2.4GHZ uplink to 10Ghz downlink Satellite

 2.4Ghz to 10Ghz Satellite transponder

I am thinking of building a  2.4Ghz up link to 10Ghz Down link  Satellite Transponder 

10Ghz Up-link and 2.4Ghz down link or the 2.4Ggz up link and 10Ghz down

Up-link 2.4 to 10Ghz can reasonably easy be done with SDR (pluto using first harmonic on output for 10Ghz)

I wanted to do it with SDR and was looking for reasonably priced Full duplex TX/RX SDR and was looking at the Pluto Plus SDR

see details here for using Python to controller the Pluto

https://pysdr.org/content/pluto.html

Looking at the Band Plan at 2.4Ghz

 

It seems we have about it seems we can use the band from about 2320Mhz up to 2400Mhz

 10Ghz Band Plan

 and on the 10Ghz Band 10Ghz up to 10.500Ghz

So 2.4Ghz uplink and 10Ghz downlink could easily be done with pluto plus and raspberry pi 3 using Gnuradio using the first harmonic on 5Ghz

 

10Ghz Micro strip Band pass filter

installing qusc-rflayout

cd

git clone https://github.com/thomaslepoix/Qucs-RFlayout.git
cd Qucs-RFlayout/
ls
mkdir build
cd build
cmake ../
make
sudo make install

see if it works by running it

qucsrflayout

 Create the netlist using the following command (input file output file)

sudo qucs -n -i "/usr/share/qucs/examples/microstrip.sch" -o "/usr/share/qucs/examples/microstrip.net"

Ground station equipment same as QO-100

Creating pcb

Using the Qusc-RFlayout utility to create the pcb from design 

select your sch file and click read

Then select the output folder at the bottom and select write to create the kicad pcb file

Open the kicad_pcb file in kicad

Here is the curve simulated on Qucs

Band pass section

Installing qucs from this url https://github.com/thomaslepoix/Qucs-RFlayout

1) Qty 10 of the Mini Circuits SXBP-150+  filter

2) Qty 2 of the Mini Circuits ZX60-06183LN+ amp

Here is the circuit diagram of my 10 Ghz RF amp design

Simulating the rf Stub  (3.9mm 90deg)

1/4 wave stub at 10ghz

 

Ref :using micro strip calculator Qucs