1. A thin cylindrical dipole antenna of radius a and length 1.3λ is driven by a time harmonic gap voltage V0. Develop a computer program to solve the Pocklington integral equation for the unknown antenna current distribution I(z) using the method of m
₹600-1500 INR
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Imechapishwa over 6 years ago
₹600-1500 INR
Kulipwa wakati wa kufikishwa
1. A thin cylindrical dipole antenna of radius a and length 1.3λ is driven by a time harmonic gap voltage
V0. Develop a computer program to solve the Pocklington integral equation for the unknown antenna
current distribution I(z) using the method of moments. Given: a = 2 mm , λ = 0.5 m, V0 = 20 V. Use
the magnetic frill generator as the source model assuming an input impedance of the ideal 1.3λ
antenna. Assume the gap is d = 1 mm. Include the following in your answer:
a. An investigation of the element density required for adequate coverage of the numerical solution.
b. Plot the current distribution along the antenna.
c. Calculate the input impedance of the antenna and compare with the assumed impedance.
d. Now suppose that we are free to change the thickness of the antenna, keeping all other parameters
constant. Show how the current in the antenna changes as a is changed from a=0.01mm, to
a=5mm. Compare the current along the antenna by plotting the results for the various thicknesses
on a single plot. Calculate the input impedance in each case. Comment on the results.
e. Plot the input impedance as a function of antenna thickness for radii from 0.01mm to 5mm
e. Assume a = 0.1 mm and the gap is varied. Calculate the current distribution for a gap equal to
d=0.01mm, d=0.1mm, d=0.5mm, d=1mm and d=5mm. Compare the current along the antenna
by plotting the results for the various gaps on a single plot. Calculate the antenna input
impedance in each case.