Design of a Suspended Stripline Narrow Bandpass Filter with Ultrawideband Harmonic Suppression

Table 1

Performance comparison of the proposed filter with the previously developed harmonic-suppressed NBPFs.

Ref.	Center freq (GHz)	Fractional bandwidth (%)	Insertion loss (dB)	Harmonic suppression
[1]	1.5	7	1.4	22 dB up to
[2]	1.92	8	0.75	20 dB up to
[3]	1.63	9	0.66	25 dB up to
[4]	2.0	3.3	2.9	20 dB up to
[5]	1.9	4	2.5	20 dB up to
This work	0.75	5	0.9	22 dB up to