Author |
Message |
Jallenbo
New registered user

Joined: 07 Apr 2009 Posts: 7

|
|
Power dividers and gain |
|
Let's say you have an antenna with 5 dB gain. If you wanted to stack this in a 2 bay the theory is that gain would be increased by 3 dB totalling 8 dB of gain (or 4 bay with 11 dB gain).
But isn't there an insertion loss of 3 dB in a 2 way splitter (and 6 dB in a 4 way splitter) since input power is equally divided between the ports? Wouldn't that mean that the total amount of ERP don't increase? Am I missing something here?
|
|
Sun Nov 12, 2017 10:21 am |
|
 |
pcs
Site master


Joined: 18 Jan 2002 Posts: 3074 Location: Radio Land |
|
|
|
The "gain" comes from resulting radiation pattern which is more directional as you add more and more elements.
If these were yagis and you were to turn each antenna in its own direction so the signals would go separate ways than there would indeed be 3dB reduction for each of the two signals.
_________________ Best regards,
Marko - PCS Electronics
--------------------------------------------------------
Turn your PC into a FM radio station!
http://www.pcs-electronics.com
fax +386 4 2316 128 |
|
Mon Nov 13, 2017 4:01 pm |
|
 |
|
|
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
|