Q. In microwave communication links the fading due to rain occurs. The methods to solve this problem include

View solution

Q. Which of the following is not used as a microwave mixer or detector?

View solution

Q. Integrated fin line can be utilized as a medium for constructing millimeter wave circuits.

View solution

Q. The secondary constants of a line are

View solution

Q. In a loss less line the propagation constant is equal to

View solution

Q. A rectangular wave guide has two stubs each of length λ/4 connected at the source end. The stubs are circuited. Then the stubs present

View solution

Q. Which one of the following is also called 'rat race'?

View solution

Q. Radar principle is used in

View solution

Q. In an optional fiber the refractive index of cladding material should be

View solution

Q. In microwave circuits, a mode transducer is used to

View solution

Q. A waveguide connected to a circularly polarized antenna must be able to efficiently propagate both vertically and horizontally polarised waves.

View solution

Q. Assertion (A): Inter-digitated geometry is widely used for microwave transistors.

Reason (R): Tuning at input and output of transistor uses MOS chip capacitors.

View solution

Q. For a 1 cm x 2 cm air filled rectangular waveguide the maximum frequency should be less than about

View solution

Q. Hollow waveguides are used as transmission lines at frequencies

View solution

Q. To ensure that only dominant TE₁₀ mode propagates in a rectangular waveguide, the operating frequency

View solution

Q. In a microwave power measurement using bolometer, the principle of working is variation of

View solution

Q. Z₀ = (Zoc Zsc)^0.5

View solution

Q. A microwave junction is matched at all ports if the S matrix

View solution

Q. Assertion (A): A line of length slightly more than λ/4 and open circuited at far end is equivalent to an inductive reactance.

Reason (R): A line of length slightly more than λ/4 and short circuited at far end behaves as a capacitive reactance.

View solution

Q. The total power radiated from an antenna system is determined by imagining that the antenna is at the centre of a very large

View solution