Ak. Rastogi et Ak. Tiwari, VARIATION OF WAVE IMPEDANCE OF SHIELDED SUSPENDED DIELECTRIC GUIDE, International journal of infrared and millimeter waves, 14(9), 1993, pp. 1825-1845
A shielded suspended dielectric guide is a dielectric rectangular slab
enclosed by regular metallic side walls from all the sides. This type
of structure is used in dual mode phase shifter where the size of the
normal rectangular wave guide is reduced at the ends, where a dielect
ric material is embeded in ferrite core. Hence impedance variation of
a phase shifter at its transition may be easily calculated using shiel
ded suspended dielectric guide which is a prime parameter for optimum
efficiency of wave launching.