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
om] On Behalf 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
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
Yeah, I actually have 1000W ERP, my mistake.
On 7/12/2018 2:16 PM, Robert Andrews wrote:
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. watts would be
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. watts would be another 2.15
db.. 9.85 dbm gain antenna. Still no need for an amp...
Please check my math
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.
Yep, that is how you do it. 30 watts EIRP is 44.7 dBm
5 watts 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
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