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Concept drill

Waveguide

GATE Electronics & Communication · Electromagnetics - Waveguides · 1987-2026

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2026 Q33

The cutoff frequency (in GHz) for the dominant TE10 mode of an air-filled rectangular waveguide of inner dimension 0.28 inch × 0.14 inch is ____. (rounded off to two decimal places...

mediumanswer key
2019 Q37

The dispersion equation of a waveguide, which relates the wavenumber k to the frequency $\omega$, is $k(\omega) = (1/c)\sqrt{\omega^2 - \omega_0^2}$ where the speed of light $c = 3...

medium
2007 PYQ

An air-filled rectangular waveguide has inner dimensions of $$3\,cm\,\, \times \,\,2\,\,cm\,$$. The wave impedance of the $$T{E_{20}}$$ mode of propagation in the waveguide at a fr...

mediumanswer key
2005 PYQ

Which one of the following does represent the electric field lines for the $$T{E_{02}}$$ mode in the cross-section of a hollow rectangular metallic waveguide?

mediumanswer key
2003 PYQ

A rectangular metal wave guide filled with a dielectric material of relative permittivity $${\varepsilon _r} = \,4$$ has the inside dimensions $$3.0\,cm\,\, \times \,\,1.2\,cm$$. T...

easyanswer key
2001 PYQ

The phase velocity of waves propagating in a hollow metal waveguide is

easyanswer key
1999 PYQ

Assuming perfect conductors of a transmission line, pure TEM propagation is NOT possible in

easyanswer keyelite explanation
1997 PYQ

A rectangular air-filled waveguide has a cross section of $$4\,cm\,\, \times \,\,10cm$$. The minimum frequency which can propagate in the waveguide is

easyanswer key
1996 PYQ

In an air-filled rectangular waveguide, the vector electric field is given by $$\mathop E\limits^ \to = \cos \,(20\,\pi \,y)\,\exp \,\,\left[ { - j\left( {{{40\,\,\pi } \over 3}} \...

hard
1994 PYQ

A rectangular hollow metal waveguide of internal cross-section of $$7.366\,\,cm\,\, \times \,\,3.556\,cm$$ carries a 3 GHz signal in the $$T{E_{10}}$$-mode. Calculate the maximum p...

hard
1990 PYQ

Choose the correct statements. For a wave propagating in an air filled rectangular wave guide

mediumanswer key
1988 PYQ

For a normal mode EM wave propagating in a hollow rectangular wave guide

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1987 PYQ

The cut-off frequency of a waveguide depends upon

easyanswer key