Fig. 7From: Frequency Modulation and Absorption Improvement of THz Micro-bolometer with Micro-bridge Structure by Spiral-Type AntennasReal and imaginary parts of effective permeability (a) and permittivity (b) as a function of frequency for micro-bridge structure coupled with spiral-type antenna with two separate linear antennas when n = 1.6 and i = − 2Back to article page