“…Above techniques mentioned in the literature for the suppression of bandpass filter harmonics are not sufficient for present requirements, because they provide a large bandwidth of rejection. As per current requirement, BSF should reject unwanted 860 MHz (2.25 GHz
430 MHz) 3 dB frequency in the band of 1–10 GHz [
10]. A distributed element‐based “synthesis by optimization technique” is proposed to achieve band stop filters characteristics with extended upper passbands [
11].…”