessaoffice.com/wireless/antenna/how_to_pick_the_right_antenna.htm > > laters, > marlon > > ----- Original Message ----- > From: "Michael Baird" <[email protected]> > To: "WISPA General List" <[email protected]> > Sent: Sunday, June 28, 2009 2:32 PM > Subject: Re: [WISPA] Antenna Performance > > > >> Not ,the same downtilt angle, same percentage as the old one. The >> previous antenna was a Tranzeo 16db w/6 degree vertical, the Teletronics >> 19db has a 8 degree vertical actually larger VB then the 16db at 6. They >> are both at .3 degrees downtilt. The only reason I mention the VSWR is >> because the teletronics VSWR is 1.1:4, vs 1.5 on the Tranzeo. The >> Teletronics is down about 6db on the CPE side for all the clients on the >> test sector, on the AP side it's the same. I tested multiple tilt's as >> well, between 0-1 degree was the best on the CPE side. >> >> Regards >> Michael Baird >> >>> First thing that comes to my mind reading your post is that you installed >>> a >>> higher gain antenna which means your vertical beam is going to be >>> narrower >>> (sometimes higher gain is not always better). Being that you installed >>> the >>> antenna with the same down tilt angle your missing the mark because you >>> have >>> a narrower vertical beam. >>> >>> As for the VSWR nothing really considered too low. If your VSWR is higher >>> then 1.5:1 then you have a problem for sure. >>> >>> Personally never used or tested TT's 15-124 antenna but have sold a few >>> of >>> them with no complaints on it as far as I know. >>> >>> -----Original Message----- >>> From: [email protected] [mailto:[email protected]] On >>> Behalf Of Michael Baird >>> Sent: Sunday, June 28, 2009 8:33 AM >>> To: WISPA General List >>> Subject: [WISPA] Antenna Performance >>> >>> I picked up a Teletronics 15-124 19db horizontal antenna for testing and >>> deployed it in place of a Tranzeo 16db Horizontal (TilTek?), using same >>> pigtail and radio. With the clients on this sector, the AP side is the >>> same, but the CPE receive side seems to have suffered with this larger >>> antenna. Nothing was changed other then the antenna, aimed to the exact >>> same degree, tilted the same percentage of vertical tilt, and so forth. >>> I'm thinking the antenna isn't very good, or it's VSWR is too low and >>> I'm getting some power reflected from the antenna. Anybody have >>> experience with this antenna, or these scenarios? >>> >>> I expected this bigger, more expensive antenna to gain all across the >>> board. >>> >>> Regards >>> Michael Baird >>> >>> >>> ---------------------------------------------------------------------------- >>> ---- >>> WISPA Wants You! Join today! >>> http://signup.wispa.org/ >>> ---------------------------------------------------------------------------- >>> ---- >>> >>> WISPA Wireless List: [email protected] >>> >>> Subscribe/Unsubscribe: >>> http://lists.wispa.org/mailman/listinfo/wireless >>> >>> Archives: http://lists.wispa.org/pipermail/wireless/ >>> >>> >>> >>> >>> -------------------------------------------------------------------------------- >>> WISPA Wants You! Join today! >>> http://signup.wispa.org/ >>> -------------------------------------------------------------------------------- >>> >>> WISPA Wireless List: [email protected] >>> >>> Subscribe/Unsubscribe: >>> http://lists.wispa.org/mailman/listinfo/wireless >>> >>> Archives: http://lists.wispa.org/pipermail/wireless/ >>> >>> >> >> -------------------------------------------------------------------------------- >> WISPA Wants You! Join today! >> http://signup.wispa.org/ >> -------------------------------------------------------------------------------- >> >> WISPA Wireless List: [email protected] >> >> Subscribe/Unsubscribe: >> http://lists.wispa.org/mailman/listinfo/wireless >> >> Archives: http://lists.wispa.org/pipermail/wireless/ >> > > > > -------------------------------------------------------------------------------- > WISPA Wants You! Join today! > http://signup.wispa.org/ > -------------------------------------------------------------------------------- > > WISPA Wireless List: [email protected] > > Subscribe/Unsubscribe: > http://lists.wispa.org/mailman/listinfo/wireless > > Archives: http://lists.wispa.org/pipermail/wireless/ > -------------------------------------------------------------------------------- WISPA Wants You! Join today! http://signup.wispa.org/ -------------------------------------------------------------------------------- WISPA Wireless List: [email protected] Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
