|TRANSMISSION LINES & ANTENNAS|
|Written by Administrator|
|Saturday, 07 November 2009 12:56|
PART - A
Unit - 1
Transmission – Line THEORY: The transmission Line general solution, The distortion less Line, The telephone cable, Reflection on a Line not terminated in Z0, Open and short circuited Lines, Reflection loss, Insertion loss, T and PI sections equivalent to Lines, Constant K LPF & HPF.
Unit - 2&3
The Line at radio FREQUENCIES: Constants for the Line of zero dissipation, Standing waves; nodes; standing wave ratio, Input impedance of open and short circuited Lines, The quarter wave Line; impedance matching, single stub impedance matching on a Line. The smith circle diagram, Application of the Smith chart, Double stub impedance, Open and Short circuit impedances when considering dissipation, Quarter and Half wave Lines of small dissipation.
Unit - 4
Antenna Basics: Introduction, basic Antenna parameters, patterns, beam area, radiation intensity, beam efficiency, diversity and gain, antenna apertures, effective height, bandwidth, radiation, efficiency, antenna temperature and antenna filed zones.
PART - B
UNIT - 5
Point Sources and Arrays: Introduction, point sources, power patterns, power theorem, radiation intensity, filed patterns, phase patterns. Array of two isotropic point sources, non-isotropic but similar point sources, principles of pattern multiplication, examples of pattern synthesis by pattern multiplication, non-isotropic point sources, broad side array with non unipolar amplitude distribution, broad side versus end fire array, direction of maxima fire arrays of n isotropic point sources of equal amplitude and spacing.
Unit - 6
Electric dipoles and thin linear antennas: Introduction, short electric dipole, fields of a short dipole, radiation resistance of short dipole, radiation resistances of lambda/2 Antenna, thin linear antenna, micro strip arrays, low side lobe arrays, long wire antenna, folded dipole antennas.
Unit - 7
Loop, slot, patch and horn antenna: Introduction, small loop, comparison of far fields of small loop and short dipole, loop antenna general case, far field patterns of circular loop, radiation resistance, directivity, slot antenna, Balinet’s principle and complementary antennas, impedance of complementary and slot antennas, patch antennas, horn antennas, rectangular horn antennas.
unit - 8
Antenna Types: Helical Antenna, Yagi-Uda array, corner reflectors, parabolic reflectors, log periodic antenna, lens antenna, antenna for special applications – sleeve antenna, turnstile antenna, omni directional antennas, antennas for satellite antennas for ground penetrating radars, embedded antennas, ultra wide band antennas, plasma antenna.( Note: No derivations for the topics in this section).
2. Antennas, John D. Krauss, III (SEI) edition, McGraw-Hill International edition, 2006.
3. Antennas and Wave Propagation - Harish and Sachidananda: Oxford Press 2007.
1. Antenna Theory Analysis and Design - C A Balanis, 2nd ED, John Wiley, 1997.
2. Antennas and wave propagation - G S N Raju: Pearson Education 2005.