Example based on Directional Coupler

Example on Directional Coupler in Microwave Engineering is explained with following outlines.
0. Directional Coupler
1. Basics of Directional Coupler
2. Example on Directional Coupler
3. Directivity of Directional Coupler
4. Coupling of Directional Coupler
5. Isolation of Directional Coupler
Chapter-wise detailed Syllabus of the Microwave Engineering Course is as follows:
Chapter-1 Transmission Line in Microwave: • Transmission Line in M...
Advantages of Microwave, Basics of Transmission Line, Parameters of Transmission Line, Types of Transmission Line, Examples on Transmission Line, Transmission Line Parameters, Impedance matching of Transmission Line, Losses in Transmission Line, Parameters of Transmission Line {Propagation constant, Phase constant, Attenuation constant, Characteristics Impedance, Reflection Coefficient, Transmission Coefficient, VSWR, Input Impedance, Line Impedance}.
Chapter-2 Smith Chart: • Smith Chart in Microwa...
Basics of Smith Chart, Mathematics of Smith Chart, Examples on Smith Chart, Smith Chart Examples on {VSWR, Reflection Coefficient, Load Impedance, Input Impedance, Line Impedance, Vmax and Vmin location, Admittance, Parallel stub Impedance matching, Series stub Impedance matching}.
Chapter-3 Scattering Parameters/ S Parameters: • Scattering Parameters,...
Basics of Scattering parameters, Properties of Scattering parameters, Scattering parameters for two port network, Scattering parameters for four port network, Examples on Scattering parameters.
Chapter-4 Waveguides: • Waveguides in Microwav...
Basics of Waveguide, Parameters of Waveguide, Comparison of Waveguide and Transmission line, Why TEM Mode is not possible in rectangular Waveguide, Parallel plate waveguide, Rectangular Waveguide, Group velocity and phase velocity in rectangular Waveguide, Modes in Rectangular Waveguide, Degenerated Modes in Rectangular Waveguide, Dominant Modes if Waveguide, Cut off frequency in rectangular Waveguide, Circular Waveguide, Examples of circular Waveguide, Comparison of circular waveguide and rectangular waveguide, Examples on waveguide.
Chapter-5 Microwave Devices: • Microwave Devices
Isolator in Microwave, Circulator in Microwave, Examples on Circulator in Microwave, Directional Coupler in Microwave, Example of directional coupler in Microwave, Two holes directional coupler in Microwave, E plane Tee, H plane Tee, Magic Tee, Hybrid Ring or Rat Race coupler, Gyrator.
Chapter-6 Microwave Sources: • Microwave Sources
Reflex Klystron, Two cavity Klystron amplifier, Comparison of Reflex klystron and two cavity klystron, Magnetron Oscillator, Magnetron zero mode, Magnetron pi mode, Magnetron mode jumping, Magnetron strapping, Travelling wave tube, Backward wave oscillator, Parametric Amplifier, MASER - Microwave Amplification Stimulated Emission Radiation, Cavity Resonator, Limitations of conventional tubes over microwave tubes.
Chapter-7 Microwave Diodes: • Microwave Diodes
Schottky Diode, Gunn Diode, Varactor Diode, TRAPATT Diode, Tunnel Diode, IMPATT Diode, BARITT Diode, PIN Diode, Step recovery Diode.
Chapter-8 Microwave Applications: • Microwave Applications
EMI, EMC, Phase Shifter, Microwave Transistors.
Chapter-9 Microwave Measurement: • Microwave Measurement
Spectrum Analyzer, VNA Calibration, Network Analyzer.
Engineering Funda channel is all about Engineering and Technology. Here this video is a part of Microwave Engineering.
#DirectionalCoupler #MicrowaveEngineering #EngineeringFunda

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[@manavgupta1407]

in directivity, why we multiplied and divided by p1, why not directly use s43? what is the use of s43 then? also when we calculated s matrix, it had zeros in it, but this example has no zero in matrix.

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[@nikhilyadav9167]

sir i have exam tomorrow in the previous videos the formulas that you used were different but you used different formulas for directivity, coupling and isolation.

[@shantanutikale1007]

very well explanation, thankyou

[@EngineeringFunda]

Your positive comments motivates me, Thanks and welcome 🙏

[@rishabhjha8935]

Why didn't you take p4/p3 as S43?

[@premsh5130]

Same doubt

[@ushasr2821]

got confused sir, update this video else it would be kind of negative remarks on the other videos even though they are good,

[@ANKITSHARMA-zs1gm]

Sir please solve 4 and 5 more examples based on directional coupler.
Please fast

[@neilshaw1202]

in 8:11, The coupling factor should be power at the input(P1) to power coupled at the output in the auxiliary arm(P4).
C = 10 (log P1/P4) db.

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[@thetravellingengineer3735]

Sir please improve your sound quality and there are many points which are confusing

[@gregorypflaum3177]

I think this is incorrect. For the coupler to have any directivity, the isolation must be greater than the coupling factor. Many directional couplers are backward wave couplers. If you consider port 3 as the coupled port and port 4 as the isolated port, than it will be a backward wave coupler. Under this assumption, the coupling factor then becomes 20 dB and the isolation is 26 dB. That will give you 6 dB of directivity (quite poor).

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If i say 😀

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[@aishwaryasrivastava3998]

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