Analysis of 3D metamaterial with μ = −1 for magnetic field focusing

A cuboid metamaterial unit cell with μ = −1 is presented. A periodic configuration consisting of the proposed 3D unit cell is realized for magnetic field focusing application. The unit cell of subwavelength consists of capacitor loaded planar printed rings on each face of cuboid of dimension 15×15×16mm3. The unit cell is designed by considering the effect of capacitor's tolerance on the resonant frequency. A flat lens of 270×270×16mm3 made of 18×18×1 periodic array of proposed unit cells is fabricated and tested. The fabricated flat lens exhibits magnetic field focusing at 64MHz with an improvement of 10dB when compared to the power without the flat lens. The measured results are in good agreement with simulated results.