In this paper, the method of lines and finite-difference time-domain numeri
cal methods are used to investigate the field distribution, dispersion, and
impedance characteristics of the grooved microstrip line (GMSL) structure.
It is found that the GMSL is less dispersive compared to conventional micr
ostrip lines, and also provides a wide range of characteristic impedance va
lues as a function of the groove width. Increasing the groove width of the
microstrip structure can also reduce the dielectric and conductor Losses of
the GMSL.