Flexible and Wearable EBG loaded SIW Band Pass Filter (BPF)

A substrate integrated waveguide (SIW) band pass filter (BPF) which is flexible in nature is discussed in this paper. Simple longitudinal ladder shaped electromagnetic band gap structure (EBG) is explored to obtain attenuation at the higher frequencies of the waveguide. Ordinary jeans fabric with thickness of 2mm, dielectric constant of 2.72 and loss tangent of 0.002 is used to prepare the filter for wearable applications. Wide passband frequencies ≈ 5 GHz to ≈ 13 GHz is observed by this technique. Important slot parameters which are affecting the transmission bandwidth are studied and presented with optimized results. The band pass filter which is proposed in this paper is having an insertion loss <1dB. The filter proposed in this paper is suitable for body wearable communication modules for emergency and rescue workers.