Marlon do you have a list or single access to all these little articles you have written. Or do you just hand them out when you find it helpful.
Steve Barnes Manager PCS-WIN RC-WiFi Wireless Internet Service Character cannot be developed in ease and quiet. Only through experience of trial and suffering can the soul be strengthened, vision cleared, ambition inspired, and success achieved. - Helen Keller -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Marlon K. Schafer Sent: Friday, December 11, 2009 10:46 AM To: WISPA General List Subject: Re: [WISPA] Yagi vs. Grid? http://www.odessaoffice.com/wireless/antenna/how_to_pick_the_right_antenna.htm Take a look at the antenna patterns in there. A yagi is actually a very nice antenna. Much better than a grid as far as MOST of the antenna pattern goes. I like panels better because they tend to be even better yet. You can't get too big with a yagi. For lots of gain you need a grid or dish. When Mike says grids leak he's talking about the RF not water (though that can happen too). laters, marlon ----- Original Message ----- From: "Mike" <[email protected]> To: "WISPA General List" <[email protected]> Sent: Friday, December 11, 2009 7:31 AM Subject: Re: [WISPA] Yagi vs. Grid? > It's harder to get as much gain out of a Yagi as you can out of a > parabolic antenna. > > Both a grid and Yagi can suffer from ice loading. A Yagi can be > encased in a radome to eliminate that hazard. > > Most grids I've seen leak horribly. That is, they tend to spew RF > out the back because of the grid spacing. They still have the > forward gain, but spew to the rear. > > When world hams were preparing for the launch of P3D, a lot of > experiments were going on in 2.4G because one of the transponders > used that band. The front to back ratio issues were solved by > covering the grid with a finer mesh. > > A Yagi, compared to the grid has a better front to back ratio, but > has more pronounced side lobes and other minor lobes. > > I know you were asking about comparisons between a Yagi and a > Grid. 2.4G, it depends on what you are doing. 5.8G, a solid dish > with a radome wins every time; font to back ratio, side lobes, and > the radome seals from ice, snow, hornets and decreases the wind load > because of the Bernoulli effect. > > mg > > > At 09:18 AM 12/11/2009, you wrote: >>Any benefit of generally using a yagi over a wire grid or vice versa for a >>CPE install? >> >> >> >>Robert West >> >>Just Micro Digital Services Inc. >> >>740-335-7020 >> >> >> >> >> >>-------------------------------------------------------------------------------- >>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/
