With the trend of integrating several applications in communication
devices becoming increasingly common, the need to design
multi-band microwave components has become more important than
ever. Metamaterial lines or left-handed transmission lines (LHTLs),
on account of their unique dispersion properties, are suitable for
multi-band applications [1, 2]. This Letter presents a quad-band power
divider which is implemented by replacing the transmission line (TL)
segments of a previously proposed dual-band power divider (shown in
Fig. 1a) [3] with left-handed (LH) cells.
In this articel, A quad-band equal power divider has been designed by exploiting the
multi-band operation of left-handed transmission lines. Unit cell design
based on dispersion analysis is provided. A practical power divider that
demonstrates equal power division at frequencies 0.47, 0.8, 1.85 and
3.35 GHz was designed and fabricated by implementing the lefthanded
cells in microstrip technology