Two-layered ground radiation antenna for high efficiency applications

In this paper, a novel technique is proposed that is applicable to cases in which two-layered ground planes exist to achieve high radiation performance. The proposed ground radiation antenna is composed of a radiating loop and a feeding loop, which are built into separate two-layered ground planes. The feeding loop and radiating loop are located on the small top-layer ground plane and the large bottom-layer ground plane, respectively, so that two loops are magnetically coupled to each other, and the large bottom-layer ground plane is then excited as a radiator. The reference antenna is built with a radiating loop and a feeding loop only on the top-layer ground plane. High performances are achieved both in simulation and measurement.