EC8701 ANTENNAS AND MICROWAVE ENGINEERING
OBJECTIVES:• To enable the student to understand the basic principles in antenna and microwave system design
• To enhance the student knowledge in the area of various antenna designs.
UNIT I INTRODUCTION TO MICROWAVE SYSTEMS AND ANTENNASMicrowave frequency bands, Physical concept of radiation, Near- and far-field regions, Fields and Power Radiated by an Antenna, Antenna Pattern Characteristics, Antenna Gain and Efficiency, Aperture Efficiency and Effective Area, Antenna Noise Temperature and G/T, Impedance matching, Friis transmission equation, Link budget and link margin, Noise Characterization of a microwave receiver.
UNIT II RADIATION MECHANISMS AND DESIGN ASPECTSRadiation Mechanisms of Linear Wire and Loop antennas, Aperture antennas, Reflector antennas, Microstrip antennas and Frequency independent antennas, Design considerations and applications.
UNIT III ANTENNA ARRAYS AND APPLICATIONSTwo-element array, Array factor, Pattern multiplication, Uniformly spaced arrays with uniform and non-uniform excitation amplitudes, Smart antennas.
Microwave Passive components: Directional Coupler, Power Divider, Magic Tee, attenuator, resonator, Principles of Microwave Semiconductor Devices: Gunn Diodes, IMPATT diodes Schottky Barrier diodes, PIN diodes, Microwave tubes: Klystron, TWT, Magnetron.
UNIT IV PASSIVE AND ACTIVE MICROWAVE DEVICES
UNIT V MICROWAVE DESIGN PRINCIPLESImpedance transformation, Impedance Matching, Microwave Filter Design, RF and Microwave Amplifier Design, Microwave Power amplifier Design, Low Noise Amplifier Design, Microwave Mixer Design, Microwave Oscillator Design
OUTCOMES:The student should be able to:
• Apply the basic principles and evaluate antenna parameters and link power budgets
• Design and assess the performance of various antennas
• Design a microwave system given the application specifications