yeah resistive mixer is good for transmitter , i was wondering to have high moderate power HEMT and use it , this can be also a choice , what do u think about it
i am using now NE4201s01 , which is a samll signal HJFET , so it can't ne used in high input power like o dbm and so
any resomendation , i am doing this in my master work
I've actually used the NE3210/4210 many times and had good luck in the 1-12 GHz range.
I've not had luck going with larger FETS and achieving better linearity... although i can't explain why... it is probably just a flaw in my implementations.
I've also been disappointed with the resistive mixers I've tried with avago enhancement mode discrete fets... again, not great implementations might be to blame.
I've used them in RX and TX designs. If you've got cases that are inherently good frequency plans for spurious you can do a lot with a single ended resistive fet mixer. I tried to build a singly balanced one once and failed, not sure what mistake I made but it was many years ago.
the main issue is when using the NE4201 as acctive mixer , it give a very good gain , in the samll signal
but as the IF signal is high , the gain drops alot , and the mixer becomes passive
what do u recommed ,gate or drain pumped mixer
i will try to design a ressitive one , and update u