A hybrid radio frequency (RF) switching device includes first to fourth ports,
a diode coupled between the first port and second port, a first transmission line
having a length of g/4 (where g is a wave length of a frequency in
a first frequency band), and a first element coupled in series with the first transmission
line having an almost simple reactance component and nearly opening in a second
frequency band. The first transmission line and first element are coupled in series
between the second port and third port. The device further includes a second transmission
line having a length of d/4 (where d is a wavelength of a frequency
in the second frequency band), and a second element having an almost simple reactance
component and nearly opening in the first frequency band. The second transmission
line and second element are coupled in series between the second port and fourth port.