University of Oulu

Sowpati, A.K., Nelo, M., Varghese, J. et al. Journal of Elec Materi (2018) 47: 3957.

Approach to fabricate rigid substrate for 2.4 GHz inverted-F antenna using a room temperature curable dielectric ink on photo and nanopaper

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Author: Sowpati, Arun Kumar1; Nelo, Mikko1; Varghese, Jobin1;
Organizations: 1Microelectronics and Materials Physics Laboratories, Faculty of Information Technology and Electrical Engineering, University of Oulu, P.O. Box 4500, 90014 Oulu, Finland
2Fiber and Particle Engineering Unit, Faculty of Technology, University of Oulu, P.O. Box 4300, 90014 Oulu, Finland
Format: article
Version: accepted version
Access: open
Online Access: PDF Full Text (PDF, 2 MB)
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Language: English
Published: Springer Nature, 2018
Publish Date: 2019-05-11


The effect of a room temperature curable dielectric ink (ZrSiO₄) printed on commercial photo paper and prepared nanopaper on the dielectric properties at 2.4 GHz are studied. In both cases, the dielectric layer decreased the relative permittivity and dielectric loss and made the flexible substrates rigid. For the nanopaper, the permittivity decreased from 4.7 to 3.57 and the loss value from 0.12 to 0.04. The measured decreases for the photo paper were from 3.12 to 2.61 and from 0.09 to 0.05, respectively. In the performance of the simulated and fabricated inverted-F antennas, the effect of the dielectric layer could be observed in the decrease of its frequency with about 130 MHz mainly due to the thicker substrate. The measured total efficiency and gain were 83% and 3.4 dB. The proposed approach could be in the future used for further development of the antenna by modification of the dielectric ink with different additives.

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Series: Journal of electronic materials
ISSN: 0361-5235
ISSN-E: 1543-186X
ISSN-L: 0361-5235
Volume: 47
Issue: 7
Pages: 3957 - 3962
DOI: 10.1007/s11664-018-6278-6
Type of Publication: A1 Journal article – refereed
Field of Science: 216 Materials engineering
213 Electronic, automation and communications engineering, electronics
221 Nanotechnology
Copyright information: © 2018 The Minerals, Metals & Materials Society. This is a post-peer-review, pre-copyedit version of an article published in Journal of Electronic Materials 47:7. The final authenticated version is available online at: