10. What is rectangular waveguide
Rectangular waveguide is one of the types of waveguides.The shape of it is a hollow metallic tube with rectangular cross section as shown in the figure with dimension 'a' along x axis and dimension 'b' along y axis.
♦ Electric and magnetic fields of the signal is confined within the waveguide and no power is lost.
♦ Since normally waveguide are air filled a dielectric loss exists but negligible.Also some power lost as heat at walls of the waveguide but small.
♦ Possible to send several electromagnetic waves simultaneously through waveguide
♦ A rectangular waveguide supports TE and TM modes but not TEM waves
♦ A given waveguide have a cut off frequency for each mode, below which attenuation takes place.
♦ The dominant mode in rectangular waveguide is TE10
♦ The mode supported by the waveguide is determined by the dimensions of the waveguide and the dielectric inside the waveguide.
♦ Electric and magnetic fields of the signal is confined within the waveguide and no power is lost.
♦ Since normally waveguide are air filled a dielectric loss exists but negligible.Also some power lost as heat at walls of the waveguide but small.
♦ Possible to send several electromagnetic waves simultaneously through waveguide
♦ A rectangular waveguide supports TE and TM modes but not TEM waves
♦ A given waveguide have a cut off frequency for each mode, below which attenuation takes place.
♦ The dominant mode in rectangular waveguide is TE10
♦ The mode supported by the waveguide is determined by the dimensions of the waveguide and the dielectric inside the waveguide.
0 comments :
Post a Comment