Q. As frequency increases, the transmission efficiency

View solution

Q. A circular polarizer converts a linearly polarized wave into a circularly polarised wave.

View solution

Q. If D is diameter of circular waveguide the cutoff wave-length for TE₁₁ mode is equal to

View solution

Q. The external magnetic field in a magnetron is such that lines are

View solution

Q. Varactor diodes use

View solution

Q. A circular waveguide carries TE₁₁ mode whole radial electric field is given by

Er = E₀j₁(r) sin Φ V/m
where r is radial distance in cm from the axis

The cut off wavelength is

View solution

Q. The domain mode in rectangular waveguide is

View solution

Q. The reverse voltage applied to a varactor diode

View solution

Q. To ensure that only dominant mode TE₁₀ is allowed to propagate in an air filled rectangular waveguide, the lower frequency limit and upper frequency limit are

View solution

Q. The skin depth at 1000 MHz as compared to that at 500 MHz is

View solution

Q. The transit time (in cycles) for electrons in repeller space of reflex klystron oscillator for sustaining oscillations is (n is any integer)

View solution

Q. In a TWT the amplitude of resultant wave travelling down the helix remains constant

View solution

Q. In an infinite line the input impedance at every point is equal to characteristic impedance.

View solution

Q. Consider the following time parameters

1. Domain growth time constant.
2. Transit time.
3. Dielectric relaxation time in positive mobility regime.

Which of the above are used in connection width transferred electron device?

View solution

Q. PIN diode has

View solution

Q. The two terms used to describe performance of a directional coupler are

View solution

Q. The number of PM radio channels which can be accommodated in a spectrum of 300 MHz is about

View solution

Q. Consider the following statements

1. Gunn diode can be used in combinational logic circuits.
2. Gunn diode can be used in sequential logic circuits.
3. Both Gunn diode and GaAs Mesfet can be used in logic circuits.

Which of the above statements are correct?

View solution

Q. Assertion (A): Microstrip is very commonly used in microwave integrated circuits.

Reason (R): Microstrip has an easy access to the top-surface so that active and passive discrete components can be easily mounted.

View solution

Q. When resonant cavities are coupled together the result is

View solution