Using Helmholtz resonator arrays to improve dipole transmission efficiency in waveguide

Wang Liwei¹, Quan Li², Qian Feng^{1, 3}, Liu Xiaozhou^{1, †}

Models of waveguides with different HRAs. (a) The first HR position of the HRAs is 2.5 mm, the period of the HRAs is 10 mm. (b) The first HR position of the HRAs is 7.5 mm, the period of the HRAs is 5 mm. (c) The first HR position of the HRAs is 12.5 mm, the period of the HRAs is 5 mm. (d) The first HR position of the HRAs is 7.5 mm, the period of the HRAs is 10 mm.