How about some indication of what you hope to achieve I use a skelol slot I made on .70cm with great success and have used a refletor with good gain on a vertical in the past for a null B
fyi http://www.patentstorm.us/patents/5477224/claims.html To: Repeater-Builder@yahoogroups.com From: kc7...@hotmail.com Date: Fri, 9 Oct 2009 23:25:31 +0000 Subject: [Repeater-Builder] Re: feeding two 120 degree sector antennas LOL thanks for your honesty. I am sure someone here can help with my questions. Oh BTW I have have not slept at a Holiday Inn Express either :) those are funny and creative commercials too. 73 Matthew KC7EQO --- In Repeater-Builder@yahoogroups.com, "Chuck Kelsey" <wb2...@...> wrote: > > Actually Jeff Depolo is much better versed to explain this than I am. > Hopefully he can enter into this thread. I don't have an engineering > background, and don't play an engineer on TV. I haven't even stayed at a > Holiday Inn Express :-) > > Chuck > WB2EDV > > > > ----- Original Message ----- > From: "Matt" <kc7...@...> > To: <Repeater-Builder@yahoogroups.com> > Sent: Friday, October 09, 2009 6:55 PM > Subject: [Repeater-Builder] Re: feeding two 120 degree sector antennas > > > > Thanks for replying Chuck. The antennas are not perfectly back to back. > > More like 60 degrees from each other. > > > > I would have thought I'd have a null in one direction. Is there a better > > way to do this? > > > > I want close to the 11 dB gain my omni has, but with more down tilt. > > > > Thanks, > > > > 73 > > > > Matthew > > KC7EQO > > > > --- In Repeater-Builder@yahoogroups.com, "Chuck Kelsey" <wb2edv@> > > wrote: > >> > >> Are the two antennas pointed the same direction? If they are back to > >> back, > >> I'd guess that your results are what I'd expect. > >> > >> Chuck > >> WB2EDV > >> > >> > >> > >> ----- Original Message ----- > >> From: "Matt" <kc7eqo@> > >> To: <Repeater-Builder@yahoogroups.com> > >> Sent: Friday, October 09, 2009 2:29 PM > >> Subject: [Repeater-Builder] feeding two 120 degree sector antennas > >> > >> > >> >I am experimenting with some 3 Ghz antennas. I have a 2 way power > >> >divider > >> >feeding two 120 degree sector antennas rated at 15 dBi each. I have a 11 > >> >dBi omni that I am comparing it too. It seems the omni is getting better > >> >performance then the array is. I am seeing more than a 4 dB difference, > >> >loss. My goal is to get more down tilt in my antenna pattern, as the > >> >sectors offer a mechanical down tilt. > >> > > >> > Am I doing something wrong? > >> > > >> > I am feeding the antennas with LMR400 and feed is short as possible. > >> > Each > >> > feed from the divider is 15 inches long to the antenna. The insertion > >> > loss > >> > in the divider is <0.4 dBi according to the spec sheet. > >> > > >> > Thanks in advance, > >> > > >> > Matthew > >> > > >> > > >> > > >> > ------------------------------------ > >> > > >> > > >> > > >> > Yahoo! Groups Links > >> > > >> > > >> > > >> > > > > > > > > > > ------------------------------------ > > > > > > > > Yahoo! Groups Links > > > > > > > > > _________________________________________________________________ Take a peek at other people's pay and perks Check out The Great Australian Pay Check http://clk.atdmt.com/NMN/go/157639755/direct/01/
