rhyando
Newbie level 4
Hello.
I've made an bandpass filter in schematic and the frequency responce is good (left picture in attachment pic) Spec = f0=145.95 MHz, BW = 20 MHz, Type:butterworth.
But when i simulate the transmission line as shown in the pic in right side with fr4, er=4.2, thickness=1.6mm, dan tand=0.02. I get frequency shifting in ADS simulation. Why is this happen ? what can i do to minimize the transmission line effect in ADS ?
can anyone help me ?
thanks.
I've made an bandpass filter in schematic and the frequency responce is good (left picture in attachment pic) Spec = f0=145.95 MHz, BW = 20 MHz, Type:butterworth.
But when i simulate the transmission line as shown in the pic in right side with fr4, er=4.2, thickness=1.6mm, dan tand=0.02. I get frequency shifting in ADS simulation. Why is this happen ? what can i do to minimize the transmission line effect in ADS ?
can anyone help me ?
thanks.