Studies on two closely-packed L-shaped slot antennas

It is found that a pair of closely-packed L-shaped slot antennas can exhibit both low mutual coupling and reflections at same frequency without any additional element or structure in between or around. The influence of several parameters is studied in terms of mutual coupling and reflection coefficient. Simulation results show that the range of low mutual coupling and reflections in frequency domain can be mainly controlled through the length of slot arms. A design guideline is proposed as a consequence of the study. And it is validated by simulation in large frequency range.