This paper reports the X-Band (8-12GHz) and Ku-Band (13-18GHz) microwave transmittance and reflectance of polyanline thin films electropolymerised on stainless steel substrate. The waveguide reflectometer method has been used for the microwave studies. The polyanline thin film changes the transmission and reflection properties of SS substrate. The effect of moisture on polyaniline thin films has been also reported. The larger dispersion is observed after moisture exposure. The thickness dependent properties are not very prominent. The frequency and current during deposition changes are observed.
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