| Keywords |
CPW(Coplanar Waveguide) ; Coupled Line ; Varactor Diode ; Tuneable Filter ; Figure of Merit |
| Abstract |
This study investigated a new tuneable bandpass filter based on coplanar waveguide coupled line structure, and using the varactor diode for tuning the center frequency of the filter. The filter was designed by a commercial simulator and had a tuning range of 180[㎒] from 0.95[㎓] to 1.13[㎓]. The filter acceptable values regarding the insertion loss was less than 3[㏈] and its return loss greater than 12[㏈]. The figure of merit of the implemented tuneable filter increased with the reverse bias voltage up to 14[V] on the varactor diode. The proposed filter has a promising future as it can be used in integration processes and in various materials as substrate. |