Characterization of the ear-to-ear propagation channel using microstrip dipole antennas

A planar dipole antenna for on-body channel propagation study has been designed. It operates at center frequency of 2.45 GHz. The antenna has an integrated balun on the same substrate, which makes its impedance and radiation performance less susceptible to the presence of a human body. The path gain between two identical antennas is measured as a function of their position on the human head. These results are verified by numerical simulations where a precise model of human head is implemented. The results are analyzed and discussed

Ultra-Miniature Dual-Band Antenna Based on Subwavelength Resonators on LiNbO3 Substrate

© 2018 Institution of Engineering and Technology.All Rights Reserved. The common effect of subwavelength resonators and a high-permittivity lithium niobate substrate is used for deep-subwavelength miniaturization of a dual-band S/C-band monopole antenna. The resulting size is just about 1/18th of a wavelength for the lower band.status: accepte

Scalable conformal array for multi-gigabit body centric wireless communication

In this work a conceptual design of a conformal antenna array is presented for a millimeter-wave antenna system, optimized for low-cost mass production in PCB technology. The conformal array is constituted by four cube faces with two antennas realized on each face. A printed circuit board (PCB) laminate material was chosen for developing this integrated 60 GHz antenna solution. The beamforming capabilities of the 1 × 8 antenna array were validated using similar array topology but at frequency of 17.2 GHz. The proposed array enables the formation of a steerable high gain beam, significantly compensating the channel loss or shadowing in body area network (BAN), thus offering more robust, higher speed performance. The array topology is easily scalable and the antenna gain up till 12.2 dB is reachable. On one side such high gain combined with an agile beam steering is a significant power saving solution for RF front-end. On the other side a use of 60 GHz frequency band makes the antenna array extremely small and thus easily embeddable into wearable medical or commercial devices