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Flexible branch-line coupler using rubber conductive Zoflex for conformal application

Samingan, M .L. and Rahim, S. K. A. and Sabran, M. I. and Ramli, M. R. and Babale, S. A. (2017) Flexible branch-line coupler using rubber conductive Zoflex for conformal application. Microwave and Optical Technology Letters, 59 (8). pp. 1951-1955. ISSN 0895-2477

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Abstract

This letter presents the design of a flexible branch-line coupler (BLC) using a rubber conductor (Zoflex) as the conductive element and polydimethylsiloxane (PDMS) as a substrate. The BLC is meant to operate at 6 GHz operating frequency. The use of PDMS material as a substrate for the BLC design adds a special characteristic of the PDMS on this passive microwave device. The PDMS has some unique properties such as transparency, durability, and lightweight. Moreover, its high electrical resistivity of 2.9 × 1014 Ω m and moderate dielectric constant of 2.7 make the PDMS a good substrate material for flexible devices. This desirable property gives the proposed device full range of flexibility and a great advantage in terms of durability without degrading the performance of the BLC. From the results obtained for bending and non-bending conditions, it can be seen that within the frequency range of operation, both the return loss and the isolation are kept below the theoretical value of −10 dB. The slight difference observed in the simulated and measured FBWs is due the fabrication tolerances.

Item Type:Article
Uncontrolled Keywords:branch-line coupler (BLC), copper fabric, polydimethylsiloxane (PDMS), rubber conductor (Zoflex)
Subjects:Q Science > QA Mathematics > QA75 Electronic computers. Computer science
Divisions:Computing
ID Code:76966
Deposited By: Fazli Masari
Deposited On:30 Apr 2018 14:30
Last Modified:30 Apr 2018 14:30

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