RF characterization of flexible substrates for new conformable antenna systems

In this work, an electromagnetic characterization method using microstrip transmission lines to determine the dielectric properties of flexible substrates, such as papers or PET (Polyethylene Terephthalate), is proposed. Various metallization technologies (adhesive copper tape, screen printing, etched aluminum layer) have been tested to fabricate microwave circuits on these flexible substrates. Finally, patch antennas have been realized and measured to validate the experimental dielectric properties. The measured return loss is in good agreement with the simulation. This work is one first step further towards the development of new, green, low-cost, conformable printable antenna systems which may be sticken inside home-networking devices for wireless multimedia applications.

[1]  Giulia Orecchini,et al.  24-GHz CW radar front-ends on cellulose-based substrates: A new technology for low-cost applications , 2015, 2015 IEEE MTT-S International Microwave Symposium.

[2]  Pedro Pinho,et al.  Smart Surfaces: Large Area Electronics Systems for Internet of Things Enabled by Energy Harvesting , 2014, Proceedings of the IEEE.

[3]  Manos M. Tentzeris,et al.  Inkjet-printed antennas, sensors and circuits on paper substrate , 2013 .

[4]  Li Yang,et al.  RFID Tag and RF Structures on a Paper Substrate Using Inkjet-Printing Technology , 2007, IEEE Transactions on Microwave Theory and Techniques.

[5]  M.M. Tentzeris,et al.  Only Skin Deep: Inkjet-Printed Zero-Power Sensors for Large-Scale RFID-Integrated Smart Skins , 2013, IEEE Microwave Magazine.

[6]  Wenjing Su,et al.  Additively Manufactured Nanotechnology and Origami-Enabled Flexible Microwave Electronics , 2015, Proceedings of the IEEE.

[7]  R. Österbacka,et al.  Paper Electronics , 2011, Advanced materials.

[8]  A. Shamim,et al.  Inkjet Printing of Novel Wideband and High Gain Antennas on Low-Cost Paper Substrate , 2012, IEEE Transactions on Antennas and Propagation.

[9]  Giulia Orecchini,et al.  Communication and Sensing Circuits on Cellulose , 2015 .

[10]  A. J. Steckl,et al.  Circuits on cellulose , 2013, IEEE Spectrum.

[11]  G. Ponchak,et al.  Characterization of liquid crystal polymer (LCP) material and transmission lines on LCP substrates from 30 to 110 GHz , 2004, IEEE Transactions on Microwave Theory and Techniques.

[12]  Yunnan Fang,et al.  Inkjet catalyst printing and electroless copper deposition for low-cost patterned microwave passive devices on paper , 2013, Electronic Materials Letters.