freqzt
Advanced Member level 4
I've design a UWB microstrip antenna. The S parameter is ok, but the input impedance is not. The input impedace is not constant at the range of frequency that is between 3.1 - 10.6 GHz. When I design this antenna, I set the input impedance at 50 ohm. The simulation result show that the input impedance is oscillation between 30 - 80 ohm. Anyone know how to make the input impedance is around 50 ohm, if there is a deviation, it's just 5 ohm at the band 3.1 - 10.6 GHz. Should I make an impedance matching? How to make it? I fed the antenna using CPW. Thank you for your help.