Journal
EUROPEAN PHYSICAL JOURNAL-APPLIED PHYSICS
Volume 29, Issue 1, Pages 65-72Publisher
EDP SCIENCES S A
DOI: 10.1051/epjap:2004208
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This paper presents several techniques for determining the complex conductivity of highly electrically conducting polymer films at microwave frequencies. The advantages and disadvantages of these techniques are discussed. Microwave measurements were investigated using resonant cavity, re. ection/transmission and impedance surface techniques. The dc conductivity was measured using the four wires technique. Polyaniline (Pani/DEHEPSA) films of 120 mum thickness, have conductivity of (5000-6000 S/m) and permittivity of 6000 +/- 1000 over X and S bands. The high values of the measured conductivity and its weak dependence on frequency at least up to 12 GHz, confirm the metallic character of Pani-films and their efficient use in micro-electronic technology such as microwave integrated circuits (MMIC) and microwave devices.
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