STUPIDSID
1 (a)
Define the following terms:
(i) Beam solid angle
(ii) Directivity
(iii) Antenna Aperture
(iv) Radiation resistance
(i) Beam solid angle
(ii) Directivity
(iii) Antenna Aperture
(iv) Radiation resistance
7 M
1 (b)
Explain Hertzian Dipole. And Find the Radiation resistance of a Hertzian dipole of length λ/40, λ/60, λ80.
7 M
2 (a) (i)
Derive the expression of Friss transmission formula.
4 M
2 (a) (ii)
Discuss the Antenna field zones.
3 M
Solve any one question from Q2(b) & Q2(c)
2 (b)
Obtain the expressions of electric and magnetic fields of an Alternating current element.
7 M
Explain:
2 (c) (i)
The Principle of Pattern multiplication.
3 M
2 (c) (ii)
Binomial arrays.
4 M
Solve any two question from Q3(a), Q3(b) & Q3(c), Q3(d)
3 (a)
State Babinet's principle and illustrate its application to slot antennas and complementary antennas.
7 M
3 (b)
Explain the Helical Geometry with proper Diagram. Also Calculate the directivity, HPBW and terminating resistance for a Helix operating in an axial mode with
following dimensions:
Number of turns=8, Operating frequency=2GHz, Circumference=0.6λ, Distance between turns=0.2λ.
Number of turns=8, Operating frequency=2GHz, Circumference=0.6λ, Distance between turns=0.2λ.
7 M
3 (c)
Explain the working of Artificial dielectric lens Antenna and derive the expression
for Effective refractive index of such a lens formed by conducting sphere.
7 M
3 (d)
Derive the expression of the Radiation resistance of Small loop antenna.
7 M
Solve any two question from Q4(a), Q4(b) & Q4(c), Q4(d)
4 (a)
State the Rumsey's principle and discuss the current criteria for the antenna to be
frequency independent. Enlist the different frequency independent antennas and
applications of it.
7 M
4 (b)
Derive the expression for the field distribution across the aperture of the cylindrical parabolic reflector.
7 M
4 (c)
Explain the following:
(i) Gain measurement methods
(ii) Phase measurement methods
(i) Gain measurement methods
(ii) Phase measurement methods
7 M
4 (d)
Write a short note on Horn antenna.
7 M
Solve any two question from Q5(a), Q5(b) & Q5(c), Q5(d)
5 (a)
Write a Short note on Microstrip Antenna.
7 M
5 (b)
Explain the following:
(i) Duct propagation
(ii) Virtual height
(iii) MUF
(iv) Skip distance
(i) Duct propagation
(ii) Virtual height
(iii) MUF
(iv) Skip distance
7 M
5 (c)
Explain the Ultra wideband antenna(UWB) antenna for Digital application.
7 M
5 (d)
Expalin the Different modes of Radio wave propagation.
7 M
More question papers from Antenna And Wave Propagation