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

Q. The AM, PM, and TV broadcast frequencies are

View solution

Q. Assertion (A): For a reciprocal microwave junction the S matrix is symmetrical.

Reason (R): In a symmetrical matrix Sij = Sji.

View solution

Q. In TE mode of waveguide Ez = 0

View solution

Q. The primary constants of a transmission line are

View solution

Q. As compared to their values in free space

View solution

Q. Characteristic impedance of a coaxial cable is inversely proportional to √∈r.

View solution

Q. A rectangular waveguide has a discontinuity in the form of reduced narrow dimension. In the equivalent circuit this discontinuity can be represented by

View solution

Q. Depth of penetration does not depend on frequency.

View solution

Q. TE₀₁ mode of propagation of electromagnetic energy

View solution

Q. Assertion (A): Slotted line is frequently used for microwave measurements.Reason (R): The unknown impedance is mounted at the end of slotted line.

View solution