jimway
Member level 1
I have to design a matching circuit of the low noise amplifier which operates at 434MHz.
I gained the S11 and S22 of the chip by measurement.
And then I designed the matching network through the S Parameter.
But the result shows that my design is quite poor.
The stripe whose Zc is about 70 ohm and length is 6 degree has benn under considered.
The chip is designed by myself so that i don't have any datasheet.
The PCB under test with and without matching circuit is the same one.
But the components I used haven't been verified to work under this band.
Can anyone help me or any suggestions?
I gained the S11 and S22 of the chip by measurement.
And then I designed the matching network through the S Parameter.
But the result shows that my design is quite poor.
The stripe whose Zc is about 70 ohm and length is 6 degree has benn under considered.
The chip is designed by myself so that i don't have any datasheet.
The PCB under test with and without matching circuit is the same one.
But the components I used haven't been verified to work under this band.
Can anyone help me or any suggestions?