Design of a Compact Meander Microstrip Bandpass Filter for 4.19 GHz C-Band Applications

This paper presents the design and simulation of a compact meandered microstrip bandpass filter (BPF) operating at 4.19 GHz for C-band wireless systems. The design employs a folded transmission line (meandered) structure to achieve miniaturization while maintaining effective signal performance. The filter is implemented on an FR4 substrate with a dielectric constant εr of 4.4, thickness of 1.6 mm, and loss tangent of 0.02. Simulations were performed using Keysight Advanced Design System (ADS). The filter achieves an insertion loss of 0.559 dB and a return loss of 13.434 dB, indicating enhanced performance characteristics in the 4.19 GHz passband. The achieved characteristics make the design suitable for communications using satellite and radar systems and also for accessing fixed wireless applications which are operating in the lower C-band.