ECE · all questions

Microwave Communication
practice.

Practice every MCQ with options. Use Show answers when you want the correct option and solution.

179

Questions

7/9

Page

Pick an option on a question to see the right answer and solution.

Q121

For transverse electric waves between parallel plates, the lowest value of m, without making all the field components zero, is equal to

Select an option to see the answer and solution.

Q122

Which of the following devices can be used as low power oscillator only?

Select an option to see the answer and solution.

Q123

For which of the following reasons, the coupling between the tunnel diode and its cavity is kept loose?

Select an option to see the answer and solution.

Q124

Which statement is false about micro-strip line over strip-line?

Select an option to see the answer and solution.

Q125

A balun transformer gives an impedance transformation of

Select an option to see the answer and solution.

Q126

At microwave frequencies, we prefer waveguides to transmission lines for transporting EM energy because of all the following except that

Select an option to see the answer and solution.

Q127

In a travelling wave tube, the phase velocity of the axial components of the field of the slow wave structure is kept

Select an option to see the answer and solution.

Q128

Which of the following parameters is used in RF design?

Select an option to see the answer and solution.

Q129

For a cavity resonator with, Q₀ = unloaded Q and ρ = standing wave ratio, Q_e = the loaded Q is given by

Select an option to see the answer and solution.

Q130

A two terminal negative resistance device that can be employed in an amplifier oscillator (or) switch.

Select an option to see the answer and solution.

Q131

High frequency transistors are designed especially for:

Select an option to see the answer and solution.

Q132

A distortion analyzer uses twin-T filter to

Select an option to see the answer and solution.

Q133

The maximum usable frequency of an ionospheric layer at 60° incidence and with 8 MHz critical frequency is

Select an option to see the answer and solution.

Q134

The cut-off frequency of the dominant mode of a rectangular waveguide having aspect ratio more than 2 is 10 GHz. The inner broad wall dimension is given by

Select an option to see the answer and solution.

Q135

For which of the following reasons the TWT is sometimes preferred to the multi-cavity klystron amplifier?

Select an option to see the answer and solution.

Q136

A rectangular waveguide having TE₁₀ mode as dominant mode is having a cutoff frequency of 18-GHz of the TE₃₀ mode. The inner broad-wall dimension of the rectangular waveguide is

Select an option to see the answer and solution.

Q137

The dominant mode in a rectangular waveguide is TE₁₀, because this mode has

Select an option to see the answer and solution.

Q138

A cylindrical cavity operating in TE₁₁₁ mode has a 3 dB bandwidth of 2.4 MHz and its quality factor is 4000. Its resonant frequency would be

Select an option to see the answer and solution.

Q139

Which of the following statements is not true of waves in general

Select an option to see the answer and solution.

Q140

An H-plane tee is also known as

Select an option to see the answer and solution.

Prev 5 6 7 8 9 Next