Design and Practical Realization of Lumped Element RF Bandpass Filter

In this paper, design and practical realization of radio frequency (RF) bandpass filter (BPF) with center frequency 756MHz and -3dB bandwidth of 15MHz is presented. BPF is realized by discrete LC components. Each LC component used in BPF circuit has been carefully analyzed and determined by appropriate equivalent circuits, which were created in MATLAB. Subsequently, BPF circuit has been created using these individual circuits. According to obtained BPF circuit in MATLAB, the transmission and reflection parameters can be set properly to acquire desired specifications. Scattering parameter measurements of practically realized BPF were carried out for verification of proposed method.