1 results about "Microstrip bandpass filter" patented technology

This invention discloses a miniaturized S-band microstrip bandpass filter, comprising an interdigital resonant unit and a hairpin resonant unit, with the hairpin resonant unit positioned in the middle of the interdigital resonant unit. This invention optimizes the left-end suppression performance of the interdigital microstrip bandpass filter by introducing a hairpin microstrip open-circuit line into the interdigital microstrip bandpass filter and forming a transmission zero at the left end through the structure of the hairpin resonant unit itself. Furthermore, the hairpin resonant unit is composed of U-shaped microstrip open-circuit lines, resulting in a small size that simultaneously meets the requirements of miniaturization and high suppression performance.