Parametric Geometrical Study of OOO-Microstrip Circuit with Dual-Band Bandpass NGD Behavior
2021
This paper introduces a bandpass (BP) NGD
circuit design engineering. The developed circuit is designed and implemented using distributed microstrip technology and operates with outstanding dual-band bandpass
NGD performance added with low attenuation. The BP
NGD topology presents an innovative geometrical shape
represented by an OOO (triple O) structure composed of
multi-parameter parallel transmission lines (TLs) based
elements. The OOO type NGD circuit is mainly composed
of different physical length TLs and two identical coupled
lines (CLs). Then extensive parameter NGD analyses are
elaborated to investigate on the influences of each physical
size of OOO circuit on the NGD performances. Through
the difference of physical length of transmission line, the
delay can be adjusted. Through the results of simulation
and measurement, it can be seen that the center frequency
points are about 0.75 GHz and 1.46 GHz respectively, and
the time delay is about –1.83 ns and –2.6 ns respectively.
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