Question

An attenuator can be made using a section of waveguide operating below cutoff. Such a device consists of a waveguide of width a, followed by second section of the waveguide of width a/2 and finally with another section of width a If a 2.286 cm and the operating frequency is 12 GHz, determine the required length of the below-cutoff section of waveguide to achieve an attenuation of 100 dB between the input and output guides. Ignore the effect of reflections at the step discontinuities. Show all illustrations and state necessary assumptions.

Answer 1

Ivemhat Con e made uing Soction An atlenutor Sol a/ Propagalion 2 80 43.7 T 271 2|| O.02286 Kc 81.5T O.oll43 Evanese ent mo-de 2. .3 (zr) 989 8 C.3) dB 8.636 O.163 m