N. BENAHMED ET AL.
125
S
12
11
12
11
Figure 9. Scattering parameters of the designed 50 Ω UWB BPF obtained by MATPAR software.
6. Conclusions
A novel and a simple compact ultra wideband bandpass
filter using rectangular coaxial cables with square inner
conductors, convenient for high power applications, is
presented, analyzed and designed. The design of the
UWB filter is based on the use of impedance steps and
coupled-line sections.
The designed rectangular coaxial cable bandpass filter
is only 6.7 × 8.9 × 33.4 mm in size and can be easily
designed and fabricated using CST MICROWAVE
STUDIO® Transient Solver or other commercial EM
software. The bandwidth of the designed filter is between
3 - 10 GHz, the insertion-loss amounts to around 0.35 dB
and the return loss is higher than 10 dB in a large fre-
quency range. The simulated results of stopband per-
formances are better than 15 dB for a frequency range up
to 11 GHz.
7. References
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