Consider a 150 m long airfilled hollow rectangular wave guide with cutoff frequency 6.5 GHz. If a shortpulse of 7.2 GHz is introduced into the input end of theguide, the time taken by the pulse to return the inputend is
In an airfilled rectangular waveguide the cutoff frequencies for TM_{11} and TE_{03} modes are both equal to 12 GHz.
Que: The dominant mode is
In an airfilled rectangular waveguide the cutoff frequencies for TM_{11} and TE_{03} modes are both equal to 12 GHz.
Que:At dominant mode the cutoff frequency is
For an airfilled rectangular waveguide given that
If the waveguide has crosssectional dimension a = 6 cm and b = 3 cm, then the intrinsic impedance of this mode is
In an airfilled waveguide, a TE mode operating at 6 GHz has
Que: The cutoff frequency is
In an airfilled waveguide, a TE mode operating at 6 GHz has
Que: The intrinsic impedance is
Consider an airfilled rectangular wave guide with a = 2.286 cm and b = 1.016 cm. The ycomponent of the TE mode is
Que: The propagation constant γ is
m = 2, n = 3
Consider an airfilled rectangular wave guide with a = 2.286 cm and b = 1.016 cm. The ycomponent of the TE mode is
Que: The intrinsic impedance is
Consider a airfilled waveguide operating in the TE_{12} mode at a frequency 20% higher than the cutoff frequency.
Que: The phase velocity is
v = c, f = 1.2 f_{c}
Consider a airfilled waveguide operating in the TE_{12} mode at a frequency 20% higher than the cutoff frequency.
Que: The group velocity is
A rectangular waveguide is filled with a polyethylene ( ε_{r} = 2.25 ) and operates at 24 GHz. The cutoff frequency of a certain mode is 16 GHz. The intrinsic impedance of this mode is
own in fig. It has dielectric discontinuity as shown in fig. If the guide operate at 8 GHz in the dominant mode, the standing wave ratio is
Since a > b, the dominant mode is TE_{10} .
Consider the rectangular cavity as shown in fig.
Que: If a < b < c, the dominant mode is
Consider the rectangular cavity as shown in fig.
Que: If a > b > c, then the dominant mode is
Consider the rectangular cavity as shown in fig.
Que: If a = c > b, then the dominant mode is
The air filled cavity resonator has dimension a = 3 cm, b = 2 cm, c = 4 cm. The resonant frequency for the TM_{110 }mode is
A 6 cm x 4 cm rectangular wave guide is filled with dielectric of refractive index 1.25
Que: The range of frequencies over which single mode operation will occur is
A 6 cm x 4 cm rectangular wave guide is filled with dielectric of refractive index 1.25
Que: The range of frequencies, over which guide support both TE_{10 }and TE_{01} modes and no other, is
3 GHz < f < 3.6 GHz
Two identical rectangular waveguide are joined end to end where a = 2b. One guide is air filled and other is filled with a lossless dielectric of ε_{r}. it is found that up to a certain frequency single mode operation can be simultaneously ensured in both guide. For this frequency range, the maximum allowable value of ε_{r} is
A parallelplate guide operates in the TEM mode only over the frequency range 0 < f < 3 GHz. The dielectric between the plates is teflon (ε_{r} = 2.1) .The maximum allowable plate separation b is
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