Improvement of Radiation Gain from Inductive Stubs in Non-reciprocal CRLH Metamaterial Lines

In this paper, we propose to extend the length of inductive stubs in nonreciprocal composite right/left-handed metamaterial lines by inserting capacitors into the stubs to improve the radiation gain from the stubs. It is confirmed from the numerical simulation results that the radiation gain from the stubs was enhanced, compared to the conventional structures.