DESIGN AND PERFORMANCE OF COPLANAR WAVE-GUIDE SLOTLINE BANDPASS FILTER

This paper describes the work involved in designing a coplanar wavegui de slotline bandpass filter. The filter designed to achieve at least - 30dB insertion loss (S-21) in the stopband (8 to 8.5; 9.3 to 10 GHz) a nd less than -0.2 dB in the passband (8.75 to 9.05 GHz), with a centre frequency of 8.9 GHz. The filter and transition were fabricated on 1. 27 mm thick RT-Duriod 6010.2 substrate and S-parameters were tested us ing standard SMA connectors with an HP-8510A network analyser.