Salving
Member level 1
I'm designing microstrip patch antenna in cst mws.
At the beginning i used microstrip transmission line to feed the antenna. I needed to get good results and so i started to increase thickness of the substrate. But not only bandwidth got better, radiation efficiency did too. But i was supposed to get decreasing in efficiency due to theory.
Then i used coax probe feed. And again i got the same results - increasing subs thickness gave higher efficiency.
Please, anyone, help me to explain this problem.
i use fr4 subs, freq - 2 ghz.
At the beginning i used microstrip transmission line to feed the antenna. I needed to get good results and so i started to increase thickness of the substrate. But not only bandwidth got better, radiation efficiency did too. But i was supposed to get decreasing in efficiency due to theory.
Then i used coax probe feed. And again i got the same results - increasing subs thickness gave higher efficiency.
Please, anyone, help me to explain this problem.
i use fr4 subs, freq - 2 ghz.