0 0 votes A rectangular air-filled waveguide has cross section of $4 \mathrm{~cm} \times 10 \mathrm{~cm}$. The minimum frequency which can propagate in the waveguide is $1.5\; \mathrm{GHz}$ $2.0\; \mathrm{GHz}$ $2.5\; \mathrm{GHz}$ $3.0\; \mathrm{GHz}$ Transmission lines gate1997-ec waveguides analog-communications numerical-answers + – admin 334 views answer comment Share Follow Add Sync Questions Print 0 reply Please log in or register to add a comment.