Microstrip Triband Bandstop Fitler with Sharp Stop Band Skirts and Independently Controllable Second Stop Band Response

Table 1

Performance comparison of simulated and measured results of the proposed TBBSF.

Parameter	Simulation	Measurement
TBBSF of order N = 1
Center frequencies (GHz)	1.90, 3.55, 5.50	1.93, 3.61, 5.50
Insertion loss (IL) (dB)	−0.20, −0.28, −0.55	−0.50, −0.67, −0.93
Return loss (RL) (dB)	−32.4, −34.1, −25.1	−25.8, −28.7, −22.3
BW at −3 dB	0.92, 1.03, 0.55	0.98, 1.01, 0.62
TBBSF of order 𝑁=2
Center frequencies (GHz)	1.92, 3.55, 5.50	1.98, 3.63, 5.50
IL (dB)	−0.15, −0.32, −0.32	−0.34, −0.55, −0.68
RL (dB)	−55.4, −68.4, −39.8	−54.8, −56.7, −38.6
BW at −3 dB	0.92, 1.08, 1.02	0.92, 1.02, 1.08