milansedlak
Newbie level 4
Hi,
I need help with this "problem".
I have device A, which has 50 ohm output port (900 MHz). I also have antenna with 50 ohm input. So There is no problem.
Now, I wanna make a new device "blackbox". Input of the blackbox should be matched to the 50 ohms (so there is no problem with reflected power into the device A), but output port of the black box should have different impedance (20+10j). So basically, S11 of the blackbox should be -30 db (matched) and the S22 of the blackbox should be - 7 dB.
I've basic LC matching network. But (as you know) I can do S22 = -7 dB, but S11 also equals to - 7 dB.
Do you have any ideas how I can do this black box? So there is no reflected power into the device A and also there is mismatched output for the Antenna? :sad:
Thank you
I need help with this "problem".
I have device A, which has 50 ohm output port (900 MHz). I also have antenna with 50 ohm input. So There is no problem.
Now, I wanna make a new device "blackbox". Input of the blackbox should be matched to the 50 ohms (so there is no problem with reflected power into the device A), but output port of the black box should have different impedance (20+10j). So basically, S11 of the blackbox should be -30 db (matched) and the S22 of the blackbox should be - 7 dB.
I've basic LC matching network. But (as you know) I can do S22 = -7 dB, but S11 also equals to - 7 dB.
Do you have any ideas how I can do this black box? So there is no reflected power into the device A and also there is mismatched output for the Antenna? :sad:
Thank you