High Attenuation Lumped Element Band-Stop Filter Design Using Resonator Tuning Method

This paper presents a new design method for the high attenuation of a lumped element band-stop filter. The designed 960 - 1215 MHz band-stop filter is a structure that passes below 750 MHz and above 1500 MHz and provides an attenuation value below -50dB. This 7th order modified Cheby-shev topology band-stop filter designed with lumped elements has been manipulated to provide a -50 dB attenuation value by manipulating the Q factor values provided by the resonance structures. The synthesis and development processes of the band-stop filter are mentioned, respectively. The design was created in the AWR Design Environment and simulated with ideal and vendor components. PCB was designed and implemented using the Altium Design Software. PCB design was manufactured. S-parameter measurements of the band-stop filter were taken and recorded.