WEEK 4 TO 6, STUDENT HAS FINISH CHAPTER 2.....
IN THE CHAPTER 2, STUDENT HAS LEARN ABOUT THE MICROWAVE TRANSMISSION LINE. THE MOST COMMON MICROWAVE TRANSMISSION LINE IS A WAVEGUIDE. THE DEFINITION OF WAVEGUIDE IS A HOLLOW PIPE / METAL TUBE USED TO GUIDE THE HIGH FREQUENCY ELECTROMAGNETIC WAVE FROM PLACE TO PLACE
a) RECTANGULAR WAVEGUIDE
-rectangular cross section
-material used are copper, aluminium and brass
-used widely as connectors between antenna and designated electronic equipments
-also used in the laboratory because they are light
-for high power microwave signal, the material must has a low temperature coefficient, so that stable in size
The diagram of rectangular waveguide
b) CIRCULAR WAVEGUIDE
-circular cross section
-be able to guide signal in range of 40-300 GHz, thus known as submillimeter waveguide
-be able to guide the wave in limited to special case-technical shape and a special propagation mode
-be able to guide wave in smaller area and path because it is easy to control
-easy to construct
-easy to connect the waveguide by using plumbing mehod
The diagram of circular waveguide
STUDENT ALSO HAS LEARN ABOUT THE CALCULATION OF RECTANGULAR WAVEGUIDE AND CIRCULAR WAVEGUIDE
THERE ARE SOME FORMULA THAT USE IN THE CALCULATION OF RECTANGULAR WAVEGUIDE AND CIRCULAR WAVEGUIDE
RECTANGULAR WAVEGUIDE
1) cut off frequency
2) cut off wavelength
3) phase velocity
4) group velocity
5) guide wavelength
6) characteristic impedence
CIRCULAR WAVEGUIDE
AFTER THAT, STUDENT WAS TRY THE QUESTION ABOUT THE CALCULATION RECTANGULAR WAVEGUIDE AND CIRCULAR WAVEGUIDE
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