want to finish with 50 ohm from behind microstrip antenna

hi

I have two questions

1) I want to finish with 50 ohm from behind microstrip antenna. How Can I finish the end of the mikrostrip antenna? I use lump port for finishing the end of the microstrip antenna. Is it true? I know that the lump port is a passive. Is ıt true?

2) I define the air bigger than antenna structure. Does air which is drawn for different lenghts on same structure lenghts change result?

thanks for your helps

Hi
1/ What kind of simulation software do you use, I suggest you use microstrip port if any.
2/ yes, but in the case you run many excited ports at the same time, for individual design, I dont think the length affects much on the S11

Hello,

Have you simulated the antenna? I've simulated with ANSOF a microstrip antenna over a perfect ground.