Both options use a T.
The circulators prevent impedance mismatch/return loss problems with
reflections.
If you just use a T, there will be some frequencies that will be notched
out. That all has to do with the length of the cables.
If you use circulators, most of the reflections will be eliminated.
No, the cable lengths will be immaterial. But I would couple the T to the
circulators without cable if possible, so buy circulators and Tees that can
be directly connected.
Or, a bicone antenna...
-----Original Message-----
From: Dan Petermann
Sent: Thursday, September 01, 2016 1:46 PM
To: af@afmug.com
Subject: Re: [AFMUG] Diplexer or combiner
Ok, now I�ve confused myself.
Option 1: run both antennas into a T.
Option 2: feed the appropriate antenna into the circulators, put a dummy
load on the unused port(s), and then into the T. Is that correct?
Do I need to worry about cable lengths from the antennas?
On Sep 1, 2016, at 1:36 PM, Dan Petermann <d...@wyoming.com> wrote:
I think this will do the job.
Thank you very much for your help!
I really want one of these
(http://www.aaronia.com/products/antennas/IsoLOG-3D/) but the boss thinks
that 18K is a bit much.
On Sep 1, 2016, at 12:02 PM, Chuck McCown <ch...@wbmfg.com> wrote:
I see the dilemma, not finding diplexers or splitters with the correct
specs.
So, a simple T would do the job.
A bit of an impedance mismatch and possibly some suck outs at certain
frequencies.
A pair of circulators feeding a T with dummy loads for the reflected
energy would be better.
One of these:
https://www.fairviewmicrowave.com/sma-circulator-17-db-isolation-4-8-ghz-sfc4080b-p.aspx
One of these:
https://www.fairviewmicrowave.com/sma-circulator-16-db-isolation-2-4-ghz-sfc2040a-p.aspx
A SMA T and two SMA 50 ohm loads.
-----Original Message----- From: Dan Petermann
Sent: Thursday, September 01, 2016 11:36 AM
To: af@afmug.com
Subject: Re: [AFMUG] Diplexer or combiner
I need to feed a single coax from 2 antennas (1-3.65 and 1-5.xGHz),
receive only (spectrum analyzer).
On Sep 1, 2016, at 11:15 AM, Chuck McCown <ch...@wbmfg.com> wrote:
Do you have transmit and receive all the the same circuit?
Waveguide or coax?
Are you going into a dual freq antenna or two antennas?
Need a clearer picture.
-----Original Message----- From: Dan Petermann
Sent: Thursday, September 01, 2016 11:09 AM
To: af@afmug.com
Subject: [AFMUG] Diplexer or combiner
Does anyone know where I can find a diplexer that can combine the 3.65 &
5.7GHz bands?
I need one in the within 3 weeks.
<Diplexer.PNG>
