And I always suffer from gain envy. Must be why I've always used grids. Thanks for the info, I only have a few panels but they are 900mhz, thinking about trying some Arc panels though for 5 and 2.4 to see how they do.
Bob- -----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.h tm 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/
