I have heard tales of cyrogenic LNA with NF below 1 dB.
-Original Message-
From: Brian Webster
Sent: Thursday, July 12, 2018 5:43 PM
To: 'AnimalFarm Microwave Users Group'
Subject: Re: [AFMUG] How to count amplifiers in link budget
Also keep in mind in the cellular world they used
] On Behalf Of Adam Moffett
Sent: Thursday, July 12, 2018 4:00 PM
To: af@af.afmug.com
Subject: Re: [AFMUG] How to count amplifiers in link budget
Good to know.
On 7/12/2018 3:30 PM, ch...@wbmfg.com wrote:
> 3dB NF is nothing to crow about these days. Lots of front ends and
> preamps are belo
: [AFMUG] How to count amplifiers in link budget
Understood. This is 700mhz A-Block, so I'm allowed 1000W ERP in one
direction and 30W ERP in the other. I hadn't thought it through yet
when I talked about amping the 30W side.
My thinking was to use the higher power channel for downlink. I'm
looking
hursday, July 12, 2018 2:16 PM
To: af@af.afmug.com
Subject: Re: [AFMUG] How to count amplifiers in link budget
But he said he gets 30 ERP not 30 EIRP where EIRP = 1.64 * ERP ( if he
is actually allowed 30 ERP and not 30 EIRP ). So that would be 49.2
EIRP IF he is allowed 30 _ERP_.. so 49.2
Of Robert Andrews
Sent: Thursday, July 12, 2018 2:16 PM
To: af@af.afmug.com
Subject: Re: [AFMUG] How to count amplifiers in link budget
But he said he gets 30 ERP not 30 EIRP where EIRP = 1.64 * ERP ( if he
is actually allowed 30 ERP and not 30 EIRP ). So that would be 49.2
EIRP IF he
is 37 dBm. So 44.7 - 37 = 7.7 dB gain.
A 7.7 dBi antenna is pretty common.
After adding antenna gain, I don't see much room to amplify.
-Original Message- From: Adam Moffett Sent: Thursday, July
12, 2018 11:06 AM To: af@af.afmug.com Subject: [AFMUG] How to count
amplifiers in link
antenna gain, I don't see much room to amplify.
-Original Message- From: Adam Moffett Sent: Thursday, July 12,
2018 11:06 AM To: af@af.afmug.com Subject: [AFMUG] How to count
amplifiers in link budget
I'm looking at an IoT application where we're allowed 30W ERP. The
transmitter is 5W
I read that as the 5w was with antenna. Chuck is correct. 7dbm antenna and
you are good to go.
On Thu, Jul 12, 2018 at 10:33 AM Jason Wilson
wrote:
> 44dbm is your target. You are at 37dbm now. 8dbm amplifier should take
> care of any cable loss.
>
> On Thu, Jul 12, 2018 at 10:08 AM Adam
44dbm is your target. You are at 37dbm now. 8dbm amplifier should take
care of any cable loss.
On Thu, Jul 12, 2018 at 10:08 AM Adam Moffett wrote:
> I'm looking at an IoT application where we're allowed 30W ERP. The
> transmitter is 5W, so even with antenna gain I have room to amplify that.
To: af@af.afmug.com
Subject: [AFMUG] How to count amplifiers in link budget
I'm looking at an IoT application where we're allowed 30W ERP. The
transmitter is 5W, so even with antenna gain I have room to amplify that.
How do you count an amplifier in your link budget? Just add the amp's
tx
I'm looking at an IoT application where we're allowed 30W ERP. The
transmitter is 5W, so even with antenna gain I have room to amplify that.
How do you count an amplifier in your link budget? Just add the amp's
tx gain and subtract connectors, or is there more to it than that?
Strangely
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