This paper reports a novel approach using an inductive loading to reduce the resonant frequency of a mushroom-shaped high impedance surface. The current path is extended on the mushroom-shaped structure's vias and additional traces, which introduces a three-dimensional inductor to the unit cell and leads to an increase in total inductance. As a result, the resonant frequency of the high impedance structure decreases, and a smaller unit cell size can be achieved at the low gigahertz frequency range. Finite element electromagnetic simulation, equivalent circuits modeling, and experimental measurements suggest the feasibility of the proposed approach.
Woo Seok Kim,
Sung Cheol Hong,
Sung Il Park,
"A Novel Approach Using an Inductive Loading to Lower the Resonant Frequency of a Mushroom-Shaped High Impedance Surface," Progress In Electromagnetics Research M,
Vol. 90, 19-26, 2020. doi:10.2528/PIERM19110607
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