Abstract:
A novel wideband bandpass filter with sharp roll off using folded high – low impedance resonator with aperture
based edge coupled technique is presented. The proposed
bandpass filter has a 3 dB fractional bandwidth of 101.8% and
the structure is compact. The centre frequency of the filter is
5.5 GHz. The prototype filter is designed using a low cost FR4
glass epoxy substrate with a dielectric constant 4.4 and a
thickness of 0.8mm. IE3D software is used for the simulation
and optimization of the filter structure. Sharp roll-off of the
filter structure is achieved by the two transmission zeros
generated by the centrally loaded folded high - low impedance
resonator. Stopband performance with 17.23 dB suppression
level is obtained upto 13.6 GHz.
