My system requires a 50 ohm input feed to a 30 ohm load. I am trying to design a coax adapter with the lowest possible mismatch...does anyone have any recommendations? Freq is 100MHz to 11GHz. Any help is appreciated.
Thank you..I was thinking a 1/4 transformer at first, but with the bandwidth I don’t know it will work. The min loss pad could be the only solution...6.5dB is ok. Any idea how to proceed with this? This is always in a coax structure. Thanks
Thank you..I was thinking a 1/4 transformer at first, but with the bandwidth I don’t know it will work. The min loss pad could be the only solution...6.5dB is ok. Any idea how to proceed with this? This is always in a coax structure. Thanks
You can calculate the resistance values here.. https://home.sandiego.edu/~ekim/e194rfs01/minl_atten/minlosatten.html
Then you should find a tubular mechanical part that is convenient for your coaxial connectors ( N-Type, SMA etc) After that, prepare a PCB that will fit into this mechanical tubular structure and choose the resistances in according with your Power Level and attenuation accuracy.This is hand-made solution.
There may be-I don't know- ready to use solutions from different manufacturers.
That is a big bandwidth. You can forget about a magnetic transformer, or quarterwave section.
You will need a broadband matching network.
But seriously, why do you care? That is a return loss of 12 dB. You can not take that sort of mismatch? If not, add a 2 dB attenuator pad in front of it, and the total return loss will now be 16 dB, and so on.