Sánchez-Marín, JR.; Bachiller Martin, MC.; Juliá Morte, M.; Nova-Giménez, V.; Esteban González, H.; Boria Esbert, VE. (2018). Microwave Filter based on Substrate Integrated Waveguide with Alternating Dielectric Line Sections. IEEE Microwave and Wireless Components Letters. 28(11):990-992. https://doi.Abstract-A new topology of microwave filter based on Substrate Integrated Waveguide (SIW) with alternating dielectric line sections is presented in this paper. The two alternating sections are waveguides without and with dielectric material acting, respectively, as the inverters and the resonant sections of the proposed filter. This topology allows to easily design and manufacture compact filters with lower losses and higher rejection band than other available SIW realizations. For validation purposes, a prototype of a 4-pole bandpass filter, based on alternating dielectric line sections, has been designed and manufactured, including successful experimental results.Index Terms-Substrate Integrated Waveguide (SIW), planar structure, filter, alternating dielectric line sections.

In this work, continuous health monitoring for disabled or elderly people is proposed using textile integrated electrodes for ECG measurement. Other applications, such as EMG or skin impedance measurement are also envisaged. The paper specifically describes a shirt integrating electrodes for ECG measurement that has been tested in several conditions. The techniques for integration of ECG electrodes can be directly applied for production of EMG or skin-impedance electrodes. Signal processing techniques for heart rate value extraction and to deal with low-quality signal or motion artefacts are being tested and will also be described. Results show that signals acquired with the shirt are comparable to signals acquired with conventional gel electrodes. The complete integration of the electrodes into clothing may have a very interesting psychological benefit, but some issues related to comfort and daily use have to be further investigated.

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