Need help of UHF circuit design

[Peterchoi]

Dear Friends,

Have anyone designed AM UHF transmitter and receiver which based on 409MHz carrier frequency by discrete component? Can you share you experience?
Or can you provide reference circuit?

Thank you very much!!
Best Regards,


Peter

 

[mostafamuslim]

for descrete components u can use s9018(ft=1.1ghz) or 2026 or BFR91(ft=6ghz) npn transistors

 

[Peterchoi]

Dear Mostafa,

Thank you very much for your reply,
I have find a circuit at the internet.

Do you think its work if I change the SAW into 409MHz?
If yes, does 409MHz SAW is a common component that can be buy?

Thank you very much again!!


Peter

 

[mostafamuslim]

i think that the SAW filters isused in the TV so u can use it
BUT Idonot know if u can buy it
uyou can ask in any electronic store market

 

[Peterchoi]

Dear Mr mostafa,

Thank you very much for your help


Peter