The subject is a technical paper and questions asked are such as Dual characteristics of an antenna, Radiation from Two wire, optimum spacing used in parasitic array, Helical Antenna, Space wave propagation, Duct propagation, characteristics of F1 and F2 layers, reasons for reduction of field strength in sky wave propagation, Directive Gain and Power Gain, Parasitic Element etc. The paper contains 1-2 questions of numerical type and some questions are asked of diagram based type, in this type of questions, candidates are required to solve the questions with suitable diagram or circuit diagram. All questions are of equal marks and each question is further divided into 2-3 sub questions.
Questions in this paper are 8 and 5 from that questions are required to be attempted.
The subject of Antennas and wave Propagation is a technical paper and questions asked in this paper are from the theoretical as well as numerical part. The department of ECE is one of the most preferred branches in engineering as it provides loads of the jobs and the field is very vast. Modes of propagation, Structure of atmosphere, Ground wave propagation, Tropospheric propagation, Duct propagation, Troposcatter propagation, Flat earth and Curved earth concept Sky wave propagation – Virtual height, critical frequency, Maximum usable frequency – Skip distance, Fading, Multi hop propagation.JNTU is providing degree of engineering since last two decades and standard of education is increasing year by year. Modern antennas- Reconfigurable antenna, Active antenna, Dielectric antennas, Electronic band gap structure and applications, Antenna Measurements-Test Ranges, Measurement of Gain, Radiation pattern, Polarization, VSWR Principle of frequency independent antennas –Spiral antenna, Helical antenna, Log periodic. N element linear array, Pattern multiplication, Broadside and End fire array – Concept of Phased arrays, Adaptive array, Basic principle of antenna Synthesis-Binomial array
Radiation from rectangular apertures, Uniform and Tapered aperture, Horn antenna, Reflector antenna, Aperture blockage, Feeding structures, Slot antennas ,Microstrip antennas – Radiation mechanism – Application ,Numerical tool for antenna analysis Matching – Baluns, Polarization mismatch, Antenna noise temperature, Radiation from oscillating dipole, Half wave dipole. Definition of antenna parameters – Gain, Directivity, Effective aperture, Radiation Resistance, Band width, Beam width, Input Impedance.
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