Rajasthan Polytechnic Third Year Paper 2016 – Microwave & Optical Fiber Engineering

Rajasthan Polytechnic Third Year Paper 2016 – Microwave & Optical Fiber Engineering

TEM wave cannot propagate in which one of the following ?
(a) two-wire transmission line
(b) co-axial cable
(c) Rectangular waveguide
(d) Micro-strip line

Nature of wave inside rectangular waveguide is
(a) Univorm plane wave
(b) Non-uniform plane wave
(c) Cylinderical wave
(d) Spherical wave

For some applications circular waveguides may be preferred to rectangular waveguide because of
(a) Lower attenuation
(b) The smaller cross-section needed at any frequency
(c) freedom from spurious modes
(d) rotation of polarisation

Tees and junctions constitute
(a) Single-port network
(b) two-port network
(c) three-port network
(d) three or more port network

Magic Tee is a combination of
(a) One-H and One-E plane Tee
(b) Two-H and One-E plane Tee
(c) One-H and Two-E plane Tee
(d) None of the above

The directivity of an ideal directional coupler is
(a) unity
(b) zero
(c) infinity
(d) 40 dB

Klystron opreation is based on the principle of
(a) Velocity modulation
(b) Amplitude modulation
(c) Frequency modulation
(d) Phase modulation

Which of the following are microwave source?
(a) Two cavity Klystron
(b) Magnetron
(c) IMPATT
(d) TWTA

A reflex klystron function as a
(a) Microwave amplifier
(b) Microwave oscillator
(c) High gain cavity
(d) both (a) and (b)

The major advantage of TWT over a klystron lies in its
(a) higher bandwidth
(b) higher gain
(c) higher frequency
(d) higher output