Aperture-coupled wearable antenna with miniature feeding network

An aperture-coupled wearable antenna with a miniature feeding network is proposed. In wearable systems, it allows to minimize the dimensions of the rigid Printed Circuit Board (PCB) carrying the electronics and feeding the textile antenna, optimizing the comfort of the user. Simultaneously, it avoids probe feeding, that requires a single soldering point that has a huge risk of being broken with time due to user movements. Since the aperture is implemented on the PCB, it can be fabricated with excellent tolerances. The antenna achieves a miniature feeding network with dimensions of 10 × 10 mm2 (0.0817 × 0.0817 λ02 at 2.45 GHz), while maintaining a good performance in the ISM band. Simulations and experiments agree well, validating the functioning of the antenna.

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