Fig. 14 Time domain simulation set up for the proposed UWB notch
antenna in face-to-face configuration.
In this simulation set up for the simulation of the time domain behavior
of the proposed antenna, proposed UWB notch antenna in the transmitting
side is excited with a Gaussian pulse as the input signal shown in the
figure 15. At the receiving side, the output pulse at the replica of the
proposed antenna is captured and is shown in the figure 15. In the
figure 15 the comparison of the input pulse (transmitted pulse) and
output pulse (received pulse) is thus accomplished. The tail of the
received pulse is disturbed and considerable amount of ringing is
visible in the graph from 0.4 ns to 2 ns. The ringing or the received
pulse distortion is more at around 0.4 ns and decays down slowly towards
as the time increases. This ringing or the distortion of the pulse is
due to the presence of the notch band from 5 GHz to 6 GHz. Because of
the presence of notch centered at 5 GHz the received pulse is obstructed
heavily leading to appreciable ringing as compared to the transmitted
pulse as there is absolutely no ringing in the tail of the input pulse.
Fidelity factor of the proposed UWB notch antenna is 0.92 or 92% as
calculated by mathematical formula furnished by the equation (3). The
fidelity factors of the proposed UWB notch antenna, calculated when it
is configured in face-to-face reveals the similarity between the
transmitted pulse and the received pulse. Good correlation between the
transmitted pulses and received pulses by proposed UWB notch antenna can
be identified from the fidelity factor value. From this fidelity factor
value of the face-to face configuration of the proposed antenna, a
conclusion can be drawn that the excellent pulse handling capability is
exhibited by the proposed UWB notch antenna as required by the UWB
communication system.