Fig. 6

Distribution of electric field energy density, magnetic field energy density, and power loss. Energy density diagrams of electric field (a) and magnetic field (b) for spiral-type antenna on the support layer when n = 1.6; energy density diagrams of electric field (c) and magnetic field (d) for spiral-type antenna with a single separate linear antenna when n = 1.6 and i = − 2; energy density diagrams of electric field (e) and magnetic field (f) for spiral-type antenna with two separate linear antennas when n = 1.6 and i = − 2; power loss distribution in the micro-bridge structure coupled with spiral-type antenna with two separate linear antennas when n = 1.6 and i = − 2 from top view (g) and side view (h)