This technology is a thin antenna that combines a printed dipole array on one side of a substrate with an artificial magnetic conductor (AMC) pattern consisting of CSRR and SRR resonators on the other, forming multiple beams via a beamforming network such as a Butler matrix. Each dipole balun is bent at 90 degrees to ensure it does not pass over the SRR.
In wearable and handset devices, limited space often requires linear antennas to be bent near metal components, leading to poor input impedance matching and increased return loss. Existing EBG mushroom structures require a large surface area and struggle to reduce the Specific Absorption Rate (SAR) when in contact with the human body.
This technology uses an artificial magnetic conductor to make the metal ground plane act as an in-phase reflection surface, maintaining stable impedance matching and radiation patterns even when placed against metal or the human body. It simultaneously reduces electromagnetic waves directed toward the body to lower SAR and supports beam steering via a beamforming network. Applicable to smartwatches, wearable communication devices, and metal-housed terminals, it provides high-quality wireless links with beam steering while meeting user safety standards.
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