Polyester‐based wearable bandpass microstrip filter

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Abstract
In this research paper, a polyester‐based bandpass microstrip filer is proposed. Split ring resonator, stepped‐impedance resonator structure, and coupled microstrip lines are used to design the proposed filter circuit in the pass band of 4.35 to 4.60 GHz for NATO frequency band military applications. The filter is fabricated using polyester substrate and self‐adhesive copper tape. The Agilent vector network analyzer is used to test the fabricated polyester wearable filter. There is good agreement between the simulated as well as measured insertion loss and return loss of the proposed wearable filter.

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