There is indeed a pre-amp installed close to the antenna, there is however
no need for switching there since it has an integrated bypass controlled by
a Bias-Tee. The installation of the antenna (VHF/UHF crossed yagi-Uda) and
pre-amps etc is already done since many years ago.
The RX and TX frequen
With the B210’s noise figure, you’re going to want a pre-amp in the line near
the antenna anyway.
It is worth considering how you want to do that plumbing.
With my 10GHz transceivers, I run independent RX and TX lines up to the feed.
The preamp takes the beating (though the isolation on my
Thanks everyone for your input. Transmitting and receiving will be on the
same frequency. I'm leaning towards using the ZFLM-252-1WL-S+ power limiter
as Kent Torell suggested to keep down the number of active components.
Best regards,
Martin Elfvelin
On Mon, Apr 19, 2021 at 11:33 PM Marcus D Leec
Basically like many things in the analog RF world, there are a plethora of ways
to “plumb” this type of stuff.
Sent from my iPhone
> On Apr 19, 2021, at 5:56 PM, brendan.horsfi...@vectalabs.com wrote:
>
>
> OK, that makes sense.
>
> Note that a double-junction circulator can give even high
OK, that makes sense.
Note that a double-junction circulator can give even higher isolation, e.g.
40-50 dB.
___
USRP-users mailing list -- usrp-users@lists.ettus.com
To unsubscribe send an email to usrp-users-le...@lists.ettus.com
I was thinking a switch would get moved to the RX port of the circulator, which
would see the TX power reduced by 20dB. Then into a switch that switched the RX
port of the circulator between a 50 ohm load and the RX port.
Sent from my iPhone
> On Apr 19, 2021, at 5:13 PM, Brendan Horsfield
>
Martin, Marcus,
I don't see how adding a circulator will protect the Rx port of the USRP
without blocking the signal from the CubeSat as well.
Are you transmitting and receiving on different frequencies? If so, you
could insert a filter between the Rx port and the switch to block the Tx
frequenci
On 04/19/2021 09:49 AM, Martin Elfvelin wrote:
Thank you for your input. Do you suggest adding a circulator to the
system or rather replacing the switch with a circulator?
Best regards,
Martin
I'd say add a circulator in addition to your switch.
On Mon, Apr 19, 2021 at 3:43 PM Marcus D Leech
Thank you for your input. Do you suggest adding a circulator to the system
or rather replacing the switch with a circulator?
Best regards,
Martin
On Mon, Apr 19, 2021 at 3:43 PM Marcus D Leech
wrote:
> A circulator can give you an additional 20dB isolation.
>
> Putting 5d!m into the RX2 port wi
A circulator can give you an additional 20dB isolation.
Putting 5d!m into the RX2 port will likely destroy the RX amplifier in the
AD9361.
Sent from my iPhone
> On Apr 19, 2021, at 9:12 AM, Martin Elfvelin via USRP-users
> wrote:
>
>
> Hello all,
>
> I am planning on using a USRP B200 i
10 matches
Mail list logo
