Lecture Plan

1)Microwaves: Introduction, areas of application
a)What are microwaves?
b)What are the frequency bands?
c)Detailed use of microwave in various fields
2)Review of Maxwell’s equation
a)Both in differential and integral form
b)Recall various basic laws which are basis of maxwell’s equations
3)Wave Guide: Rectangular, cylindrical wave guide; Solution of wave equation
a)Discuss the need of waveguide
b)Differences between transmission lines and waveguides
c)lambda/4 condition
d)Dimensions of WG and its constrictions
e)Schrodinger wave equation and its Boundary condition
4)Modes and field pattern, Excitation of modes
a)TM,TE and TEM waves and modes
b)Condition for excitation of waves in both WG
c)Construction of field pattern
5) Propagation properties; Power transmission; Power losses
a)Discuss the boundary conditions for propagation of waves in WG
b)Use Poynting’s theorem for power distribution
c)Understand the poynting’s energy equation for stored and dissipated energies
6)Cavity resonators (Cylindrical and rectangular), Frequency meter
a)Discuss how a resonator can be formed.
b)Conditions for resonance and wave propagation in cavity resonator
c)How to use resonator for frequency measurements?
d)Different types of cavities
a)Need of S-parameters when Z,Y already exist
b)Open and short circuit impedance
c)Why Scattering parameters are called so?
8)Joint, bends, Irise and screws, short- circuit, Attenuator
a)Condition for reflection of wave in joints
b)Condition for inner bend and outer bend
c)Effective impedances in irises and screws
d)Need and use of short circuit
e)Discuss need for attenuation
9)Hybrid couplers
a)Directional coupler lambda conditions
c)Justification for coupled port
d)Ideal values for directivity and coupling
10)Magic Tee, Faraday’s rotation, Circulator, Phase shifter,Isolator
a)Discuss E plane, H plane Tee
b)Construct Magic Tee from E and H plane Tee
c)Whats the Magic in magic Tee?
11)Klystron Amplifier
a)How is klystron constructed?
b)What is the need of two cavity amplifiers over conventional tubes?
c)Discuss limitations of conventional tubes
d)Power efficiency
12)Reflex- Klystron
a)‘Reflex’ klystron called so?
b)Condition for amplification
c)Power efficiency
d)Feedback necessity
13)Magnetron (cylindrical)
a)Discuss M,O tubes
b)Shapes of magnetron
c)Magnetron be used as amplifier
e)Modes and electron movements
14)Overview of TWT, CFA
a)Construction of TWT
b)Amplification in TWT
c)Cross field devices
d)Difference between TWT and Klystron
15)M/W Solid – state Device & MICS, M/W Bipolar Transistor; M/W FET
a)Difference between microwave SS devices and conventional devices
b)Difference in MW FET and Transistor over conventional.
c)MIC structure
d)MIC applications
16)Varactor diode, Parametric Amplifiers
a)Diodes in microwave region
b)Implicit variable capacitance
c)Step up and Step down paramps
d)Amplification in paramps and efficiency
17)Step –Recovery Diodes,pin Diode, Schottky Diode
a)Discuss function in microwave region
b)Obtain harmonics from SR diode
c)Discuss metal semiconductor device
d)Insulating layer in PIN
18)Tunnel Diode , Gunn Diode
a)Concept of tunneling
b)Gunn diode called so?
c)Range of frequencies for diodes
d)Which diode can be used as oscillator?
19)Microwave Measurements (Measurements of frequency, power, attenuation, phase shift,
VSWR, impedance)
a)Discuss various measurements wrt lab also
b)Mechanical measurements also to be included
c)Ranges of power measurements
d)Devices to attain phase-shift
20) Read Diode ,Impatt, Trapatt
a)What is their requirement?
b)Which diode was invented first?
c)Discuss Impact ionization
21)Introduction to MIC, Stripline and Microstrips
a)Need in defence
b)Difference in stripline and microstrip
c)Various w/h ratios
22)Introduction to fabrication of MICs
a)All steps of fabrication
b)Detailed photolithography, etching
c)Green ,yellow room for photolithography
23)Introduction to Microwave Detectors, Mixers, Switches
24)Introduction to Microwave filters.
25)Radar range equation; Overview of pulsed radar;
26)Overview of CW Doppler Radar; Overview of MTI radar.
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