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3. Derive the TM modes of the slab waveguide that is constructed by placing a dielectric slab (thickness d) of dielectric constant (εd) on a ground plate , assuming the slab and ground plate extend to infinite in the x and z (propagation) direction . Assuming the thickness is 3 cm and the dielectric constant is 4 , what is the cutoff frequency of TM3? If a short source of frequency 3 GHz is generated in the waveguide , how many modes will be allowed to propagate inside?... |
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