PCS Electronics PCS Electronics - home page PCS Electronics  
RegisterSearchFAQAM & FM Radio transmitters shop UsergroupsLog in
Stacked FM dipole

 
Reply to topic    PCS-Electronics Forum Index » Antennas View previous topic
View next topic
Stacked FM dipole
Author Message
Ken
New registered user
New registered user


Joined: 28 Mar 2003
Posts: 8

Post Stacked FM dipole Reply with quote
I woner wich stacked dipole give me the higest gain, most output power?

I wanna stack 4 dipoles, max 1kW transmitter.

Alt 1. http://www.pcs-electronics.com/stacked-single-dipole-antenna-p-327.html

Alt2. http://www.pcs-electronics.com/stackable-circular-dipole-antenna-p-1481.html

And if I use Alt 2, what "splitter" do I use for the antennas?
Sat May 02, 2009 10:39 am View user's profile Send private message
pcs
Site master
Site master


Joined: 18 Jan 2002
Posts: 2940
Location: Radio Land
si.gif

Post Reply with quote
Hi there,

it depends what polarization you prefer.
If you're OK with vertical only, vertical dipoles will give best results.

Those antenas that are in horizontal or other orientation will
experience some loss of signal compared to those in vertical.

Some prefer circular polarization as it covers both vertical
and horizontal antennas equally, however the gain is smaller than with
vertical polarization at the transmitter and receiver.

Google it up, I suck at explaining this.

Many small stations just use vertical polarization. Big stations
often use circular. You can use the same combiners for both antenna
types listed.

_________________
Best regards,
Marko - PCS Electronics
--------------------------------------------------------
Turn your PC into a FM radio station!
http://www.pcs-electronics.com
fax +386 4 2316 128
Sat May 02, 2009 9:40 pm View user's profile Send private message Visit poster's website
Ken
New registered user
New registered user


Joined: 28 Mar 2003
Posts: 8

Post Reply with quote
Thanks Marco, I will Google for more info.

But if I choose circular antennas, what antenna splitter, harnest cable do you rekomend when I use four antennas. In other words what more than the four antennas and the coax from transmitter do I need.
Sun May 03, 2009 12:06 pm View user's profile Send private message
pcs
Site master
Site master


Joined: 18 Jan 2002
Posts: 2940
Location: Radio Land
si.gif

Post Reply with quote
Use the harness that is listed under that vertical dipole.
You have either 2-way or 4-way splitter.

_________________
Best regards,
Marko - PCS Electronics
--------------------------------------------------------
Turn your PC into a FM radio station!
http://www.pcs-electronics.com
fax +386 4 2316 128
Sun May 03, 2009 1:20 pm View user's profile Send private message Visit poster's website
pcs
Site master
Site master


Joined: 18 Jan 2002
Posts: 2940
Location: Radio Land
si.gif

Post Reply with quote
I just spoke to a guy who works with these antennas a lot, some very usefull hints:

1. Vertically polarized dipoles: Best range, worst multi-path problems (reflected and
direct wave interfering

2. Horizontally polarized dipoles: wonderful for solid coverage of immediate
area close to the antenna tower, less range than vertical polarization.

3. Reduces the problem of multipath (see point 1 for vertical dipoles).
But requires more power for same range.

It would appear circular is the best, but also the most expensive solution as you
require more power to cover same range.

What is the problem of multipath? You can have lots of signal at some point,
but reception will still break-up due to interference of two signals.

Hope this helps.

_________________
Best regards,
Marko - PCS Electronics
--------------------------------------------------------
Turn your PC into a FM radio station!
http://www.pcs-electronics.com
fax +386 4 2316 128
Sat May 09, 2009 5:17 pm View user's profile Send private message Visit poster's website
Display posts from previous:    
Reply to topic    PCS-Electronics Forum Index » Antennas All times are GMT + 1 Hour
Page 1 of 1

 
Jump to: 
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Powered by phpBB © 2001, 2005 phpBB Group