TY - JOUR AU - He, Changshan AB - In this paper, a novel meta‐grounded planar bandpass filter is presented, facilitating much broader upper stopband. The proposed filter is comprised of a strip layer on the top, a dielectric laminate in the middle and a meta‐grounding layer on the bottom. The strip on the top consists of three cross‐shaped resonators in cascade. Instead of perfect conducting ground, a meta‐ground, composed by a group of metallic mushroom lattices with different characteristic dimensions, is proposed for broadening the upper stopband. In order to validate the proposed concept, we design and fabricate a prototype filter with a center frequency of 11.6 GHz, which exhibits an extremely broad upper stopband from 17.6 GHz to 72.2 GHz with a rejection level greater than 20 dB. TI - Meta‐grounded bandpass filter with broad upper‐stopband JF - Microwave and Optical Technology Letters DO - 10.1002/mop.32781 DA - 2021-05-01 UR - https://www.deepdyve.com/lp/wiley/meta-grounded-bandpass-filter-with-broad-upper-stopband-D0Rn98VfkE SP - 1440 EP - 1444 VL - 63 IS - 5 DP - DeepDyve ER -