Design of band-pass filter with harmonics suppression using open stub

We have proposed a band-pass filter with harmonics suppression for WiX (wireless express) communication system. The designed WiX band-pass filter composed of open and closed loops, tuning open stub, and defected ground structure (DGS). The tuning open stub can tune the pass band and the closed loop can improve the insertion loss characteristics. The harmonics are suppressed using the tuning open stub.