rabi2014
Newbie level 2
![QQ截图20141224171716.jpg QQ截图20141224171716.jpg](https://www.edaboard.com/data/attachments/49/49079-b2985eb0b383c9cba34b8896baeb257b.jpg)
I want to design a log-periodic monopole antenna above the metal ground that can cover 2GHz-6GHz.
I want using coupling microstrip lines and electric wall as the feeder to simple the feed network.
Problem:
I have the problem of this idea. Its return loss is very bad. how to resolve it? anybody know how to reslove this problem.